CN111295083A - Indirect evaporative cooling air conditioning unit based on solar absorption refrigeration - Google Patents

Abstract

The invention discloses an indirect evaporative cooling air conditioning unit based on solar absorption refrigeration, which includes an organic unit casing. The opposite side walls of the unit casing are respectively provided with a primary air inlet and a primary air supply outlet. The flow direction after entering is provided with air filter a, indirect evaporative cooling section, cooling coil combination unit, humidification section, water baffle b and primary blower; The secondary air outlet is provided with a secondary air inlet on the side wall of the unit shell corresponding to one side of the indirect evaporative cooling section; a solar absorption refrigeration module is also included; a control unit is also arranged below the primary blower. The air-conditioning unit of the present invention can greatly improve the energy efficiency of the air-conditioning unit.

Description

An indirect evaporative cooling air conditioning unit based on solar absorption refrigeration

technical field

The invention belongs to the technical field of air conditioning system equipment, and in particular relates to an indirect evaporative cooling air conditioning unit based on solar energy absorption refrigeration.

Background technique

Today, with the rapid development of the Internet and the advent of the 5G era, data centers that carry big data, cloud computing storage and processing are rising up all over the country and growing exponentially. And the power of a single rack is rapidly increasing. 5G communication and the Internet of Things will drive the power consumption scale of a single rack to develop from a standard single rack power of 4kw to a scale of 20-30kw or even higher. Therefore, the power consumption of the data center increases rapidly, and the power consumption of the data center air conditioning system accounts for about 40% of the total power consumption. In response to the high energy consumption of data centers, the Ministry of Industry and Information Technology, the State Administration for Organs Affairs and the National Energy Administration have issued corresponding high-voltage PUE policies, which put forward high requirements for energy conservation of the air-conditioning system of data centers, and the current indirect evaporative cooling technology The application in the data center has become an "energy-saving tool" to reduce the PUE value. At the same time, in order to accelerate the promotion and application of advanced and applicable technology products for green data centers, and to promote the continuous improvement of the energy-saving and green development level of data centers, it is urgent to improve the efficiency of energy, resource utilization and the utilization of renewable energy, and solar energy is an inexhaustible resource. Therefore, how to better combine indirect evaporative cooling technology with solar renewable energy under the condition of ensuring the normal use of data center server equipment, so as to exert the greatest energy saving potential and maximize the Reducing the energy consumption of the air conditioning system in the data center has become an urgent technical problem to be solved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an indirect evaporative cooling air-conditioning unit based on solar energy absorption refrigeration, which adopts solar energy absorption refrigeration as an auxiliary cold source, and can make full use of solar energy to produce frozen water without the need for an electric compression refrigeration device. The energy efficiency of the air conditioning unit is improved to a great extent.

The technical scheme adopted by the present invention is that an indirect evaporative cooling air conditioning unit based on solar absorption refrigeration comprises an organic unit casing, and a primary air inlet and a primary air supply outlet are respectively provided on the opposite side walls of the unit casing, Air filter a, indirect evaporative cooling section, cooling coil combination unit, humidification section, water baffle b and primary blower are sequentially arranged in the unit shell according to the flow direction of the primary air after entering; the unit corresponding to the top of the indirect evaporative cooling section The casing is provided with a secondary air outlet, and the two side walls of the unit casing corresponding to the two opposite sides of the indirect evaporative cooling section are provided with secondary air inlets; it also includes a solar absorption refrigeration module, a solar absorption type The refrigeration module is connected with the cooling coil combination unit through the chilled water pipe to form a circulation loop, and the chilled water pipe is also provided with a chilled water pump; there is also a control unit under the primary blower, and the control unit is respectively connected with the solar absorption refrigeration module, primary blower, humidification section, The chilled water pump, the cooling coil combination unit and the indirect evaporative cooling section are connected.

The present invention is also characterized in that,

A secondary air exhaust fan is arranged at the secondary air outlet, and the secondary air exhaust fan is connected with the control unit.

The indirect evaporative cooling section includes a water baffle a, a water distributor, an indirect evaporative cooling heat exchange core and a water collecting tank a, which are arranged in sequence from top to bottom. The water distributor is connected to the water collecting tank a through a water pipe a; the secondary air inlet It is located on the side wall of the unit shell corresponding to the indirect evaporative cooling heat exchange core and the water collecting tank a. The water pipe a is provided with a water pump a, and the water pump a is connected to the control unit.

An air filter b is provided at the secondary air outlet.

The cooling coil combination unit includes two cooling coils arranged in a "V" shape and connected in parallel. An electric air valve is arranged between the two cooling coils. The electric air valve is connected to the control unit. The two cooling coils pass through the chilled water pipe. It forms a circulation loop with the solar absorption refrigeration module.

