Energy storage air conditioning system

Abstract

The utility model relates to an energy storage air conditioning system which comprises a cold and heat source unit and an energy storage water tank, a cold and heat source side water supply and return pipeline is arranged between the cold and heat source unit and the energy storage water tank, and a user side water supply and return pipeline is arranged between the energy storage water tank and a user side. The energy storage water tank is communicated with an energy storage water tank pipeline which is used for communicating the energy storage water tank with the cold and heat source side water supply and return pipeline and communicating the energy storage water tank with the user side water supply and return pipeline. The energy-saving effect of the energy storage air conditioning system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, ventilation and air conditioning engineering, and particularly relates to a thermal energy storage air conditioning system. Background Art

[0002] The cold and heat sources of an air conditioning system are the core construction contents of the heating, ventilation and air conditioning specialty, especially for the design of large air conditioning systems.

[0003] Due to the use of multiple users corresponding to the air conditioning terminal, the demand of the air conditioning terminal is variable; with the change of outdoor meteorological parameters and the non-fixed user operation and maintenance time, the time when the peak value of the air conditioning load appears has strong randomness; the scale of the user side of the central air conditioning system is large, the radiation range of the air conditioning pipe network is wide, and the energy consumption of air conditioning transmission and distribution is high. Based on the above characteristics, higher requirements are put forward for the reasonable design of the air conditioning cold and heat source system.

[0004] If the cold and heat sources of the air conditioning system continuously output energy to the user side, it is easy to cause the mismatch between energy supply and terminal demand, resulting in energy waste. Especially, the air conditioning supply demands are different between night and day, which will cause more waste of energy resources. Content of the Utility Model

[0005] Based on the above description, the utility model provides a thermal energy storage air conditioning system to solve the problem that the energy saving effect of the thermal energy storage air conditioning system needs to be improved.

[0006] The technical solution of the utility model to solve the above technical problems is as follows: a thermal energy storage air conditioning system, including a cold and heat source unit and a thermal energy storage water tank, a cold and heat source side supply and return water pipeline is arranged between the cold and heat source unit and the thermal energy storage water tank, and a user side supply and return water pipeline is arranged between the thermal energy storage water tank and the user side;

[0007] A thermal energy storage water tank pipeline is communicated with the thermal energy storage water tank, and the thermal energy storage water tank pipeline is used for communicating the thermal energy storage water tank with the cold and heat source side supply and return water pipeline, and the thermal energy storage water tank with the user side supply and return water pipeline.

[0008] On the basis of the above technical solution, the utility model can be further improved as follows.

[0009] Further, the cold and heat source side supply and return water pipeline includes a cold and heat source side supply water pipe and a cold and heat source side return water pipe, and both the cold and heat source side supply water pipe and the cold and heat source side return water pipe are simultaneously communicated with the user side supply and return water pipeline and the thermal energy storage water tank.

[0010] Further, the user side supply and return water pipeline includes a user side supply water pipe and a user side return water pipe, the user side supply water pipe is simultaneously communicated with the thermal energy storage water tank and the cold and heat source side supply water pipe, and the user side return water pipe is simultaneously communicated with the thermal energy storage water tank and the cold and heat source side return water pipe.

[0011] Further, the energy storage water tank pipeline includes a first water storage pipeline, a second water storage pipeline, a third water storage pipeline, and a fourth water storage pipeline.

[0012] One end of the second water storage pipeline is connected to the energy storage water tank, and the other end is connected to the water supply pipe on the cold heat source side.

[0013] One end of the third water storage pipeline is connected to the energy storage water tank, and the other end is connected to the return water pipe on the user side.

[0014] One end of the first water storage pipeline is connected to the energy storage water tank, and the other end is connected to the second water storage pipeline.

[0015] One end of the fourth water storage pipeline is connected to the energy storage water tank, and the other end is connected to the third water storage pipeline.

[0016] Further, an energy storage water pump is installed on the cold heat source side return water pipe, and a discharge energy water pump is installed on the user side water supply pipe.

[0017] Further, a butterfly valve for controlling the on / off of the pipeline is provided on each pipeline.

