Energy-saving marine central air-conditioning system

Abstract

The utility model discloses an energy-saving central air-conditioning system for a ship, which comprises a refrigerant water circulation loop consisting of a fan coil, a water chilling unit and a refrigerant water pump, and further comprises a seawater and fresh water plate heat exchanger which is connected in parallel with the water chilling unit to form a refrigerant water system. And an auxiliary system consisting of an isolation water replenishing meter, an exhaust device and a sealed pressure expansion tank is also arranged. The system can reduce energy consumption and save energy, and has the advantages of high efficiency and stability in system operation.

Description

Technical Field

[0001] The utility model relates to the field of marine air conditioning, in particular to an energy-saving marine central air conditioning system. Background Art

[0002] With the vigorous development of my country's shipbuilding industry, my country's total shipbuilding tonnage has jumped to the first place in the world. my country's shipbuilding industry has been slowly moving from a large total to high-quality development. Energy conservation, emission reduction and low carbon are also the development trend of the whole society, which requires all fields related to the shipbuilding industry to continuously optimize their products. In the marine central air-conditioning chilled water system, the previous model is to provide a cold source for the air-conditioning terminal for the chiller, and the operating power of the chiller is generally large, ranging from tens of kilowatts to hundreds of kilowatts, becoming a large electricity consumer on board, and there is a problem of high energy consumption. Utility Model Content

[0003] The utility model provides an energy-saving marine central air-conditioning system to solve the problem of high energy consumption of marine chillers in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An energy-saving marine central air conditioning system comprises a fan coil unit (8), a refrigerant water pump (9), and a chiller (5), wherein the outlet of the fan coil unit (8) is connected to the inlet of the refrigerant water pump (9) via a pipeline, the outlet of the refrigerant water pump (9) is connected to the inlet of the chiller (5) via a pipeline, and the outlet of the chiller (5) is connected to the inlet of the fan coil unit (8) via a pipeline. The system is characterized in that it further comprises a seawater plate heat exchanger (4), the seawater plate heat exchanger (4) is connected in parallel to the chiller (5) via a pipeline, and the inlet pipeline of the chiller (5) and the inlet pipeline of the seawater plate heat exchanger (4) are respectively connected and installed with a stop valve, so that the refrigerant water system thus constituted uses the chiller (5) or the seawater plate heat exchanger (4) as a cold source.

[0006] Furthermore, it also includes an exhaust device (2), a water inlet of the exhaust device (2) is connected to the pipeline in the refrigerant water system, a water outlet of the exhaust device is connected to the pipeline in the refrigerant water system, and an exhaust port of the exhaust device (2) is connected to the external environment.

[0007] Furthermore, it also includes an isolation water replenishment device (1), the inlet of the isolation water replenishment device (1) is connected to the water supply system on board, and the outlet of the isolation water replenishment device (1) is connected to another water inlet of the exhaust device (2).

[0008] Furthermore, it also includes a closed pressure expansion tank (3), the inlet of the closed pressure expansion tank (3) is connected to the pipeline in the refrigerant water system, and the drain port of the closed pressure expansion tank is connected to the sewage pipe on the ship.

[0009] In the utility model, due to the addition of the seawater plate heat exchanger, the chiller can be replaced in the season when the weather is not too hot to provide a cold source for the fan coil at the end of the air conditioner, which can greatly reduce the startup time of the chiller, reduce power consumption, save energy, and also avoid the noise of the chiller, making life and living on the ship more comfortable.

[0010] In the utility model, the exhaust device itself is equipped with a working water pump, through which the water containing air in the refrigerant water system pipeline can be sucked into the exhaust device, degassed in the exhaust device and then sent to the pipeline of the refrigerant water system, and the removed air is discharged from the exhaust port of the exhaust device. The isolated water replenishment meter transports water from the ship's water supply system to the exhaust device, removes air through the exhaust device and then replenishes it to the pipeline of the refrigerant water system. The isolated water replenishment meter can prevent the water of the refrigerant water system from flowing back into the ship's water supply system to pollute the ship's water supply system, and can also automatically determine the timing and amount of water replenishment according to the set pressure to achieve automatic water replenishment. The closed pressure expansion tank is used to balance the pressure of the pipeline in the refrigerant water system. The auxiliary system is composed of the isolated water replenishment meter, the exhaust device and the closed pressure expansion tank, which realizes the functions of automatic water replenishment, exhaust, pressure stabilization and water discharge of the refrigerant water system of the air-conditioning system, making the operation of the refrigerant water system more efficient and stable.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model adopts a sea-fresh water plate heat exchanger connected in parallel with a chiller, which can be used as a cold source for air conditioning. In non-extremely hot weather, the sea-fresh water plate heat exchanger can replace the chiller to provide a cold source, which can greatly save the power consumption of the air conditioner and reduce the noise on board.

