CN102748963A - Closed water cooling system with double-evaporative cooling pressure - Google Patents
Closed water cooling system with double-evaporative cooling pressure Download PDFInfo
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- CN102748963A CN102748963A CN2012102369473A CN201210236947A CN102748963A CN 102748963 A CN102748963 A CN 102748963A CN 2012102369473 A CN2012102369473 A CN 2012102369473A CN 201210236947 A CN201210236947 A CN 201210236947A CN 102748963 A CN102748963 A CN 102748963A
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Abstract
The invention discloses a closed water cooling system with a double-evaporative cooling pressure, which provides the closed water cooling system used in an air-cooled thermal power set. The closed water cooling system comprises a direct-current evaporating and cooling closed water chiller A, a direct-current evaporating and cooling closed water chiller B, a vacuum butterfly valve, a vapor injector A, a vapor injector B, five sections of steam extracting and entering regulating valve, a plant steam aiding and entering regulating valve, a NO. 8 low pressure heater, a condenser, a liquid level sensor and a DCS (distributed control system); pipe sides of the two direct-current evaporating and cooling closed water chillers A and B are connected in series; and an evaporating and cooling pressure at a casing side of B is lower than that of A, thus the problem that output power of a turbo generator set is limited by an overhigh temperature of closed water is solved, cooling conditions of a host machine and an auxiliary machine are improved, heat output by hot closed water is recycled as much as possible, and power consumption of the closed water system is lowered. By the adoption of the closed water cooling system, no wet-type mechanical ventilated cooling tower is needed for open circulated water cooling, the occupation area of the cooling tower is reduced, the investment on capital construction is reduced, the electricity consumption is decreased, and the water consumption is zero.
Description
(1) technical field:
The enclosed water cooling system of the two evaporative cooling pressure of the present invention relates to the enclosed water cooling system that a kind of air cooling fired power generating unit is used.
(2) background technology:
The enclosed water that the fired power generating unit of prior art is used is the demineralized water of closed cycle; Comprise as its user of enclosed water of cooling medium the hydrogen-cooled device of steam turbine generator, steam turbine generator inner cold water cooler, the various water pumps of steam turbine side sealing water cooler, the multiple pump motor of steam turbine side water-air cooling but device, bearing cooler, little machine main oil pump bearing cooler, vavuum pump working seal water cooler, steam turbine ram's horn cooler, high pressure main inlet throttle-stop valve cooler, reheat stop interceptor valve cooler, pressure fan motor water-air cooling but device, control oil station cooler, primary air fan motor water-air cooling but device, lubricated and control oil station cooler, id-motor water-air cooling but device, lubricated and control oil station cooler, air preheater bearing oil cooler, hydrogen generator station cooler, chemical sampling frame cooler, coal pulverizer bearing oil cooler, start boiler water circulating pump with cooler etc., enclosed water is the essential condition that guarantees the safe operation of fired power generating unit main and auxiliaries.The heat that hot enclosed water carries is taken away by open circulation water in the enclosed water cooler.
The normally used enclosed water cooler of prior art fired power generating unit is a plate type heat exchanger, also has the minority power station to use shell-and-tube heat exchanger.Plate type heat exchanger and shell-and-tube heat exchanger are the water water heat exchanger, and promptly outside working medium is the forced convection heat release to the heat transfer type of wall in heat exchange plate both sides, heat exchanger tube.
Plate type heat exchanger is a kind of high-performance heat exchanger of compact conformation; With countercurrent heat exchange method work, its cold junction end difference is 5K usually, reduces the enclosed coolant-temperature gage like expectation with the method that further reduces cold junction end difference; Improve the cooling effect of enclosed water; Its cost is the plate number that increases investment, increases plate type heat exchanger, and cold junction end difference is reduced to 3.5K from 5K, and investment increases by 40% approximately.
Process with world industryization; The freshwater resources growing tension; Particularly be fit to low calcium, the magnesium ion that the enclosed water cooler directly uses; The freshwater resources of low chlorine root, low solid content, low oxygen demand are more rare; The case that fired power generating unit uses seawater, municipal middle water to use as open circulation water or open circulation water supplementing water is increasing, and the material of the plate of plate type heat exchanger and the heat-transfer pipe of shell-and-tube heat exchanger is used better and better, but the average fault-free hourage of enclosed water cooler does not rise counter falling.
