Air conditioning system based on peak load shifting

Abstract

The utility model discloses an air conditioning system based on peak load shifting, which comprises an energy supply main pipeline, a water tank and a heat exchanger, the water tank is connected into the energy supply main pipeline through the heat exchanger, a first energy supply pipeline, a second energy supply pipeline and a third energy supply pipeline are arranged between the water tank and the heat exchanger, and the first energy supply pipeline is connected with the heat exchanger. And the flow direction of cold / hot water is changed to adjust the cold / heat storage working condition or the cold / heat release working condition. The operation of the system is mainly controlled through the switching of related valves in the pipeline, cold storage or heat storage is carried out by using the water tank in the off-peak electricity period, and cold release or heat release is carried out in the peak electricity price period, so that the operation cost of a user side can be reduced, and the effects of peak load shifting can be achieved on a power grid side.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy utilization, concretely relates to a kind of air conditioning system based on peak clipping. BACKGROUND

[0002] With the sustained development of economic level, people's living standards are constantly improved, although the application of traditional centralized cooling and heating is more and more widely, but its disadvantages are gradually revealed, large power consumption, so that the peak valley load difference of power system is increasing. UTILITY MODEL CONTENT

[0003] The air conditioning system based on peak clipping for peak shaving and energy saving provided by the utility model can at least solve one of the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: an air conditioning system based on peak clipping, comprising an energy supply main pipeline, further comprising a water tank and a heat exchanger, the water tank is connected to the energy supply main pipeline through the heat exchanger, first, second and third energy supply pipelines are arranged between the water tank and the heat exchanger, for changing the flow direction of cold / hot water to adjust the working condition of cold storage / heat storage, or cold release / heat release condition.

[0005] Further, the water tank is provided with an upper water distributor and a lower water distributor spaced apart vertically;

[0006] In the cold storage or heat release condition, cold water is injected into the water tank from the lower water distributor on the primary side of the heat exchanger, and hot water is sent out from the upper water distributor in the water tank, and the water volume in the water tank remains unchanged;

[0007] In the cold release or heat storage condition, cold water is transported to the primary side of the heat exchanger through the lower water distributor, and hot water is returned to the water tank through the upper water distributor.

[0008] Further, the first energy supply pipeline is led out from the upper water distributor of the water tank, and connected in sequence through a first valve, a second valve, a sixth valve, a water pump and a seventh valve, and connected to the primary side of the heat exchanger.

[0009] Further, the second energy supply pipeline is led out from the lower water distributor of the water tank, and connected to the sixth valve through a fourth valve.

[0010] Further, the third energy supply pipeline is divided into two paths after being led out from the primary side of the heat exchanger, one path is connected to the second valve in the first energy supply pipeline through a third valve, and the other path is connected to the fourth valve in the second energy supply pipeline through a fifth valve.

[0011] Further, the energy supply main pipe is a main pipe for heating or cooling, and the energy supply main pipe is separated from the energy supply pipe / second energy supply pipe / third energy supply pipe through the heat exchanger.

[0012] Further, the heat exchanger is a plate heat exchanger, and a primary side of the heat exchanger is a heat or cold supply side for supplying energy to a secondary side, and the secondary side of the heat exchanger is a heat or cold receiving side for supplying energy to a user end.

[0013] Further, the water pump is arranged in a pipe for supplying water, and valves for water flow on-off are arranged at both ends of the water pump.

[0014] The beneficial effects of the utility model are embodied in:

[0015] 1. The water tank is arranged. Water distributors are arranged at upper and lower parts of the water tank, and natural temperature stratification principle is adopted, that is, natural stratification is realized by using different densities of water at different temperatures. In the cold storage or heat release condition, cold water from the primary side of the heat exchanger enters the water tank through the water distributor at the lower part, and hot water is sent out from the water distributor at the upper part, and the water amount in the water tank remains unchanged. In the cold release or heat storage condition, the water flow direction is opposite to that in the cold storage or heat release condition, and cold water is sent to the primary side of the heat exchanger through the water distributor at the lower part, and backflow hot water enters the water tank from the water distributor at the upper part.

[0016] 2. The design of related pipes. The heat exchanger is used to separate three energy supply pipe systems related to the water tank from the main pipe for heating / cooling, so that maintenance is facilitated, and work burden and economic loss are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and are used to explain the present application, and do not constitute improper limitation on the present application.

[0018] Figure 1 It is a system overall structure schematic view of the utility model embodiment.

