Ice slurry energy storage and phase change cooling system based on deep high-salinity mine water

Abstract

The invention belongs to the technical field of energy utilization, and particularly relates to an ice slurry energy storage and phase change cooling system based on deep hypersalinity mine water, comprising: a refrigerator for cooling high salinity mine water and making the high salinity mine water form ice slurry; the ice slurry energy storage tank is used for storing ice slurry; the phase change cold storage device is used for storing the cold energy released by the ice slurry energy storage tank and cooling the energy storage power station and the interior of the building; the high-salt mine water subjected to heat exchange flows back into the deep mine; and the water potential energy power generation device converts the potential energy of the high-salt mine well water into electric energy and stores the electric energy in the energy storage power station. According to the system, gradient utilization of energy is achieved, closed-loop ecology of cold energy storage, potential energy power generation and power grid interaction is constructed, an innovative normal form is provided for deep mine water resource utilization and distributed energy storage, and the comprehensive energy utilization rate is remarkably increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy utilization, and particularly relates to an ice slurry energy storage and phase change cooling system based on deep high salinity mine water. Background Art

[0002] With the continuous growth of energy demand and the increasing awareness of environmental protection, the development of efficient and environmentally friendly energy storage and utilization technologies has become a hot topic in current scientific research. In the fields of mine cooling, energy storage battery thermal management, and building cooling, traditional cooling and energy storage methods face problems such as low efficiency, high cost, and environmental pollution.

[0003] Therefore, the development of new efficient energy storage and cooling technologies is of great significance. Summary of the Invention

[0004] The purpose of the present invention is to provide an ice slurry energy storage and phase change cooling system based on deep high salinity mine water to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the present invention provides an ice slurry energy storage and phase change cooling system based on deep high salinity mine water, including:

[0006] A refrigerator, which is used to cool the high-salt mine water and form ice slurry;

[0007] An ice slurry energy storage tank, which is used to store the ice slurry;

[0008] A phase change cold energy storage device, which is used to store the cold energy released by the ice slurry energy storage tank and cool the energy storage power station and the indoor of the building; the high-salt mine water after heat exchange flows back to the deep mine;

[0009] A water potential energy power generation device, which converts the potential energy of the high-salt mine water into electric energy and stores it in the energy storage power station.

[0010] Preferably, the water potential energy power generation device includes a liquid driving mechanism, a liquid releasing mechanism, and a generator. The liquid driving mechanism rotates by using the potential energy of the high-salt mine water. The liquid driving mechanism is in transmission cooperation with the generator. The liquid driving mechanism includes a transmission chain assembly. A plurality of water transporting members are arranged on the transmission chain assembly. The water transporting members are used to transport the high-salt mine water. The liquid releasing mechanism is used to release the high-salt mine water in the water transporting members and make the high-salt mine water flow back to the deep mine.

[0011] Preferably, the transmission chain assembly includes two sprockets. One sprocket is arranged at the wellhead of the deep mine, and the other sprocket is arranged at the bottom of the deep mine. The two sprockets are in transmission cooperation through a chain. A plurality of water transporting members are arranged on the chain at equal intervals. The rotating shaft of the sprocket is in transmission cooperation with the generator.

[0012] Preferably, the water transporting member includes a water tank hinged on the chain. An outlet is provided on one side of the water tank away from the chain. A blocking assembly is arranged between the opposite side walls of the water tank. The blocking assembly is used for blocking the outlet.

[0013] Preferably, the blocking assembly includes a rotating shaft rotatably connected to the opposite side walls of the water tank. A blocking plate is connected between the two rotating shafts. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring is fixedly connected to the blocking plate, and the other end of the torsion spring is connected to the side wall of the water tank.

[0014] Preferably, a sealing gasket is arranged on one side of the water tank close to the outlet.

[0015] Preferably, the liquid release mechanism includes a support assembly arranged on the inner wall of the deep mine, and the support assembly is arranged close to the liquid level of the deep mine. A triggering assembly is arranged on the support assembly. The blocking plate is flipped through the triggering assembly.

[0016] Preferably, the triggering assembly includes a rack arranged on the support assembly. One end of the rotating shaft away from the blocking plate penetrates through the side wall of the water tank and is connected with a gear. The gear meshes with the rack.

[0017] Preferably, the support assembly includes a fixing frame fixedly connected to the inner wall of the deep mine. The fixing frame is arranged horizontally. A support frame is vertically connected to the bottom end of the fixing frame. The rack is hinged to one end of the fixing frame close to the chain. One end of a spring is connected to the bottom end of the rack, and the other end of the spring is connected to the support frame. The spring is arranged parallel to the fixing frame.

