CN216346577U - Efficient cooling and heating system with heat source tower and river water source connected in parallel - Google Patents

Abstract

A heat source tower and a river water source are connected in parallel to form a high-efficiency cooling and heating system, a heat pump unit, a user side water pump and a source side water pump are arranged, a conventional heat source tower, a river water side water pump and a plate heat exchanger are effectively integrated, and a river water inlet is provided with an inlet filter, a suspended sand filter, a valve and the like to ensure that the system effectively operates. The system takes energy conservation as a guide, and operates the heat source tower system in spring and autumn and in summer and winter at non-extreme temperatures. Under the conditions of high temperature in summer and extremely low temperature in winter, the plate heat exchanger can be opened to operate the river source heat pump under the extreme weather conditions because the river can always keep low temperature in summer and can not be iced in winter, so that the system can be ensured to operate efficiently; because the heat source tower heat pump is connected with the river water source heat pump in parallel, the valve is opened under the extreme conditions that the temperature is higher than 35 ℃ and lower than 0 ℃, river water with proper temperature is introduced, filtered by the inlet filter and the suspended sand filter, enters the river water side water pump, and supplies energy through the plate heat exchanger, so that the high-efficiency operation of the system is ensured.

Description

A high-efficiency cooling and heating system with a heat source tower in parallel with a river water source

technical field

The utility model relates to the technical field of cooling and heating, in particular to a high-efficiency cooling and heating system in which a heat source tower and a river water source are connected in parallel.

Background technique

In the current building refrigeration and air conditioning system, the widely used cooling/heating methods are chiller + boiler (coal, gas or oil) and heat pump (air source heat pump, ground source heat pump and water source heat pump). Each thermal method has its own advantages and disadvantages and scope of application.

The heat source tower heat pump is a system that uses outdoor air as the cold and heat source, and is composed of a heat source tower heat exchange system, a heat source tower heat pump unit, and an in-building system that can provide cooling and heating for buildings and heating domestic hot water. In winter, the carrier medium with freezing point below zero is used to efficiently extract low-grade heat energy in the air with high relative humidity in a low-temperature environment, so as to realize the transfer of low-temperature heat energy to high-temperature heat energy, and achieve the purpose of heating; in summer, it uses the principle of water evaporation to dissipate heat. The heat is discharged to the atmosphere for cooling. As a new type of heat pump, heat source tower heat pump has flexible unit design, is not limited by geological conditions and site, has high operating energy efficiency, low operating cost, and has good adaptability and energy saving.

However, the heat source tower heat pump system is a type of air source heat pump, and there are still some limitations. Quantity is extremely attenuated.

Water source heat pump is a kind of low-level thermal energy resources using the earth's surface or shallow water sources (such as surface water, rivers, lakes) or artificially regenerated water sources (industrial wastewater, geothermal water, etc.) The purpose of heating and cooling. However, due to the water quality problem of the conventional river water source heat pump, it directly sends the river water into the heat pump host, which has a great impact on the system. In the case of high air temperature in summer and low temperature in winter, it is difficult for the heat source tower to work normally, but the river water can always maintain a low temperature in summer and not freeze in winter.

From the above introduction and analysis of the existing building cooling/heating equipment, it can be seen that there is a certain room for improvement in the existing cooling/heating methods in areas near the water source. , using the heat source tower solution to enter the heat pump for heat exchange, which can greatly avoid the influence of river water on the system, and can also realize the parallel operation of the water source heat pump and the heat source tower heat pump to achieve the purpose of efficient cooling and heating.

Utility model content

Aiming at the deficiencies in the prior art, the utility model provides a high-efficiency cooling and heating system in which a heat source tower and a river water source are connected in parallel.

