CN217877265U - Wind-solar natural cold-heat collaborative integrated seasonal energy storage system - Google Patents
Wind-solar natural cold-heat collaborative integrated seasonal energy storage system Download PDFInfo
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- CN217877265U CN217877265U CN202221599267.3U CN202221599267U CN217877265U CN 217877265 U CN217877265 U CN 217877265U CN 202221599267 U CN202221599267 U CN 202221599267U CN 217877265 U CN217877265 U CN 217877265U
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Abstract
The utility model discloses a season energy storage system is striden in integration of scene natural cold and hot in coordination, include: the system comprises a solid electric heat storage boiler, a water source heat pump, a heat exchanger, a cross-season thermocline energy storage device, an energy storage circulating pump, an energy supply circulating pump, an energy storage circulating pipeline, an energy supply circulating pipeline and an adjusting valve group, wherein the energy supply circulating pipeline is connected with a tail-end cold and heat demand user, and the energy supply circulating pipeline is communicated with the heat exchanger, the water source heat pump, the solid electric heat storage boiler and the energy supply circulating pump in sequence from a tail-end water return side; the energy storage circulating pipeline is connected with the cross-season thermocline energy storage device and sequentially passes through the energy storage circulating pump, the heat exchanger, the water source heat pump and the other side of the solid electric heat storage boiler. The utility model provides the high utilization efficiency who strides energy memory in season has with the volume energy storage higher, with the design load volume littleer advantage, has reduced the circulation system investment effectively and has improved economic nature, changes in maintenance, maintenance and change in production fortune dimension.
Description
Technical Field
The utility model relates to a stride cold heat-retaining technical field of season, specifically be a season energy storage system is striden in integration in coordination of scene nature cold and hot.
Background
For coping with the fluctuation caused by new energy grid-connected power generation, the heat storage and cold storage technology has strong regulating capacity and independent supply capacity, and is widely applied to energy storage at a power supply side and a user side. However, in addition to industrial heat and domestic hot water supply, the most important heat utilization terminals are central heating in northern cities and central cooling in southern cities, and both heating and cooling have strong seasonality, and the cold and hot demands in winter and summer in north and south are difficult to balance.
The mainstream energy storage mode in the market at present is to build an independent single-day energy storage system for heating or cooling, and the utilization hours of equipment are very low comprehensively all year round.
The existing seasonal energy storage system is designed to deal with the discontinuity of wind and light electric energy through a single large-capacity energy storage device, so that the system is started and stopped frequently, the heat storage temperature difference of the system is low, the energy density is not high, the small temperature difference is large, the energy consumption for carrying the water pump is high, the size of the energy storage device is too large, the construction cost is high, and the overall economy is poor.
Therefore, a wind-solar-natural cold-heat cooperative integrated cross-season energy storage system is provided so as to solve the problems.
Disclosure of Invention
An object of the utility model is to provide a wind-light natural cold-hot cooperation integration energy storage system strides season to solve the problem of proposing among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a wind-solar-natural cold-hot cooperative integrated cross-season energy storage system comprises: the system comprises a solid electric heat storage boiler, a water source heat pump, a heat exchanger, a cross-season thermocline energy storage device, an energy storage circulating pump, an energy supply circulating pump, an energy storage circulating pipeline, an energy supply circulating pipeline and an adjusting valve group, wherein the energy supply circulating pipeline is connected with a tail-end cold and heat demand user, and the energy supply circulating pipeline is sent out from a return water side and sequentially communicated with the heat exchanger, the water source heat pump, the solid electric heat storage boiler and the energy supply circulating pump;
the energy storage circulating pipeline is connected with the cross-season thermocline energy storage device and is communicated with the other side of the energy storage circulating pump, the heat exchanger, the water source heat pump and the solid electric heat storage boiler in sequence;
the solid electric heat storage boiler is a system heat source, and the water source heat pump unit is a system cold source;
the solid electric heat storage boiler and the water source heat pump respectively bear the upper and lower temperature limits of the system.
Preferably, the energy storage circulating pipeline and the energy supply circulating pipeline are provided with regulating valve groups.
