CN104374799A - Rotating platform condensation heat transfer experimental device and rotating platform condensation heat transfer experimental method - Google Patents
Rotating platform condensation heat transfer experimental device and rotating platform condensation heat transfer experimental method Download PDFInfo
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Abstract
The invention discloses a rotating platform condensation heat transfer experimental device and a rotating platform condensation heat transfer experimental method. According to the method, an operating state of a drying cylinder can be accurately simulated. Various thermal parameters of a channel are transmitted to a computer in a wireless transmission mode, and the rotating speed of a rotating disc can be adjusted, so that the drying cylinders with different speeds can be simulated. The device consists of a constant temperature chamber, a vertical rotating platform and a condensation heat transfer experimental section applied to the platform, wherein the condensation heat transfer experimental section is divided into two parts, namely a steam section and a cooling agent section. According to the device and the method, a steam condensation phenomenon in the cylinder in the process of operating the drying cylinder can be accurately simulated.
Description
Technical field
The invention belongs to two-phase flow experiment measuring technical field, relate to vertical rotation platform, steam generates and condensation method, Condensation shooting and automatic regulation experiment parameter method, be specifically related to a kind of rotation platform condensation heat-transfer experiment device and method.
Background technology
China is the large paper production state of the first in the world, and paper industry is the mainstay industry of Chinese national economy.Paper machine is as the topmost equipment in papermaking equipment, and its research and development has very important effect to development China Paper-making equipment industry.Dryer Section of Paper Machine is as huge in paper machine and that energy consumption is higher part, and its quality is about 60% ~ 70% of paper machine gross mass, and cost of equipment and power consumption all account for more than 50% of whole paper machine, and steam consumption accounts for 5% ~ 15% of page production cost.
Drying cylinder is topmost equipment in Dryer Section of Paper Machine.In traditional cylinder dried, steam enters in the drying cylinder of rotation, pass into the steam condensation under saturation temperature in drying cylinder, liberated heat overcomes each layer thermal resistance and is transmitted to the drying that page evaporation surface carries out page, need to overcome multiple heat transfer resistance in the process of steam by traditional cylinder dried paper, wherein topmost thermal resistance is exactly because the condensate water condensate water heat transfer resistance produced not in time discharged by drying cylinder, its thermal resistance reaches as high as 87 times of cylinder wall thermal resistance, so high thermal resistance declines causing the drying efficiency of drying cylinder, whole paper machine heating system also can be had a strong impact on simultaneously.
Investigate the heat-transfer capability of hyperchannel drying cylinder, namely will obtain the situation of condensation heat transfer in steam pipe.At present for condensing heat-exchange in steam pipe, experimental study is irreplaceable approach.But pipeline condensation when existing experimental study mainly concentrates on static, less to pipeline condensation research when rotating, especially vertically turntable rotates.And experimental provision is the hardware facility that acquisition authentic data must lean on, this just needs a kind of vapor condensation heat-exchange experimental provision being applicable to turntable and vertically rotating.In published condensation test device, number of patent application is 201410079201.5, and denomination of invention is that the patent of invention of " a kind of single tube heat exchange property test experimental bed " discloses a kind of experimental provision measuring static single tube heat exchange property.But this invention can only be tested the in-tube condensation phenomenon under stationary state, cannot measure the in-tube condensation situation under rotation status; Number of patent application is 200810018737.0, and denomination of invention is that the patent of invention of " under flight load function two phase flow ground simulation test method and device " discloses and a kind ofly utilizes flight dynamic load analog platform simulated aircraft dynamic load state thus carry out the device and method of two-phase flow experiment.The method obtains different centripetal accelerations by the rotational speed adjusting rotating disk, in order to simulated flight load, thus two phase flow ground simulation test under carrying out flight load function on the ground.But the turntable of this invention can only horizontally rotate, and can not vertically rotate, with the actual operating grave fault of drying cylinder.
