CN115523559B

CN115523559B - Ice-cold thermoelectric energy supply system, winter heating method, summer cooling method

Info

Publication number: CN115523559B
Application number: CN202211193310.0A
Authority: CN
Inventors: 张世钢; 张弘
Original assignee: Beijing Qingjian Energy Technology Co ltd
Current assignee: Beijing Qingjian Energy Technology Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2025-09-02
Anticipated expiration: 2042-09-28
Also published as: CN115523559A

Abstract

The application discloses an ice-cold thermoelectric energy supply system, a winter heating method and a summer refrigerating method, which solve the problem of low energy utilization efficiency of a thermoelectric cold combined supply system. The ice-cold thermoelectric energy supply system comprises a first power generation device, an absorption ice-making heat supply unit, a cross-season cold and hot combined storage device, a heat exchanger, a water supply pipeline and a water return pipeline, wherein mediums are circulated in the water supply pipeline and the water return pipeline, high-temperature flue gas generated by the first power generation device is input into the absorption ice-making heat supply unit for heat exchange, the absorption ice-making heat supply unit transmits heat energy/cold energy to the cross-season cold and hot combined storage device, the cross-season cold and hot combined storage device transmits the heat energy/cold energy to the heat exchanger, the water supply pipeline and the water return pipeline are connected with the heat exchanger, and the heat exchanger outputs the heat energy/cold energy outwards through the water supply pipeline. The cross-season cold and hot combined storage device can store heat energy and cold energy and use the heat energy and cold energy in a cross-season mode, and has the characteristics of energy conservation, emission reduction, carbon emission reduction and running cost reduction.

Description

Ice-cold thermoelectric energy supply system, winter heating method and summer refrigerating method

Technical Field

The application relates to the technical field of urban energy, in particular to an ice-cold thermoelectric energy supply system, a winter heating method and a summer refrigerating method.

Background

The combined heat and power system can provide heat energy, electric energy and cold energy for users, can supply heat in winter and can cool in summer. Under the aim of double carbon, how to reduce the energy consumption and carbon emission of a heating and cooling system under the condition of feasible economy becomes a difficult problem to be solved in the development of industry.

The conventional combined heat and power system has some problems:

firstly, the initial investment of the system is high, the utilization hours are short, and the investment of the power generation equipment of the small-sized combined heat, electricity and cold supply system is large, so that the overall economy of the combined heat, electricity and cold supply system is poor;

Secondly, the energy utilization efficiency of the conventional combined heat and power system is still to be improved, the exhaust gas temperature after the combustion of fuel gas in the system is still higher and is more than about 100 ℃, the waste heat in the flue gas is not fully utilized, and a flue gas waste heat utilization mode is adopted in the conventional combined heat and power system, but the problem is that the conventional systems can only utilize a part of flue gas waste heat under the heating condition in winter, the exhaust gas temperature of the system is still high in summer and the like in non-heating seasons, and no good technology or method is available in summer for recovering low-temperature flue gas waste heat;

The third problem is that when the conventional combined cooling and power system operates under the working condition of combined cooling and power in summer, the system drives the lithium bromide absorption refrigerator to refrigerate by utilizing the high-temperature flue gas waste heat discharged by the generator, the refrigeration COP is lower, and compared with the conventional electric refrigeration, the system is not energy-saving compared with the cold and power split production under the working condition of combined cooling and power;

Fourth, the system produces only three products, namely heat, electricity and cold, and when more demands are met, for example, the system needs to produce ice for use in a refrigeration cold chain or the like in some cases.

Disclosure of Invention

In order to solve the problems in the prior art, the application aims to provide an ice-cold heat electricity energy supply system, a winter heating method and a summer refrigerating method, which can realize the storage of heat energy and cold energy and the use of the heat energy and the cold energy in a cross-season mode and have the characteristics of energy conservation, emission reduction, carbon emission reduction and running cost reduction.

In order to achieve the technical purpose, the application adopts the following technical scheme:

The first aspect of the application provides an ice-cold thermoelectric energy supply system, which comprises a first power generation device, an absorption ice-making heat supply unit, a cross-season cold and hot combined storage device, a heat exchanger, a water supply pipeline and a water return pipeline, wherein the water supply pipeline and the water return pipeline are communicated with a medium;

The high-temperature flue gas generated by the first power generation device is input into the absorption type ice making and heat supplying unit for heat exchange, the absorption type ice making and heat supplying unit transmits heat energy/cold energy to the cross-season cold and hot combined storage device, the cross-season cold and hot combined storage device transmits the heat energy/cold energy to the heat exchanger, the water supply pipeline and the water return pipeline are connected with the heat exchanger, and the heat exchanger outputs heat energy/cold energy outwards through the water supply pipeline.

Optionally, the cross-season cold and hot combined storage device comprises a first inlet and a second inlet, the heat exchanger comprises a first heat exchanger inlet, a first heat exchanger outlet, a second heat exchanger inlet and a second heat exchanger outlet, and the absorption type ice making and heat supplying unit further comprises a second absorption type ice making and heat supplying unit inlet and a second absorption type ice making and heat supplying unit outlet;

The first inlet and the second outlet are respectively connected to the second inlet of the absorption ice-making heat supply unit and the second outlet of the heat exchanger, and the second inlet and the second outlet are respectively connected to the second outlet of the absorption ice-making heat supply unit and the second inlet of the heat exchanger;

The first inlet of the heat exchanger is connected with the water return pipeline, and the first outlet of the heat exchanger is connected with the water supply pipeline.

Optionally, the system further comprises a first electric refrigerator, wherein the first electric refrigerator comprises a first electric refrigerator first inlet, a first electric refrigerator first outlet, a first electric refrigerator second inlet and a first electric refrigerator second outlet, the first power generation device comprises a fuel inlet and a flue gas outlet, and the absorption type ice-making heat supply unit comprises an absorption type ice-making heat supply unit first inlet, an absorption type ice-making heat supply unit first outlet, an absorption type ice-making heat supply unit third inlet and an absorption type ice-making heat supply unit third outlet;

The fuel enters the first power generation device from the fuel inlet, the generated high-temperature smoke is discharged from the smoke outlet, and the smoke outlet is connected with the third inlet of the absorption ice-making heat supply unit;

The first inlet of the first electric refrigerator is connected with the water return pipeline, the first outlet of the first electric refrigerator is connected with the water supply pipeline, the second inlet of the first electric refrigerator is connected with the first outlet of the absorption ice-making heat supply unit, and the second outlet of the first electric refrigerator is connected with the first inlet of the absorption ice-making heat supply unit.

Optionally, the system further comprises a high-temperature flue gas and water heat exchange device, wherein the high-temperature flue gas and water heat exchange device comprises a first inlet of the high-temperature flue gas and water heat exchange device, a first outlet of the high-temperature flue gas and water heat exchange device, a second inlet of the high-temperature flue gas and water heat exchange device, and a second outlet of the high-temperature flue gas and water heat exchange device, the first inlet of the high-temperature flue gas and water heat exchange device is connected with the water return pipeline, the first outlet of the high-temperature flue gas and water heat exchange device is connected with the water supply pipeline, and the second inlet of the high-temperature flue gas and water heat exchange device is connected with the third outlet of the absorption ice-making heat supply unit.

Optionally, the system further comprises a low-temperature flue gas and water heat exchange device and an electric heating pump, wherein the low-temperature flue gas and water heat exchange device comprises a first inlet of the low-temperature flue gas and water heat exchange device, a first outlet of the low-temperature flue gas and water heat exchange device, a second inlet of the low-temperature flue gas and water heat exchange device and a second outlet of the low-temperature flue gas and water heat exchange device, and the electric heating pump comprises a first inlet of the electric heating pump, a first outlet of the electric heating pump, a second inlet of the electric heating pump and a second outlet of the electric heating pump;

The first inlet of the electric heating pump is connected with the water return pipeline, the first outlet of the electric heating pump is connected with the water supply pipeline, the second inlet of the electric heating pump is connected with the first outlet of the low-temperature flue gas and water heat exchange device, and the second outlet of the electric heating pump is connected with the first inlet of the low-temperature flue gas and water heat exchange device;

The low-temperature flue gas and water heat exchange device second inlet is connected with the high-temperature flue gas and water heat exchange device second outlet, and the low-temperature flue gas and water heat exchange device second outlet is communicated with the atmosphere.

Optionally, the water heater further comprises a second electric refrigerator, wherein the second electric refrigerator comprises a second electric refrigerator first inlet, a second electric refrigerator first outlet, a second electric refrigerator second inlet and a second electric refrigerator second outlet, the second electric refrigerator first inlet is connected with the water return pipeline, the second electric refrigerator first outlet is connected with the water supply pipeline, the second electric refrigerator second inlet is connected with the heat exchanger second outlet, and the second electric refrigerator second outlet is connected with the first inlet and the first outlet;

A straight-through pipeline is connected between the second inlet of the heat exchanger and the second outlet of the heat exchanger, and a straight-through pipeline is connected between the second inlet of the second electric refrigerator and the second outlet of the second electric refrigerator.

Optionally, the system further comprises a third electric refrigerator, wherein the third electric refrigerator comprises a third electric refrigerator first inlet, a third electric refrigerator first outlet, a third electric refrigerator second inlet and a third electric refrigerator second outlet, the third electric refrigerator first inlet is connected with the absorption type ice-making heat supply unit second outlet, the third electric refrigerator first outlet is connected with the absorption type ice-making heat supply unit second inlet, the third electric refrigerator second inlet is connected with the water return pipeline, and the third electric refrigerator second outlet is connected with the water supply pipeline;

the first inlet and the second inlet are simultaneously connected with the first inlet of the absorption ice making heat supply unit and the first inlet of the high-temperature flue gas and water heat exchange device respectively, and the second inlet and the second outlet are simultaneously connected with the first outlet of the absorption ice making heat supply unit and the first outlet of the high-temperature flue gas and water heat exchange device respectively.

