An intelligent cold source high-efficiency pipeline system

Abstract

The present application provides an efficient pipeline system for an intelligent cold source, which includes connecting pipelines and valves among common cooling towers, chillers, plate heat exchangers, and water pumps. After all the cooling towers, chillers, plate heat exchangers, and water pumps are first connected in parallel through pipelines and valves and grouped, they are then connected as needed, and three electric valves are used to achieve the three-mode switching of mechanical refrigeration, hybrid refrigeration, and natural cooling.

Description

Technical Field

[0001] This application relates to a large-scale air-conditioning cold source system for year-round refrigeration, and more particularly to an intelligent cold source efficient pipeline system. Background Art

[0002] In data center scenarios, purification plants, electronic workshops and other similar scenarios, due to their importance, huge losses caused by service interruption, and large heat loads throughout the year, there is a need for continuous year-round cooling.

[0003] In typical applications, in order to make full use of natural cold sources, the method of "cooling tower + plate heat exchanger + water-cooled chiller + circulation pump" is often adopted to reduce the system operation cost. For the convenience of use and maintenance, chillers, plate heat exchangers, and cooling towers are often connected in series to form a set of cold sources, and then multiple sets of cold sources are connected in parallel as needed to provide refrigeration capacity for the site. At present, due to the booming development of the industry and the accumulation of professional experience, the following three trends have emerged: A: The application method of decoupling the cooling tower, that is, the cooling towers are first connected in parallel in groups and then connected in series with other cold source parts; B: The application method of decoupling the chilled water pump, that is, the chilled water circulation pumps are connected in parallel in groups and then connected in series with other cold source parts; C: The application method of decoupling the cooling water pump, that is, the cooling water circulation pumps are connected in parallel in groups and then connected in series with other cold source parts; among which B is relatively mature, and the application ratios of A and C are still relatively small. However, due to various reasons, most pipelines either have a large investment and waste of unnecessary valves or perform poorly in terms of energy-saving benefits, which is not conducive to energy conservation, emission reduction, cost reduction and efficiency improvement. Summary of the Invention

[0004] Based on this, this application provides an efficient pipeline system for an intelligent cold source, which can achieve greater energy conservation, while ensuring the high reliability of the system, streamlining pipelines and valves, avoiding unnecessary valve and pipeline investments, and saving both the initial investment of the pipeline system and the system operation cost.

[0005] The technical solution provided by this application to solve the technical problem is as follows: On the cooling side, first connect multiple cooling towers, multiple plate heat exchangers, multiple chillers, and multiple cooling water circulation pumps respectively through the cooling water supply and return branch pipelines and valves to form a cooling tower group, a plate heat exchanger group, a chiller group, and a cooling water pump group, and then connect them through the cooling water supply and return pipelines and valves. And connect the main cooling water inlet pipe entering the plate heat exchanger group to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; at the same time, connect the main cooling water outlet pipe leaving the plate heat exchanger group to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; at the same time, connect the main cooling water outlet pipe leaving the plate heat exchanger group to the main cooling water outlet pipe leaving the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; for these three electric switch valves, when their selected specifications are huge and uneconomical, parallel pipelines can also be added to split one electric valve into two or even more valves, but the number shall not exceed the lower value of the number of parallel chillers and plate heat exchangers.

[0006] At the same time, on the chilled water side, first connect multiple plate heat exchangers, multiple chillers, and multiple chilled water circulation pumps respectively through the chilled water supply and return branch pipelines and valves to form a plate heat exchanger group, a chiller group, and a chilled water pump group, and then connect them through the chilled water supply and return pipelines and valves. And connect the main chilled water inlet pipe entering the plate heat exchanger group to the main chilled water inlet pipe entering the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; at the same time, connect the main chilled water outlet pipe leaving the plate heat exchanger group to the main chilled water inlet pipe entering the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; at the same time, connect the main chilled water outlet pipe leaving the plate heat exchanger group to the main chilled water outlet pipe leaving the chiller group through a section of pipeline, and set an electric switch valve on this section of connecting pipeline; for these three electric switch valves, when their selected specifications are huge and uneconomical, parallel pipelines can also be added to split one electric valve into two or even more valves, but the number shall not exceed the lower value of the number of parallel chillers and plate heat exchangers.