[0013] 2. Compared with the traditional air conditioning water replenishment type, the utility model adopts an isolated water replenishment meter to minimize the water backflow from the air conditioning system to the domestic water system, effectively reducing the probability of domestic water on board being contaminated.

[0014] 3. Due to the addition of the exhaust device, the utility model can timely remove the air in the air conditioning water system, reduce the air content in the water system, thereby reducing the cavitation of the water pump and improving the working efficiency of the refrigerant water system.

[0015] 4. Due to the addition of the closed pressure expansion tank, the utility model can realize automatic pressure relief, water discharge and stabilization of the pressure in the system when the system pressure is too high, reduce the probability of water hammer in the system, and improve the working stability and reliability of the whole system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of an energy-saving marine central air-conditioning system. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, this embodiment discloses an energy-saving marine central air-conditioning system, including a refrigerant water system consisting of a fan coil 8, a refrigerant water pump 9, a chiller 5, and a seawater plate heat exchanger 4. In the refrigerant water system, the outlet of the fan coil 8 is connected to the inlet of the refrigerant water pump 9 through a pipeline, and the outlet of the refrigerant water pump 9 has two pipelines, one of which is connected to the inlet of the chiller 5, and the other is connected to the inlet of the seawater plate heat exchanger 4. The outlet of the chiller 5 and the outlet of the seawater plate heat exchanger 4 are respectively connected to the inlet of the fan coil 8 through pipelines, thereby forming a refrigerant water system, with the seawater plate heat exchanger 4 or the chiller 5 as a cold source, and heat exchange is completed through the seawater plate heat exchanger 4 or the chiller 5 and the fan coil 8, so as to achieve the purpose of cooling and cooling each cabin of the ship. Among them, the inlet pipeline of the chiller 5 is connected to a marine stop valve II6, and the inlet pipeline of the seawater plate heat exchanger 4 is connected to a marine stop valve I7. The two marine stop valves are used to switch different cold sources in the refrigerant water system.

[0019] This embodiment also includes an auxiliary system consisting of an isolation water replenishment meter 1, an exhaust device 2, and a closed pressure expansion tank 3. Among them:

[0020] The inlet of the isolation water make-up meter 1 is connected to the ship's water supply system. A check valve is arranged inside the isolation water make-up meter 1 to prevent water from the refrigerant water system from flowing back into the ship's water supply system and polluting the ship's water supply system. The outlet of the isolation water make-up meter 1 is connected to a water inlet of the exhaust device 2 through a pipeline.

[0021] The second water inlet of the exhaust device 2 is connected to the pipeline in the refrigerant water system through a pipeline, and the exhaust device 2 has a water outlet connected to the pipeline in the refrigerant water system through a pipeline, such as Figure 1 As shown, in this embodiment, the second water inlet and the water outlet of the exhaust device 2 are respectively connected to different positions of the pipeline between the fan coil 8 and the refrigerant water pump 9 through pipelines. The exhaust port of the exhaust device 2 leads to the external environment.

[0022] The inlet of the closed pressure expansion tank 3 is connected to the pipeline in the refrigerant water system through a pipeline, such as Figure 1 As shown, in this embodiment, the inlet of the closed pressure expansion tank 3 is connected to the fan coil 8 and the refrigerant water pump 9 through a pipeline. The outlet of the closed pressure expansion tank 3 is connected to the sewage pipe on the ship.

[0023] The isolated water replenishment meter 1 can automatically determine the water replenishment timing and water replenishment amount according to the set pressure to realize automatic water replenishment. During water replenishment, the isolated water replenishment meter 1 transports water from the ship's water supply system to the exhaust device 2, and removes the air in the replenished water through the exhaust device 2, reducing the entry of air during water replenishment. The water with air removed is finally sent to the pipeline of the refrigerant water system through the water outlet of the exhaust device 2, thereby realizing the water replenishment function.