Optionally, the first inlet and the second inlet are provided with a seventh valve, and the second inlet of the heat exchanger is provided with a first valve;

a ninth valve is arranged on a path of the first inlet and the first outlet, which are connected with the second inlet of the absorption ice-making heat supply unit, and a sixth valve is arranged on a path of the first inlet and the first outlet, which are connected with the second outlet of the heat exchanger;

An eighth valve is arranged on a path of the second inlet and the second outlet, which are connected with the second outlet of the absorption ice-making heat supply unit, and a fifth valve is arranged on a path of the second inlet and the second outlet, which are connected with the second inlet of the heat exchanger;

And a second valve is arranged on the straight-through pipeline between the second inlet of the heat exchanger and the second outlet of the heat exchanger.

Optionally, the second electric refrigerator second inlet is provided with a third valve;

the sixth valve is simultaneously positioned on a path of the first inlet and the outlet connected with the second outlet of the second electric refrigerator;

the fifth valve is simultaneously positioned on a path of the second inlet and the second outlet connected with the second inlet of the second electric refrigerator;

And a fourth valve is arranged on a straight-through pipeline between the second inlet of the second electric refrigerator and the second outlet of the second electric refrigerator.

Optionally, the second inlet of the first electric refrigerator is provided with a fourteenth valve, and the second outlet of the first electric refrigerator is provided with a thirteenth valve;

A fifteenth valve is arranged on a path of the first inlet and the second inlet, which are connected with the first inlet of the absorption ice-making heat supply unit, and the path of the high-temperature flue gas and the first outlet of the water heat exchange device, and a tenth valve is arranged on a path of the second inlet and the second outlet, which are connected with the first outlet of the absorption ice-making heat supply unit;

The path of the first inlet of the high-temperature flue gas and water heat exchange device, which is connected with the water return pipeline, is provided with a twelfth valve, and the path of the first outlet of the high-temperature flue gas and water heat exchange device, which is connected with the water supply pipeline, is provided with an eleventh valve.

Optionally, the first power generation device further comprises a cylinder sleeve hot water outlet, a cylinder sleeve hot water inlet, an intercooling water outlet and an intercooling water inlet, the absorption type ice-making heat supply unit further comprises an absorption type ice-making heat supply unit fourth inlet and an absorption type ice-making heat supply unit fourth outlet, the cylinder sleeve hot water outlet is connected with the absorption type ice-making heat supply unit fourth inlet, the cylinder sleeve hot water inlet is connected with the absorption type ice-making heat supply unit fourth outlet, and the intercooling water outlet is connected with other heat exchangers.

Optionally, the first power generation device is a gas turbine, or a gas-steam combined cycle generator, or an internal combustion engine, or an external combustion engine, or a fuel cell;

the absorption ice-making heat supply unit is of a smoke driving type, or a smoke and hot water mixed driving type.

Optionally, a plurality of the cross-season cold and hot combined storage devices connected in series or in parallel are included;

Or the cross-season cold and hot combined storage devices comprise N cells, N is a natural number more than or equal to 2, and the N cells are connected in parallel or in series.

Optionally, the low-temperature flue gas and water heat exchange device is a solid wall heat exchanger, or a direct contact heat exchanger, or a spray tower.

The second aspect of the application provides a winter heating method implemented by the ice-cold thermoelectric energy supply system, wherein the initial state before winter heating is that the cold and hot combined storage device is high-temperature hot water with the temperature of 90-95 ℃ and all valves are in a closed state;

Heating is started in winter, including:

the working condition is that the heat exchanger supplies heat;

The first valve, the fifth valve, the sixth valve and the seventh valve are opened, high-temperature hot water enters a second inlet of a heat exchanger of the heat exchanger from a second inlet and a second outlet of the heat exchanger through the fifth valve and the first valve, and flows out from a second outlet of the heat exchanger and enters the first inlet and the first outlet through the sixth valve and the seventh valve;

The backwater of the backwater pipeline enters the first inlet of the heat exchanger, flows out from the first outlet of the heat exchanger and is fed into the water supply pipeline after being heated, and supplies heat to the outside;

After the heat is placed in the cold and hot combined storage device in a cross-season mode, the first valve, the fifth valve, the sixth valve and the seventh valve are all closed.

Optionally, the method further comprises:

The second working condition is a mode that the heat exchanger and the second electric refrigerator supply heat simultaneously;

The first valve, the third valve, the fifth valve, the sixth valve and the seventh valve are opened, high-temperature hot water enters a second inlet of the heat exchanger through the fifth valve and the first valve from a second inlet and a second outlet of the heat exchanger, flows out from the second outlet of the heat exchanger, enters a second inlet of the second electric refrigerator through the third valve, flows out from a second outlet of the second electric refrigerator, and enters the first inlet and the first outlet through the sixth valve and the seventh valve;

The backwater of the backwater pipeline enters the first inlet of the second electric refrigerator, and after being heated, flows out of the first outlet of the second electric refrigerator and is fed into the water supply pipeline to supply heat to the outside;

After the heat is placed in the cold and hot combined storage device in a cross-season mode, the first valve, the third valve, the fifth valve, the sixth valve and the seventh valve are all closed.

Optionally, the method further comprises:

the cold accumulation and heat supply mode of the cross-season cold and heat combined storage device is realized, the cross-season cold and heat combined storage device starts to realize a cold accumulation function, the absorption ice making heat supply unit starts to supplement cold for the cross-season cold and heat combined storage device, and simultaneously, the first electric refrigerator, the high-temperature flue gas and water heat exchange device and the electric heat pump supply heat to the outside;

The cold and hot combined storage device is characterized in that low temperature water with the temperature of 1-10 ℃ is in the cold and hot combined storage device in a cross-season mode, a seventh valve, an eighth valve and a ninth valve are opened, the low temperature water enters a second inlet of an absorption type ice making and heating unit of the absorption type ice making and heating unit from a first inlet and outlet through the seventh valve and the ninth valve, and after being cooled, flows out from a second outlet of the absorption type ice making and heating unit, enters a second inlet and outlet through the eighth valve, and cold water or ice slurry is stored in the cold and hot combined storage device in a cross-season mode;

Simultaneously, the first power generation device, the first electric refrigerator, the high-temperature flue gas and water heat exchange device, the low-temperature flue gas and water heat exchange device and the electric heating pump are all in an operation state, and backwater of the backwater pipeline respectively enters the first electric refrigerator, the high-temperature flue gas and water heat exchange device and the electric heating pump, and after being heated, respectively flows out and is fed into a water supply pipeline (200) to supply heat to the outside.

Optionally, the method further comprises:

The cold and hot combined storage device in a cross-season mode comprises N small chambers, N is a natural number which is more than or equal to 2, the N small chambers are connected in parallel, cold accumulation is carried out after heat release of any small chamber is finished, and heat is supplied to other small chambers.

The third aspect of the application provides a summer refrigeration method implemented by the ice-cold thermoelectric energy supply system, wherein the initial state before summer cooling is that the cross-season cold and hot combined storage device is ice slurry or ice water mixture, the temperature is 0 ℃, and all valves are in a closed state;

The cooling is started in summer, which comprises the following steps:

the working condition is that the heat exchanger supplies cold;

The first valve, the fifth valve, the sixth valve and the seventh valve are opened, ice slurry or cold water enters the second inlet of the heat exchanger through the fifth valve and the first valve from the second inlet and flows out from the second outlet of the heat exchanger, and enters the first inlet and the first outlet through the sixth valve and the seventh valve;

the backwater of the backwater pipeline enters a first inlet of a heat exchanger of the heat exchanger, and after being cooled, flows out from a first outlet of the heat exchanger and is fed into a water supply pipeline to refrigerate outwards;

after the cold and hot combined storage device is cooled, the first valve, the fifth valve, the sixth valve and the seventh valve are all closed.

Optionally, the method further comprises:

the second working condition is a mode that the heat exchanger and the second electric refrigerator are used for cooling simultaneously;

The first valve, the third valve, the fifth valve, the sixth valve and the seventh valve are opened, ice slurry or cold water enters the second inlet of the heat exchanger from the second inlet and the second outlet of the heat exchanger through the fifth valve and the first valve, flows out from the second outlet of the heat exchanger, enters the second inlet of the second electric refrigerator through the third valve, flows out from the second outlet of the second electric refrigerator, and enters the first inlet and the first outlet through the sixth valve and the seventh valve;

The backwater of the backwater pipeline enters the first inlet of the second electric refrigerator, and after being cooled, flows out of the first outlet of the second electric refrigerator and is fed into the water supply pipeline to refrigerate outwards;

after the cold and hot combined storage device is cooled, the first valve, the third valve, the fifth valve, the sixth valve and the seventh valve are all closed.

Optionally, the method further comprises:

and (3) working condition III: the cross-season cold and hot combined storage device stores heat and simultaneously supplies cold for the system, the cross-season cold and hot combined storage device starts to realize a heat storage function, the absorption type ice making and heat supplying unit starts to supplement heat for the cross-season cold and hot combined storage device, and the third electric refrigerator supplies cold to the outside;

the seventh valve, the tenth valve and the fifteenth valve are opened, water enters the first inlet of the absorption type ice making and heating unit from the first inlet and the seventh valve and the fifteenth valve, and after being heated, flows out from the first outlet of the absorption type ice making and heating unit and enters the first inlet and the first outlet through the tenth valve;

water enters a first inlet of the high-temperature flue gas and water heat exchange device from a first inlet and a second inlet of the high-temperature flue gas and water heat exchange device through a seventh valve and a fifteenth valve, and after being heated, flows out of a first outlet of the high-temperature flue gas and water heat exchange device and enters the first inlet and the second outlet through a tenth valve;

cold water in the absorption ice-making heat supply unit flows out from a second outlet of the absorption ice-making heat supply unit, enters a first inlet of a third electric refrigerator of the third electric refrigerator, flows out from a first outlet of the third electric refrigerator, and enters a second inlet of the absorption ice-making heat supply unit;

The backwater of the backwater pipeline enters the first inlet of the third electric refrigerator, and after being cooled, flows out of the first outlet of the third electric refrigerator and is fed into the water supply pipeline to refrigerate outwards;

after the heat accumulation of the cross-season cold and hot combined storage device is finished, the seventh valve, the tenth valve and the fifteenth valve are all closed.