[0019] Figure 2 It is a working schematic view of the system of the utility model embodiment.

[0020] The marks of components in the drawings are as follows: 1, water tank; 2, water pump; 3, heat exchanger; 101, first valve; 102, second valve; 103, third valve; 104, fourth valve; 105, fifth valve; 106, sixth valve; 107, seventh valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] It should be noted that if the present application is described as "first", "second" and the like in the embodiments of the present application, the "first", "second" and the like are only for description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme.

[0023] Referring to Figures 1-2 The embodiment of the present application provides a kind of based on peak clipping and valley filling air conditioning system, including energy supply main pipeline, still including water tank 1 and heat exchanger 3, the water tank 1 is connected to the energy supply main pipeline by the heat exchanger 3, first energy supply pipeline, second energy supply pipeline and third energy supply pipeline are arranged between the water tank 1 and the heat exchanger 3, for changing the flow direction of cold / hot water to adjust the working condition of cold storage / heat storage, or cold release / heat release condition.

[0024] Referring to Figure 1 In the present embodiment, upper water distributor and lower water distributor are arranged in the water tank 1 in up-down interval;

[0025] In cold storage or heat release condition, cold water is injected into the water tank 1 from the lower water distributor of the heat exchanger 3 primary side, hot water is sent out from the water tank 1 by the upper water distributor, and the water quantity in the water tank 1 remains unchanged;

[0026] In cold release or heat storage condition, cold water is transported to the heat exchanger 3 primary side through the lower water distributor, and hot water is returned to the water tank 1 through the upper water distributor.

[0027] Referring to Figure 1 In the present embodiment, the first energy supply pipeline is led out from the upper water distributor of the water tank 1, sequentially passes through first valve 101, second valve 102, sixth valve 106, water pump 2 and seventh valve 107, and is connected with the heat exchanger 3 primary side.

[0028] Referring to Figure 1In the embodiment, the second energy supply pipeline is led out from the lower water distributor of the water tank 1 and connected to the sixth valve 106 through the fourth valve 104.

[0029] Referring to Figure 1 In the embodiment, the third energy supply pipeline is led out from the primary side of the heat exchanger 3 and then divided into two paths, one of which is connected to the second valve 102 in the first energy supply pipeline through the third valve 103, and the other of which is connected to the fourth valve 104 in the second energy supply pipeline through the fifth valve 105.

[0030] Referring to Figure 1 In the embodiment, the energy supply main pipeline is a main pipeline for heating or cooling, which is separated from the first / second / third energy supply pipeline through the heat exchanger 3, facilitating later maintenance and repair without affecting the normal operation of the main pipeline, which helps to reduce economic losses and work burden.

[0031] In the embodiment, the heat exchanger 3 is a plate heat exchanger, the primary side of the heat exchanger 3 is a heat or cold supply side for providing energy to the secondary side, and the secondary side of the heat exchanger 3 is a heat or cold receiving side for providing energy to the user end.

[0032] In the embodiment, the water pump 2 is arranged in the pipeline for water supply, and valves for water flow on-off are arranged at both ends of the water pump 2. In the system, water supply and return are realized by switching the related valves on the pipelines.

[0033] Referring to Figure 2 The present application is described as follows for different working conditions.

[0034] In the heat release working condition, the first valve 101, the second valve 102, the fifth valve 105, the sixth valve 106 and the seventh valve 107 are opened, and the third valve 103 and the sixth valve 106 are closed. The hot water released from the upper water distributor of the water tank 1 is sequentially passed through the first valve 101, the second valve 102 and the sixth valve 106, and then pumped by the water pump 2, and then passed through the seventh valve 107 to the primary side of the heat exchanger 3, and then cooled by heat exchange with the secondary side of the heat exchanger 3, and then passed through the fifth valve 105 to return to the lower water distributor of the water tank 1.

[0035] In the heat storage mode, the first valve 101, the third valve 103, the fourth valve 104, the sixth valve 106 and the seventh valve 107 are opened, and the second valve 102 and the fifth valve 105 are closed. The cold water released from the lower water distributor of the water tank 1 passes through the fourth valve 104 and the sixth valve 106 in sequence, is pressurized by the water pump 2, passes through the seventh valve 107 to the primary side of the heat exchanger 3, is heated by heat exchange with the secondary side of the heat exchanger 3, passes through the third valve 103 and the first valve 101 in sequence, and returns to the upper water distributor of the water tank 1.