The solar absorption refrigeration module includes an absorption refrigerator and a solar heat source device that are connected by a first water pipe and form a circulation loop. The absorption refrigerator forms a circulation loop through a chilled water pipe and two cooling coils. The devices are respectively connected to the control unit.

The absorption refrigerator includes a generator, a condenser, a throttle valve, an evaporator and an absorber connected in sequence. The condenser and the evaporator are connected through a refrigerant pipe, and the throttle valve is arranged on the refrigerant pipe. A solution heat exchanger is arranged between the absorber and the absorber, and the generator, the solution heat exchanger and the absorber are connected by a solution pipe to form an absorbent circulation loop; the solution pipe in the direction of the liquid flowing from the absorber to the heat exchanger is provided with a solution The pump, the evaporator is connected with the two cooling coils through the chilled water pipe to form a circulation loop, and the chilled water pipe in the direction of the liquid flowing from the evaporator to the two cooling coils is provided with a chilled water pump; the generator is connected to the solar heat source device through the first water pipe. The connection forms a circulation loop, and the solution pump is connected to the control unit.

The solar heat source device includes a solar heat collector and a hot water storage tank. The solar heat collector is connected to the hot water storage tank through a second water pipe to form a circulation loop; the liquid flows from the hot water storage tank to the second water storage tank in the direction of the solar heat collector. The water pipe is also provided with a second water pump; the hot water storage tank is connected with the generator through the first water pipe to form a circulation loop; the first water pipe in the direction of the liquid flowing from the generator to the hot water storage tank is also provided with a first water pump; An auxiliary heating device and a heating interface are arranged in the hot water tank; the first water pump and the second water pump are respectively connected with the control unit.

The humidification section includes a high-pressure spray water distributor vertically arranged in the casing of the unit. The nozzle direction of the high-pressure spray water distributor faces the water baffle b. A water collecting tank b is arranged below the high-pressure spray water distributor. The high-pressure spray water distributor passes through a water pipe. b is connected to the water collecting tank b, the water pipe b is also provided with a water pump b, and the water pump b is connected to the control unit.

The beneficial effects of the present invention are:

(1) An indirect evaporative cooling air-conditioning unit based on solar energy absorption refrigeration of the present invention combines indirect evaporative cooling technology with solar energy absorption refrigeration technology, mainly indirect evaporative cooling, and supplemented by solar energy absorption refrigeration. In seasons and cold winters, the natural cold source can be fully utilized for "free cooling", and in the hot summer, solar energy can be fully utilized as the heat source of the absorption chiller to provide chilled water for the cooling coils, reducing the PUE value and consumption of the data center. electricity, and realize the energy-saving operation of the data center throughout the year.

(2) An indirect evaporative cooling air-conditioning unit based on solar energy absorption refrigeration of the present invention utilizes a solar heat source device to absorb solar energy, provides heat source to the absorption refrigerator, and can also support surrounding offices, operation and maintenance and dormitories of the data center. The auxiliary building provides clean and pollution-free energy for heating, which greatly reduces the energy consumption of the data center and saves energy.

(3) An indirect evaporative cooling air-conditioning unit based on solar absorption refrigeration of the present invention adopts a hot water storage tank device, and the heat collected by the solar heat collector can be stored in the hot water storage tank first to avoid heat overflow and cause waste, and then transfer the heat in the hot water storage tank to the absorption chiller as a heat source, because the solar energy is only possible during the day, so the heat source device does not directly use the heat in the solar collector, but stores the heat The water tank first stores the heat, and also uses the auxiliary heating device as a redundancy to ensure the reliability and safety of the data center operation.

Description of drawings

Fig. 1 is the system structure schematic diagram of a kind of indirect evaporative cooling air conditioning unit based on solar energy absorption refrigeration of the present invention;

2 is a schematic structural diagram of a solar absorption refrigeration module of an indirect evaporative cooling air conditioning unit based on solar absorption refrigeration according to the present invention.

