CN1987228A - Central air conditioning system using syphon principle with river water as cool source - Google Patents
Central air conditioning system using syphon principle with river water as cool source Download PDFInfo
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- CN1987228A CN1987228A CNA2006100952857A CN200610095285A CN1987228A CN 1987228 A CN1987228 A CN 1987228A CN A2006100952857 A CNA2006100952857 A CN A2006100952857A CN 200610095285 A CN200610095285 A CN 200610095285A CN 1987228 A CN1987228 A CN 1987228A
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Abstract
A centralized air conditioner system based on siphon principle and using river water as cold source features that the temp difference between river water and ambient temp is used, the temp difference between input water and output water is 2-3 deg.C, the water system of air conditioner is divided in to multiple regions and vacuumized to generate siphon phenomenon in water draining tube unit for increasing system flow, the terminal air conditioner is specially designed, an electromagnetic valve is installed at the outlet of water pump, the parallel tubes in heat exchanger are used to decrease the water flow speed, etc.
Description
Affiliated technical field;
The present invention relates to a kind of air handling system.Adopt the central air conditioner system of river cooling.
Background technology;
Present known air cooling-down regulating system is to realize cooling by energy refrigeration.
Summary of the invention;
In order to overcome the high shortcoming of existing energy energy consumption for cooling, invent a kind of central air conditioner system that adopts siphon principle with the river cooling, this system utilizes the temperature difference of river and surrounding air to carry out the heat exchange cooling.
The present invention solves the employed technical scheme of its technical problem;
The temperature gap of river and surrounding air is less, and air-conditioning system Inlet and outlet water temperature gap is designed to: the 2 ℃ of degree in the low district of air-conditioning, the 2.5-3 ℃ of degree in the high district of air-conditioning.Air-conditioning system is divided into 4 districts, low district, middle district, second highest region, high district.
4 districts adopt water circulating pump independently to supply water respectively, descend draining respectively, and draining concentrates row in the river at the bottom collecting pipe.The employing water system vacuumizes, the draining flow velocity is much larger than the water inlet pipe flow velocity when working, and drainpipe partly is a negative pressure, produces siphonage when current fall, and has increased flow system flow.Highest position, installation at each subregion drainpipe connect vavuum pump, system's drainpipe negative pressure work.
The terminal air-conditioner of the horizontal bright dress axial fan coil pipe of the furred ceiling of the suitable river low-temperature receiver work of specialized designs, the terminal air-conditioner of the horizontal concealed installation centrifugal fan of the furred ceiling coil pipe of the suitable river low-temperature receiver work of specialized designs.
Increase the heat exchange area of terminal air-conditioner, strengthen the logical sectional area of terminal air-conditioner current, reduce water velocity in the copper pipe, reduce of the wearing and tearing of the high current of sealing factor the copper pipe wall.
The horizontal bright dress axial fan coil pipe air-conditioners of furred ceiling that adopt are optimized air quantity energy loss-rate more, improve air mass flow, improve heat exchanger effectiveness.
The specific embodiment;
1: adopt the horizontal bright dress axial fan coil pipe air-conditioner of furred ceiling, divide single blower fan and 2 kinds of two air conditioner with blower and coiled tube, join the 400mm axial fan.It is big to have air mass flow, and energy consumption is low, the heat exchanger effectiveness height, do not take ground area characteristics.
2: adopt the horizontal concealed installation centrifugal fan of furred ceiling coil pipe air-conditioner, it is big to have a heat exchange area, goes out the wind pressure height, does not take the characteristics of ground area.
3: system adopts the immersible pump water intaking, and is customized: 970 rev/mins of rotating speeds.Air-conditioning system is divided low district, middle district, second highest region, and pump efficiency is improved in high district.Middle district, the horizontal floor in high district adopts 4-5 rice low lift, large flow pipe road pump to guarantee horizontal floor flow.Vertical capstan pump is installed in the vertical floor in high district, employing increases high district hydraulic pressure.All tubing pumps, the water inlet standpipe, soil stack is installed in the architecture pipe well.