Summary of the invention
The object of the invention is to the blank filling up above-mentioned prior art, a kind of rotation platform condensation heat-transfer experiment device and the method that really can simulate the true running status of drying cylinder are provided.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of rotation platform condensation heat-transfer experiment device, comprises rotating disk, and the medium loop be installed on rotating disk and coolant circuit; The axis of rotating disk is fixedly connected with main shaft, and main shaft is fixedly connected with the output shaft of buncher;
Medium loop comprises and exports to by medium experiment tube the aftercooler, medium pump, gas-liquid separator, generator and the superheater that connect successively between entrance; Coolant circuit comprises and exports to by cooling medium experiment tube the refrigeratory, cooling medium pump and the reheater that connect successively between entrance; Medium experiment tube and cooling medium experiment tube are arranged side by side, and enable the medium in medium experiment tube and the cooling medium in cooling medium experiment tube carry out heat interchange.
Described medium experiment tube is exported between entrance and is connected with the first retaining valve, aftercooler, the second retaining valve, the first stop valve, medium pump, the second stop valve, gas-liquid separator, the first buffer tank, the 3rd retaining valve, first-class gauge, generator, superheater, variable valve and second gauge in turn by pipeline;
Cooling medium experiment tube is exported between entrance and is connected with the 4th retaining valve, refrigeratory, the 3rd stop valve, cooling medium pump, the 4th stop valve, the second buffer tank, the 3rd flowmeter, reheater and the 5th retaining valve in turn by pipeline.
This device also comprises measuring system, measuring system comprises the differential pressure pickup be arranged between the import and export of cooling medium experiment tube, the first thermopair group is provided with in the middle part of cooling medium experiment tube, the wall of medium experiment tube is welded with the second thermopair group, pipeline between second gauge and cooling medium experiment tube entrance is provided with the first warming and pressure sensitivity, the pipeline of reheater and cooling medium experiment tube entrance is provided with the second warming, first warming, pressure sensitivity, differential pressure pickup, first thermopair group, second thermopair group, second warming, 3rd flowmeter, second gauge is all connected with the collector be installed on rotating disk by signal wire with first-class gauge, cooling medium pump, superheater, variable valve, generator, medium pump and reheater are all connected with the controller be installed on rotating disk by control line.
Described collector and controller are all communicated with computer by bluetooth or wireless mode.
Described refrigeratory, cooling medium pump, the 3rd flowmeter, second gauge, superheater, generator, first-class gauge, gas-liquid separator, medium pump, aftercooler and reheater are all fixed on the axis of rotating disk.
Described gas-liquid separator is connected with blowdown valve, and the gas vent of gas-liquid separator is connected by the outlet of pipeline with the first retaining valve, and on this pipeline, be provided with the 6th retaining valve.
Described rotating disk axis is fixed with for electricity is printed to the brush on rotation platform, brush is connected with the block terminal be installed on rotating disk by cable, the outside of rotating disk is also fixed with for adjusting the monolateral quality of rotating disk, makes postrotational rotating disk reach dynamic balance weight.
Whole device is placed in confined space, is also provided with conditioner in confined space.
Described medium pump and cooling medium pump are frequency conversion or capacity pump; Generator, superheater and reheater adopt electrically heated mode to heat; Aftercooler and refrigeratory are air cooling heat exchanger.