To achieve the above object, the utility model adopts the following technical solutions:

A high-efficiency cooling and heating system in which a heat source tower is connected in parallel with a river water source, comprising a first heat pump, a second heat pump, a user-side water pump, a source-side water pump, a first plate heat exchanger, a river water-side water pump, a suspended sand filter, Inlet filter, outlet end of heat source tower, inlet end of heat source tower;

One end of the user-side water pump is connected to the air-conditioning return water end through a pipeline, the other end of the user-side water pump is connected to the inlet end of the valve V11 through a pipeline, the outlet end of the valve V11 is connected to the inlet end of the second heat pump through a pipeline, and the outlet end of the second heat pump is connected through a pipeline. The inlet end of the valve V12, the outlet end of the valve V12 is connected to the water supply end of the air conditioner through a pipeline;

The outlet end of the heat source tower is connected to the inlet end of the valve V2 through a pipeline, the outlet end of the valve V2 is connected to the source side water pump through a pipeline, the source side water pump is connected to the inlet end of the valve V13 through a pipeline, and the outlet end of the valve V13 is connected to the inlet end of the first heat pump machine through a pipeline, The outlet end of the first heat pump is connected to the inlet end of the valve V14 through a pipeline, the outlet end of the valve V14 is connected to the source side water pump through a pipeline, the source side water pump is connected to the inlet end of the valve V1 through a pipeline, and the outlet end of the valve V1 is connected to the inlet end of the heat source tower;

The inlet end of the valve V13 is connected to the inlet end of the valve V17 through a pipeline, and the outlet end of the valve V17 is connected to the outlet end of the valve V11 through a pipeline; the outlet end of the valve V13 is connected to the inlet end of the valve V15 through a pipeline, and the outlet end of the valve V15 is connected to the inlet end of the valve V11 through a pipeline; The outlet end of valve V14 is connected to the inlet end of valve V18 through a pipeline, and the outlet end of valve V18 is connected to the inlet end of valve V12 through a pipeline; the inlet end of valve V14 is connected to the inlet end of valve V16 through a pipeline, and the outlet end of valve V16 is connected to the outlet end of valve V12 through a pipeline;

The inlet end of the inlet filter is connected to the inlet end of the river water source through a pipeline, the outlet end of the inlet filter is connected to the inlet end of the suspended sand filter through a pipeline, the outlet end of the suspended sand filter is connected to the inlet end of the river water side water pump through a pipeline, and the outlet end of the river water side water pump is connected by a pipeline. The end is connected to the inlet end of the valve V7 through a pipeline, the outlet end of the valve V7 is connected to the inlet end of the valve V8 through a pipeline bypassing the first plate heat exchanger, the outlet end of the valve V8 is connected to the outlet end of the river water source through a pipeline; the outlet end of the valve V2 is connected through a pipeline The inlet end of the valve V6 and the outlet end of the valve V6 are connected to the inlet end of the valve V5 through a pipeline bypassing the first plate heat exchanger, and the outlet end of the valve V5 is connected to the inlet end of the valve V1 through a pipeline.

In order to optimize the above technical solutions, the specific measures taken also include:

Further, the outlet end of the valve V13 is connected to the inlet end of the third heat pump machine through a pipeline, and the outlet end of the third heat pump machine is connected to the inlet end of the valve V14 through a pipeline;

The outlet end of the valve V11 is connected to the inlet end of the fourth heat pump machine through a pipeline, and the outlet end of the fourth heat pump machine is connected to the inlet end of the valve V12 through a pipeline.

Further, the outlet end of the water pump on the side of the river is connected to the inlet end of the valve V9 through a pipeline, the outlet end of the valve V9 is connected to the inlet end of the valve V10 by bypassing the pipeline of the second plate heat exchanger, and the outlet end of the valve V10 is connected to the outlet of the river water source through a pipeline. end.

Further, the outlet end of the valve V2 is connected to the inlet end of the valve V4 through a pipeline, the outlet end of the valve V4 is connected to the inlet end of the valve V3 through a pipeline bypassing the second plate heat exchanger, and the outlet end of the valve V3 is connected to the inlet end of the valve V1 through a pipeline.