4: highest position, installation at each subregion drainpipe of air cooling-down regulating system connect vavuum pump, start vavuum pump before the system works, and system is further vacuumized.During system works, the water pump that is in low level supplies water to being in high-order terminal air-conditioner, the draining in-pipe flow is the movement of falling object, flow velocity is much larger than water inlet pipe, in the drainpipe is negative pressure, produces siphonage, has increased flow system flow, improve Energy Efficiency Ratio, reduced pump energy consumption.
5: river has suspension, and native system adopts on the immersible pump filter screen is installed, and 2 grades of y-type filters is installed in the system is solved.The blowdown of y-type filter and filter screen is adopted at the immersible pump and the water circulating pump port of export anti-water solenoid valve is installed, and when water pump is shut down, at first switches off the pump, and utilizes reciprocal current flushing y-type filter and the immersible pump filter screen of swinging to, and closes magnetic valve at last.
6: the solution that the river sealing factor is high;
The terminal air-conditioner in room adopts φ 16 * 1mm heat exchanger tube, and 6 combs are to 10 comb parallel operations, reduction water velocity, and maximum flow of water speed reduces the wearing and tearing of the high current of sealing factor to the copper pipe wall less than 0.8 meter per second in the design heat exchanger tube.
7: the cleaning blowdown of terminal air-conditioner:
Terminal air-conditioner adopts goes up water inlet, water outlet down, helps terminal air-conditioner blowdown.System's design clear water reserviors (the fire-fighting pond of holding concurrently) are installed the clear water flushing pump, are adopted the clear water rinse-system through Cheng Dian.
8: partly cooling of room design river and water source heat pump air-conditioner device dual system solves the high-end user demand.
9: the water source heat pump air-conditioner device is installed the health hot water heater, solves user's health hot water demand.
10: the increase and decrease of air-conditioning system refrigerating capacity, adopt the air quantity that starts water pump quantity and regulate pump capacity and terminal air-conditioner to realize.
The invention has the beneficial effects as follows:
Do not use energy refrigeration, adopt the cooling of river low-temperature receiver.Energy consumption and air-conditioner host investment that energy refrigeration produces have been saved.River temperature height, heat insulating work require low, have saved the heat insulating work investment.The increase and decrease of system's refrigeration work consumption adopts the mode that increases and reduce discharge and fan delivery to regulate, and energy consumption is low.
There are not investment of energy refrigeration host computer and maintenance problem, simple in structure.Be near the rooms of buildings the riverine river, a kind of cheap cooling approach is provided.
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the central air-conditioning schematic diagram that adopts the river cooling; Fig. 2 is the central air-conditioning floor levels system diagram that adopts the river cooling; Fig. 3 is the room air conditioner schematic diagram; Fig. 4 is the room air conditioner heat exchanger figure that adopts the river cooling; Fig. 5 is 4 air conditioning zoning system flow charts; Fig. 6 is the horizontal bright dress axial fan coil pipe air-conditioner figure of river low-temperature receiver furred ceiling; Fig. 7 is the two centrifugal fan coil pipe air-conditioner figure of the horizontal concealed installation of river low-temperature receiver furred ceiling; Fig. 8 is the two-way control circuit figure of fan coil magnetic valve.
Fig. 1: the central air-conditioning schematic diagram that adopts the river cooling;
In in Fig. 1 embodiment, immersible pump (1), immersible pump filter screen (2), anti-water solenoid valve (3), rubber Glue flexible pipe (4), y-type filter (5), water knockout drum (6), flexible rubber joint (7), water circulating pump group Part (8) is swung to current scouring electromagnetic valve (9), air conditioning zoning flow indicator (10), coiler fan electricity Magnet valve (11), chilled water coil blower fan (12), stop valve (13), negative pressure air tank (14), the electromagnetism of finding time Valve (15), vavuum pump (16), pressurizing for high building tubing pump assembly (17), water pump check-valves (18), sky Adjusting system flushing pollution discharge magnetic valve (19), system's flushing pump (20), clear water reserviors (21), clear water reserviors add water Valve (22), other 2 water rationing pipes (23), other 2 subregion drainpipes (24), draining collecting pipe (25), Feed pipe (L1), drainpipe (L2) wherein has the floor air-conditioning system to insert (vertical dotted line), wherein has Coiled air conditioner inserts (horizontal dotted line).