In order to build the large electric power plant unit in the drought and water shortage area; Prior art has been developed air cooling fired power generating unit (comprising Direct Air-Cooled and indirect air cooling); The air cooling fired power generating unit is that safe production in summer is designed with the small-sized wet type circulating water cooling system of a cover usually; Aiming at the enclosed water cooler provides temperature lower open circulation water, and the water consumption that this kind design not only increased considerably capital expenditure, increased considerably the air cooling fired power generating unit also may not necessarily solve the too high problem of air cooling fired power generating unit enclosed in summer coolant-temperature gage.
(3) summary of the invention:
Technical problem to be solved:
Under hot and humid meteorological condition; When the open circulation coolant-temperature gage surpasses 33 ℃; The enclosed coolant-temperature gage will be above 38 ℃, because the enclosed coolant-temperature gage is the essential condition that guarantees the safe operation of fired power generating unit main and auxiliaries, the enclosed coolant-temperature gage surpasses 38 ℃ possibly cause that the Turbo-generator Set limit exerts oneself.The fired power generating unit of south China had within 1 year count the open circulation coolant-temperature gages more for a long time above 33 ℃; Fired power generating unit open circulation coolant-temperature gage to Southeast Asia can become normality above 33 ℃; To the fired power generating unit of the water-deficient area of adopting Direct Air-Cooled or indirect air cooling, also have within 1 year and count the enclosed coolant-temperature gages more for a long time and surpass 38 ℃, the Turbo-generator Set of prior art can only be dealt with forced partial outage.
When the open circulation coolant-temperature gage surpasses 33 ℃, reduce the enclosed coolant-temperature gage with the method that reduces cold junction end difference, not only costly but also effect is limited, cold junction end difference can not drop to 0.
The enclosed water cooler of prior art is the heat transfer temperature and pressure of design to guarantee to be necessary between enclosed water side and the open type water side of enclosed water side still to be open type water side take usually low temperature rise, high flow capacity no matter; For improving the heat transfer coefficient of plate type heat exchanger, adopt the design of high reynolds number, high turbulence level usually, its cost is High Pressure Difference, high energy consumption; The equivalent diameter of plate type heat exchanger runner has only about 7mm, stops up for preventing runner, must dispose from removing contamination filter screen in open circulation water side, has increased the energy consumption of open circulation water booster again; Jumbo board-like enclosed water cooler needs import, costs an arm and a leg.
Air cooling fired power generating unit in the construction of high temperature and drought water-deficient area is that safe production in summer is designed with the small-sized wet type circulating water cooling system of a cover usually; Aiming at the enclosed water cooler provides temperature lower open circulation water, and the water consumption that this kind design not only increased considerably capital expenditure, increased considerably the air cooling fired power generating unit also may not necessarily solve the too high problem of air cooling fired power generating unit enclosed in summer coolant-temperature gage.
Solve the technical scheme that its technical problem adopts:
The enclosed water cooling system that the purpose of this invention is to provide a kind of pair of evaporative cooling pressure is taked to solve under the meteorological condition of hot and humid or high temperature and drought with the diverse technology path of prior art; When the open circulation coolant-temperature gage surpasses 33 ℃, the problem that the enclosed coolant-temperature gage will be above 38 ℃.The present invention abandons with open circulation water and goes to cool off the routine of closing water recirculated water; Make full use of systems such as the existing vacuum system of Steam Turbine, condensate system, auxiliary steam bleeding system, heat regenerative system, two single flow evaporative cooling enclosed water cooler A connect with the pipe side of B; The evaporative cooling pressure B of shell-side is lower than A, has both solved the problem that the too high restriction Turbo-generator Set of enclosed coolant-temperature gage is exerted oneself and improved main and auxiliary machine cooling condition, recycles hot enclosed water liberated heat again as far as possible, reduces the power consumption of closed Water System.