[0007] At the same time, only 1 manual valve, 0 electric control valves, and 0 electric switch valves are respectively set on the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes entering and leaving the plate heat exchanger group to each plate heat exchanger;

[0008] At the same time, only 1 manual valve, 0 electric control valves, and 0 electric switch valves are set on the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes entering the chiller group to each chiller;

[0009] Meanwhile, only 0 manual valves, 0 electric control valves and 1 electric shut-off valve are provided on the chilled water and cooling water main pipes of the chilled water unit and the chilled water and cooling water branch pipes connecting each chilled water unit;

[0010] Meanwhile, on the chilled water and cooling water main pipes of the chilled water unit for the inlet and outlet of chilled water and cooling water, 1 manual valve is respectively provided on both sides of the connection between the main pipe and the chilled water and cooling water branch pipes connecting each chilled water unit;

[0011] Meanwhile, only 1 manual valve, 0 electric control valves and 0 electric shut-off valves are respectively provided on the chilled water and cooling water main pipes of the chilled water pump unit and the cooling water pump unit for the inlet and outlet of chilled water and cooling water and the chilled water and cooling water branch pipes connecting each chilled water pump and cooling water pump;

[0012] Meanwhile, on the chilled water and cooling water main pipes of the chilled water pump unit and the cooling water pump unit for the inlet and outlet of chilled water and cooling water, 1 manual valve is respectively provided on both sides of the connection between the main pipe and the chilled water and cooling water branch pipes connecting each chilled water pump and cooling water pump;

[0013] As can be seen from the above solutions, the present application can decouple the design and use lock of the chilled water unit, plate heat exchanger, cooling tower, chilled water and cooling water pumps. The single equipment capacity and quantity can be designed separately and independently according to the actual economic requirements, which is beneficial to making greater use of natural cooling by increasing the single equipment capacity or quantity of the plate heat exchanger and cooling tower, and saving the annual energy consumption of the overall cold source. In addition, since the present application realizes the three-mode switching of mechanical refrigeration, hybrid cooling and natural cooling that originally required four electric valves through three electric valves between the plate heat exchanger group and the chiller unit, and only an electric valve is provided on the outlet branch pipe of the chiller, while the electric valves on the branch pipes for the inlet and outlet of the plate heat exchanger are cancelled, the investment in electric valves for the construction of the overall cold source can be greatly saved ultimately. Description of the Drawings

[0014] In order to more clearly illustrate the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of a general embodiment of the present application.

[0016] Figure 2 It is a schematic structural diagram of an embodiment of the present application that pays more attention to safety and reliability. The definitions of the markings are Figure 1 the same, and the difference is that in order to improve safety, two sets of three-valve switching systems are provided between the plate heat exchanger and the chiller. When any single fault occurs, the high-efficiency operation of the system can still be ensured. Detailed implementation mode

[0017] As Figure 1 shown, if this figure is regarded as the cooling source cooling water system diagram, it can be known that the high-efficiency pipeline system of the present application connects the cooling tower (not shown in this figure, but ordinary professionals in the industry can easily draw it according to the attached drawings and descriptions), heat exchanger 2, chiller 1, and cooling water pump 3 respectively through connecting branch pipes to form a cooling tower group, a heat exchanger group, a chiller group, and a cooling water pump group, and then connects them through the cooling water supply and return pipelines and valves. And on the main cooling water inlet pipe entering the heat exchanger group, it is connected to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and an electric switch valve 4-B is arranged on this section of connecting pipeline; at the same time, on the main cooling water outlet pipe leaving the heat exchanger group, it is connected to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and an electric switch valve 4-C is arranged on this section of connecting pipeline; at the same time, on the main cooling water outlet pipe leaving the heat exchanger group, it is connected to the main cooling water outlet pipe leaving the chiller group through a section of pipeline, and an electric switch valve 4-A is arranged on this section of connecting pipeline;

[0018] At the same time, only one manual valve 9-2A and 9-2B are respectively arranged on the inlet and outlet cooling water branch pipes connected to each heat exchanger 2;

[0019] At the same time, only one manual valve 9-1A is arranged on the cooling water inlet branch pipe entering each chiller 1 connected to each chiller;

[0020] At the same time, only one electric switch valve 4-1B is arranged on the chilled cooling water outlet branch pipe leaving each chiller connected to each chiller;

[0021] At the same time, on the main cooling water pipes for cooling water to enter and leave the chiller group, one manual valve 9-1 is respectively arranged on both sides of the connection of the chilled cooling water branch pipes to each chiller;

[0022] At the same time, only one manual valve 9-3A and 9-3B are respectively arranged on the inlet and outlet cooling water branch pipes for cooling water to enter and leave the cooling water pump 3;

[0023] At the same time, on the main cooling water pipes for cooling water to enter and leave the cooling water pump group, one manual valve 9-3 is respectively arranged on both sides of the connection of the chilled cooling water branch pipes to each cooling water pump;

[0024] In the figure, 5678 are the B-way cooling water outlet pipe, B-way cooling water inlet pipe, A-way cooling water inlet pipe, and A-way cooling water outlet pipe. During normal and efficient operation, the valve 9-A is closed, and water enters through the A-way, and the A and B ways discharge water. While making the best use of natural cooling to the greatest extent, it reduces the construction investment and reduces the outlet resistance, and saves the energy consumption of the system water pump again. Only the valves for indicating the switching and control functions are shown in the figure. As for filters, etc., they are not shown in the figure, which does not mean they are not needed.