Fig. 1 description of drawings;
Air-conditioning system Inlet and outlet water temperature gap is designed to the 2 ℃ of degree in low district, 2.5-3 ℃ of degree of Zhong Qu and high district, sky Adjusting system designs refrigerating capacity and is determined by design discharge, the adjusting of air-conditioning system refrigerating capacity, employing increase and decrease water pump The operation number of units determines. The river temperature is higher, and the heat exchange area of terminal air-conditioner is designed to; Conventional identical refrigeration The 4-5 that measures terminal air-conditioner heat exchange area doubly sees Fig. 4, Fig. 6, Fig. 7.
Design altogether 4 air conditioning zonings, adopt respectively different lift water pumps to supply water. The feed pipe of each subregion with Drainpipe is installed in the building toilet piping shaft, drainpipe bottom concentrate on collecting pipe discharged to the river in, Drainpipe outlet is not under the middle water level line of river, and outlet is towards the downstream. Each air conditioning zoning soil stack top, 20 liter/mins of clocks of 0.1 cubic metre of negative-pressure cup and discharge capacity, vavuum pump are installed respectively.
Press design drawing and install, system's pressure testing is qualified for and vacuumized in 12 hours. Observe vacuum meter, start diving Pump was shut down after 5 minutes, did to vacuumize in 12 hours again, started water circulating pump and shut down after 5 minutes, did 24 again Hour vacuumize, it is following qualified that pressure reaches 50Pa. The start-up system water circulating pump, make commissioning of central air conditioning systems With trial run. Vacuumize 20-30 minutes, a small amount of air of removal system before the every task of air-conditioning system later on.
Magnetic valve and the vavuum pump interlock of finding time, the setting height(from bottom) of vavuum pump be greater than the vavuum pump elevation that absorbs water, and Stay 2-3 meters surplus suction elevations.
The effect of anti-water solenoid valve and exit of pump magnetic valve;
Switch off the pump earlier during shutdown, swing to current flushings y-type filter and immersible pump when shutting down with water pump Filter screen, then shut electromagnetic valve.
The control of floor coiler fan magnetic valve and system's flushing pollution discharge;
River is sometimes muddy, clear water reserviors of system and system's flushing pump. The system-down afterflush is got rid of During turbidity, open the terminal air-conditioner entering water electromagnetic valve of flushing floor, (its by the central air-conditioning centralized control room Its floor closed electromagnetic valve) start-up system flushing pump, opening system flushing pollution discharge electromagnetic valve for water pump (19) in turn, Wash in turn each subregion floor system with the clear water behind the Cheng Dian in the clear water reserviors, layering, get rid of muddy water. The coiler fan magnetic valve is seen Fig. 8 by central air-conditioning centralized control room and the two-way control of user side.
Fig. 2: the central air-conditioning floor levels system diagram that adopts the river cooling
In embodiment illustrated in fig. 2, floor levels flow system flow meter (1), the floor levels flow system flow is regulated Valve (2), floor levels system leaving water temperature shows meter (3), floor levels system inflow temperature shows meter (4), Floor levels system capstan pump (5) high-storey capstan pump (6).
Fig. 2 description of drawings;
In an embodiment, regulate floor levels flow system flow control valve (2), observation floor levels flow system flow Count (1), reach this laminar flow amount design load. The This floor coiler fan is driven top gear, the coiler fan outlet valve All open greatly, measure coiler fan Inlet and outlet water temperature difference with 0.1 ℃ of scale of specification, infra-red thermometer, see Examine coiler fan Inlet and outlet water temperature value, the coil pipe outlet valve that temperature gap is little turn down, make the Inlet and outlet water flow with Temperature difference meets design load.