Existing is 2000t/h with an enclosed discharge, and the enclosed water cooler that 7K (reducing to 38 ℃ for 45 ℃) falls in the enclosed water temperature is the example explanation: enclosed water enthalpy drop 29.25kJ/kg, 2000t/h heat release 58.5 * 10 altogether
6KJ/h, rising like the open circulation water temperature also is 7K (33 ℃ rise to 40 ℃), open circulation discharge needs 2000t/h.
Water is that 2484.38kJ/kg is to 2423kJ/kg at vacuum state 0.001MPa (a) to the interval latent heat of vaporization of 0.005MPa (a); As long as the water of the about 23.8t/h of evaporation under this vacuum state interval; Its caloric receptivity and temperature rise 7K, the open circulation water of flow 2000t/h are together.Water is 6.97 ℃ to 32.88 ℃ at vacuum state 0.001MPa (a) to the interval saturation temperature (also claiming boiling temperature) of 0.005MPa (a).
In the enclosed water cooling system of the two evaporative cooling pressure of the present invention, the shell-side evaporative cooling pressure of single flow evaporative cooling enclosed water cooler A (1) is 0.005MPa (a), and the hot enclosed water that flows through in the pipe side is reduced to 41 ℃ by 45 ℃; The shell-side evaporative cooling pressure of single flow evaporative cooling enclosed water cooler B (2) is 0.003MPa (a), and the hot enclosed water that flows through in the pipe side is reduced to 38 ℃ by 41 ℃; The boiling coefficient of water is much larger than the forced convection exothermic coefficient of water; The hot enclosed water liberated heat of 2000t/h can produce the water vapour of 23.8t/h under vacuum condition, these water vapours will condense, reclaim in No. 8 low-pressure heaters (8) and condenser (9) respectively.
The enclosed water cooling system of the two evaporative cooling pressure of the present invention comprises single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2), vacuum butterfly valve (3), steam jet ejector A (4), steam jet ejector B (5), 5 sections the admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service, No. 8 low-pressure heaters (8), condenser (9), liquid level sensor and DCS control systems; The vacuum state of the 0.005MPa (a) that single flow evaporative cooling enclosed water cooler A (1) shell-side needs is realized with steam jet ejector A (4); The nozzle of steam jet ejector A (4) is by 5 sections admission control valve (6) steam supplies that draw gas; The vacuum state of the 0.003MPa (a) that single flow evaporative cooling enclosed water cooler B (2) shell-side needs is realized with steam jet ejector B (5); The nozzle of steam jet ejector B (5) is by auxilliary vapour admission control valve (7) steam supply of station-service; The diffuser exit of steam jet ejector A (4) connects the vapour side of No. 8 low-pressure heaters (8) of steamer pusher side, reclaims heat, the hot well of hydrophobic backflow condenser (9) by the main frame condensate; The diffuser exit of steam jet ejector B (5) connects condenser (9) vapour side, and condensate imports the hot well of condenser (9); The pipe side water inlet of single flow evaporative cooling enclosed water cooler A (1) is accepted hot enclosed water; The pipe side delivery port of single flow evaporative cooling enclosed water cooler A (1) connects the pipe side water inlet of single flow evaporative cooling enclosed water cooler B (2), and the pipe side delivery port of single flow evaporative cooling enclosed water cooler B (2) is exported cold enclosed water; The aperture of the keying of vacuum butterfly valve (3) and 5 sections admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service is with being controlled by DCS control system, with least energy consumption control enclosed water outlet temperature in desired value.
Single flow evaporative cooling enclosed water cooler A (1) and single flow evaporative cooling enclosed water cooler B (2) are mainly by shell; Steam fairlead A; Membranization water water inlet pipe; Membranization moisture is joined header; Membranization water water distributor; Membranization water is all pressed header; Enclosed water inlet short tube; Tube sheet; Cooling tube bundle; Enclosed water out short tube; The tube sheet stiffener; Support plate in the middle of the cooling tube bundle; Ultrafiltration industry water filling pipe; The membranization water pump; The membranization pump water inlet; Salt balance drain valve; The low-resistance dehydrater; Steam fairlead B and liquid level sensor constitute; Enclosed water flows in the pipe of cooling tube bundle, and the pipe outer surface of cooling tube bundle is accepted the water droplet under the even pouring of membranization water dispenser, at the pipe outer surface formation moisture film of cooling tube bundle; Moisture film evaporates heat absorption under high vacuum condition, the heat release of enclosed water, and water vapour condenses, reclaims in No. 8 low-pressure heaters (8) or condenser (9), accomplishes the function of the enclosed water cooling system of two evaporative cooling pressure.