[0018] Preferably, a drain pipe is arranged at the wellhead of the deep mine. The drain pipe is arranged corresponding to the water transporting member. A water-cooled air conditioner is arranged in the building room. The water-cooled air conditioner exchanges heat with the phase change cold storage device and releases the cold energy to the building room. The water outlet end of the water-cooled air conditioner is communicated with the drain pipe.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The present invention realizes cascaded energy utilization, constructs a closed-loop ecosystem of "cold energy storage - potential energy power generation - power grid interaction", provides an innovative paradigm for the utilization of deep mine water resources and distributed energy storage, and significantly improves the comprehensive energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:

[0022] Figure 1 FIG. 1 is an overall schematic diagram of an ice slurry energy storage and phase change cooling system based on deep high salinity mine water proposed by the present invention;

[0023] Figure 2 FIG. 2 Figure 1 is a partial enlarged view of part A in FIG. 1;

[0024] Figure 3 FIG. 3 is a sectional view of the water conveying member;

[0025] Wherein: 1, a refrigerating machine; 2, a water-cooled air conditioner; 3, an ice slurry energy storage tank; 4, a phase change cold storage device; 5, an energy storage power station; 6, a deep mine; 7, a water potential energy power generation device; 701, a rotating shaft; 702, a sprocket; 703, a chain; 704, a water tank; 705, a gasket; 706, a water outlet; 707, a plug plate; 708, a rotating shaft; 709, a torsion spring; 710, a support frame; 711, a fixing frame; 712, a gear; 713, a hinge seat; 714, a rack; 715, a spring; 716, a drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0028] The following explains the technical terms involved in this embodiment as follows:

[0029] A refrigerator is a type of heat engine. Its core function is to transfer heat from a low-temperature heat source to a high-temperature heat source through a thermodynamic cycle to achieve artificial refrigeration.

[0030] The ice slurry energy storage tank is the core equipment in the ice slurry energy storage system. Its function is to achieve long-term storage and on-demand release of cold energy by storing the solid-liquid mixture ice slurry containing ice crystals. The following is an analysis from four dimensions: structural characteristics, working principle, technical advantages, and application scenarios:

[0031] 1. Structural characteristics

[0032] Double-layer vacuum adiabatic tank: The inner tank is made of 304 stainless steel or titanium alloy to resist high-salt corrosion, and the outer tank is wrapped with polyurethane foam or a high-vacuum multi-layer adiabatic layer, with a cold loss rate ≤ 0.5 °C / day.

[0033] Dynamic stirring system: It is equipped with a propeller or scraper agitator inside, and is combined with a circulation pump such as a screw pump to prevent ice crystal blockage and keep the solid-phase ratio IPF of the ice slurry uniform, usually 20 - 30%.

[0034] Multi-parameter sensor: Integrates a temperature sensor, a pressure sensor, and an ice crystal particle size detector to monitor the state of the ice slurry in real time and feedback it to the control system.

[0035] The phase change cold storage device is a key equipment in the field of thermal energy storage. It absorbs or releases a large amount of latent heat through the phase change of phase change materials during physical state changes such as solidification / melting, solidification / sublimation, to achieve long-term storage of cold energy and temperature control. The following is an analysis from technical principle, core components, advantageous characteristics, application scenarios, and innovation directions:

[0036] 1. Technical principle

[0037] Utilization of phase change latent heat:

[0038] PCM undergoes a phase change near the phase change temperature, such as paraffin at 20 - 30 °C and hydrated salt at 0 - 10 °C, absorbing / releasing latent heat, such as the latent heat of paraffin being about 200 kJ / kg, and the cold storage density is 5 - 10 times that of sensible heat storage.

[0039] Thermodynamic cycle:

[0040] The refrigerator 1 makes ice during the low electricity price period at night, and the cold energy released by the ice slurry energy storage tank 3 is stored through the solidification of PCM; during the peak period during the day, the PCM melts to release cold, driving an absorption refrigerator or an air-conditioning terminal.

[0041] 2. Core components

[0042] Encapsulation material:

[0043] HDPE microcapsules or metal foam are used to encapsulate PCM to prevent leakage and enhance thermal conductivity.

[0044] Heat exchange system:

[0045] Built-in spiral copper tubes or finned heat exchangers to increase the heat transfer area by 10 - 20 m2 / m3 and improve the charging / discharging cooling rate.

[0046] Insulation layer:

[0047] Wrapped with vacuum insulation panel VIP or aerogel felt, with a cold loss rate ≤ 0.3 °C / day.