Fig. 3; The room air conditioner schematic diagram:
In an embodiment; Singly join in the two configuration rooms (1) of river low-temperature receiver fan coil and water resource heat pump coil pipe Put river low-temperature receiver fan coil room (2), water source heat pump units case (3), health hot water heat exchanger (4), Refrigeration compressor (5), red copper screw pipe condenser (6), red copper screw pipe condenser inlet/outlet pipe (7), spiral shell Coiled condenser Inlet and outlet water reducing external fiber tube joint (8), floor levels flow system flow meter (9), discharge is transferred Joint valve (10), river low-temperature receiver fan coil (11), fan coil magnetic valve (12), solenoid operated four-way valve (13), Water source heat pump units health hot water circulation inlet/outlet pipe (14), fluororesin filter device (15), throttle pipe (16), water Source source pump fan coil (17), health hot water heat exchanger fluorine air inlet pipe (18), the sanitary hot hydro-thermal is handed over Parallel operation fluorine escape pipe (19), water source heat pump units hang structure fixture (20), water source heat pump units fluorine turnover gas Pipe (21), electronic digit displays temperature controller (22), target type meter (23).
Fig. 3 description of drawings;
When the user had high request in design, river low-temperature receiver air-conditioner and the two configurations of water source heat pump units air-conditioner were done in the room.When the user is set to highly when cold, river low-temperature receiver air-conditioner and water source heat pump units air-conditioner are worked simultaneously, and the water source heat pump units air-conditioner quits work when reaching the user temperature is set, and river low-temperature receiver air-conditioner works on.Cold or low when cold in the user is set to, the work of not turning round of water source heat pump units air-conditioner, river low-temperature receiver air-conditioner running work.River low-temperature receiver air-conditioner blower fan runs up when cold in the user is set to, when the user is set to low river low-temperature receiver air-conditioner blower fan middling speed running when cold.
The setting valve of electronic digit displays temperature controller;
It is 28 ℃ of degree that the lower limit of water source heat pump units air-conditioner is shut down setting valve, is higher than the running automatically of 31 ℃ of degree, and temperature is lower than 28 ℃ of degree and does not turn round, and has only the work of river low-temperature receiver air-conditioner.River low-temperature receiver air-conditioner is not made temperature and is set, and only sets blower fan high speed, middling speed running and switch.
In order to make full use of heat energy, water source heat pump units health hot water heat exchanger (4) has been installed in figure three illustrated embodiments, the heat energy of discharging when utilizing compressor cooling heating health hot water, health hot water heat exchanger, pipe sidle fluorine, and shell-side is leaked water.Heat exchanger must vertically be installed, and the cold-producing medium escape pipe connects the lower end, is beneficial to the compressor oil return.The health hot water inlet pipe connects the heat exchanger lower end, the hot storage tank of last termination.When architectural design had concentrated hot water supply system, health hot water turnover pipe connect this circulatory system.
With the emptying of health hot water heat exchanger water, and closed the turnover water valve when winter, water source heat pump units heated.Measuring condition, hot water forced circulation and free convection circulation according to the user hot water demand all can.The hot storage tank of convection circulation installation site should be higher than water source heat pump units.
Fig. 4: the room air conditioner heat exchanger that adopts the river cooling;
In an embodiment, φ 16 * 1 copper tubes, antiseptic and hydrophilic aluminium fin, the hydraulic pressure pipe in pipe that rises.Aluminium spacing of fin 2mm, aluminium fin thickness, 0.25mm (1), 8 combs assembling heat exchanger (2) in parallel, bright dress air-conditioner 6 combs heat exchanger (3) in parallel, concealed installation air-conditioner 6 combs heat exchanger (4) in parallel, concealed installation air-conditioner 10 combs heat exchanger (5) in parallel.
Fig. 4 description of drawings; River sealing factor sometimes is big, adopts the multi coil interior water velocity of heat exchange copper tube that reduces in parallel, reduces the wearing and tearing of copper pipe wall.Maximum flow of water speed 0.8 meter per second in the existing conceptual design copper pipe.