The membranization water pump gets into single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) membranization water dispenser separately from the bottom water retention zone suction of single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) vacuum involucrum separately after the supercharging; Exert oneself into evaporated quantity of water 2 to 5 times of the flow of membranization water pump; The membranization of water is handled gimmick and is effectively reduced the evaporation of water temperature, has significantly improved the cooling performance of the enclosed water cooling system of two evaporative cooling pressure.
The enclosed water cooling system of the two evaporative cooling pressure of the present invention also is appreciated that to being the jetting type heat pump with steam jet ejector A (4); Is hot enclosed water liberated heat nationality low-pressure steam that carrier carries back No. 8 low-pressure heaters (8) to recycle; Become the part of Steam Turbine heat regenerative system, effectively reduce the hear rate of Turbo-generator Set; Steam jet ejector A (4) adopts steam turbine to draw gas for 5 sections can reduce the Turbo-generator Set hear rate; Steam jet ejector B (5) adopts 0.8MPa to solve Turbo-generator Set 5 sections not enough problems of extraction pressure under startup operating mode and running on the lower load to the auxilliary vapour of the station-service of 1.3MPa; Also improved the controllability of enclosed water out water temperature, making the enclosed water temperature be lower than the open type water temperature becomes the possibility option; The diffuser exit of steam jet ejector B (5) connect condenser (9) make the present invention can be under high back pressure Direct Air-cooled Unit summer condition operate as normal.
The present invention can be used for designing new power station, adopts the enclosed water cooling system of two evaporative cooling pressure, also can be used for the transformation of prior art at the enclosed water cooling system in labour power station.
The beneficial effect of the invention:
● perfection has solved under hot and humid, the high temperature and drought meteorological condition but problem of enclosed water-cooled, avoids occurring the phenomenon of exerting oneself because of the high restriction of enclosed coolant-temperature gage Turbo-generator Set;
● be specially adapted to Direct Air-Cooled or indirect air cooling Turbo-generator Set, avoid occurring limiting the phenomenon that Turbo-generator Set is exerted oneself, reduce closed Water System capital expenditure and zero water consumption significantly because of the enclosed coolant-temperature gage is high;
● improve the cooling condition of fired power generating unit main and auxiliaries, guarantee the generating set safe operation:
● the heat-pump-type operation principle, the enclosed coolant-temperature gage can be lower than the open circulation coolant-temperature gage;
● the upgraded product of large-scale plate type heat exchanger, import substitution significantly reduces the investment of enclosed hydrothermal exchange system;
● no open circulation water booster power consumption, significantly reduce enclosed water-circulating pump power consumption;
● the needed wet type induced cooling tower of no open circulation water-cooled, reduced the cooling tower occupation of land, reduce capital expenditure, reduce station service and zero water consumption;
● Air-cooled Unit still can reclaim most of heat that hot enclosed water is emitted under summer high back pressure operating mode, reduce the Turbo-generator Set hear rate.
(4) description of drawings:
Fig. 1 is the enclosed water cooling system structure chart of two evaporative cooling pressure.
In Fig. 1:
1 single flow evaporative cooling enclosed water cooler A, 2 single flow evaporative cooling enclosed water cooler B,
3 vacuum butterfly valves, 4 steam jet ejector A,
5 steam jet ejector B, 65 sections admission control valves that draw gas,
7 station-services assist vapour admission control valve, 8 No. 8 low-pressure heaters,
9 condensers.