[0018] Further, the energy storage water tank includes an upper part and a lower part. The first water storage pipeline and the third water storage pipeline are connected to the upper part of the energy storage water tank, and the second water storage pipeline and the fourth water storage pipeline are connected to the lower part of the energy storage water tank.

[0019] Further, the installation height of the energy storage water tank is higher than that of the cold heat source unit.

[0020] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0021] 1. The energy storage air conditioning system of the present application adopts energy storage technology, converts the surplus electric energy at night in the power grid into heat or cold and stores it in the energy storage water tank, and releases it during the peak electricity consumption period during the day; by using the relevant electricity price policies of the national power department, a large amount of air conditioning electricity costs can be saved; the energy storage air conditioning system of the present application can cut peaks and fill valleys, improve the utilization efficiency of the power grid, and reduce the power generation and transmission power consumption; in addition, by storing cold or heat in the energy storage water tank, in the event of a sudden power failure accident, emergency supply can be realized, improving the security of the air conditioning system.

[0022] 2. The energy storage air conditioning system of the present application is designed with an energy storage water pump and a discharge energy water pump to form a secondary pump, so that the energy storage water pump and the discharge energy water pump of the present application are coupled and designed, and the operation efficiency is higher; in addition, the relevance between each working condition of the energy storage air conditioning system and the energy storage water pump and the discharge energy water pump is improved, and the energy storage air conditioning system can be controlled by controlling the energy storage water pump and the discharge energy water pump, reducing the butterfly valve control frequency, making the overall control of the energy storage air conditioning system simpler.

[0023] 3. Through the design of the supply and return water pipelines on the cold and heat source side, the supply and return water pipelines on the user side, the energy storage water tank pipeline, and the butterfly valves in this application, the energy storage air conditioning system of this application can achieve five different operating conditions, improving the energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall design principle of the energy storage air conditioning system of this application;

[0025] Figure 2 It is the valve switch status of various different operating modes of the energy storage air conditioning system of this application.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Cold and heat source unit; 2. Energy storage water pump; 3. Energy release water pump; 4. Energy storage water tank; 5. Supply and return water pipelines on the cold and heat source side; 501. Cold and heat source side supply water pipe; 502. Cold and heat source side return water pipe; 6. Supply and return water pipelines on the user side; 601. User side supply water pipe; 602. User side return water pipe; 701. First water storage pipeline; 702. Second water storage pipeline; 703. Third water storage pipeline; 704. Fourth water storage pipeline; 801. First butterfly valve; 802. Second butterfly valve; 803. Third butterfly valve; 804. Fourth butterfly valve; 805. Fifth butterfly valve; 806. Sixth butterfly valve; 807. Seventh butterfly valve; 808. Eighth butterfly valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] An energy storage air conditioning system, referring to Figure 1 , includes a cold and heat source unit 1 and an energy storage water tank 4. The cold and heat source unit 1 is a unit for supplying cooling in summer and heating in winter to the user side. A cold and heat source side supply and return water pipeline 5 is provided between the cold and heat source unit 1 and the energy storage water tank 4. The cold and heat source side supply and return water pipeline 5 includes a cold and heat source side supply water pipe 501 and a cold and heat source side return water pipe 502. The energy storage water tank 4 is also connected to the user side. A user side supply and return water pipeline 6 is provided between the energy storage water tank 4 and the user side. The user side supply and return water pipeline 6 includes a user side supply water pipe 601 and a user side return water pipe 602.

[0031] Specifically, one end of the supply water pipe 501 on the cold and heat source side is connected to the cold and heat source unit 1, and the other end is connected to the supply water pipe 601 on the user side; one end of the return water pipe 502 on the cold and heat source side is connected to the cold and heat source unit 1, and the other end is connected to the return water pipe 602 on the user side. One end of the supply water pipe 601 on the user side, which is far from the supply water pipe 501 on the cold and heat source side, is connected to the user side, and one end of the return water pipe 602 on the user side, which is far from the return water pipe 502 on the cold and heat source side, is connected to the user side.