Fig. 5; 4 air conditioning zoning system flow charts;
In an embodiment: immersible pump (1), immersible pump filter screen (2), anti-water solenoid valve (3), rubber hose (4), y-type filter (5), water knockout drum (6), clear water reserviors priming valve (7), clear water reserviors (8), system's flushing pump (9), flexible rubber joint (10), air-conditioning system flushing pollution discharge magnetic valve (11), water circulating pump (12), current scouring electromagnetic valve (13) is swung to by system, y-type filter (14), air conditioning zoning flow indicator (15), chilled water coil blower fan (16), coil pipe blower fan magnetic valve (17), chilled water coil blower fan outlet valve (18), water source heat pump units helix tube water-cooled condenser (19), health hot water water inlet pipe (20), health hot water outlet pipe (21), health hot water heat exchanger (22), refrigeration compressor (23), fluororesin filter device (24), throttle pipe (25), fluorine coil pipe blower fan (26), room temperature controller (27), solenoid operated four-way valve (28), high district horizontal floor capstan pump assembly (29), floor levels flow system flow meter (30), negative pressure air jar (31), the magnetic valve of finding time (32), vavuum pump (33), high district vertical floor capstan pump assembly (34), remove other partition system feed pipe (35) of air-conditioning, other partition system drainpipe (36) of air-conditioning, feed pipe (L1), drainpipe (L2), refrigerant pipe (F).Expression wherein has the floor air-conditioning system to insert (vertical dotted line), and expression wherein has the coil pipe air-conditioner to insert (horizontal dotted line).
Fig. 5 description of drawings;
After air-conditioning system was shut down when river was muddy, start scavenging pump, open in turn in order and clean floor fan coil magnetic valve, with the clear water rinse-system of service sink.Other does not clean floor fan coil closed electromagnetic valve.Fig. 6: the horizontal bright dress twin axial air conditioner with blower and coiled tube of river low-temperature receiver furred ceiling.
In figure six illustrated embodiments; φ 16 * 1 copper tubes, the hydraulic pressure pipe that rises, antiseptic and hydrophilic aluminium fin heat exchanger, the hydraulic pressure pipe that rises, aluminium spacing of fin 2mm, thickness 0.25mm (1), 8 combs heat exchanger in parallel, 120 square metres of heat exchange areas (2), 6 combs heat exchanger in parallel, 60 square metres of heat exchange areas (3), axial fan (4), twin axial blower fan air-conditioner perspective view (5), air-conditioner suspension rod mounting fixing parts (6), cold water turnover pore (7), axial fan air-conditioner perspective view (8), twin axial blower fan air-conditioner dorsal view (9), axial fan air-conditioner dorsal view (10), the bright dress twin axial of furred ceiling air conditioner with blower and coiled tube (11), the bright dress axial fan of furred ceiling coil pipe air-conditioner (12), air filter screen (13).
Fig. 6 description of drawings;
The air-conditioner internal face is pasted the thick mylar waterproof of 0.1mm, antirust, pastes the soft foam sqouynd absorption lowering noise of the thick poly-peace fat of 10mm perforate again.Air-conditioner is joined the 400mm axial fan.It is big to have air mass flow, and energy consumption is low, the characteristics that heat exchanger effectiveness is high.
Fig. 7: the two centrifugal fan coil pipe air-conditioners of the horizontal concealed installation of river low-temperature receiver furred ceiling.
In the embodiment shown in fig. 7; (unit, mm)
Fig. 8: the two-way control circuit figure of fan coil magnetic valve.
In the embodiment shown in fig. 8; Fan coil electromagnetic valve coil (1), user side fan coil solenoid control relay (2), centralized control room end fan coil solenoid control disconnecting relay (3), user side fan coil controller (4) connects centralized control room end fan coil solenoid control switch (5).
Figure eight description of drawings;
During the blowdown of system-down afterflush, open in order and clean floor fan coil magnetic valve, realize that user and the two-way control fan coil of centralized control room magnetic valve open and close.
Claims (8)
1: the central air-conditioning that adopts river water as cold source by siphon principle, utilize the temperature difference of river and surrounding air, air-conditioning system to the cooling of building room, it is characterized in that, adopting river to make low-temperature receiver lowers the temperature to rooms of buildings, air-conditioner water system divides low district, middle district, second highest region, high district, each subregion adopts and independently supplies water and drainage system, and circulating pump is installed respectively, each subregion soil stack concentrates row in the river at the bottom collecting pipe, in middle district horizontal floor capstan pump is installed, vertical floor and horizontal floor capstan pump are installed in the height district, vavuum pump is installed in the drainpipe highest position of each air conditioning zoning, water system is vacuumized the work of drainpipe negative pressure.