Optionally, the method further comprises:

And under the fourth working condition, the cross-season cold and hot combined storage device stores heat and simultaneously adopts a system cold supply mode, the cross-season cold and hot combined storage device starts to realize a heat storage function, the absorption type ice making and heat supplying unit starts to supplement heat for the cross-season cold and hot combined storage device, and simultaneously the first electric refrigerator or the second electric refrigerator supplies cold to the outside.

According to the technical scheme, the application provides an ice-cold thermoelectric energy supply system, a winter heating method and a summer refrigerating method, which have the following advantages:

this patent proposes an ice, cold, electricity, hot system, can produce four kinds of products.

The utilization hour number of the system is greatly increased, and the problem of poor economical efficiency of the conventional combined heat, power and cold supply system is solved.

Under the same power generation installation as the conventional combined heat and power system, the system can not only increase the heat supply capacity, but also increase the cooling capacity, and greatly improve the heat supply and cooling capacity and the annual comprehensive energy efficiency.

The waste heat can be fully absorbed to the high-temperature flue gas generated by the first power generation device, the deep recovery of the flue gas waste heat can be realized in summer, the energy efficiency of the system is improved, and the energy is saved under the combined cooling and power supply working condition.

The heat supply and the cold supply can share a transmission and distribution network, and the heat supply and the cold supply can share the same network.

The system has a daily peak shaving mode, and daily peak shaving can be performed for electric power all the year round. Because the system has a cross-season cold and heat combined storage device, cold or heat can be stored in one of the cells in one day, when electricity consumption is high, the power grid is in power shortage, the system uses self cold and heat storage to supply cold and heat without peak electricity, when electricity consumption is low, the power grid encourages users to use electricity for multiple purposes, and the system can use electricity for multiple purposes to generate cold and heat to store in one cell of the cross-season cold and heat combined storage device.

The cold, hot, gas and electricity four-network cooperation is realized through the configuration and the operation of the system.

The cold and the heat can be stored in spring and autumn, the cold is released in summer, and the heat is released in winter.

Some of the ice produced may also be sold directly for use in the cold chain.

Drawings

FIG. 1 is a schematic diagram of an ice-cold thermoelectric energy supply system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an ice-cold thermoelectric power supply system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an ice-cold thermoelectric power supply system according to an embodiment of the present application;

fig. 4 is a schematic diagram of an ice-cold thermoelectric energy supply system according to an embodiment of the present application.

The reference numerals indicate 1, a first valve, 2, a second valve, 3, a third valve, 4, a fourth valve, 5, a fifth valve, 6, a sixth valve, 7, a seventh valve, 8, an eighth valve, 9, a ninth valve, 10, a tenth valve, 11, an eleventh valve, 12, a twelfth valve, 13, a thirteenth valve, 14, a fourteenth valve;

20. A first power generation device; 21 parts of fuel inlet, 22 parts of flue gas outlet, 23 parts of cylinder sleeve hot water outlet, 24 parts of cylinder sleeve hot water inlet, 25 parts of intercooling water outlet, 26 parts of intercooling water inlet;

30. An absorption ice-making heat supply unit; 31, an absorption type ice making and heat supplying unit first inlet, 32, an absorption type ice making and heat supplying unit first outlet, 33, an absorption type ice making and heat supplying unit second inlet, 34, an absorption type ice making and heat supplying unit second outlet, 35, an absorption type ice making and heat supplying unit third inlet, 36, an absorption type ice making and heat supplying unit third outlet, 37, an absorption type ice making and heat supplying unit fourth inlet, 38, an absorption type ice making and heat supplying unit fourth outlet;

40. a cold and hot combined storage device for seasons 41, a first inlet and outlet 42, a second inlet and outlet 42;

50. The first electric refrigerator, 51, a first inlet of the first electric refrigerator, 52, a first outlet of the first electric refrigerator, 53, a second inlet of the first electric refrigerator, 54, a second outlet of the first electric refrigerator;

60. A heat exchanger; 61, a first inlet of the heat exchanger, 62, a first outlet of the heat exchanger, 63, a second inlet of the heat exchanger, 64, a second outlet of the heat exchanger;

70. The device comprises a high-temperature flue gas and water heat exchange device, a first inlet of the high-temperature flue gas and water heat exchange device, a first outlet of the high-temperature flue gas and water heat exchange device, a second inlet of the high-temperature flue gas and water heat exchange device, and a second outlet of the high-temperature flue gas and water heat exchange device, wherein the first inlet of the high-temperature flue gas and water heat exchange device is provided with a first outlet of the high-temperature flue gas and water heat exchange device;

80. The device comprises a low-temperature flue gas and water heat exchange device, a first inlet of the low-temperature flue gas and water heat exchange device, a first outlet of the low-temperature flue gas and water heat exchange device, a second inlet of the low-temperature flue gas and water heat exchange device, a second outlet of the low-temperature flue gas and water heat exchange device, and a second outlet of the low-temperature flue gas and water heat exchange device, wherein the first inlet of the low-temperature flue gas and water heat exchange device is 81;

90. an electric heat pump; 91, a first inlet of the electric heating pump, 92, a first outlet of the electric heating pump, 93, a second inlet of the electric heating pump, 94, and a second outlet of the electric heating pump;

100. A second electric refrigerator; 101, a first inlet of a second electric refrigerator, 102, a first outlet of the second electric refrigerator, 103, a second inlet of the second electric refrigerator, 104, a second outlet of the second electric refrigerator;

110. the system comprises a third electric refrigerator, a first inlet of the 111 th electric refrigerator, a first outlet of the 112 th electric refrigerator, a second inlet of the 113 th electric refrigerator, and a second outlet of the 114 th electric refrigerator;

200. A water supply line;

300. and a water return pipeline.

Detailed Description

The core idea of the application is that:

The application provides a novel system aiming at the problems of high initial investment, short utilization hours, poor overall economy, further improvement of the energy utilization efficiency of the system, energy saving failure compared with cold and electricity separate production under the combined cooling and power working condition, single product (only heat, electricity and cold) produced by the system and the like of the traditional combined cooling and power system.

The system generates electricity and at the same time,

① In winter, utilizing flue gas waste heat or hot water or electrically driven ice making and heating unit to deeply extract phase change heat from water, using the phase change heat extracted from water and driving energy to supply heat, greatly increasing heat supply quantity, simultaneously obtaining free ice or cold water, storing the obtained ice or cold water in a cross-season cold and heat combined storage device (cold storage in this time), and storing cold energy until cooling in summer and using the cold energy for air conditioner cooling. ② The heat (the residual heat stored in summer and the heat dissipated from the room air conditioner) in the cross-season cold and heat combined storage device is used for supplying heat at the same time, and after the heat is supplied, the heat is used for storing ice or cold produced by the ice making heat supply unit.

And in summer ①, discharging the cold energy stored in the cross-season cold and heat combined storage device, and supplementing conventional electric refrigeration to meet the total requirement when the stored cold energy is insufficient to meet the total cold energy. ② After the cold energy of the cold and hot combined storage device is released, the heat dissipated by the air conditioner in the room is absorbed by utilizing flue gas, hot water waste heat or equipment in an electric drive system, the heat is stored in the cold and hot combined storage device (heat storage in this time), the stored heat is stored until a heating period for heating, and meanwhile, the refrigerating equipment in the system is utilized for cooling.

The smoke, the hot water waste heat or the electrically driven ice making and heat supplying machine, the electric refrigerating machine and the electric heating pump Xia Gongkuang in the system are put into use, the equipment utilization rate is high, the heat accumulation and cold accumulation temperature difference of the cross-season cold and hot combined storage device is large, the energy accumulation efficiency is extremely high, the device can be used in winter and summer, and the utilization time is long. The waste heat can be fully absorbed to the high-temperature flue gas generated by the first power generation device, the deep recovery of the flue gas waste heat can be realized in summer, the energy efficiency of the system is improved, and the energy is saved under the combined cooling and power supply working condition. Under the same power generation installation as the conventional combined heat and power system, the system can not only increase the heat supply capacity, but also increase the cooling capacity, and greatly improve the heat supply and cooling capacity and the annual comprehensive energy efficiency. The system may also produce a fourth product, ice.

The core idea of the application comprises an idea of a peak shaving mode in addition to the system, and the peak shaving function aims at reducing initial investment and the peak shaving function aims at reducing operation cost.

Firstly, the peak shaving function aiming at reducing initial investment specifically refers to:

In winter, one part of the heat supply quantity of the system is heat supply by using waste heat to drive the absorption type ice making and heat supplying machine to deeply supply heat, and the other part of the heat supply quantity of the system is heat stored in the cross-season cold and heat combined storage device, and when the system is configured, peak load of heat supply is used for the top of the cross-season cold and heat combined storage device, so that the installation and matching cost of the heat supply source are reduced. If the conventional heat supply is a heat and power cogeneration or a heat pump, the investment of the heat and power cogeneration and the electric heat pump, the cost of the infrastructure (heat and power cooperation) of the matched power supply, the power grid, the power transformation and the like is saved;

in summer, the system uses cold top peak cold load stored by the cross-season cold-hot combined storage device, so that the installation and matching cost of a cold source are greatly reduced (the cost of a set of infrastructure such as an electric refrigerator, a matching power supply, a power grid, a power transformer and the like is saved). (cold, electric synergy).

Meanwhile, the system can share a transmission and distribution network for heat supply and cold supply, and the network is the same as the cold and hot network. Finally, the cooperation of the cold network, the hot network, the gas network and the electric network is realized.