[0048] 2. Working principle

[0049] Cooling charging stage: The refrigerating machine 1 cools the high-salt mine water to below the freezing point, -2 to 0 °C, and the generated ice slurry is transported to the energy storage tank through the heat-insulating pipeline for stratified storage.

[0050] Cooling discharging stage: The ice slurry is pumped to the heat exchanger or directly for cooling. The ice crystals melt to release the latent heat of 334 kJ / kg. At the same time, the phase change energy storage device 4 absorbs the remaining cold energy to extend the cooling time.

[0051] Water-cooled air conditioner is an air-conditioning technology that uses water as the cooling medium. Its core advantages lie in efficient heat dissipation and energy saving, especially suitable for indoor buildings.

[0052] Refer to Figures 1 to 3 As shown, the present invention provides an ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water, including:

[0053] Refrigerating machine 1, which is used to cool the high-salt mine water and form ice slurry;

[0054] Ice slurry energy storage tank 3, which is used to store ice slurry;

[0055] Phase change energy storage device 4, which is used to store the cold energy released by the ice slurry energy storage tank 3 and cool the energy storage power station 5 and the indoor of the building; the high-salt mine water after heat exchange flows back into the deep mine 6;

[0056] Water potential energy power generation device 7, which converts the potential energy of the high-salt mine water into electric energy and stores it in the energy storage power station 5.

[0057] In this embodiment, heat exchange is carried out through a heat exchanger; when in use, the refrigerator 1 is powered at night during off-peak electricity consumption periods, thereby cooling the high-salt mine water to form ice slurry and storing it in the ice slurry energy storage tank 3. During the day, the ice slurry energy storage tank 3 releases cold energy to the phase change cold energy storage device 4, which can achieve long-term cold energy buffering and cool the energy storage power station 5. At the same time, heat exchange is used to cool the water-cooled air conditioner 2, and the water-cooled air conditioner 2 cools the indoor of the building. Subsequently, the high-salt mine water flows back into the deep mine 6, and the potential energy is converted into electric energy and stored in the energy storage power station 5. The energy storage power station 5 can store the peak-valley electricity price difference electric energy, and cooperate with the ice slurry cold energy to achieve two-way peak shaving of "electricity-cooling".

[0058] The present invention realizes cascaded utilization of energy, constructs a closed-loop ecosystem of "cold energy storage-potential energy power generation-power grid interaction", provides an innovative paradigm for the utilization of deep mine water resources and distributed energy storage, and significantly improves the comprehensive energy utilization rate.

[0059] Furthermore, the water potential energy power generation device 7 includes a liquid driving mechanism, a liquid releasing mechanism and a generator. The liquid driving mechanism rotates by using the potential energy of the high-salt mine water. The liquid driving mechanism is in transmission cooperation with the generator. The liquid driving mechanism includes a transmission chain assembly. A plurality of water transporting members are arranged on the transmission chain assembly. The water transporting members are used for transporting the high-salt mine water. The liquid releasing mechanism is used for releasing the high-salt mine water in the water transporting members and enabling the high-salt mine water to flow back into the deep mine 6.

[0060] Furthermore, the transmission chain assembly includes two sprockets 702. One sprocket 702 is arranged at the wellhead of the deep mine 6, and the other sprocket 702 is arranged at the bottom of the deep mine 6. The two sprockets 702 are in transmission cooperation through a chain 703. A plurality of water transporting members are arranged at equal intervals on the chain 703. The rotating shaft 701 of the sprocket 702 is in transmission cooperation with the generator.

[0061] A plurality of water transporting members enclose a ring on the chain 703. By pulling the sprocket 702 to move vertically downward through a plurality of water transporting members filled with high-salt mine water, the two sprockets 702 are driven to rotate. The rotating sprockets 702 drive the generator to rotate, thereby realizing power generation. It should be noted that each water transporting member is filled with high-salt mine water at the wellhead of the deep mine 6. Under the gravity of a plurality of water transporting members filled with high-salt mine water, the chain 703 is pulled in a single direction. When the water transporting member filled with high-salt mine water passes through the liquid releasing mechanism, the high-salt mine water inside the water transporting member is released and flows back into the deep mine 6. Through the transmission of the chain 703, each water transporting member can return to the water receiving position again through the bottom of the deep mine 6, and the continuous transmission of the chain 703 can be realized, so the power generation efficiency of the water potential energy power generation system is improved.

[0062] Further, the water transport member includes a water tank 704 hinged to the chain 703. An outlet 706 is provided on a side of the water tank 704 away from the chain 703. A blocking assembly is arranged between opposite side walls of the water tank 704 for blocking the outlet 706.