The invention also discloses a kind of rotation platform condensing heat-exchange experimental technique, comprise the following steps:
1) medium circulation
Opening generator makes inner media fluid be evaporated to saturated vapour, then produce superheated vapor by superheater and pass into medium experiment tube, condensation is produced by the coolant cools flowed through in cooling medium experiment tube, condensed media fluid or gas-liquid mixture flow through aftercooler hot-side channel, lowered the temperature from the cold wind of cold side and became cold media fluid, pump in gas-liquid separator by medium pump, the uncooled medium steam of part enters aftercooler again by bypass line, and the cold media fluid of mistake of gas-liquid separator outlet again flows in generator and completes medium circulation;
The signal of second gauge collection enters in collector, by bluetooth or wireless network transmissions in computer, according to the flow preset by computer by control signal by bluetooth or wireless network transmissions in controller, adjust generator electrical heating power by controller, finally make flow reach preset value;
The signal of the first warming collection enters in collector, by bluetooth or wireless network transmissions in computer, according to the overtemperature preset by computer by control signal by bluetooth or wireless network transmissions in controller, adjust superheater electrical heating power by controller, finally make overtemperature reach preset value;
The signal of pressure sensitivity collection enters in collector, by bluetooth or wireless network transmissions in computer, according to the pressure preset by computer by control signal by bluetooth or wireless network transmissions in controller, adjust control valve opening by controller, finally make pressure reach preset value;
The signal of first-class gauge collection enters in collector, by bluetooth or wireless network transmissions in computer, with the throughput ratio of second gauge comparatively, by computer by control signal by bluetooth or wireless network transmissions in controller, adjust medium pump flow by controller, finally make the absolute ratio of the difference of the flow of first-class gauge and second gauge and first-class gauge flow be less than 5%;
2) cooling medium circulation
Cooling medium pumps into after coolant temperature is elevated to requirement of experiment value by reheater and enters in cooling medium experiment tube by unlatching cooling medium pump, the high temperature coolant flowing out cooling medium experiment tube enters the hot side of refrigeratory, lowered the temperature by the cold wind flowing through refrigeratory cold side, again enter cooling medium pump, complete cooling medium circulation;
The signal of the 3rd flowmeter collection enters in collector, by bluetooth or wireless network transmissions in computer, compare with preset flow, by computer by control signal by bluetooth or wireless network transmissions in controller, adjust cooling medium pump flow by controller, finally make flow reach preset value;
The signal of the second warming collection enters in collector, by bluetooth or wireless network transmissions in computer, compare with preset temperature, by computer by control signal by bluetooth or wireless network transmissions in controller, adjust reheater heating power by controller, finally make temperature reach preset value.
Compared with prior art, the present invention has following beneficial effect:
All testing equipments are all fixed on a spinstand by the present invention, and experiment pipeline section can directly be connected by obstructed over-rotation joint with other equipment, decreases issuable leakage problem; Experimental facilities is substantially all fixed on axis and goes out, and decreases the centrifugal action that rotation brings to greatest extent; Measured experimental data is sent by wireless signal, and is received by the computer placed outward at experiment table, the trouble that the transmission mode avoiding tradition data line is brought; Experimental section is visualized experiment, can by Condensation in video camera shooting pipe; Whole experiment table is placed in constant temperature enclosure, makes the cooling device temperature difference constant, and whole system is run more stable.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail:
See Fig. 1, rotation platform condensation heat-transfer experiment device of the present invention is by rotation platform, medium loop, coolant circuit and measuring system.Described rotation platform is made up of rotating disk 001, buncher 003, main shaft 004, counterweight 006; Medium loop is made up of generator 101, superheater 102, medium experiment tube 106, aftercooler 108, medium pump 111 and gas-liquid separator 113; Coolant circuit is made up of cooling medium experiment tube 208, refrigeratory 206, cooling medium pump 204 and reheater 210;
Rotation platform condensation heat-transfer experiment device shown in Fig. 1, medium experiment tube 106 is exported between medium experiment tube 106 entrance and is connected with retaining valve 107, aftercooler 108, retaining valve 109, stop valve 110, medium pump 111, stop valve 112, gas-liquid separator 113, buffer tank 115, retaining valve 116, flowmeter 117, generator 111, superheater 102, variable valve 103 and flowmeter 104 in turn by pipeline; Gas-liquid separator 113 is connected with blowdown valve 114, gas-liquid separator 113 to be exported with retaining valve 107 by pipeline and is connected, and pipeline is provided with retaining valve 112;