In the figure, 1. Primary air inlet, 2. Air filter a, 3. Indirect evaporative cooling heat exchange core, 4. Water distributor, 5. Water baffle a, 6. Secondary air exhaust fan, 7. Secondary air outlet, 8. Cooling coil, 9. Electric air valve, 10. High pressure spray water distributor, 11. Water baffle b, 12. Primary air supply fan, 13. Primary air supply port, 14. Control unit, 15. water collection tank b, 16. water pipe b, 17. water pump b, 18. water pump a, 19. water pipe a, 20. water collection tank a, 21. air filter b, 22. secondary air inlet, 23 . Chilled water pipe, 24. Chilled water pump, 000. Solar absorption refrigeration module, 100. Absorption refrigerator, 200. Solar heat source device, 101. Evaporator, 102. Throttle valve, 103. Condenser, 104. Generator , 105. Solution heat exchanger, 106. Solution pump, 107. Absorber, 108. Refrigerant pipe, 109. Solution pipe, 201. Solar collector, 202. Hot water storage tank, 203. Heating interface, 204. Auxiliary heating device, 205. First water pipe, 206. First water pump, 207. Second water pipe, 208. Second water pump.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

An indirect evaporative cooling air-conditioning unit based on solar absorption refrigeration of the present invention, as shown in Figures 1-2, includes an organic unit casing. The opposite side walls of the unit casing are respectively provided with a primary air inlet 1 and a primary air supply. Air outlet 13, according to the flow direction of the primary air after entering, the unit casing is provided with an air filter a2, an indirect evaporative cooling section, a cooling coil combination unit, a humidification section, a water baffle b11 and a primary blower 12; the top of the indirect evaporative cooling section The corresponding unit casing is provided with a secondary air outlet 7, and the two side walls of the unit casing corresponding to the two opposite sides of the indirect evaporative cooling section are provided with secondary air inlets 22; Refrigeration module 000, the solar energy absorption refrigeration module is connected to the cooling coil combination unit through a chilled water pipe 23 to form a circulation loop, and a chilled water pump 24 is also provided on the chilled water pipe 23; It is connected with the solar absorption refrigeration module 000, the primary blower 12, the humidification section, the chilled water pump 24, the cooling coil combination unit and the indirect evaporative cooling section.

A secondary air exhaust fan 6 is provided at the secondary air exhaust port 7 , and the secondary air exhaust fan 6 is connected to the control unit 14 .

The indirect evaporative cooling section includes a water baffle a5, a water distributor 4, an indirect evaporative cooling heat exchange core 3 and a water collecting tank a20, which are arranged in sequence from top to bottom, and the water distributor 4 is connected to the water collecting tank a20 through a water pipe a19; The air inlet 22 is located on the side wall of the unit casing corresponding between the indirect evaporative cooling heat exchange core 3 and the water collecting tank a20 .

The indirect evaporative cooling heat exchange core 3 can be a plate-fin type, a horizontal round tube and a vertical round tube. The indoor primary air goes through the dry channel and the outdoor secondary air goes through the wet channel. heat exchange;

The secondary air outlet 7 is provided with an air filter b21 The cooling coil combination unit includes two cooling coils 8 arranged in a "V" shape and connected in parallel, and an electric air valve 9 is arranged between the two cooling coils 8 The electric air valve 9 is used to control the primary air passing through the cooling coil 8. The electric air valve 9 is connected to the control unit 14. The two cooling coils 8 form a circulation loop with the solar absorption refrigeration module 000 through the chilled water pipe 23.

The solar absorption refrigeration module 000 includes an absorption refrigerator 100 and a solar heat source device 200 connected by a first water pipe 205 to form a circulation loop. The absorption refrigerator 100 forms a circulation loop with the two cooling coils 8 through the chilled water pipe 23, The absorption chiller 100 and the solar heat source device 200 are respectively connected to the control unit 14 .

The absorption refrigerator 100 includes a generator 104, a condenser 103, a throttle valve 102, an evaporator 101 and an absorber 107 connected in sequence. The condenser 103 and the evaporator 101 are connected through a refrigerant pipe 108, and the throttle valve 102 is arranged on the refrigerant pipe 108, a solution heat exchanger 105 is arranged between the generator 104 and the absorber 107, the generator 104, the solution heat exchanger 105 and the absorber 107 are connected by the solution pipe 109 to form an absorbent circulation loop, A solution pump 106 is provided on the solution pipe 109 in the direction that the liquid flows from the absorber 107 to the heat exchanger 105. The evaporator 101 is connected to the two cooling coils 8 through the chilled water pipe 23 to form a circulation loop, and the liquid flows from the evaporator 101 to the two cooling coils. A chilled water pump 24 is provided on the chilled water pipe 23 in the direction of each cooling coil 8 ;

The solar heat source device 200 includes a solar heat collector 201 and a hot water storage tank 202. The solar heat collector 201 is connected to the hot water storage tank 202 through a second water pipe 207 to form a circulation loop; the liquid flows from the hot water storage tank 202 to the solar heat collection. A second water pump 208 is also provided on the second water pipe 207 in the direction of the generator 201; the hot water storage tank 202 is connected with the generator 104 through the first water pipe 205 to form a circulation loop; the liquid flows from the generator 104 to the hot water storage tank 202. The first water pipe 205 in the direction is also provided with a first water pump 206; the hot water storage tank 202 is provided with an auxiliary heating device 204 and a heating interface 203; the first water pump 206 and the second water pump 208 are respectively connected to the control unit 14.