Secondly, the peak regulation function which aims at reducing the running cost also comprises two ideas of seasonal peak regulation function and daily peak regulation function.

Seasonal peak shaving function:

In winter, on the basis of the total heat supply amount, a part of the system is that the heat stored in summer and the heat dissipated from the room air conditioner are supplied by the cross-season cold and heat combined storage device, which is equivalent to reducing the total heat supply amount in winter. In the operation mode, the peak heat load of the stored hot top heat supply (for the severe cold period heat supply) is equivalent to the reduction of the peak heat supply amount. The heat required in the severe cold stage is high, the heat at the time is high-value heat, and when compared with the heat supply of fuel gas, the heat is equivalent to the most expensive natural gas saved in the severe cold stage, and the peak regulation of the fuel gas is realized, so that the cooperation of heat and gas is realized. In the future, the power supply is in a shortage in winter on the future power grid, and the heat supply quantity is reduced by heat release across seasons, so that the cogeneration can generate more power, and the seasonal peak shaving of the power grid is realized, so that the thermoelectric cooperation is realized. (peak of heat supply is cut by itself, peak is regulated by fuel gas, peak is regulated by electric power.)

In summer, seasonal electricity consumption peaks are caused by air conditioning electricity consumption of the power grid. In the total amount of cooling, part of the cooling in the system is obtained freely in winter, which is equivalent to reducing the total cooling capacity in summer, namely reducing the total power consumption of the air conditioner, and in the operation mode, the peak cooling load (the hottest month cooling) of the stored cold top is equivalent to reducing the peak cooling capacity. The cooling capacity required by the hottest month in summer is large, the cooling at the time is high-value cooling, the conventional electric refrigeration is replaced by the cooling, the refrigerating power consumption of the hottest month is saved, namely the electricity consumption peak of an air conditioner in summer is reduced, the seasonal peak regulation of a power grid is realized, and the cooling and electricity cooperation is realized. (peak of cooling is cut by oneself, peak regulation for electric power.)

The system can carry out daily peak regulation for electric power.

Because the system has a cross-season cold and heat combined storage device, cold or heat can be stored in one day, when electricity consumption is high, the power grid is short of electricity, the system uses self cold and heat storage to supply cold and heat without peak electricity, when electricity consumption is low, the power grid encourages users to use electricity for multiple purposes, and the system can generate the cold and heat for multiple purposes and store the cold and heat in the cross-season cold and heat combined storage device. (peak shaver for electric power day throughout the year)

The system can store cold and heat simultaneously in spring and autumn, the cold is released in summer, and the heat is released in winter.

For a better understanding of the objects, structure, and function of the application, a system and method for ice-cold thermoelectric power supply of the application is described in further detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1, an embodiment 1 of the present application is shown, and the embodiment provides an ice-cold thermoelectric energy supply system, which includes a first power generation device 20, an absorption ice-making and heat-supplying unit 30, a cross-season cold and hot combined storage device 40, a heat exchanger 60, a water supply pipeline 200, and a water return pipeline 300, wherein the water supply pipeline 200 and the water return pipeline 300 are circulated with media;

The medium is water when supplying heat, ice slurry or water when supplying cold, and the water supply pipeline 200 and the water return pipeline 300 can be connected to a heating system and an air conditioning system of a user;

the high-temperature flue gas generated by the first power generation device 20 is input into the absorption type ice making and heat supplying unit 30 for heat exchange, the absorption type ice making and heat supplying unit 30 transmits heat energy/cold energy to the cross-season cold and heat combined storage device 40, the cross-season cold and heat combined storage device 40 transmits the heat energy/cold energy to the heat exchanger 60, the water supply pipeline 200 and the water return pipeline 300 are connected with the heat exchanger 60, and the heat exchanger 60 outputs the heat energy/cold energy outwards through the water supply pipeline 200.

In one embodiment, the cross-season cold and heat storage device 40 comprises a first inlet 41 and a second inlet 42, the heat exchanger 60 comprises a heat exchanger first inlet 61, a heat exchanger first outlet 62, a heat exchanger second inlet 63 and a heat exchanger second outlet 64, and the absorption ice-making and heat-supplying unit 30 further comprises an absorption ice-making and heat-supplying unit second inlet 33 and an absorption ice-making and heat-supplying unit second outlet 34;

The first inlet and outlet 41 is respectively connected to the second inlet 33 of the absorption ice-making heat supply unit and the second outlet 64 of the heat exchanger, and the second inlet and outlet 42 is respectively connected to the second outlet 34 of the absorption ice-making heat supply unit and the second inlet 63 of the heat exchanger;

The heat exchanger first inlet 61 is connected to the water return line 300, and the heat exchanger first outlet 62 is connected to the water supply line 200.

In one embodiment, the ice-cold thermoelectric energy supply system further comprises a first electric refrigerator 50, the first electric refrigerator 50 comprising a first electric refrigerator first inlet 51, a first electric refrigerator first outlet 52, a first electric refrigerator second inlet 53, a first electric refrigerator second outlet 54, the first power generation device 20 comprising a fuel inlet 21, a flue gas outlet 22, the absorption ice-making heat supply unit 30 comprising an absorption ice-making heat supply unit first inlet 31, an absorption ice-making heat supply unit first outlet 32, an absorption ice-making heat supply unit third inlet 35, an absorption ice-making heat supply unit third outlet 36;

The fuel enters the first power generation device 20 from the fuel inlet 21, the generated high-temperature flue gas is discharged from the flue gas outlet 22, and the flue gas outlet 22 is connected with the third inlet 35 of the absorption ice-making heat supply unit;

the first electric refrigerator first inlet 51 is connected with the water return pipeline 300, the first electric refrigerator first outlet 52 is connected with the water supply pipeline 200, the first electric refrigerator second inlet 53 is connected with the first outlet 32 of the absorption ice-making heat supply unit, and the first electric refrigerator second outlet 54 is connected with the first inlet 31 of the absorption ice-making heat supply unit.

In one embodiment, the ice-cold thermoelectric energy supply system further comprises a high-temperature flue gas and water heat exchange device 70, the high-temperature flue gas and water heat exchange device 70 comprises a high-temperature flue gas and water heat exchange device first inlet 71, a high-temperature flue gas and water heat exchange device first outlet 72, a high-temperature flue gas and water heat exchange device second inlet 73 and a high-temperature flue gas and water heat exchange device second outlet 74, the high-temperature flue gas and water heat exchange device first inlet 71 is connected with the water return pipeline 300, the high-temperature flue gas and water heat exchange device first outlet 72 is connected with the water supply pipeline 200, and the high-temperature flue gas and water heat exchange device second inlet 73 is connected with the third outlet 36 of the absorption ice-making heat supply unit.

In one embodiment, the ice-cold thermoelectric energy supply system further comprises a low-temperature flue gas and water heat exchange device 80 and an electric heating pump 90, wherein the low-temperature flue gas and water heat exchange device 80 comprises a low-temperature flue gas and water heat exchange device first inlet 81, a low-temperature flue gas and water heat exchange device first outlet 82, a low-temperature flue gas and water heat exchange device second inlet 83, and a low-temperature flue gas and water heat exchange device second outlet 84, and the electric heating pump 90 comprises an electric heating pump first inlet 91, an electric heating pump first outlet 92, an electric heating pump second inlet 93, and an electric heating pump second outlet 94;

The electric heat pump first inlet 91 is connected with the water return pipeline 300, the electric heat pump first outlet 92 is connected with the water supply pipeline 200, the electric heat pump second inlet 93 is connected with the low-temperature flue gas and water heat exchange device first outlet 82, and the electric heat pump second outlet 94 is connected with the low-temperature flue gas and water heat exchange device first inlet 81;

The low-temperature flue gas and water heat exchange device second inlet 83 is connected with the high-temperature flue gas and water heat exchange device second outlet 74, and the low-temperature flue gas and water heat exchange device second outlet 84 is communicated with the atmosphere.

In one embodiment, as shown in fig. 2, the ice-cold thermoelectric power supply system further includes a second electric refrigerator 100, the second electric refrigerator 100 includes a second electric refrigerator first inlet 101, a second electric refrigerator first outlet 102, a second electric refrigerator second inlet 103, and a second electric refrigerator second outlet 104, the second electric refrigerator first inlet 101 is connected to the water return line 300, the second electric refrigerator first outlet 102 is connected to the water supply line 200, the second electric refrigerator second inlet 103 is connected to the heat exchanger second outlet 64, and the second electric refrigerator second outlet 104 is connected to the first inlet and outlet 41.

In one embodiment, a through line is connected between the heat exchanger second inlet 63 and the heat exchanger second outlet 64, and a through line is connected between the second electric refrigerator second inlet 103 and the second electric refrigerator second outlet 104. By this arrangement, the heat exchanger 60 and the second electric refrigerator 100 can be selectively operated, and the high-temperature hot water, ice slurry or cold water outputted from the second inlet and outlet 42 does not enter the heat exchanger 60 but only enters the second electric refrigerator 100, or only enters the heat exchanger 60 but not the second electric refrigerator 100.

The second electric refrigerator 100 has the functions of reducing the temperature of hot water in a stepped manner in winter, taking away heat for heating in a cooling mode of the electric refrigerator, cooling the water cooled by the second electric refrigerator 100 or returning the water to the cold-hot combined storage device 40 in a cross-season mode, switching the chilled water side and the cooling water side of the second electric refrigerator 100 in summer, recovering heat dissipated by a room in summer, and raising the temperature of backwater of a heat supply network to a heat source end.