Cooling medium experiment tube 208 is exported between cooling medium experiment tube 208 entrance and is connected with retaining valve 207, refrigeratory 206, stop valve 205, cooling medium pump 204, stop valve 203, buffer tank 202, flowmeter 201, reheater 21 and retaining valve 209 in turn by pipeline;
Rotating disk 001 axis and main shaft 004 are fixed together, and main shaft 004 is connected with buncher 003, and axis is fixed with brush 005 with rotating disk 001, and brush 005 is connected with block terminal 002 by cable, is fixed with counterweight 006 outside rotating disk 001;
Cooling medium experiment tube 208 is placed with differential pressure pickup 1003 between importing and exporting, thermopair group 1004 is placed with in the middle part of cooling medium experiment tube 208, medium experiment tube 106 wall is welded with thermopair group 1005, between flowmeter 104 and cooling medium experiment tube 208 entrance, pipeline is placed with warming 1001 and pressure sensitivity 1002, reheater 210 and coolant hose 208 inlet duct are placed with warming 1006, warming 1001, pressure sensitivity 1002, differential pressure pickup 1003, thermopair group 1004, thermopair group 1005, warming 1006, flowmeter 201, flowmeter 104 is connected with collector 006 by signal wire with flowmeter 117, cooling medium pump 204, superheater 102, variable valve 103, generator 101, medium pump 111 is connected with controller 007 by control line with reheater 210,
Refrigeratory 206, cooling medium pump 204, flowmeter 201, flowmeter 104, superheater 102, generator 101, flowmeter 117, gas-liquid separator 113, medium pump 111, aftercooler 108 and reheater 210 are fixed on rotating disk 001 axis;
Rotation platform condensation heat-transfer experiment device is placed in confined space 01, confined space 01 is provided with conditioner 02; Collector 006 is connected with computer 1000 by Bluetooth signal or wireless network signal with controller 007; Medium pump 111 and cooling medium pump 204 are frequency conversion or capacity pump; Generator 101, superheater 102 and reheater 210 are heated by Electric heating; Aftercooler 108 and refrigeratory 206 are air cooling heat exchanger;
A kind of rotation platform condensing heat-exchange experimental technique comprises following process:
1) medium circulation
Opening generator 101 makes inner media fluid be evaporated to saturated vapour, then produce superheated vapor by superheater 102 and pass into medium experiment tube 106, condensation is produced by the coolant cools flowed through in cooling medium experiment tube 208, condensed media fluid or gas-liquid mixture flow through aftercooler 108 hot-side channel, lowered the temperature from the cold wind of cold side and became cold media fluid, pump in gas-liquid separator 113 by medium pump 111, the uncooled medium steam of part enters aftercooler 108 again by bypass line, the cold media fluid of mistake that gas-liquid separator 113 exports again flows in generator 101 and completes medium circulation,
The signal that flowmeter 104 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, according to the flow preset by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust generator 101 electrical heating power by controller 007, finally make flow reach preset value;
The signal that warming 1001 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, according to the overtemperature preset by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust superheater 102 electrical heating power by controller 007, finally make overtemperature reach preset value;
The signal that pressure sensitivity 1002 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, according to the pressure preset by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust variable valve 103 aperture by controller 007, finally make pressure reach preset value;
The signal that flowmeter 117 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, with the throughput ratio of flowmeter 104 comparatively, by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust medium pump 111 flow by controller 007, finally make the difference of the flow of flowmeter 117 and flowmeter 104 be less than certain value;
2) cooling medium circulation
Cooling medium pumps into after coolant temperature is elevated to desired value by reheater 210 and enters in cooling medium experiment tube 208 by unlatching cooling medium pump 204, due to the heat release of medium experiment tube 106 medium condenses, coolant temperature raises gradually, the high temperature coolant flowing out cooling medium experiment tube 208 enters the hot side of refrigeratory 206, lowered the temperature by the cold wind flowing through refrigeratory 206 cold side, again enter cooling medium pump 204, complete cooling medium circulation;
The signal that flowmeter 201 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, compare with preset flow, by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust cooling medium pump 204 flow by controller 007, finally make flow reach preset value;
The signal that warming 1006 gathers enters in collector 006, by bluetooth or wireless network transmissions in computer 1000, compare with preset temperature, by computer 1000 by control signal by bluetooth or wireless network transmissions in controller 007, adjust reheater 210 heating power by controller 007, finally make temperature reach preset value.