Preferably, the solid electric heat storage boiler is composed of a resistance wire, a heat storage brick body and a heat release fan, and the heat release fan operates in a frequency conversion mode to regulate and control the heat storage temperature of the cross-season thermocline energy storage device.
Preferably, the cross-season thermocline energy storage device is a shallow buried thermocline reservoir and consists of an energy storage tank, a heat insulation layer and a flow equalizing water distributor.
Preferably, an inlet and an outlet of the seasonal thermocline energy storage device are provided with three-way valve banks, and the three-way valve banks switch working condition modes.
Preferably, the specific working condition mode is that heat in summer is supplied from top to bottom for cold accumulation; the heat is supplied to the upper part and stored in the lower part in winter.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through decoupling of the single-day energy storage device, the cross-season inclined temperature layer energy storage device continuously operates at a uniform flow rate, and the stable and continuous cold and heat storage flow rate can reduce cold and hot water mixing and reduce the thickness of the inclined temperature layer, so that the utilization efficiency of the cross-season energy storage device is improved;
2. the system has the advantages of higher energy storage capacity with the same volume and smaller volume with the same design load compared with the existing cross-season heat storage and cold storage system, effectively reduces the investment of a circulating system and improves the economy;
3. the higher temperature difference enables the system to use extremely low water pump power to carry fluid for energy supply, thereby greatly saving the non-thermal energy consumption of the system and greatly improving the energy storage efficiency of the energy storage system;
4. the solid heat storage boiler is used as a main storage and bottom supporting heat source of the system, the discontinuity of the wind and light abandoning period generated by new energy electric power can be supported by the static heating flexibility of the resistance wire to load reduction, and kinetic energy consumption-free energy is stored into the single-day solid heat storage capacity carried by the solid heat storage boiler, so that the peak shaving of the power grid system is responded. Heat is stably and uniformly exchanged into a high-capacity season-spanning cold and heat energy storage device through frequency conversion adjustment of a heat release fan;
5. the variable frequency fan is responsible for coupling hot blast medium of single day solid heat-retaining with stride the cold and hot water medium of season energy storage, and the complicated demand change of terminal hot user is dealt with as regulation and control part to the system with its lower cost. The fan is not connected to a water system in series, so that the maintenance, the repair and the replacement are easier in production, operation and maintenance, and the energy use safety and the continuity of the system are fully guaranteed;
6. when heating in winter, the system preferentially releases heat stored in summer to perform primary heating, and then further extracts waste heat of return water after the primary heating by using the water source heat pump, and the solid heat storage boiler flexibly increases or decreases load and releases the heat stored in the valley electricity consumed before the release to regulate and control the temperature of heating water. The process utilizes wind and solar power to clean and heat, and simultaneously effectively carries the winter natural cold energy into the cross-season thermocline energy storage device. In the same way, the natural heat is carried into the system while cold is supplied by using cold water stored in winter in summer. The system takes the annual period as wind, light and natural cold and heat multi-energy cooperation, balances the difference of winter and summer load requirements of different regions, and greatly improves the energy efficiency level and the utilization efficiency of the system.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a solid electric heat storage boiler; 2. a water source heat pump; 3. a heat exchanger; 4. a seasonal thermocline energy storage device; 5. an energy storage circulating pump; 6. a circulating pump is powered; 7. an energy storage circulation pipeline; 8. an energy supply circulating pipeline; 9. a flow equalizing water distributor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a wind-solar-natural cold-hot cooperative integrated cross-season energy storage system comprises: the system comprises a solid electric heat storage boiler 1, a water source heat pump 2, a heat exchanger 3, a cross-season thermocline energy storage device 4, an energy storage circulating pump 5, an energy supply circulating pump 6, an energy storage circulating pipeline 7, an energy supply circulating pipeline 8 and an adjusting valve group, wherein the energy supply circulating pipeline 8 is connected with a tail-end cold and heat demand user, and the energy supply circulating pipeline 8 is sequentially communicated with the heat exchanger 3, the water source heat pump 2, the solid electric heat storage boiler 1 and the energy supply circulating pump 6 from a backwater side;
the energy storage circulating pipeline 7 is connected with the cross-season thermocline energy storage device 4 through a pipeline, the energy storage circulating pipeline 7 is communicated with the energy storage circulating pump 5 and the other side of the heat exchanger 3, the water source heat pump 2 and the solid electric heat storage boiler 1 through pipelines in sequence, and the energy storage circulating pipeline 7 and the energy supply circulating pipeline 8 are provided with regulating valve banks for switching and adjusting energy supply in winter and summer of the control system;