In one embodiment, as shown in fig. 3, the ice-cold thermoelectric power supply system further includes a third electric refrigerator 110, the third electric refrigerator 110 includes a third electric refrigerator first inlet 111, a third electric refrigerator first outlet 112, a third electric refrigerator second inlet 113, and a third electric refrigerator second outlet 114, the third electric refrigerator first inlet 111 is connected to the absorption ice-making heat supply unit second outlet 34, the third electric refrigerator first outlet 112 is connected to the absorption ice-making heat supply unit second inlet 33, the third electric refrigerator second inlet 113 is connected to the return water line 300, and the third electric refrigerator second outlet 114 is connected to the water supply line 200;

The first inlet and outlet 41 is simultaneously and respectively connected with the first inlet 31 of the absorption ice making heat supply unit, the first inlet 71 of the high-temperature flue gas and water heat exchange device, and the second inlet and outlet 42 is simultaneously and respectively connected with the first outlet 32 of the absorption ice making heat supply unit, the first outlet 72 of the high-temperature flue gas and water heat exchange device.

In one embodiment, the first inlet and outlet 41 is provided with a seventh valve 7 and the heat exchanger second inlet 63 is provided with a first valve 1;

a ninth valve 9 is arranged on the path of the first inlet and outlet 41 connected with the second inlet 33 of the absorption ice-making heat supply unit, and a sixth valve 6 is arranged on the path of the first inlet and outlet 41 connected with the second outlet 64 of the heat exchanger;

An eighth valve 8 is arranged on the path of the second inlet and outlet 42 connected with the second outlet 34 of the absorption ice-making heat supply unit, and a fifth valve 5 is arranged on the path of the second inlet and outlet 42 connected with the second inlet 63 of the heat exchanger;

a second valve 2 is arranged in the through line between the second inlet 63 of the heat exchanger and the second outlet 64 of the heat exchanger. When the second valve 2 is opened, the high temperature hot water, ice slurry or cold water outputted from the second inlet and outlet 42 does not enter the heat exchanger 60, and when the second valve 2 is closed, the high temperature hot water, ice slurry or cold water outputted from the second inlet and outlet 42 may enter the heat exchanger 60.

In one embodiment, the second electric refrigerator second inlet 103 is provided with a third valve 3;

The sixth valve 6 is simultaneously positioned on the path of the first inlet and outlet 41 connected with the second outlet 104 of the second electric refrigerator;

The fifth valve 5 is simultaneously positioned on the path of the second inlet and outlet 42 connected with the second inlet 103 of the second electric refrigerator;

A fourth valve 4 is arranged in the through line between the second electric refrigerator second inlet 103 and the second electric refrigerator second outlet 104. When the fourth valve 4 is opened, the high-temperature hot water, ice slurry or cold water outputted from the second inlet and outlet 42 does not enter the second electric refrigerator 100, and when the fourth valve 4 is closed, the high-temperature hot water, ice slurry or cold water outputted from the second inlet and outlet 42 may enter the second electric refrigerator 100.

In one embodiment, the first electric refrigerator second inlet 53 is provided with a fourteenth valve 14 and the first electric refrigerator second outlet 54 is provided with a thirteenth valve 13;

A fifteenth valve (15) is arranged on the path of the first inlet and outlet 41, which is connected with the first inlet 31 of the absorption ice making heat supply unit, the first inlet 71 of the high-temperature flue gas and water heat exchange device, and a tenth valve 10 is arranged on the path of the second inlet and outlet 42, which is connected with the first outlet 32 of the absorption ice making heat supply unit, the first outlet 72 of the high-temperature flue gas and water heat exchange device;

The twelfth valve 12 is disposed on the path of the high temperature flue gas and water heat exchange device first inlet 71 connected to the return water pipe 300, and the eleventh valve 11 is disposed on the path of the high temperature flue gas and water heat exchange device first outlet 72 connected to the water supply pipe 200.

The valves can adopt electromagnetic valves, and are convenient to automatically control.

In one embodiment, as shown in fig. 4, the first power generation device 20 further includes a cylinder liner hot water outlet 23, a cylinder liner hot water inlet 24, an intercooler water outlet 25, and an intercooler water inlet 26, the absorption type ice making and heating unit 30 further includes an absorption type ice making and heating unit fourth inlet 37, an absorption type ice making and heating unit fourth outlet 38, the cylinder liner hot water outlet 23 is connected to the absorption type ice making and heating unit fourth inlet 37, the cylinder liner hot water inlet 24 is connected to the absorption type ice making and heating unit fourth outlet 38, and the intercooler water outlet 25 and the intercooler water inlet 26 are connected to other heat exchangers.

The heat of the hot water of the cylinder liner can also be used to drive ice making. The intercooling water is used for cooling the lubricating oil in the first power generation device 20, and the intercooling water discharged from the intercooling water outlet 25 has a higher temperature and can be input into other heat exchangers for supplying heat to the outside.

In one embodiment, the first power generation device 20 is a gas turbine, or a gas-steam combined cycle generator, or an internal combustion engine, or an external combustion engine, or a fuel cell.

In one embodiment, the absorption ice-making and heating unit 30 is of a smoke-driven type, or a smoke and hot water mixed-driven type, or a smoke and hot water and electric mixed-driven type. The absorption ice-making and heat-supplying unit 30 may not make ice and only discharge cold water.

In one embodiment, the heat exchanger 60 is a conventional heat exchanger, or a large temperature difference heat exchanger, or a two-type heat pump heat exchanger.

In one embodiment, the low temperature flue gas and water heat exchange device 80 is a solid wall heat exchanger, or a direct contact heat exchanger, or a spray tower.

In one embodiment, the system comprises a plurality of cross-season cold and hot storage devices 40 connected in series or parallel;

or the cold-hot combined storage device 40 comprises N small chambers, N is a natural number which is more than or equal to 2, the N small chambers are connected in parallel, cold accumulation is carried out after heat release of any small chamber is finished, and heat supply is carried out on other small chambers.

The cross-season cold and hot combined storage device 40 is not limited to the 2 inlets and outlets shown in the drawings, and the number of the inlets and the outlets can be adjusted, so long as the implementation function is the same as that of the application, the cross-season cold and hot combined storage device belongs to the protection scope of the patent, and for example, the number of the inlets and the outlets can be more than 2.

The cold and hot combined storage device 40 can solve the problem that the ice slurry can not be conveyed because the ice slurry is layered to form an ice-rich layer after the ice is stored in the large ice storage tank in a cross-season mode, and can realize uniform and continuous conveying of the ice slurry in the large ice storage tank. The ice storage device comprises an ice storage tank, an ice conveying pipe, a water return pipe, an agitator, an ice taking device and an ice mixing device, wherein the ice storage tank comprises an ice slurry area and a standing area, the ice slurry area is communicated with the bottom of the standing area, the ice conveying pipe and the water return pipe are respectively connected with the ice slurry area and the standing area, the agitator is arranged in the ice slurry area, the ice taking device is arranged at the upper part of the standing area, the agitator mixes solid ice and water into ice slurry, the concentration of the ice slurry is adjusted, and the ice taking device is used for conveying the solid ice in the standing area to the ice slurry area.

The above-mentioned respective constituent devices, for example, the first power generation device 20, the absorption ice-making and heat-supplying unit 30, the first electric refrigerator 50, the heat exchanger 60, the high-temperature flue gas and water heat exchange device 70, the low-temperature flue gas and water heat exchange device 80, the electric heat pump 90, the first electric refrigerator 100, and the third electric refrigerator 110, may be referred to the prior art, and the internal structures of these devices will not be described in detail herein. The interfaces on these devices communicate with single or multiple functional components within the device to perform various functions such as heating, cooling, transporting, etc. of the medium, and the working principle thereof will be well understood by those skilled in the art after understanding the specific structure of the device.

Example 2

The present embodiment provides a winter heating method implemented by the ice-cold thermoelectric energy supply system described in embodiment 1, and the winter mode achieves the function that ① uses heat in the cross-season cold and heat combined storage device 40 for heat supply at the same time, and after the heat is supplied, the heat is used for storing the cold produced by the absorption ice-making heat supply unit 30. ② By using the absorption ice-making heat supply unit 30, the phase-change heat is deeply extracted from the water, the flue gas waste heat or electricity used for driving and the phase-change heat extracted from the water are used for supplying heat, free ice slurry or cold water is obtained at the same time, the obtained ice slurry or cold water is stored in the cross-season cold-heat combined storage device 40 (cold storage in this time), and the cold energy is stored until the cold energy is supplied in summer for cooling and then used for air conditioning for cooling.

As shown in FIG. 1, the initial state before winter heating is that the hot water at high temperature is in the cold and hot combined storage device 40 in a cross-season mode, the temperature is 90-95 ℃, and all valves are in a closed state;

Heating is started in winter, including:

the heat exchanger 60 is in a heating mode under the first working condition;

The first valve 1, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are opened, high-temperature hot water enters the second inlet 63 of the heat exchanger 60 from the second inlet 42 through the fifth valve 5 and the first valve 1, flows out from the second outlet 64 of the heat exchanger, and enters the first inlet 41 through the sixth valve 6 and the seventh valve 7;

The backwater of the backwater pipeline 300 enters the first inlet 61 of the heat exchanger 60, flows out from the first outlet 62 of the heat exchanger and is fed into the water supply pipeline 200 after being heated, and supplies heat to the outside;

after the heat is discharged from the cross-season cold and hot combined storage device 40, the first valve 1, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are all closed.

In one embodiment, as shown in fig. 2, further comprising:

The second working condition is a mode that the heat exchanger 60 and the second electric refrigerator 100 supply heat simultaneously;

the first valve 1, the third valve 3, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are opened, high-temperature hot water enters the heat exchanger second inlet 63 of the heat exchanger 60 from the second inlet and outlet 42 through the fifth valve 5 and the first valve 1, flows out from the heat exchanger second outlet 64, enters the second electric refrigerator second inlet 103 through the third valve 3, flows out from the second electric refrigerator second outlet 104, and enters the first inlet and outlet 41 through the sixth valve 6 and the seventh valve 7;

the backwater of the backwater pipeline 300 enters the first inlet 101 of the second electric refrigerator 100, and after being heated, flows out from the first outlet 102 of the second electric refrigerator and is fed into the water supply pipeline 200 to supply heat to the outside;

after the heat is discharged from the cross-season cold and hot combined storage device 40, the first valve 1, the third valve 3, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are all closed.