[0032] A storage water tank pipeline is connected to the energy storage water tank 4. The energy storage water tank 4 includes an upper part and a lower part. The storage water tank pipeline includes a first storage water pipeline 701, a second storage water pipeline 702, a third storage water pipeline 703, and a fourth storage water pipeline 704. One end of the second storage water pipeline 702 is connected to the lower part of the energy storage water tank 4, and the other end is connected to the supply water pipe 501 on the cold and heat source side; one end of the third storage water pipeline 703 is connected to the upper part of the energy storage water tank 4, and the other end is connected to the return water pipe 602 on the user side; one end of the first storage water pipeline 701 is connected to the upper part of the energy storage water tank 4, and the other end is connected to the second storage water pipeline 702; one end of the fourth storage water pipeline 704 is connected to the lower part of the energy storage water tank 4, and the other end is connected to the third storage water pipeline 703.

[0033] Furthermore, the water supply generated by the cold and heat source unit 1 can be stored in the energy storage water tank 4 along the cold and heat source side supply and return water pipeline 5, and transported from the energy storage water tank 4 to the user side through the user side supply and return water pipeline 6. In addition, a butterfly valve for controlling the on-off of the pipeline is provided on each pipeline. Through the design of the butterfly valve and the pipeline of this application, the five operating conditions of energy storage condition, energy release condition, combined supply condition, simultaneous energy storage and supply condition, and main unit single supply condition can be realized, improving the energy-saving effect of the energy storage air-conditioning system of this application.

[0034] Further, an energy storage water pump 2 is installed on the return water pipe 502 on the cold and heat source side, and a energy release water pump 3 is installed on the supply water pipe 601 on the user side. By setting the energy storage water pump 2 and the energy release water pump 3, the water pumps of the energy storage air-conditioning system of this application are divided into two levels. The energy storage water pump 2 bears the resistance loss of the loop of the cold and heat source unit 1, and the energy release water pump 3 bears the resistance loss of the end loop of the energy storage air-conditioning system, improving the operating efficiency of the water pump under different conditions and reducing the energy consumption of the water pump.

[0035] The butterfly valves include a first butterfly valve 801 provided on the third storage water pipeline 703, a second butterfly valve 802 provided on the return water pipe 502 on the cold and heat source side, a third butterfly valve 803 provided on the return water pipe 602 on the user side, a fourth butterfly valve 804 provided on the supply water pipe 501 on the cold and heat source side, a fifth butterfly valve 805 provided on the supply water pipe 601 on the user side, a sixth butterfly valve 806 provided on the first storage water pipeline 701, a seventh butterfly valve 807 provided on the second storage water pipeline 702, and an eighth butterfly valve 808 provided on the fourth storage water pipeline 704.

[0036] Refer to Figure 2 , Figure 2 This is about how the energy storage air conditioning system of this application realizes the conversion of five operating conditions by controlling the opening and closing of each butterfly valve, energy storage water pump 2 and energy release water pump 3. In addition, the energy storage water tank 4 of this application is set to have an upper part and a lower part. According to the natural law, the temperature in the upper part of the energy storage water tank 4 is higher than that in the lower part. Combining with the design of the first energy storage water pipeline 701 to the fourth energy storage water pipeline 704 of this application, more efficient functions can be achieved. Specifically refer to Figure 2 the energy storage condition and the energy release condition in the heat storage system in

[0037] In the energy storage condition, turn on the energy storage water pump 2 and turn off the energy release water pump 3, so that there is a pressure in the energy storage air conditioning system from the upper part of the energy storage water tank 4 to the lower part of the energy storage water tank 4. At the same time, open the sixth butterfly valve 806 and the eighth butterfly valve 808, so that hot water enters the energy storage water tank 4 from the upper part of the energy storage water tank 4 through the sixth butterfly valve 806. Since the temperature in the upper part is higher, the heat can be more fully retained in the upper part of the energy storage water tank 4; in the energy release condition, turn off the energy storage water pump 2 and turn on the energy release water pump 3. At this time, there is a pressure in the energy storage air conditioning system from the lower part of the energy storage water tank 4 to the upper part of the energy storage water tank 4. At this time, still open the sixth butterfly valve 806 and the eighth butterfly valve 808, so that the hot water can be discharged from the sixth butterfly valve 806 to the user side water supply pipe 601. Since the temperature in the upper part of the energy storage water tank 4 is higher, more heat is discharged to the user side water supply pipe 601.