(5) specific embodiment:
Existing is 2000t/h with an enclosed discharge, and 7K falls in the enclosed water temperature, reduces to 38 ℃ from 45 ℃, the enclosed water cooling system of two evaporative cooling pressure be that the example explanation realizes the optimal way invented:
The enclosed water cooling system of the two evaporative cooling pressure of the present invention comprises single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2), vacuum butterfly valve (3), steam jet ejector A (4), steam jet ejector B (5), 5 sections the admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service, No. 8 low-pressure heaters (8), condenser (9), liquid level sensor and DCS control systems; The vacuum state of the 0.005MPa (a) that single flow evaporative cooling enclosed water cooler A (1) shell-side needs is realized with steam jet ejector A (4); The nozzle of steam jet ejector A (4) is by 5 sections admission control valve (6) steam supplies that draw gas; The vacuum state of the 0.003MPa (a) that single flow evaporative cooling enclosed water cooler B (2) shell-side needs is realized with steam jet ejector B (5); The nozzle of steam jet ejector B (5) is by auxilliary vapour admission control valve (7) steam supply of station-service; The diffuser exit of steam jet ejector A (4) connects the vapour side of No. 8 low-pressure heaters (8) of steamer pusher side, reclaims heat, the hot well of hydrophobic backflow condenser (9) by the main frame condensate; The diffuser exit of steam jet ejector B (5) connects condenser (9) vapour side, and condensate imports the hot well of condenser (9); The pipe side water inlet of single flow evaporative cooling enclosed water cooler A (1) is accepted hot enclosed water; The pipe side delivery port of single flow evaporative cooling enclosed water cooler A (1) connects the water inlet of single flow evaporative cooling enclosed water cooler B (2), and the delivery port of single flow evaporative cooling enclosed water cooler B (2) is exported cold enclosed water; The aperture of the keying of vacuum butterfly valve (3) and 5 sections admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service is with being controlled by DCS control system, with least energy consumption control enclosed water outlet temperature in desired value.
The vacuum involucrum of single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) is made up of the compound carbon steel sheet welding of 8mm stainless steel, also can use the inboard thermal spraying 0.3mm of 8mm carbon steel sheet stainless steel layer to substitute; The vacuum involucrum outside is welded with reinforcement, and the heat insulation layer all standing is arranged.
Cooling tube bundle is made up of nominal diameter Φ 19 * 1 seamless ferrite stainless steel pipes, is provided with the spiral trouble flow strip of the system of being turned round by 1 * 16mm ferritic stainless steel band steel in the cooling tube; Tube sheet is by the compound carbon steel sheet manufacturing of 20mm stainless steel, stainless steel layer >=2mm; The tube sheet stiffener can use the inboard thermal spraying 0.3mm of 30mm carbon steel sheet stainless steel layer to substitute, and tube sheet answers full weld to be connected with the tube sheet stiffener.
Cooling tube is connected with the back weldering mode that expands earlier with tube sheet; The cooling tube bundle nominal area of single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) respectively is 600m
2
The membranization water pump 100m that exerts oneself
3/ h, lift 29m.
Membranization water pump and single flow evaporative cooling enclosed water cooler A (1), built-in membranization water dispenser, the low-resistance dehydrater of single flow evaporative cooling enclosed water cooler B (2) are stainless steel.
Vacuum butterfly valve (3) is the two eccentric vacuum butterfly valves of soft seal, and valve rod is furnished with water seal arrangement.
Steam jet ejector A (4), steam jet ejector B (5) are the martensitic stain less steel material.
Single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) are arranged in steam turbine building 6m layer to the indirect air cooling unit; Direct Air-cooled Unit single flow evaporative cooling enclosed water cooler A (1) is arranged in steam turbine building 6m layer, and single flow evaporative cooling enclosed water cooler B (2) is arranged in bottom, air cooling island.