2: adopt φ 16 * 1mm copper tube aluminium fin heat exchanger, 6 comb parallel operations are made the horizontal bright dress axial fan coil pipe air-conditioner of furred ceiling of low-temperature receiver with river.
3: adopt φ 16 * 1mm copper tube aluminium fin heat exchanger, 8 comb parallel operations are made the horizontal bright dress twin axial air conditioner with blower and coiled tube of furred ceiling of low-temperature receiver with river.
4: adopt φ 16 * 1mm copper tube aluminium fin heat exchanger, 6 comb parallel operations are made the two centrifugal fan coil pipe air-conditioners of the horizontal concealed installation of furred ceiling of low-temperature receiver with river.
5: adopt φ 16 * 1mm copper tube aluminium fin heat exchanger, 8 comb parallel operations are made the two centrifugal fan coil pipe air-conditioners of the horizontal concealed installation of furred ceiling of low-temperature receiver with river.
6: adopt φ 16 * 1mm copper tube aluminium fin heat exchanger, 10 comb parallel operations are made the two centrifugal fan coil pipe air-conditioners of the horizontal concealed installation of furred ceiling of low-temperature receiver with river.
7: pump outlet is installed magnetic valve, and when water pump was shut down, magnetic valve was in opening, with reciprocal current flushing y-type filter and the immersible pump filter screen of swinging to.
8: adopt river to make configuration water source heat pump air-conditioner device in the air-conditioned room of low-temperature receiver, the health hot water heater is installed in the water source heat pump air-conditioner device, the heat heating health hot water of discharging when utilizing the air-conditioner refrigeration.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100952857A CN1987228A (en) | 2006-12-13 | 2006-12-13 | Central air conditioning system using syphon principle with river water as cool source |
| CNA2007101005549A CN101126527A (en) | 2006-12-13 | 2007-04-10 | Central air conditioning system adopting river water as cold source by siphon principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100952857A CN1987228A (en) | 2006-12-13 | 2006-12-13 | Central air conditioning system using syphon principle with river water as cool source |
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| Publication Number | Publication Date |
|---|---|
| CN1987228A true CN1987228A (en) | 2007-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100952857A Pending CN1987228A (en) | 2006-12-13 | 2006-12-13 | Central air conditioning system using syphon principle with river water as cool source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235991A (en) * | 2007-08-14 | 2008-08-06 | 何长江 | Natural cold source central air-conditioning system adopting siphon principle |
| CN102519095A (en) * | 2011-12-02 | 2012-06-27 | 广州铁路职业技术学院 | Chilled water system for central air-conditioning system of high-rise building and control method thereof |
| CN108291740A (en) * | 2015-12-14 | 2018-07-17 | 大金工业株式会社 | Heat-exchange system with the siphon pipe for condensate to be discharged |
| CN110284586A (en) * | 2019-04-08 | 2019-09-27 | 长沙千秋钢结构工程有限公司 | A kind of new energy constant temperature house |
| RU2767253C1 (en) * | 2021-03-26 | 2022-03-17 | Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" | Air conditioning system using natural source cold |
-
2006
- 2006-12-13 CN CNA2006100952857A patent/CN1987228A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235991A (en) * | 2007-08-14 | 2008-08-06 | 何长江 | Natural cold source central air-conditioning system adopting siphon principle |
| CN101235991B (en) * | 2007-08-14 | 2012-08-29 | 何长江 | Natural cold source central air-conditioning system adopting siphon principle |
| CN102519095A (en) * | 2011-12-02 | 2012-06-27 | 广州铁路职业技术学院 | Chilled water system for central air-conditioning system of high-rise building and control method thereof |
| CN108291740A (en) * | 2015-12-14 | 2018-07-17 | 大金工业株式会社 | Heat-exchange system with the siphon pipe for condensate to be discharged |
| CN108291740B (en) * | 2015-12-14 | 2020-08-07 | 大金工业株式会社 | Heat exchange system with siphon for draining condensate |
| CN110284586A (en) * | 2019-04-08 | 2019-09-27 | 长沙千秋钢结构工程有限公司 | A kind of new energy constant temperature house |
| RU2767253C1 (en) * | 2021-03-26 | 2022-03-17 | Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" | Air conditioning system using natural source cold |
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