[0038] The remaining operating conditions are set based on the design concept in the above example and will not be elaborated one by one here. This application uses the opening and closing of the energy storage water pump 2 and the energy release water pump 3 to replace the opening and closing of multiple butterfly valves. By adjusting the flow rates of the energy storage water pump 2 and the energy release water pump 3, flexible conversion among the combined supply condition, the simultaneous energy storage and supply condition, and the single supply of the main unit can be achieved, reducing the number of actions of the butterfly valves, making the control of the energy storage air conditioning system of this application simpler and the system safer.

[0039] In addition, the installation position of the energy storage water tank 4 of this application is higher than that of the cold and heat source unit 1, so that the energy storage water tank 4 can be set at a relatively high position, reducing the pressure isolation plate heat exchanger compared with the conventional water energy storage system, improving the energy storage capacity and energy storage efficiency of the energy storage water tank 4; in addition, the high-position energy storage water tank 4 can be used as a constant pressure make-up water device, reducing the constant pressure make-up water tank in the original system.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy storage air conditioning system, characterized in that: It comprises a cold and hot source unit (1) and an energy storage water tank (4), a cold and hot source side water supply and return pipeline (5) is arranged between the cold and hot source unit (1) and the energy storage water tank (4), and a user side water supply and return pipeline (6) is arranged between the energy storage water tank (4) and the user side; The energy storage water tank (4) is connected to an energy storage water tank pipeline, and the energy storage water tank pipeline is used to connect the energy storage water tank (4) and the cold and hot source side water supply and return pipeline (5), and the energy storage water tank (4) and the user side water supply and return pipeline (6).

2. The energy storage air conditioning system according to claim 1, characterized in that: The cold and hot source side water supply and return pipeline (5) comprises a cold and hot source side water supply pipe (501) and a cold and hot source side water return pipe (502), and the cold and hot source side water supply pipe (501) and the cold and hot source side water return pipe (502) are both connected to the user side water supply and return pipeline (6) and the energy storage water tank (4) at the same time.

3. The energy storage air conditioning system according to claim 2, characterized in that: The user-side water supply and return pipeline (6) comprises a user-side water supply pipe (601) and a user-side water return pipe (602); the user-side water supply pipe (601) is simultaneously connected to the energy storage water tank (4) and the cold and heat source-side water supply pipe (501); and the user-side water return pipe (602) is simultaneously connected to the energy storage water tank (4) and the cold and heat source-side water return pipe (502).

4. The energy storage air conditioning system according to claim 3, characterized in that: The energy storage water tank pipeline comprises a first water storage pipeline (701), a second water storage pipeline (702), a third water storage pipeline (703) and a fourth water storage pipeline (704). One end of the second water storage pipeline (702) is connected to the energy storage water tank (4), and the other end is connected to the cold and hot source side water supply pipe (501); One end of the third water storage pipeline (703) is connected to the energy storage water tank (4), and the other end is connected to the user-side water return pipe (602); One end of the first water storage pipeline (701) is in communication with the energy storage water tank (4), and the other end is in communication with the second water storage pipeline (702); One end of the fourth water storage pipeline (704) is connected to the energy storage water tank (4), and the other end is connected to the third water storage pipeline (703).

5. The energy storage air conditioning system according to claim 3, characterized in that: An energy storage water pump (2) is installed on the return water pipe (502) on the cold and hot source side, and an energy release water pump (3) is installed on the water supply pipe (601) on the user side.

6. The energy storage air conditioning system according to claim 4, characterized in that: Each pipeline is provided with a butterfly valve for controlling the on-off of the pipeline.

7. The energy storage air conditioning system according to claim 4, characterized in that: The energy storage water tank (4) comprises an upper part and a lower part, the first water storage pipeline (701) and the third water storage pipeline (703) are in communication with the upper part of the energy storage water tank (4), and the second water storage pipeline (702) and the fourth water storage pipeline (704) are in communication with the lower part of the energy storage water tank (4).

8. The energy storage air conditioning system according to claim 1, characterized in that: The energy storage water tank (4) is arranged at a higher height than the cold and heat source unit (1).

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