[0024] The second water inlet and outlet of the exhaust device 2 are connected to different positions of the pipeline between the fan coil 8 and the refrigerant water pump 9 through pipelines, respectively, to remove water from the refrigerant water system pipeline. Among them, the distance between the connection positions of the second water inlet and the water outlet on the refrigerant water pipeline is not less than 500mm to ensure the efficient operation of the exhaust device 2. If the distance is too small, the refrigerant water after degassing may be sucked into the exhaust device 2 again, which will reduce the working efficiency of the exhaust device 2. The exhaust device 2 itself is equipped with a working water pump, through which the water containing air in the refrigerant water system is sucked into the exhaust device 2, and the water is degassed and then sent to the pipeline of the refrigerant water system 2. The removed air is discharged from the exhaust port of the exhaust device 2.

[0025] The closed pressure expansion tank 3 is connected to the pipeline in the refrigerant water system through a pipeline to balance the pressure in the pipeline of the refrigerant water system.

[0026] Therefore, through the auxiliary system, the functions of automatic water replenishment, exhaust, pressure stabilization and water discharge of the refrigerant water system of the air-conditioning system can be realized, making the operation of the refrigerant water system more efficient and stable.

[0027] The major energy consumer and main noise source in the marine air-conditioning system comes from the chiller, which generally consumes more than 80% of the energy of the entire air-conditioning system. The noise of the chiller is generally above 75dB (A). In this embodiment, a seawater plate heat exchanger 4 is added. The seawater plate heat exchanger 4 and the chiller 5 are connected in parallel. They can both be used as the cold source of the air conditioner. In non-extremely hot weather, the seawater plate heat exchanger 4 can replace the chiller 5 to provide a cold source, and the chiller 5 does not need to be started. This can greatly save the power consumption of the air conditioner and reduce the noise on board.

[0028] The isolated water replenishment meter 1 used in this embodiment can minimize the water in the air-conditioning system from flowing back to the domestic water system, thereby effectively reducing the probability of domestic water on board being contaminated.

[0029] The exhaust device 2 adopted in this embodiment can timely remove the air in the air-conditioning water system, reduce the air content in the water system, thereby reducing cavitation of the water pump and improving the working efficiency and reliability of the water pump. The low air content in the refrigerant water system can make the heat exchange coil in the fan coil 8 filled with refrigerant water as much as possible, thereby improving the heat exchange efficiency of the fan coil 8. On the contrary, if the heat exchange coil contains a large amount of air, it will occupy a large amount of effective heat exchange area of ​​the coil, thereby reducing the heat exchange efficiency.

[0030] The diaphragm bag of the closed pressure expansion tank 3 used in this embodiment can compensate for the volume change of the refrigerant water caused by thermal expansion and contraction, stabilize the pressure in the system, reduce the probability of water hammer in the system, and improve the working stability and reliability of the entire system.

[0031] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. Such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0032] The present invention is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. An energy-saving marine central air conditioning system, comprising a fan coil unit (8), a refrigerant water pump (9), and a chiller (5), wherein the outlet of the fan coil unit (8) is connected to the inlet of the refrigerant water pump (9) through a pipeline, the outlet of the refrigerant water pump (9) is connected to the inlet of the chiller (5) through a pipeline, and the outlet of the chiller (5) is connected to the inlet of the fan coil unit (8) through a pipeline, characterized in that: It also includes a seawater plate heat exchanger (4), the seawater plate heat exchanger (4) being connected in parallel to the water chiller (5) via a pipeline, and the inlet pipeline of the water chiller (5) and the inlet pipeline of the seawater plate heat exchanger (4) are respectively connected to each other and are equipped with a stop valve, so that the refrigerant water system thus formed uses the water chiller (5) or the seawater plate heat exchanger (4) as a cold source.

2. An energy-saving marine central air-conditioning system according to claim 1, characterized in that: It also includes an exhaust device (2), a water inlet of the exhaust device (2) being connected to a pipeline in the refrigerant water system, a water outlet of the exhaust device being connected to a pipeline in the refrigerant water system, and an exhaust port of the exhaust device (2) leading to the external environment.

3. An energy-saving marine central air-conditioning system according to claim 2, characterized in that: It also includes an isolation water replenishment device (1), the inlet of the isolation water replenishment device (1) is connected to the water supply system on board, and the outlet of the isolation water replenishment device (1) is connected to another water inlet of the exhaust device (2).

4. An energy-saving marine central air-conditioning system according to any one of claims 1 to 3, characterized in that: It also includes a closed pressure expansion tank (3), the inlet of the closed pressure expansion tank (3) is connected to the pipeline in the refrigerant water system, and the drain port of the closed pressure expansion tank is connected to the sewage pipe on board.

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