the solid electric heat accumulation boiler 1 is used as a system heat source, the solid electric heat accumulation boiler 1 is composed of resistance wires, heat accumulation bricks and a heat release fan, the cross-season inclined temperature layer energy storage device 4 carried by the solid electric heat accumulation boiler can respond to the dispatching of a power grid system in real time and flexibly adjust peaks, the heat accumulation temperature of the cross-season inclined temperature layer energy storage device 4 is regulated and controlled through the variable-frequency operation of the heat release fan, the single-day peak regulation heat energy of the solid electric heat accumulation boiler is utilized in winter to improve the temperature difference between supply and return water of two networks, the power consumption of an auxiliary machine of the two networks is reduced, and the solid electric heat accumulation boiler 1 is used as a bottom supporting heat source to ensure the heat supply quality;
the water source heat pump 2 is used as a system cold source, winter cold water is used as circulating cooling water required by a condenser for cooling in summer, heat energy converted by abandoned electricity is absorbed by the solid electric heat storage boiler 1 for heating to a target heat storage temperature while the temperature is pre-raised by cooling, the working direction of a compressor is switched by the internal circulating valve bank in the water source heat pump 2 to exchange the position of an evaporator of the condenser in winter working conditions, return water waste heat is further utilized in a stepped mode after the tail end is heated, and lower water temperature is stored to provide proper circulating cooling water temperature for cooling in summer.
The solid electric heat storage boiler 1 and the water source heat pump 2 respectively bear upper and lower temperature limits of the system, and the carrying of the heat exchanger 3 can play a role in bearing upper and lower temperature coupling, so that the effect is that non-work-doing energy exchange in the heat releasing and cooling process is realized, and the inlet temperature of the water source heat pump 2 is optimized to enable the water source heat pump to work at the optimal working condition point to improve the efficiency;
stride season thermocline energy memory 4 and bury the thermocline cistern for the shallow layer, stride season thermocline energy memory 4 and constitute by energy storage tank, heat preservation, the water-locator 9 that flow equalizes, stride season thermocline energy memory 4 and import and export and be equipped with the tee bend valves, switch operating mode, concrete mode is summer: supplying heat, storing cold and supplying cold; in winter: the heat supplies cold from the top and stores cold from the bottom.
The working principle is as follows: when wind, light and electricity are abandoned in non-heating and cooling seasons, the solid electric heat storage boiler 1 is switched on to store heat into solid heat storage capacity, and a heat release fan carries out frequency conversion heat release to adjust the temperature of water stored in the cross-season thermocline energy storage device 4;
when electricity is abandoned in a cooling season, the solid electric heat storage boiler 1 is switched on for heat storage in a non-cooling period, the water source heat pump 2 is started in a cooling period, cold water stored in winter is used as circulating cooling water to supply cold for the tail end, and then the cooling water which is heated by the condenser but does not reach a storage target value is heated in a variable frequency mode by the heat release fan;
in the heating season, firstly switching system valves, switching the cross-season thermocline energy storage device 4 to a hot-up-out-cold-down-return mode, switching a condenser evaporator of the water source heat pump 2, switching the solid electric heat storage boiler 1 to a heating circulation pipeline, and opening a heat exchanger 3 valve;
when electricity is abandoned in a heating season, the solid electric heat accumulation boiler 1 is also switched on to accumulate energy and adjust peak;
the hot water is preferentially utilized to carry out primary heat exchange heating in the heating season;
when the temperature supplied by the heat exchanger 3 cannot reach the heating standard, namely the water temperature in the energy storage device is reduced to the return water temperature at the hot end, the water source heat pump 2 is started to further extract the waste heat of the isothermal hot water and prepare lower water temperature at the energy storage side;
when the outlet water temperature of the condenser of the water source heat pump 2 cannot reach the heat supply temperature, the fan of the solid electric heat storage boiler 1 releases the heat stored in the winter electricity abandoning process, and the heat supply temperature is regulated, controlled and guaranteed;
the heat exchanger 3, the water source heat pump 2 and the solid electric heat storage boiler 1 are respectively responsible for respective temperature intervals when the three are supplied together, and the temperature difference value of the energy supply side and the energy storage side which reach the design target is ensured;
the energy storage capacity of the solid electric heat storage boiler 1 can guarantee the heat load requirement of 24 hours of isolated network operation in extremely cold weather, when the heat energy in summer is used up and the new energy is insufficient in output and no electricity is abandoned for a plurality of consecutive days, the solid electric heat storage boiler can also store heat by using local off-peak power, and the heat supply quality is guaranteed by relieving the peak-time pressure of the power grid through thermoelectric decoupling;
the direct heat output heat power of the solid electric heat storage boiler 1 has the capability of independently guaranteeing the heating quality in extremely cold weather.