[0036] In the cold release mode, the first valve 101, the third valve 103, the fourth valve 104, the sixth valve 106 and the seventh valve 107 are opened, and the second valve 102 and the fifth valve 105 are closed. The chilled water released from the lower water distributor of the water tank 1 passes through the fourth valve 104 and the sixth valve 106 in sequence, is pressurized by the water pump 2, passes through the seventh valve 107 to the primary side of the heat exchanger 3, is heated by heat exchange with the secondary side of the heat exchanger 3, passes through the third valve 103 and the first valve 101 in sequence, and returns to the upper water distributor of the water tank 1.

[0037] In the cold release mode, the first valve 101, the third valve 103, the fourth valve 104, the sixth valve 106 and the seventh valve 107 are opened, and the second valve 102 and the fifth valve 105 are closed. The chilled water released from the lower water distributor of the water tank 1 passes through the fourth valve 104 and the sixth valve 106 in sequence, is pressurized by the water pump 2, passes through the seventh valve 107 to the primary side of the heat exchanger 3, is heated by heat exchange with the secondary side of the heat exchanger 3, passes through the third valve 103 and the first valve 101 in sequence, and returns to the upper water distributor of the water tank 1.

[0038] A large commercial building is provided with a cold / heat storage water tank to reduce the power load. The equipment selection design and economic analysis are carried out, and the conclusion is that a 1200m 3 The water tank is coupled with the original air conditioning system of the building to supply energy, which can directly save operation cost of about 190,000 yuan per year, and the additional investment can be recovered in about 4 years, which has good economic efficiency and peak shaving advantage.

[0039] In summary, compared with the air conditioning system without water tank, the system can not only reduce the operation cost of the user side, but also play a role in peak shaving for the power grid side, which has good application prospect and economic benefit.

[0040] It should be understood that the examples and embodiments described herein are merely illustrative and not intended to limit the present application, and those skilled in the art can make various modifications or changes according to it, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A peak shaving based air conditioning system comprising a power supply main line, characterized in that, The water tank (1) is connected to the energy supply main pipeline through the heat exchanger (3), and a first energy supply pipeline, a second energy supply pipeline and a third energy supply pipeline are arranged between the water tank (1) and the heat exchanger (3) to change the flow direction of cold / hot water to adjust the working condition of cold storage / heat storage or cold release / heat release.

2. The valley-filling based air conditioning system of claim 1, wherein, The water tank (1) is provided with an upper water distributor and a lower water distributor vertically and spaced apart; In the cold storage or heat release working condition, cold water is injected from the lower water distributor to the water tank (1) through the primary side of the heat exchanger (3), and hot water is discharged from the water tank (1) through the upper water distributor, and the water quantity in the water tank (1) remains unchanged; In the cold release or heat storage working condition, cold water is transported to the primary side of the heat exchanger (3) through the lower water distributor, and hot water is returned to the water tank (1) through the upper water distributor.

3. The valley-filling based air conditioning system of claim 1, wherein, The first energy supply pipeline is led out from the upper water distributor of the water tank (1), sequentially passes through a first valve (101), a second valve (102), a sixth valve (106), a water pump (2) and a seventh valve (107), and is connected to the primary side of the heat exchanger (3).

4. The valley-filling based air conditioning system of claim 1, wherein, The second energy supply pipeline is led out from the lower water distributor of the water tank (1) and connected to the sixth valve (106) through a fourth valve (104).

5. The valley-filling based air conditioning system of claim 1, wherein, The third energy supply pipeline is led out from the primary side of the heat exchanger (3) and divided into two paths, one path is connected to the second valve (102) in the first energy supply pipeline through a third valve (103), and the other path is connected to the fourth valve (104) in the second energy supply pipeline through a fifth valve (105).

6. The valley-filling based air conditioning system of claim 1, wherein, The energy supply main pipeline is a main pipeline for heating or cooling, and the energy supply main pipeline and the first / second / third energy supply pipeline are separated by the heat exchanger (3).

7. The valley-filling based air conditioning system of claim 1, wherein, The heat exchanger (3) is a plate heat exchanger, the primary side of the heat exchanger (3) is a heat or cold supply side for supplying energy to the secondary side, and the secondary side of the heat exchanger (3) is a heat or cold receiving side for supplying energy to the user end.

8. The valley-filling based air conditioning system of claim 3, wherein, The water pump (2) is arranged in the pipeline for supplying water, and valves for water flow on-off are arranged at both ends of the water pump (2).

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