The beneficial effects of the present utility model are:

1. A high-efficiency cooling and heating system with a heat source tower in parallel with a river water source proposed in this patent can achieve efficient cooling in summer and efficient heating in winter in areas with low temperature in winter and high temperature in summer and close to water. energy saving effect.

2. A high-efficiency cooling and heating system with a heat source tower and a river water source in parallel proposed by this patent, considering the characteristics of low temperature in extreme weather in winter, adding a river water source heat pump to work in parallel with the heat source tower, and eliminating the traditional heat source tower heat pump system The problem of insufficient heating capacity in extreme weather greatly improves the heating and heating efficiency in winter.

3. A high-efficiency cooling and heating system in which the heat source tower is connected in parallel with the river water source proposed by this patent, which operates in parallel with the river water source through the heat source tower, eliminates the possible freezing problem due to the dirty water quality of the river water and the low temperature of the river water in winter, Energy efficiency is greatly improved.

4. The river water is only used for heat exchange and is not mixed into the inner water of the whole system, so it can reduce the influence on the work of the whole system.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present utility model connection.

In the picture: 1. The first heat pump, 2. The second heat pump, 3. The user-side water pump, 4. The source-side water pump, 5. The first plate heat exchanger, 6. The river water-side water pump, 7. The suspended sand filter , 8, inlet filter, 9, heat source tower outlet, 10, heat source tower inlet, 11, air conditioning return end, 12, air conditioning water supply end, 13, river water inlet end, 14, river water outlet end, 15 , The third heat pump, 16, the fourth heat pump, 17, the second plate heat exchanger.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings.

A high-efficiency cooling and heating system in which a heat source tower is connected in parallel with a river water source is provided by setting a heat pump unit (the first heat pump unit 1 and the second heat pump unit 2 form a heat pump unit, and the third heat pump unit 15 and the fourth heat pump unit 16 form a heat pump unit. Heat pump unit), user-side water pump 3, source-side water pump 4, combined with conventional heat source tower, river water side water pump 6, plate heat exchanger for effective integration, the river water inlet is equipped with river water inlet filter 8, suspended sand filter 7, Valves, etc. to ensure the effective operation of the system.

The system is energy-saving oriented and operates the heat source tower system in spring and autumn as well as in summer and winter without extreme temperatures; in the case of high summer temperature and extremely low winter temperature, because the river water can always keep the summer temperature low, winter does not In the freezing state, in extreme weather conditions, the plate heat exchanger can be opened to run the river water source heat pump to ensure the efficient operation of the system.

Since the heat source tower heat pump and the river water source heat pump are connected in parallel, under the extreme conditions of temperature higher than 35°C and lower than 0°C, open the valve and introduce river water with a suitable temperature, which is filtered by the river water inlet filter 8 and the suspended sand filter 7 before entering the The water pump 6 on the river side is powered by the plate heat exchanger to ensure the efficient operation of the system.

The following description will be given with specific embodiments. Refer to Figure 1.

The whole system includes two closed loops, namely the user-side circulation and the source-side circulation (the user-side circulation is similar to the indoor unit of a household air conditioner, and the source-side circulation is similar to the outdoor unit of a household air conditioner, forming a cooling and heating cycle to maintain the stability of the entire system. ).

The system mainly includes the following working modes: 1, heat source tower cooling mode 2, heat source tower heating mode 3, river water source cooling mode 4, river water source heating mode; the first and second modes are used in spring and autumn as well as summer and winter. The heat source tower system is operated at the extreme temperature without extreme temperature; the 3rd and 4th modes are used in the extreme temperature conditions with high temperature in summer and extremely low temperature in winter.