Those not described in detail in this specification are within the skill of the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A wind-solar-natural cold-hot cooperative integrated cross-season energy storage system comprises: solid electricity heat accumulation boiler (1), water source heat pump (2), heat exchanger (3), stride season thermocline energy memory (4), energy storage circulating pump (5), energy supply circulating pump (6), energy storage circulating pipe (7), energy supply circulating pipe (8), governing valve group, its characterized in that: the energy supply circulating pipeline (8) is connected with a tail-end cold and heat demand user, and the energy supply circulating pipeline (8) is communicated with the heat exchanger (3), the water source heat pump (2), the solid electric heat storage boiler (1) and the energy supply circulating pump (6) from a water return side in sequence;
the energy storage circulating pipeline (7) is connected with the cross-season thermocline energy storage device (4), and the energy storage circulating pipeline (7) is communicated with the energy storage circulating pump (5), the heat exchanger (3), the water source heat pump (2) and the solid electric heat storage boiler (1) in sequence;
the solid electric heat storage boiler (1) is a system heat source, and the water source heat pump (2) unit is a system cold source;
the solid electric heat storage boiler (1) and the water source heat pump (2) respectively bear the upper and lower temperature limits of the system.
2. The wind, light, natural cold and heat cooperative integrated cross-season energy storage system according to claim 1, wherein the energy storage circulating pipeline (7) and the energy supply circulating pipeline (8) are provided with regulating valve groups.
3. The wind, solar and natural cold and heat cooperation integrated seasonal energy storage system according to claim 1, wherein the solid electric heat storage boiler (1) is composed of a resistance wire, a heat storage brick body and a heat release fan, and the heat release fan is operated in a variable frequency mode to regulate and control the heat storage temperature of the seasonal thermocline energy storage device (4).
4. The wind-solar-natural cold-hot cooperative integrated seasonal energy storage system according to claim 1, wherein the seasonal thermocline energy storage device (4) is a shallow buried thermocline reservoir, and the seasonal thermocline energy storage device (4) is composed of an energy storage tank, an insulating layer and a flow equalizing water distributor (9).
5. The wind, solar, natural cold and hot cooperative integrated seasonal energy storage system according to claim 4, wherein an inlet and an outlet of the seasonal thermocline energy storage device (4) are provided with three-way valve sets, and the three-way valve sets switch working condition modes.
6. The wind, solar and natural cold and heat cooperative integrated cross-season energy storage system according to claim 5, wherein the working mode is hot-up storage and cold-down supply in summer; in winter, the heat is supplied upwards and stored downwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221599267.3U CN217877265U (en) | 2022-06-24 | 2022-06-24 | Wind-solar natural cold-heat collaborative integrated seasonal energy storage system |
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| CN202221599267.3U CN217877265U (en) | 2022-06-24 | 2022-06-24 | Wind-solar natural cold-heat collaborative integrated seasonal energy storage system |
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