[0025] Schematic diagram of the connection structure on the chilled water side. It can be simply regarded as the chilled water system of the cold source, and the same can be obtained. Figure 1 When the valve 4-A is opened and other electric valves (4-B, 4-C, 4-1B) are closed, the cold source system enters the natural cooling mode, and the chilled cooling water only exchanges heat through the plate heat exchanger;

[0026] When the valve 4-A is opened and other electric valves (4-B, 4-C, 4-1B) are closed, the cold source system enters the natural cooling mode, and the chilled cooling water only exchanges heat through the plate heat exchanger;

[0027] When 4-B and 4-1B are opened and other valves (4-A, 4-C) are closed, the cold source system enters the mechanical refrigeration mode, and the chilled cooling water only exchanges heat through the chiller;

[0028] When 4-C and 4-1B are opened and other valves (4-A, 4-B) are closed, the cold source system enters the hybrid refrigeration mode. The chilled cooling water first exchanges heat through the plate heat exchanger for pre-heat exchange, and then enters the chiller for heat exchange;

[0029] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that modifications or equivalent replacements can still be made to the specific implementation manners of the present application. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application shall be covered by the scope of the claims of the present application.

Claims

1. An intelligent cold source high-efficiency pipeline system, characterized in that: at On the cooling side, through the cooling water supply and return branch pipelines and valves, multiple cooling towers, multiple plate heat exchangers, multiple chillers, and multiple cooling water circulation pumps are first connected respectively to form a cooling tower group, a plate heat exchanger group, a chiller group, and a cooling water pump group, and then they are connected through the cooling water supply and return pipelines and valves; On the main cooling water inlet pipe entering the plate heat exchanger group, it is connected to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; at the same time, on the main cooling water outlet pipe leaving the plate heat exchanger group, it is connected to the main cooling water inlet pipe entering the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; at the same time, on the main cooling water outlet pipe leaving the plate heat exchanger group, it is connected to the main cooling water outlet pipe leaving the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; On the chilled water side, through the chilled water supply and return branch pipelines and valves, multiple plate heat exchangers, multiple chillers, and multiple chilled water circulation pumps are first connected respectively to form a plate heat exchanger group, a chiller group, and a chilled water pump group, and then they are connected through the chilled water supply and return pipelines and valves; On the main chilled water inlet pipe entering the plate heat exchanger group, it is connected to the main chilled water inlet pipe entering the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; at the same time, on the main chilled water outlet pipe leaving the plate heat exchanger group, it is connected to the main chilled water inlet pipe entering the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; at the same time, on the main chilled water outlet pipe leaving the plate heat exchanger group, it is connected to the main chilled water outlet pipe leaving the chiller group through a section of pipeline, and an electric shut-off valve is set on this section of the connecting pipeline; On the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes entering and leaving the plate heat exchanger group to each plate heat exchanger, only 1 manual valve, 0 electric control valves, and 0 electric shut-off valves are respectively set; at the same time, on the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes entering the chiller group to each chiller, only 1 manual valve, 0 electric control valves, and 0 electric shut-off valves are set; at the same time, on the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes leaving the chiller group to each chiller, only 0 manual valves, 0 electric control valves, and 1 electric shut-off valve are set; at the same time, on the main chilled water and cooling water pipes entering and leaving the chiller group, 1 manual valve is respectively set on both sides of the connection of the chilled water and cooling water branch pipes to each chiller; at the same time, on the chilled water and cooling water branch pipes connecting the main chilled water and cooling water pipes entering and leaving the chilled water pump group and the cooling water pump group to each chilled water pump and cooling water pump, only 1 manual valve, 0 electric control valves, and 0 electric shut-off valves are respectively set; at the same time, on the main chilled water and cooling water pipes entering and leaving the chilled water pump group and the cooling water pump group, 1 manual valve is respectively set on both sides of the connection of the main pipe to the chilled water and cooling water branch pipes of each chilled water pump and cooling water pump.

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