The second valve 2 and the fourth valve 4 can control and change the series connection and parallel connection states between the heat exchanger 60 and the second electric refrigerator 100. When the second valve 2 and the fourth valve 4 are both closed, the heat exchanger 60 and the second electric refrigerator 100 are in series connection, and when the second valve 2 and the fourth valve 4 are both open, the heat exchanger 60 and the second electric refrigerator 100 are in parallel connection.

In one embodiment, further comprising:

The third working condition is that the cold accumulation of the cross-season cold and heat combined storage device 40 is performed, and the system heat supply mode is performed, the cross-season cold and heat combined storage device 40 starts to realize the cold accumulation function, the absorption ice making heat supply unit 30 starts to supplement cold for the cross-season cold and heat combined storage device 40, and simultaneously the first electric refrigerator 50, the high-temperature flue gas and water heat exchange device 70 and the electric heat pump 90 supply heat to the outside;

The cold and hot combined storage device 40 is cold water with the temperature of 1-10 ℃, the seventh valve 7, the eighth valve 8 and the ninth valve 9 are opened, the cold water enters the second inlet 33 of the absorption type ice making and heating unit 30 from the first inlet and outlet 41 through the seventh valve 7 and the ninth valve 9, after being cooled, flows out from the second outlet 34 of the absorption type ice making and heating unit, enters the second inlet and outlet 42 through the eighth valve 8, and stores cold water or ice slurry into the cold and hot combined storage device 40 with the temperature of 1-10 ℃, the second outlet 34 of the absorption type ice making and heating unit can be directly connected with the outside, and the produced ice can be directly taken away for other occasions, such as cold chain selling;

Meanwhile, the first power generation device 20, the first electric refrigerator 50, the high-temperature flue gas and water heat exchange device 70, the low-temperature flue gas and water heat exchange device 80 and the electric heat pump 90 are all in an operation state, and backwater of the backwater pipeline 300 respectively enters the first electric refrigerator 50, the high-temperature flue gas and water heat exchange device 70 and the electric heat pump 90, and after being heated, respectively flows out and is fed into the water supply pipeline 200 to supply heat to the outside.

In one embodiment, further comprising:

Working condition four is that the cross-season cold and heat combined storage device 40 comprises N small chambers, N is a natural number which is more than or equal to 2, the N small chambers are connected in parallel, cold accumulation is carried out after heat release of any small chamber is finished, and heat is supplied by other small chambers.

The initial investment is reduced by:

The system heat supply quantity has two parts, one part is to deeply supply heat by using the absorption ice making heat supply unit 30, the other part is to supply heat by using heat stored by the cross-season cold and heat combined storage device 40, and the peak load of heat supply by using the top of the cross-season cold and heat combined storage device 40 is used when the system is configured, so that the installation and matching cost of a heat supply source are reduced. If the conventional heat supply is a gas boiler, the cost (heat and gas cooperation) of the infrastructure set such as the investment of the gas boiler, the matched gas source-gas network-gas pressure regulating station and the like is saved, and if the conventional heat supply is the cogeneration or the heat pump, the cost (heat and electricity cooperation) of the infrastructure set such as the investment of the cogeneration and the electric heat pump, the matched power supply-power grid-power transformation and the like is saved.

Seasonal peak shaving functions are manifested in:

In winter, some of the total heat supply amount is that heat from room air conditioners stored in summer by the cold and hot combined storage device 40 is supplied in the summer, which is equivalent to reduction of the total heat supply amount in winter. In the operation mode, the peak heat load of the stored hot top heat supply (for the severe cold period heat supply) is equivalent to the reduction of the peak heat supply amount. The heat required in the severe cold stage is high, the heat at the time is high-value heat, and when compared with the heat supply of fuel gas, the heat is equivalent to the most expensive natural gas saved in the severe cold stage, and the peak regulation of the fuel gas is realized, so that the cooperation of heat and gas is realized. In the future, the power supply is in a shortage in winter on the future power grid, and the heat supply quantity is reduced by heat release across seasons, so that the cogeneration can generate more power, and the seasonal peak shaving of the power grid is realized, so that the thermoelectric cooperation is realized. (peak of heat supply is cut by itself, peak is regulated by fuel gas, peak is regulated by electric power.)

Example 3

The embodiment provides a summer refrigeration method, which is implemented by the ice-cold thermoelectric energy supply system in the embodiment 1, wherein the water supply of a heat supply network realizes a cold water supply function, and the return water of the heat supply network realizes a return water return system at the user. ① The cold energy stored in the cross-season cold and heat combined storage device 40 is discharged, and the cold energy is obtained in winter for air conditioner cold supply, so that the total energy consumption for cold supply can be greatly reduced, and the investment of power generation installation, power transmission and distribution and the investment of electric refrigeration equipment of a power grid are independently increased due to the cold supply of the cold energy. When the cold present is insufficient to meet the total cold, conventional electric refrigeration can be supplemented to meet the total demand. ② After the cold energy of the cross-season cold and heat combined storage device 40 is released, the absorption type ice making and heat supplying unit 30 absorbs heat radiated from the room air conditioner, stores the heat into the cross-season cold and heat combined storage device 40 (heat storage at this time), and stores the stored heat until a heating period for supplying heat.

As shown in FIG. 1, the initial state before summer cooling is that the cold and hot combined storage device 40 is ice slurry or ice water mixture, the temperature is 0 ℃, and all valves are in a closed state;

The cooling is started in summer, which comprises the following steps:

the first working condition is that the heat exchanger 60 supplies cold;

The first valve 1, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are opened, ice slurry or cold water enters the second inlet 63 of the heat exchanger 60 from the second inlet 42 through the fifth valve 5 and the first valve 1, flows out from the second outlet 64 of the heat exchanger, and enters the first inlet 41 through the sixth valve 6 and the seventh valve 7;

the backwater of the backwater pipeline 300 enters the first inlet 61 of the heat exchanger 60, and after being cooled, flows out from the first outlet 62 of the heat exchanger and is sent into the water supply pipeline 200 to refrigerate the outside;

After the cold and hot combined storage device 40 is cooled, the first valve 1, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are all closed.

In one embodiment, as shown in fig. 2, further comprising:

the second working condition is a mode that the heat exchanger 60 and the second electric refrigerator 100 supply cold simultaneously;

The first valve 1, the third valve 3, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are opened, ice slurry or cold water enters the heat exchanger second inlet 63 of the heat exchanger 60 from the second inlet and outlet 42 through the fifth valve 5 and the first valve 1, flows out from the heat exchanger second outlet 64, enters the second electric refrigerator second inlet 103 through the third valve 3, flows out from the second electric refrigerator second outlet 104, and enters the first inlet and outlet 41 through the sixth valve 6 and the seventh valve 7;

The backwater of the backwater pipeline 300 enters the first inlet 101 of the second electric refrigerator 100, and after being cooled, flows out from the first outlet 102 of the second electric refrigerator and is sent into the water supply pipeline 200, and is cooled to the outside;

After the cold and hot combined storage device 40 is cooled, the first valve 1, the third valve 3, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are all closed.

In one embodiment, as shown in fig. 3, further comprising:

The third working condition is that the cross-season cold and heat combined storage device 40 stores heat and the system supplies cold, the cross-season cold and heat combined storage device 40 starts to realize the heat storage function, the absorption ice-making heat supply unit 30 starts to supplement heat to the cross-season cold and heat combined storage device 40, and the third electric refrigerator 110 supplies cold to the outside;

The seventh valve 7, the tenth valve 10 and the fifteenth valve 15 are opened, water enters the first inlet 31 of the absorption type ice making and heating unit 30 from the first inlet 41 through the seventh valve 7 and the fifteenth valve 15, and after being heated, flows out from the first outlet 32 of the absorption type ice making and heating unit, and enters the first inlet 42 through the tenth valve 10;

water enters the first inlet 71 of the high-temperature flue gas and water heat exchange device 70 from the first inlet 41 through the seventh valve 7 and the fifteenth valve 15, flows out from the first outlet 72 of the high-temperature flue gas and water heat exchange device after being heated, and enters the first inlet 42 through the tenth valve 10;

cold water in the absorption ice-making and heating unit 30 flows out from the second outlet 34 of the absorption ice-making and heating unit, enters the first inlet 111 of the third electric refrigerator 110, flows out from the first outlet 112 of the third electric refrigerator, and enters the second inlet 33 of the absorption ice-making and heating unit;

The backwater of the backwater pipeline 300 enters the first inlet 113 of the third electric refrigerator 110, and after being cooled, flows out from the first outlet 114 of the third electric refrigerator and is sent into the water supply pipeline 200 to refrigerate the outside;

After the heat accumulation of the cross-season cold and hot combined storage device 40 is finished, the seventh valve 7, the tenth valve 10 and the fifteenth valve 15 are all closed.

When the system is externally cooled, the low-temperature flue gas and water heat exchange device 80 and the electric heat pump 90 are in a stop state, so that the second outlet 74 of the high-temperature flue gas and water heat exchange device 70 can be directly communicated with the atmosphere, and the flue gas is directly emptied from the second outlet 74 of the high-temperature flue gas and water heat exchange device without passing through the low-temperature flue gas and water heat exchange device 80.

In one embodiment, further comprising:

And under the fourth working condition, the cross-season cold and heat combined storage device 40 stores heat and the system supplies cold, the cross-season cold and heat combined storage device 40 starts to realize the heat storage function, the absorption ice making and heat supplying unit 30 starts to supplement heat to the cross-season cold and heat combined storage device 40, and the first electric refrigerator 50 or the second electric refrigerator 100 supplies cold to the outside.