Claims (7)
1. the enclosed water cooling system of two evaporative cooling pressure is characterized in that: comprise single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2), vacuum butterfly valve (3), steam jet ejector A (4), steam jet ejector B (5), 5 sections the admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service, No. 8 low-pressure heaters (8), condenser (9), liquid level sensor and DCS control systems; The vacuum state of the 0.005MPa (a) that single flow evaporative cooling enclosed water cooler A (1) shell-side needs is realized with steam jet ejector A (4); The nozzle of steam jet ejector A (4) is by 5 sections admission control valve (6) steam supplies that draw gas; The vacuum state of the 0.003MPa (a) that single flow evaporative cooling enclosed water cooler B (2) shell-side needs is realized with steam jet ejector B (5); The nozzle of steam jet ejector B (5) is by auxilliary vapour admission control valve (7) steam supply of station-service; The diffuser exit of steam jet ejector A (4) connects the vapour side of No. 8 low-pressure heaters (8) of steamer pusher side, reclaims heat, the hot well of hydrophobic backflow condenser (9) by the main frame condensate; The diffuser exit of steam jet ejector B (5) connects condenser (9) vapour side, and condensate imports the hot well of condenser (9); The pipe side water inlet of single flow evaporative cooling enclosed water cooler A (1) is accepted hot enclosed water; The pipe side delivery port of single flow evaporative cooling enclosed water cooler A (1) connects the pipe side water inlet of single flow evaporative cooling enclosed water cooler B (2), and the pipe side delivery port of single flow evaporative cooling enclosed water cooler B (2) is exported cold enclosed water; The aperture of the keying of vacuum butterfly valve (3) and 5 sections admission control valves (6) that draw gas, the auxilliary vapour admission control valve (7) of station-service is with being controlled by DCS control system, with least energy consumption control enclosed water outlet temperature in desired value.
2. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure is characterized in that described single flow evaporative cooling enclosed water cooler A (1) and single flow evaporative cooling enclosed water cooler B (2) mainly join header, membranization water water distributor, membranization water by shell, steam fairlead A, membranization water water inlet pipe, membranization moisture and all press support plate in the middle of header, enclosed water inlet short tube, tube sheet, cooling tube bundle, enclosed water out short tube, tube sheet stiffener, the cooling tube bundle, ultrafiltration industry water filling pipe, membranization water pump, membranization pump water inlet, salt balance drain valve, low-resistance dehydrater, steam fairlead B and liquid level sensor to constitute.
3. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure; It is characterized in that described steam jet ejector A (4) is the jetting type heat pump; Is hot enclosed water liberated heat nationality low-pressure steam that carrier carries back No. 8 low-pressure heaters (8) to recycle; Become the part of Steam Turbine heat regenerative system, effectively reduce the hear rate of Turbo-generator Set.
4. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure, the diffuser exit that it is characterized in that described steam jet ejector B (5) connect condenser (9) make the present invention can be under high back pressure Direct Air-cooled Unit summer condition operate as normal.
5. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure is characterized in that described vacuum butterfly valve (3) is the two eccentric vacuum butterfly valves of soft seal, and valve rod is furnished with water seal arrangement.
6. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure; It is characterized in that described single flow evaporative cooling enclosed water cooler A (1), single flow evaporative cooling enclosed water cooler B (2) to the indirect air cooling unit, are arranged in steam turbine building 6m layer; Direct Air-cooled Unit single flow evaporative cooling enclosed water cooler A (1) is arranged in steam turbine building 6m layer, and single flow evaporative cooling enclosed water cooler B (2) is arranged in bottom, air cooling island.
7. the enclosed water cooling system of according to claim 1 pair of evaporative cooling pressure is characterized in that described steam jet ejector A (4), steam jet ejector B (5) are the martensitic stain less steel material.
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| CN201210236947.3A CN102748963B (en) | 2012-07-10 | 2012-07-10 | Closed water cooling system with double-evaporative cooling pressure |
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| CN103899369A (en) * | 2014-04-08 | 2014-07-02 | 章礼道 | Closed water cooling system with twin-jet nozzle for evaporative cooling |
| CN106017128A (en) * | 2016-06-30 | 2016-10-12 | 中国大唐集团科学技术研究院有限公司华东分公司 | Steam jet vacuum system with energy conservation evaluation device and operation method of steam jet vacuum system |
| CN106052419A (en) * | 2016-06-17 | 2016-10-26 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Jet-driven heat exchange system |
| CN112374747A (en) * | 2020-12-18 | 2021-02-19 | 江东科技有限公司 | Efficient cooling pipe and cooling method thereof |
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| CN104296550B (en) * | 2014-11-13 | 2016-06-08 | 山东钢铁股份有限公司 | A kind of gas refrigeration system |
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