[0063] In this embodiment, a hinge seat 713 is hinged to the chain 703, and the water tank 704 is hinged to the chain 703 through the hinge seat 713.

[0064] The on-off of the outlet 706 can be controlled by the provided blocking assembly. When the water tank 704 is filled with high-salt mine water and moves downward, the tightness of the water tank 704 can be ensured to prevent water leakage. When the water tank 704 approaches the liquid level of the deep mine 6, the blocking assembly is separated from the outlet 706, enabling the water in the water tank 704 to be released.

[0065] Further, the blocking assembly includes a rotating shaft 708 rotatably connected to opposite side walls of the water tank 704. A blocking plate 707 is connected between the two rotating shafts 708. A torsion spring 709 is sleeved on the rotating shaft 708. One end of the torsion spring 709 is fixedly connected to the blocking plate 707, and the other end of the torsion spring 709 is connected to the side wall of the water tank 704.

[0066] The blocking plate 707 is always in close contact with the side wall of the water tank 704 under the action of the torsion spring 709 to block the outlet 706.

[0067] Further, in order to improve the sealing performance, a sealing gasket 705 is provided on a side of the water tank 704 close to the outlet 706.

[0068] Further, the liquid release mechanism includes a bracket assembly provided on the inner wall of the deep mine 6, and the bracket assembly is arranged close to the liquid level of the deep mine 6. A trigger assembly is provided on the bracket assembly, and the blocking plate 707 is flipped through the trigger assembly.

[0069] The provided trigger assembly enables the blocking plate 707 to rotate against the torsion of the torsion spring 709, so that the blocking plate 707 loses the block on the outlet 706, realizing the release of the water in the water tank 704.

[0070] Further, the trigger assembly includes a rack 714 provided on the bracket assembly. One end of the rotating shaft 708 away from the blocking plate 707 penetrates through the side wall of the water tank 704 and is connected with a gear 712, and the gear 712 meshes with the rack 714.

[0071] Through the meshing of the gear 712 and the rack 714, the gear 712 drives the rotating shaft 708 and the blocking plate 707 to rotate.

[0072] Further, the support assembly includes a fixing frame 711 fixedly connected to the inner wall of the deep mine 6. The fixing frame 711 is horizontally arranged, and a support frame 710 is vertically connected to the bottom end of the fixing frame 711. A rack 714 is hinged to one end of the fixing frame 711 close to the chain 703. A spring 715 is connected to the bottom end of the rack 714, and the other end of the spring 715 is connected to the support frame 710, and the spring 715 is arranged parallel to the fixing frame 711.

[0073] The spring 715 is arranged to incline the upper end of the rack 714 towards the deep mine 6 in the natural state, facilitating the engagement of the gear 712 with the rack 714. After engagement, the rebound force provided by the spring 715 ensures the effectiveness of the meshing transmission between the gear 712 and the rack 714.

[0074] Further, a drain pipe 716 is provided at the wellhead of the deep mine 6. The drain pipe 716 is correspondingly arranged with the water transporting member. There is a water-cooled air conditioner 2 in the building interior. The water-cooled air conditioner 2 exchanges heat with the phase change cold storage device 4 and releases cold energy to the building interior; the water outlet end of the water-cooled air conditioner 2 is communicated with the drain pipe 716.

[0075] The water after heat exchange by the water-cooled air conditioner 2 flows into the water tank 704 through the drain pipe 716 and finally returns to the deep mine 6.

[0076] The ice slurry energy storage and phase change cooling system based on deep high salinity mine water provided by the present invention has the following working principle: When in use, during the off-peak power consumption period, the refrigerator 1 is powered at night. The refrigerator 1 cools the high-salt mine water to form ice slurry and stores it in the ice slurry energy storage tank 3. During the day, the ice slurry energy storage tank 3 releases cold energy to the phase change cold storage device 4, enabling long-term cold energy buffering and cooling the energy storage power station 5. At the same time, the circulating water of the water-cooled air conditioner 2 is cooled through heat exchange, and then the building interior is cooled through the heat exchange between the water-cooled air conditioner 2 and the building interior. The high-salt mine water after heat exchange is poured into each water tank 704 through the drain pipe 716. The water tank 704 filled with high-salt mine water pulls the sprocket 702 to move vertically downward, thereby driving the two sprockets 702 to rotate. The rotating sprockets 702 drive the generator to rotate, thereby realizing power generation. The electric energy is stored in the energy storage power station 5 for grid connection or used for the operation of the refrigerator 1. When the water tank 704 filled with high-salt mine water passes by the rack 714, the gear 712 on the water tank 704 meshes with the rack 714. The gear 712 drives the rotating shaft 708 and the plug plate 707 to rotate, thereby causing the plug plate 707 to lose the blockage of the water outlet 706, realizing the release of the water in the water tank 704 and its return flow to the deep mine 6. When the gear 712 is separated from the rack 714, the rotating shaft 708 and the plug plate 707 are reset under the action of the torsion spring 709, and the plug plate 707 re-blocks the water outlet 706. Through the transmission of the chain 703, each water tank 704 can return to the water receiving position again through the bottom of the deep mine 6.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0078] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application.