The auxiliary heating device 204 is an electric heater or other heating device using industrial waste heat and waste heat; the hot water storage tank 202 uses the solar energy received by the solar collector 201 to provide domestic hot water to the supporting facilities around the data center through the heating interface 203 , clean and pollution-free, low energy consumption.

The humidification section includes a high-pressure spray water distributor 10 vertically arranged in the unit casing, the nozzle direction of the high-pressure spray water distributor 10 faces the water blocking plate b11, and a water collecting tank b15 is arranged below the high-pressure spray water distributor 10, and the high-pressure spray water distributor The device 10 is connected to the water collecting tank b15 through a water pipe b16 , and a water pump b17 is also provided on the water pipe b16 , and the water pump b17 is connected to the control unit 14 .

The present invention is an indirect evaporative cooling air conditioning unit based on solar energy absorption refrigeration, and the working process is as follows:

The working process of the indirect evaporative cooling module:

According to the working process of the primary air in the data processing room: the indoor return air is purified and filtered from the primary air inlet 1 through the air filter a2, and then flows through the dry channel of the indirect evaporative cooling heat exchange core 3, and the indoor return air transfers heat to the The secondary air on the side of the wet passage, the primary air of the indoor return air is cooled and cooled, and then passed through the cooling coil 8 for secondary cooling and cooling, and finally humidified in the humidification section, and then the power provided by the primary air blower 12 is used to finally cool and humidify The primary air is sent into the data processing computer room from the primary air supply port 13, and the primary air forms a circulation in this way, so as to achieve the cooling effect on the data processing computer room.

According to the working process of the water distribution system: by the power provided by the water pump a18, the water in the water collecting tank a20 is transported to the water distributor 4 through the water pipe a19 for water distribution; It is sent to the high-pressure spray water distributor 10 to humidify the primary air of the return air in the data processing room, and the humidification section is turned on according to the humidity requirements.

The working process of solar absorption refrigeration module 000:

The solar heat collector 201 in the solar heat source device 200 transfers the absorbed solar energy to the hot water storage tank 202 through the second water pump 208, and then the hot water storage tank 202 transfers the heat to the generator 104. When the solar energy is sufficient, The hot water storage tank 202 can continuously store the remaining heat after transfer to save energy; when the solar radiation is seriously insufficient at night, the auxiliary heating device 204 can be activated to ensure that there is enough heat in the hot water storage tank 202 to pass through the first water pump 206 is passed to the generator 104, increasing system stability.

The heat in the hot water storage tank 202 is transferred to the generator 104 through the first water pump 206, because the original concentrated solution has a higher boiling point, so that the refrigerant evaporates first and flows into the condenser 103; the concentrated solution returns through the circulation loop The absorber 107 absorbs the evaporated refrigerant, and the solution heat exchanger 105 exchanges heat with the high temperature concentrated solution flowing from the generator 104 back to the absorber 107 in the circulation loop with the low temperature dilute solution flowing from the absorber 107 to the generator 104 , effectively utilize energy and improve work efficiency; in the condenser 103, the refrigerant condenses and releases heat, and flows into the throttle valve 102; the throttle valve 102 creates a low-pressure environment, and the boiling point of the refrigerant decreases under low pressure, which means that the refrigerant It can be evaporated at a low temperature, and then the low-pressure refrigerant flows into the evaporator 101, and the refrigerant evaporates in the evaporator 101, thereby producing low-temperature chilled water and supplying it to the cooling coil 8 to cool the return air of the data processing room once Air.

Claims (9)

1. An indirect evaporative cooling air conditioning unit based on solar absorption refrigeration is characterized by comprising a unit shell, wherein a primary air inlet (1) and a primary air supply outlet (13) are respectively arranged on two opposite side walls of the unit shell, and an air filter a (2), an indirect evaporative cooling section, a cooling coil combination unit, a humidifying section, a water baffle b (11) and a primary air feeder (12) are sequentially arranged in the unit shell according to the flowing direction of primary air after entering; a secondary air outlet (7) is arranged on the unit shell corresponding to the top of the indirect evaporative cooling section, and secondary air inlets (22) are arranged on two side walls of the unit shell corresponding to two opposite side surfaces of the indirect evaporative cooling section; the solar energy absorption type refrigeration system is characterized by further comprising a solar energy absorption type refrigeration module (000), wherein the solar energy absorption type refrigeration module is connected with the cooling coil pipe combination unit through a freezing water pipe (23) to form a circulation loop, and a freezing water pump (24) is further arranged on the freezing water pipe (23); the solar refrigeration system is characterized in that a control unit (14) is further arranged below the primary air feeder (12), and the control unit (14) is respectively connected with the solar absorption refrigeration module (000), the primary air feeder (12), the humidification section, the chilled water pump (24), the cooling coil combined unit and the indirect evaporative cooling section.

2. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as recited in claim 1, wherein a secondary air exhaust fan (6) is arranged at the secondary air exhaust outlet (7), and the secondary air exhaust fan (6) is connected with the control unit (14).

3. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 1, wherein the indirect evaporative cooling section comprises a water baffle a (5), a water distributor (4), an indirect evaporative cooling heat exchange core (3) and a water collection tank a (20) which are sequentially arranged from top to bottom, and the water distributor (4) is connected with the water collection tank a (20) through a water pipe a (19); the secondary air inlet (22) is positioned on the corresponding side wall of the unit shell between the indirect evaporative cooling heat exchange core body (3) and the water collecting tank a (20), the water pipe a (19) is provided with a water pump a (18), and the water pump a (18) is connected with the control unit (14).

4. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 1, wherein an air filter b (21) is arranged at the secondary air exhaust outlet (7).

5. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 1, wherein the cooling coil assembly unit comprises two cooling coils (8) arranged in a V shape and connected in parallel, an electric air valve (9) is arranged between the two cooling coils (8), the electric air valve (9) is connected with the control unit (14), and the two cooling coils (8) form a circulation loop with the solar absorption refrigeration module (000) through a chilled water pipe (23).

6. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as recited in claim 5, wherein the solar absorption refrigeration module (000) comprises an absorption refrigerator (100) and a solar heat source device (200) which are connected through a first water pipe (205) and form a circulation loop, the absorption refrigerator (100) forms a circulation loop with the two cooling coils (8) through a chilled water pipe (23), and the absorption refrigerator (100) and the solar heat source device (200) are respectively connected with the control unit (14).

7. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 6, wherein the absorption refrigeration machine (100) comprises a generator (104), a condenser (103), a throttle valve (102), an evaporator (101) and an absorber (107) which are sequentially connected, the condenser (103) is connected with the evaporator (101) through a refrigerant pipe (108), the throttle valve (102) is arranged on the refrigerant pipe (108), a solution heat exchanger (105) is arranged between the generator (104) and the absorber (107), and the generator (104), the solution heat exchanger (105) and the absorber (107) are connected through a solution pipe (109) to form an absorbent circulation loop; a solution pump (106) is arranged on a solution pipe (109) in the direction that the liquid flows from the absorber (107) to the heat exchanger (105), the evaporator (101) is connected with the two cooling coils (8) through a freezing water pipe (23) to form a circulation loop, and a freezing water pump (24) is arranged on the freezing water pipe (23) in the direction that the liquid flows from the evaporator (101) to the two cooling coils (8); the generator (104) is connected with the solar heat source device (200) through a first water pipe (205) to form a circulation loop, and the solution pump (106) is connected with the control unit (14).

8. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 7, wherein the solar heat source device (200) comprises a solar heat collector (201) and a heat storage water tank (202), and the solar heat collector (201) is connected with the heat storage water tank (202) through a second water pipe (207) to form a circulation loop; a second water pump (208) is also arranged on a second water pipe (207) in the direction that the liquid flows from the heat storage water tank (202) to the solar heat collector (201); the heat storage water tank (202) is connected with the generator (104) through a first water pipe (205) to form a circulation loop; a first water pump (206) is also arranged on a first water pipe (205) in the direction of the liquid flowing from the generator (104) to the heat storage water tank (202); an auxiliary heating device (204) and a heating interface (203) are arranged in the heat storage water tank (202); the first water pump (206) and the second water pump (208) are respectively connected with the control unit (14).

9. The indirect evaporative cooling air conditioning unit based on solar absorption refrigeration as claimed in claim 1, wherein the humidification section comprises a high-pressure spray water distributor (10) vertically arranged in the unit housing, the nozzle direction of the high-pressure spray water distributor (10) faces to a water baffle b (11), a water collection tank b (15) is arranged below the high-pressure spray water distributor (10), the high-pressure spray water distributor (10) is connected with the water collection tank b (15) through a water pipe b (16), a water pump b (17) is further arranged on the water pipe b (16), and the water pump b (17) is connected with the control unit (14).

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