In this case, the third electric refrigerator 110 may not be provided, and a separate cooling energy transmission path may be required between the first electric refrigerator 50, the second electric refrigerator 100, and the absorption ice-making and heat-supplying unit 30, and reference may be made to the cooling energy transmission path between the third electric refrigerator 110 and the absorption ice-making and heat-supplying unit 30.

The initial investment is reduced by:

the system has two parts of cold supply, one part is used for cooling by the absorption ice making and heat supplying unit 30, the other part is used for cooling by the cross-season cold and heat combined storage device 40, and the system uses peak cold load of the cold top stored by the cross-season cold and heat combined storage device 40, so that the installation and matched cost of the cold source are greatly reduced (the cost of the infrastructure of an electric refrigerator, a matched power supply, a power grid, a power transformation and the like is saved).

Seasonal peak shaving functions are manifested in:

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. An ice-cooling heat and power supply system, characterized by comprising a first power generation device (20), an absorption ice-making and heating unit (30), a cross-seasonal cold and heat storage device (40), a heat exchanger (60), a water supply pipeline (200), and a return water pipeline (300), wherein a medium flows through the water supply pipeline (200) and the return water pipeline (300);

The high-temperature flue gas generated by the first power generation device (20) is input into the absorption ice-making and heating unit (30) for heat exchange, the absorption ice-making and heating unit (30) transfers heat energy/cold energy to the inter-seasonal cold and heat storage device (40), and the inter-seasonal cold and heat storage device (40) transfers heat energy/cold energy to the heat exchanger (60). The water supply pipeline (200) and the return water pipeline (300) are both connected to the heat exchanger (60), and the heat exchanger (60) outputs heat energy/cold energy to the outside through the water supply pipeline (200);

The cross-seasonal cold and heat storage device (40) includes a first inlet and outlet (41) and a second inlet and outlet (42); the heat exchanger (60) includes a first inlet and outlet (61) of the heat exchanger, a first outlet and outlet (62) of the heat exchanger, a second inlet and outlet (63) of the heat exchanger, and a second outlet and outlet (64) of the heat exchanger; and the absorption ice-making and heating unit (30) also includes a second inlet and outlet (33) of the absorption ice-making and heating unit and a second outlet (34) of the absorption ice-making and heating unit.

The first inlet and outlet (41) are respectively connected to the second inlet (33) of the absorption ice-making and heating unit and the second outlet (64) of the heat exchanger; the second inlet and outlet (42) are respectively connected to the second outlet (34) of the absorption ice-making and heating unit and the second inlet (63) of the heat exchanger;

The first inlet (61) of the heat exchanger is connected to the return water pipeline (300), and the first outlet (62) of the heat exchanger is connected to the water supply pipeline (200);

The first electric refrigerator (50) further comprises a first electric refrigerator (50), wherein the first electric refrigerator (50) comprises a first inlet (51) of the first electric refrigerator, a first outlet (52) of the first electric refrigerator, a second inlet (53) of the first electric refrigerator, and a second outlet (54) of the first electric refrigerator; the first power generation device (20) comprises a fuel inlet (21) and a flue gas outlet (22); and the absorption ice-making and heating unit (30) comprises a first inlet (31) of the absorption ice-making and heating unit, a first outlet (32) of the absorption ice-making and heating unit, a third inlet (35) of the absorption ice-making and heating unit, and a third outlet (36) of the absorption ice-making and heating unit;

Fuel enters the first power generation device (20) from the fuel inlet (21), and the generated high-temperature flue gas is discharged from the flue gas outlet (22), and the flue gas outlet (22) is connected to the third inlet (35) of the absorption ice-making and heating unit;

The first inlet (51) of the first electric refrigerator is connected to the return water pipeline (300), the first outlet (52) of the first electric refrigerator is connected to the water supply pipeline (200), the second inlet (53) of the first electric refrigerator is connected to the first outlet (32) of the absorption ice-making and heating unit, and the second outlet (54) of the first electric refrigerator is connected to the first inlet (31) of the absorption ice-making and heating unit;

The high-temperature flue gas and water heat exchange device (70) further comprises a high-temperature flue gas and water heat exchange device (70), the high-temperature flue gas and water heat exchange device (70) comprising a first inlet (71) of the high-temperature flue gas and water heat exchange device, a first outlet (72) of the high-temperature flue gas and water heat exchange device, a second inlet (73) of the high-temperature flue gas and water heat exchange device, and a second outlet (74) of the high-temperature flue gas and water heat exchange device, the first inlet (71) of the high-temperature flue gas and water heat exchange device being connected to the return water pipeline (300), the first outlet (72) of the high-temperature flue gas and water heat exchange device being connected to the water supply pipeline (200), and the second inlet (73) of the high-temperature flue gas and water heat exchange device being connected to the third outlet (36) of the absorption ice-making and heating unit;

It also includes a low-temperature flue gas and water heat exchange device (80) and an electric heat pump (90), wherein the low-temperature flue gas and water heat exchange device (80) includes a first inlet (81) of the low-temperature flue gas and water heat exchange device, a first outlet (82) of the low-temperature flue gas and water heat exchange device, a second inlet (83) of the low-temperature flue gas and water heat exchange device, and a second outlet (84) of the low-temperature flue gas and water heat exchange device, and the electric heat pump (90) includes a first inlet (91) of the electric heat pump, a first outlet (92) of the electric heat pump, a second inlet (93) of the electric heat pump, and a second outlet (94) of the electric heat pump;

The first inlet (91) of the electric heat pump is connected to the return water pipeline (300), the first outlet (92) of the electric heat pump is connected to the water supply pipeline (200), the second inlet (93) of the electric heat pump is connected to the first outlet (82) of the low-temperature flue gas and water heat exchange device, and the second outlet (94) of the electric heat pump is connected to the first inlet (81) of the low-temperature flue gas and water heat exchange device;

The second inlet (83) of the low-temperature flue gas and water heat exchange device is connected to the second outlet (74) of the high-temperature flue gas and water heat exchange device, and the second outlet (84) of the low-temperature flue gas and water heat exchange device is connected to the atmosphere;

The second electric refrigerator (100) further comprises a second electric refrigerator (100), wherein the second electric refrigerator (100) comprises a first inlet (101) of the second electric refrigerator, a first outlet (102) of the second electric refrigerator, a second inlet (103) of the second electric refrigerator, and a second outlet (104) of the second electric refrigerator, wherein the first inlet (101) of the second electric refrigerator is connected to the return water pipeline (300), the first outlet (102) of the second electric refrigerator is connected to the water supply pipeline (200), the second inlet (103) of the second electric refrigerator is connected to the second outlet (64) of the heat exchanger, and the second outlet (104) of the second electric refrigerator is connected to the first inlet and outlet (41);

A straight pipeline is connected between the second inlet (63) of the heat exchanger and the second outlet (64) of the heat exchanger, and a straight pipeline is connected between the second inlet (103) of the second electric refrigerator and the second outlet (104) of the second electric refrigerator;

The third electric refrigerator (110) further comprises a third electric refrigerator (110), the third electric refrigerator (110) comprising a first inlet (111) of the third electric refrigerator, a first outlet (112) of the third electric refrigerator, a second inlet (113) of the third electric refrigerator, and a second outlet (114) of the third electric refrigerator, wherein the first inlet (111) of the third electric refrigerator is connected to the second outlet (34) of the absorption ice-making and heating unit, the first outlet (112) of the third electric refrigerator is connected to the second inlet (33) of the absorption ice-making and heating unit, the second inlet (113) of the third electric refrigerator is connected to the return water pipeline (300), and the second outlet (114) of the third electric refrigerator is connected to the water supply pipeline (200);

The first inlet and outlet (41) are respectively connected to the first inlet (31) of the absorption ice-making and heating unit and the first inlet (71) of the high-temperature flue gas and water heat exchange device, and the second inlet and outlet (42) are respectively connected to the first outlet (32) of the absorption ice-making and heating unit and the first outlet (72) of the high-temperature flue gas and water heat exchange device.

2. The ice-cold thermoelectric energy supply system according to claim 1, characterized in that the first inlet and outlet (41) is provided with a seventh valve (7), and the second inlet (63) of the heat exchanger is provided with a first valve (1);

A ninth valve (9) is provided on the path connecting the first inlet (41) to the second inlet (33) of the absorption ice-making and heating unit, and a sixth valve (6) is provided on the path connecting the first inlet (41) to the second outlet (64) of the heat exchanger.

An eighth valve (8) is provided on the path connecting the second inlet (42) to the second outlet (34) of the absorption ice-making and heating unit, and a fifth valve (5) is provided on the path connecting the second inlet (63) of the heat exchanger.

A second valve (2) is provided on the straight pipeline between the second inlet (63) of the heat exchanger and the second outlet (64) of the heat exchanger.

3. The ice-cold thermoelectric energy supply system according to claim 2, characterized in that the second inlet (103) of the second electric refrigerator is provided with a third valve (3);

The sixth valve (6) is also located on a path connecting the first inlet and outlet (41) to the second outlet (104) of the second electric refrigerator;

The fifth valve (5) is also located on the path where the second inlet (42) is connected to the second inlet (103) of the second electric refrigerator;

A fourth valve (4) is provided on the straight-through pipeline between the second inlet (103) of the second electric refrigerator and the second outlet (104) of the second electric refrigerator.

4. The ice-cold thermoelectric energy supply system according to claim 3, characterized in that the second inlet (53) of the first electric refrigerator is provided with a fourteenth valve (14), and the second outlet (54) of the first electric refrigerator is provided with a thirteenth valve (13);

A fifteenth valve (15) is provided on a path where the first inlet (41) is connected to the first inlet (31) of the absorption ice-making and heating unit and the first inlet (71) of the high-temperature flue gas and water heat exchange device, and a tenth valve (10) is provided on a path where the second inlet (42) is connected to the first outlet (32) of the absorption ice-making and heating unit and the first outlet (72) of the high-temperature flue gas and water heat exchange device;

A twelfth valve (12) is provided on the path where the first inlet (71) of the high-temperature flue gas and water heat exchange device is connected to the return water pipeline (300), and an eleventh valve (11) is provided on the path where the first outlet (72) of the high-temperature flue gas and water heat exchange device is connected to the water supply pipeline (200).