1. Heat source tower cooling mode: valve V1, valve V2, valve V11, valve V12, valve V13, and valve V14 are open, and the rest are closed. The cold water at 10°C flowing out from the air-conditioning return end 11 passes through the user-side water pump 3 and valve V11 and enters the inlet end of the second heat pump 2 and the fourth heat pump 16, where it is cooled to 5°C, and then flows from the second heat pump 2 and the fourth heat pump 16. The outlet end of the heat pump machine 16 flows through the valve V12, and then goes to the air-conditioning water supply end 12. After absorbing the temperature through the user's indoor temperature, the cold water of 10°C is returned from the air-conditioning return end 11 to the second heat pump machine 2 and the fourth heat pump. Machine 16, complete the cold side cycle (user side). The water (hot water) in the source side system at 37° in the first heat pump unit 1 and the third heat pump unit 15 passes through the valve V14, the source side water pump 4 and the valve V1, enters the inlet end 10 of the heat source tower, and is cooled by the heat exchange of the heat source tower At 32°, it flows out of the heat source tower through the outlet end 9 of the heat source tower, and then passes through the valve V2, the source side water pump 4, and the valve V13, and flows into the inlet end of the first heat pump 1 and the third heat pump 15, and the temperature rises to 37 ℃. Heat source tower, complete hot side cycle (source side).

2. Heating mode of heat source tower: open valves V1, V2, V15, V16, V17, V18, and close other valves. The hot water at 42°C from the air-conditioning return end 11 enters the inlet end of the first heat pump 1 and the third heat pump 15 through the user-side water pump 3 and valve V15, and is heated to 47°C, and then flows from the first heat pump 1 and the third heat pump 15. The outlet end of the third heat pump machine 15 flows through the valve V16, and then goes to the air-conditioning water supply end 12. After the user's indoor temperature is absorbed, the hot water at 42°C is returned to the first heat pump machine 1 from the air-conditioning water return end 11. And the third heat pump machine 15, to complete the cycle of the hot side (user side). The water (solution) in the source side system at -3°C in the second heat pump 2 and the fourth heat pump 16 (the water will freeze at this temperature, so it is called solution) passes through the valve V18, the source side water pump 4 and the valve V1 from the outlet end Flow into the heat source tower inlet end 10, be heated to 0 ° C through the heat source tower heat exchange, flow out of the heat source tower through the heat source tower outlet end 9, enter the second heat pump machine 2 and the fourth heat pump through valve V2, source side water pump 4 and valve V17 At the inlet end of the machine 16, the solution (water will freeze at this temperature, so it is called solution) is cooled to -3°C and flows out into the heat source tower to complete the cold side cycle (source side).

3. River water cooling mode: Valves V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13, V14 are open, and the rest are closed. The cold water at 10°C flowing out from the air-conditioning return end 11 passes through the user-side water pump 3 and valve V11 and enters the inlet end of the second heat pump 2 and the fourth heat pump 16, where it is cooled to 5°C, and then flows from the second heat pump 2 and the fourth heat pump 16. The outlet end of the heat pump machine 16 flows through the valve V12, and then goes to the air-conditioning water supply end 12. After the user's indoor temperature absorbs heat, the cold water of 10°C is returned from the air-conditioning return end 11 to the second heat pump machine 2 and the fourth heat pump. Machine 16, complete the cold side cycle (user side). The river water inlet end 13 at the river water flows into cold water at 25°C, passes through the inlet filter 8 and the suspended sand filter 7, enters the river water side water pump 6, passes through the valves V7, V8, V9, V10, and passes through the first plate heat exchanger. 5 and the second plate heat exchanger 17 exchange heat with the water in the system on the source side, the river water is heated to 30°C and flows out from the outlet 14 of the river water source, and the water in the source side system at 37°C passes through the valves V3, V4, V5, V6 exchanges heat with river water through the first plate heat exchanger 5 and the second plate heat exchanger 17, is cooled to 32 °C and flows out, and passes through the source side water pump 4 and valve V13 to the inlet of the first heat pump 1 and the third heat pump 15 The end, heated to 37 ° C again, flows out from the outlet end of the first heat pump 1 and the third heat pump 15, and flows back to the first plate heat exchanger 5 and the second plate heat exchanger through the valve V14 and the source side water pump 4 At device 17, the hot side cycle (source side) is completed.