Claims

1. An ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water, characterized in that: include: A refrigerator (1), the refrigerator (1) being used to cool high-salinity mine water and form ice slurry; An ice slurry energy storage tank (3), the ice slurry energy storage tank (3) being used to store the ice slurry; A phase-change cold storage device (4), the phase-change cold storage device (4) is used to store the cold energy released by the ice slurry energy storage tank (3) and cool the energy storage power station (5) and the indoor temperature of the building; the high-salt mine water after heat exchange flows back into the deep mine (6); A water potential energy power generation device (7), wherein the water potential energy power generation device (7) converts the potential energy of the high-salt mine water into electrical energy and stores the electrical energy in the energy storage power station (5).

2. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 1 is characterized in that: The water potential energy power generation device (7) comprises a liquid driving mechanism, a liquid releasing mechanism and a generator. The liquid driving mechanism rotates by utilizing the potential energy of the high-salt mine water. The liquid driving mechanism cooperates with the generator in transmission. The liquid driving mechanism comprises a transmission chain assembly. The transmission chain assembly is provided with a plurality of water transporting parts. The water transporting parts are used to transport the high-salt mine water. The liquid releasing mechanism is used to release the high-salt mine water in the water transporting parts and allow the high-salt mine water to flow back into the deep mine (6).

3. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 2 is characterized in that: The transmission chain assembly comprises two sprockets (702), one of the sprockets (702) being arranged at the wellhead of the deep mine (6), and the other of the sprockets (702) being arranged at the well bottom of the deep mine (6), the two sprockets (702) being coupled via a chain (703), a plurality of water transporting parts being arranged at equal intervals on the chain (703), and a rotating shaft (701) of the sprocket (702) being coupled via a generator.

4. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 3 is characterized in that: The water transport member comprises a water tank (704) hinged on the chain (703); a water outlet (706) is provided on a side of the water tank (704) away from the chain (703); a blocking component is provided between opposite side walls of the water tank (704); the blocking component is used to block the water outlet (706).

5. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 4 is characterized in that: The blocking assembly comprises a rotating shaft (708) rotatably connected to the opposite side walls of the water tank (704), a blocking plate (707) is connected between the two rotating shafts (708), a torsion spring (709) is sleeved on the rotating shaft (708), one end of the torsion spring (709) is fixedly connected to the blocking plate (707), and the other end of the torsion spring (709) is connected to the side wall of the water tank (704).

6. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 5 is characterized in that: A sealing gasket (705) is provided on one side of the water tank (704) close to the water outlet (706).

7. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 5 is characterized in that: The liquid release mechanism comprises a support assembly arranged on the inner wall of the deep mine (6), and the support assembly is arranged close to the liquid surface of the deep mine (6). A trigger assembly is arranged on the support assembly, and the blocking plate (707) is flipped by the trigger assembly.

8. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 7 is characterized in that: The trigger assembly comprises a rack (714) arranged on the bracket assembly, and one end of the rotating shaft (708) away from the blocking plate (707) penetrates the side wall of the water tank (704) and is connected to a gear (712), and the gear (712) is meshed with the rack (714).

9. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 8 is characterized in that: The support assembly includes a fixed frame (711) fixedly connected to the inner wall of the deep mine (6), the fixed frame (711) is arranged horizontally, the bottom end of the fixed frame (711) is vertically connected to the support frame (710), the rack (714) is hinged to one end of the fixed frame (711) close to the chain (703), the bottom end of the rack (714) is connected to a spring (715), the other end of the spring (715) is connected to the support frame (710), and the spring (715) is arranged parallel to the fixed frame (711).

10. The ice slurry energy storage and phase change cooling system based on deep high-mineralization mine water according to claim 2 is characterized in that: A drainage pipe (716) is provided at the wellhead of the deep mine (6), and the drainage pipe (716) is provided corresponding to the water transport component. A water-cooled air conditioner (2) is provided indoors in the building, and the water-cooled air conditioner (2) exchanges heat with the phase-change cold storage device (4) and carries cold energy to release indoors in the building; the water outlet of the water-cooled air conditioner (2) is connected to the drainage pipe (716).

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