5. The ice-cold thermoelectric energy supply system according to claim 1, characterized in that the first power generation device (20) further comprises a cylinder jacket hot water outlet (23), a cylinder jacket hot water inlet (24), an intermediate cold water outlet (25), and an intermediate cold water inlet (26); the absorption ice-making and heating unit (30) further comprises an absorption ice-making and heating unit fourth inlet (37) and an absorption ice-making and heating unit fourth outlet (38); the cylinder jacket hot water outlet (23) is connected to the absorption ice-making and heating unit fourth inlet (37), the cylinder jacket hot water inlet (24) is connected to the absorption ice-making and heating unit fourth outlet (38), and the intermediate cold water outlet (25) and the intermediate cold water inlet (26) are connected to other heat exchangers.

6. The ice-cold thermal power supply system according to claim 1, characterized in that the first power generation device (20) is a gas turbine, or a gas-steam combined cycle generator, or an internal combustion engine, or an external combustion engine, or a fuel cell;

The absorption ice-making and heating unit (30) is a flue gas driven type, a flue gas and hot water mixed driven type, or a flue gas, hot water and electricity mixed driven type.

7. The ice-cold heat and power energy supply system according to claim 1, characterized in that it comprises a plurality of said cross-seasonal cold and heat storage devices (40) connected in series or in parallel;

Alternatively, the cross-seasonal cold and heat storage device (40) includes N small chambers, N is a natural number ≥ 2, and the N small chambers are connected in parallel or in series.

8. The ice-cold thermoelectric energy supply system according to claim 1, characterized in that:

The low-temperature flue gas and water heat exchange device (80) is a solid wall heat exchanger, or a direct contact heat exchanger, or a spray tower.

9. A winter heating method, characterized in that it is implemented by the ice-cold thermoelectric energy supply system according to claim 4, and the initial state before winter heating is: the cross-seasonal cold and heat storage device (40) contains high-temperature hot water at a temperature of 90°C-95°C, and all valves are in a closed state;

Heating starts in winter, including:

Working condition 1: heat exchanger (60) heating mode;

The first valve (1), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are opened, and the high-temperature hot water flows from the second inlet (42) through the fifth valve (5) and the first valve (1) into the second inlet (63) of the heat exchanger (60), flows out from the second outlet (64) of the heat exchanger, passes through the sixth valve (6) and the seventh valve (7), and enters the first inlet (41);

Return water from the return water pipeline (300) enters the first inlet (61) of the heat exchanger (60), is heated, and then flows out from the first outlet (62) of the heat exchanger and is sent to the water supply pipeline (200) to supply heat to the outside.

After the inter-seasonal cold and heat storage device (40) has released all the heat, the first valve (1), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are all closed.

10. The winter heating method according to claim 9, further comprising:

Working condition 2: the heat exchanger (60) and the second electric refrigerator (100) are in heating mode at the same time;

The first valve (1), the third valve (3), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are opened, and the high-temperature hot water flows from the second inlet (42) through the fifth valve (5) and the first valve (1) into the second inlet (63) of the heat exchanger (60), flows out from the second outlet (64) of the heat exchanger, passes through the third valve (3), enters the second inlet (103) of the second electric refrigerator, flows out from the second outlet (104) of the second electric refrigerator, passes through the sixth valve (6) and the seventh valve (7), and enters the first inlet (41);

Return water from the return water pipeline (300) enters the first inlet (101) of the second electric refrigerator (100), is heated, and then flows out from the first outlet (102) of the second electric refrigerator and is sent to the water supply pipeline (200) to supply heat to the outside.

After the inter-seasonal cold and heat storage device (40) has released all the heat, the first valve (1), the third valve (3), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are all closed.

11. The winter heating method according to claim 10, further comprising:

Working condition three: the inter-seasonal cold and heat storage device (40) stores cold and the system supplies heat at the same time. The inter-seasonal cold and heat storage device (40) starts to realize the cold storage function, and the absorption ice-making heating unit (30) starts to supplement the cold to the inter-seasonal cold and heat storage device (40). At the same time, the first electric refrigerator (50), the high-temperature flue gas and water heat exchange device (70), and the electric heat pump (90) supply heat to the outside.

The inter-seasonal cold and heat storage device (40) contains low-temperature water with a temperature of 1°C-10°C. The seventh valve (7), the eighth valve (8), and the ninth valve (9) are opened. The low-temperature water flows from the first inlet (41) through the seventh valve (7) and the ninth valve (9) into the second inlet (33) of the absorption ice-making and heating unit (30). After being cooled, the water flows out from the second outlet (34) of the absorption ice-making and heating unit and enters the second inlet (42) through the eighth valve (8). The cold water or ice slurry is stored in the inter-seasonal cold and heat storage device (40).

At the same time, the first power generation device (20), the first electric refrigerator (50), the high-temperature flue gas and water heat exchange device (70), the low-temperature flue gas and water heat exchange device (80), and the electric heat pump (90) are all in operation, and the return water of the return water pipeline (300) enters the first electric refrigerator (50), the high-temperature flue gas and water heat exchange device (70), and the electric heat pump (90) respectively, and after being heated, flows out and is sent to the water supply pipeline (200) to supply heat to the outside.

12. The winter heating method according to claim 11, further comprising:

Working condition 4: The cross-seasonal cold and heat storage device (40) includes N small chambers, where N is a natural number ≥ 2. The N small chambers are connected in parallel. When any one small chamber has finished releasing heat, it will store cold, while the other small chambers will supply heat.

13. A summer cooling method, characterized in that it is implemented by the ice-cold thermoelectric energy supply system according to claim 4, and the initial state before summer cooling is: the cross-seasonal cold and heat storage device (40) contains ice slurry or ice-water mixture, the temperature is 0°C, and all valves are in a closed state;

Cooling starts in summer, including:

Working condition 1: heat exchanger (60) cooling mode;

The first valve (1), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are opened, and the ice slurry or cold water flows from the second inlet (42) through the fifth valve (5) and the first valve (1) into the second inlet (63) of the heat exchanger (60), flows out from the second outlet (64) of the heat exchanger, and flows through the sixth valve (6) and the seventh valve (7) into the first inlet (41);

The return water from the return water pipeline (300) enters the first inlet (61) of the heat exchanger (60), is cooled, and then flows out from the first outlet (62) of the heat exchanger and is sent to the water supply pipeline (200) to provide external cooling.

After the inter-seasonal cold and heat storage device (40) has finished discharging cold, the first valve (1), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are all closed.

14. The summer cooling method according to claim 13, further comprising:

Working condition 2: the heat exchanger (60) and the second electric refrigerator (100) provide cooling at the same time;

The first valve (1), the third valve (3), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are opened, and the ice slurry or cold water flows from the second inlet (42) through the fifth valve (5) and the first valve (1) into the second inlet (63) of the heat exchanger (60), flows out from the second outlet (64) of the heat exchanger, passes through the third valve (3), enters the second inlet (103) of the second electric refrigerator, flows out from the second outlet (104) of the second electric refrigerator, passes through the sixth valve (6) and the seventh valve (7), and enters the first inlet (41);

Return water from the return water pipeline (300) enters the first inlet (101) of the second electric refrigerator (100), is cooled, and then flows out from the first outlet (102) of the second electric refrigerator and is sent to the water supply pipeline (200) for external cooling.

After the inter-seasonal cold and heat storage device (40) has finished discharging cold, the first valve (1), the third valve (3), the fifth valve (5), the sixth valve (6), and the seventh valve (7) are all closed.

15. The summer cooling method according to claim 14, further comprising:

Working condition three: the inter-seasonal cold and heat storage device (40) stores heat while the system provides cooling. The inter-seasonal cold and heat storage device (40) starts to realize the heat storage function, the absorption ice-making and heating unit (30) starts to supplement heat to the inter-seasonal cold and heat storage device (40), and the third electric refrigerator (110) provides cooling to the outside.

The seventh valve (7), the tenth valve (10), and the fifteenth valve (15) are opened, and water flows from the first inlet (41) through the seventh valve (7) and the fifteenth valve (15) into the first inlet (31) of the absorption ice-making and heating unit (30), is heated, and then flows out from the first outlet (32) of the absorption ice-making and heating unit, and flows through the tenth valve (10) into the first inlet (42);

Water enters the first inlet (71) of the high-temperature flue gas and water heat exchange device (70) through the seventh valve (7) and the fifteenth valve (15) from the first inlet (41), is heated, and then flows out from the first outlet (72) of the high-temperature flue gas and water heat exchange device, passes through the tenth valve (10), and enters the first inlet (42);

The cold water in the absorption ice-making and heating unit (30) flows out from the second outlet (34) of the absorption ice-making and heating unit, enters the first inlet (111) of the third electric refrigerator (110), flows out from the first outlet (112) of the third electric refrigerator, and enters the second inlet (33) of the absorption ice-making and heating unit;

Return water from the return water pipeline (300) enters the first inlet (113) of the third electric refrigerator (110), is cooled, and then flows out from the first outlet (114) of the third electric refrigerator and is sent to the water supply pipeline (200) for external cooling.

After the inter-seasonal cold and heat storage device (40) has completed heat storage, the seventh valve (7), the tenth valve (10), and the fifteenth valve (15) are all closed.

16. The summer cooling method according to claim 14, further comprising:

Working condition 4: The inter-seasonal cold and heat storage device (40) stores heat while the system provides cooling. The inter-seasonal cold and heat storage device (40) starts to realize the heat storage function, and the absorption ice-making and heating unit (30) starts to supplement heat to the inter-seasonal cold and heat storage device (40). At the same time, the first electric refrigerator (50) or the second electric refrigerator (100) provides cooling to the outside.