4. River water heating mode: Valves V3, V4, V5, V6, V7, V8, V9, V10, V15, V16, V17, V18 are open, and the rest are closed. The hot water at 42°C from the air-conditioning return end 11 enters the inlet end of the first heat pump 1 and the third heat pump 15 through the user-side water pump 3 and valve V15, and is heated to 47°C, and then flows from the first heat pump 1 and the third heat pump. The outlet end of the three heat pump machines 15 flows through the valve V16, and then goes to the air-conditioning water supply end 12. After the user's indoor temperature is absorbed, the 42°C hot water is returned from the air-conditioning return end 11 to the first heat pump machine 1 and the first heat pump machine. Three heat pump machines 15, complete the heat side cycle (user side). The river water inlet end 13 at the river water flows into cold water at 4°C, passes through the inlet filter 8 and the suspended sand filter 7, enters the river water side water pump 6, passes through the valves V7, V8, V9, V10, and passes through the first plate heat exchanger. 5 and the second plate heat exchanger 17 exchange heat with the water in the source side system, and the river water is cooled to 1°C and flows out from the water outlet 14 of the river water source. The water (solution) in the system at -3° (the water will freeze at this temperature, so it is called solution) exchanges with the river water through the first plate heat exchanger 5 and the second plate heat exchanger 17 through the valves V3, V4, V5, V6 The heat is heated to 0 °C and flows out, and flows into the inlet end of the second heat pump 2 and the fourth heat pump 16 through the source side water pump 4 and valve V17, and is cooled to -3 °, from the second heat pump 2 and the fourth heat pump. 16 The outlet end flows out, passes through the valve V18 and the source side water pump 4 flows back to the first plate heat exchanger 5 and the second plate heat exchanger 17 to complete the cold side cycle (source side).

Among them, the water in the system includes the water circulating on the user side, that is: the air conditioner return end 11—the heat pump unit—the air conditioner water supply end 12—the air conditioner return end 11; it also includes the inner water circulating on the source side, that is: the heat pump unit - heat source tower - heat pump unit, or heat pump unit - plate heat exchanger - heat pump unit. In the 1st, 2nd, 3rd, and 4th modes, the water in the system circulating on the user side is the same, that is, from the air conditioner return end 11—the heat pump unit—the air conditioner water supply end 12—the air conditioner return end 11. In the 1st and 2nd modes, heat exchange is carried out through the heat source tower, so the direction of the water in the system on the source side is: heat pump unit - heat source tower - heat pump unit. In the 3rd and 4th modes, heat exchange is carried out through river water, so the direction of water in the system on the source side is heat pump unit - plate heat exchanger - heat pump unit.

It should be noted that the terms such as "up", "down", "left", "right", "front", "rear", etc. quoted in the utility model are only for the convenience of description and clarity, not for use In order to limit the applicable scope of the present invention, the change or adjustment of the relative relationship shall also be regarded as the applicable scope of the present invention without substantially changing the technical content.

The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (4)

1. A high-efficiency cold and heat supply system with a heat source tower and a river water source connected in parallel is characterized by comprising a first heat pump machine (1), a second heat pump machine (2), a user side water pump (3), a source side water pump (4), a first plate heat exchanger (5), a river water side water pump (6), a suspended sand filter (7), an inlet filter (8), a heat source tower outlet end (9) and a heat source tower inlet end (10);

one end of the user side water pump (3) is connected with an air conditioner water return end (11) through a pipeline, the other end of the user side water pump (3) is connected with an inlet end of a valve V11 through a pipeline, an outlet end of the valve V11 is connected with an inlet end of a second heat pump machine (2) through a pipeline, an outlet end of the second heat pump machine (2) is connected with an inlet end of a valve V12 through a pipeline, and an outlet end of the valve V12 is connected with an air conditioner water supply end (12) through a pipeline;

the outlet end (9) of the heat source tower is connected with the inlet end of a valve V2 through a pipeline, the outlet end of the valve V2 is connected with a source side water pump (4) through a pipeline, the source side water pump (4) is connected with the inlet end of a valve V13 through a pipeline, the outlet end of the valve V13 is connected with the inlet end of a first heat pump machine (1) through a pipeline, the outlet end of the first heat pump machine (1) is connected with the inlet end of a valve V14 through a pipeline, the outlet end of the valve V14 is connected with the source side water pump (4) through a pipeline, the source side water pump (4) is connected with the inlet end of a valve V1 through a pipeline, and the outlet end of the valve V1 is connected with the inlet end (10) of the heat source tower;

the inlet end of the valve V13 is connected with the inlet end of the valve V17 through a pipeline, and the outlet end of the valve V17 is connected with the outlet end of the valve V11 through a pipeline; the outlet end of the valve V13 is connected with the inlet end of the valve V15 through a pipeline, and the outlet end of the valve V15 is connected with the inlet end of the valve V11 through a pipeline; the outlet end of the valve V14 is connected with the inlet end of the valve V18 through a pipeline, and the outlet end of the valve V18 is connected with the inlet end of the valve V12 through a pipeline; the inlet end of the valve V14 is connected with the inlet end of the valve V16 through a pipeline, and the outlet end of the valve V16 is connected with the outlet end of the valve V12 through a pipeline;

the inlet end of the inlet filter (8) is connected with a river water source water inlet end (13) through a pipeline, the outlet end of the inlet filter (8) is connected with the inlet end of the suspended sand filter (7) through a pipeline, the outlet end of the suspended sand filter (7) is connected with the inlet end of the river water side water pump (6) through a pipeline, the outlet end of the river water side water pump (6) is connected with the inlet end of a valve V7 through a pipeline, the outlet end of the valve V7 is connected with the inlet end of a valve V8 through a pipeline bypassing the first plate heat exchanger (5), and the outlet end of the valve V8 is connected with a river water source water outlet end (14) through a pipeline; the outlet end of the valve V2 is connected with the inlet end of the valve V6 through a pipeline, the outlet end of the valve V6 is connected with the inlet end of the valve V5 through a pipeline bypassing the first plate heat exchanger (5), and the outlet end of the valve V5 is connected with the inlet end of the valve V1 through a pipeline.

2. The system of claim 1, wherein the heat source tower is connected in parallel with the river water source for supplying cold and heat efficiently,

the outlet end of the valve V13 is connected with the inlet end of a third heat pump machine (15) through a pipeline, and the outlet end of the third heat pump machine (15) is connected with the inlet end of a valve V14 through a pipeline;

the outlet end of the valve V11 is connected with the inlet end of the fourth heat pump machine (16) through a pipeline, and the outlet end of the fourth heat pump machine (16) is connected with the inlet end of the valve V12 through a pipeline.

3. The system of claim 1, wherein the heat source tower is connected in parallel with the river water source for supplying cold and heat efficiently,

the outlet end of the river side water pump (6) is connected with the inlet end of a valve V9 through a pipeline, the outlet end of a valve V9 is connected with the inlet end of a valve V10 through a pipeline bypassing the second plate heat exchanger (17), and the outlet end of the valve V10 is connected with the water outlet end (14) of a river source through a pipeline.

4. An efficient cooling and heating system with a heat source tower connected in parallel with a river water source as claimed in claim 3,

the outlet end of the valve V2 is connected with the inlet end of a valve V4 through a pipeline, the outlet end of the valve V4 is connected with the inlet end of a valve V3 through a pipeline bypassing the second plate heat exchanger (17), and the outlet end of the valve V3 is connected with the inlet end of a valve V1 through a pipeline.

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