The preferred specific embodiment of the present invention described by reference to the accompanying drawings is above only for illustration of embodiments of the present invention; instead of as the restriction to aforementioned invention object and appended claims content and scope; every according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong to claims of the present invention category required for protection.
Claims (10)
1. a rotation platform condensation heat-transfer experiment device, is characterized in that: comprise rotating disk (001), and the medium loop be installed on rotating disk (001) and coolant circuit; The axis of rotating disk (001) is fixedly connected with main shaft (004), and main shaft (004) is fixedly connected with the output shaft of buncher (003);
Medium loop comprises and exports to by medium experiment tube (106) aftercooler (108), medium pump (111), gas-liquid separator (113), generator (101) and the superheater (102) that connect successively between entrance; Coolant circuit comprises and exports to by cooling medium experiment tube (208) refrigeratory (206), cooling medium pump (204) and the reheater (210) that connect successively between entrance; Medium experiment tube (106) and cooling medium experiment tube (208) are arranged side by side, and enable the cooling medium in the medium in medium experiment tube (106) and cooling medium experiment tube (208) carry out heat interchange.
2. rotation platform condensation heat-transfer experiment device according to claim 1, it is characterized in that: described medium experiment tube (106) is exported between entrance and is connected with the first retaining valve (107) in turn by pipeline, aftercooler (108), second retaining valve (109), first stop valve (110), medium pump (111), second stop valve (112), gas-liquid separator (113), first buffer tank (115), 3rd retaining valve (116), first-class gauge (117), generator (101), superheater (102), variable valve (103) and second gauge (104),
Cooling medium experiment tube (208) is exported between entrance and is connected with the 4th retaining valve (207), refrigeratory (206), the 3rd stop valve (205), cooling medium pump (204), the 4th stop valve (203), the second buffer tank (202), the 3rd flowmeter (201), reheater (21) and the 5th retaining valve (209) in turn by pipeline.
3. rotation platform condensation heat-transfer experiment device according to claim 2, it is characterized in that: also comprise measuring system, measuring system comprises the differential pressure pickup (1003) be arranged between cooling medium experiment tube (208) import and export, cooling medium experiment tube (208) middle part is provided with the first thermopair group (1004), the wall of medium experiment tube (106) is welded with the second thermopair group (1005), pipeline between second gauge (104) and cooling medium experiment tube (208) entrance is provided with the first warming (1001) and pressure sensitivity (1002), the pipeline of reheater (210) and cooling medium experiment tube (208) entrance is provided with the second warming (1006), first warming (1001), pressure sensitivity (1002), differential pressure pickup (1003), first thermopair group (1004), second thermopair group (1005), second warming (1006), 3rd flowmeter (201), second gauge (104) and first-class gauge (117) are all connected with the collector (006) be installed on rotating disk (001) by signal wire, cooling medium pump (204), superheater (102), variable valve (103), generator (101), medium pump (111) and reheater (210) are all connected with the controller (007) be installed on rotating disk (001) by control line.
4. rotation platform condensation heat-transfer experiment device according to claim 3, is characterized in that: described collector (006) and controller (007) are all communicated with computer (1000) by bluetooth or wireless mode.
5. the rotation platform condensation heat-transfer experiment device according to Claims 2 or 3 or 4, is characterized in that: described refrigeratory (206), cooling medium pump (204), the 3rd flowmeter (201), second gauge (104), superheater (102), generator (101), first-class gauge (117), gas-liquid separator (113), medium pump (111), aftercooler (108) and reheater (210) are all fixed on the axis of rotating disk (001).
6. the rotation platform condensation heat-transfer experiment device according to Claims 2 or 3 or 4, it is characterized in that: described gas-liquid separator (113) is connected with blowdown valve (114), the gas vent of gas-liquid separator (113) is connected by the outlet of pipeline with the first retaining valve (107), and on this pipeline, be provided with the 6th retaining valve (112).
7. the rotation platform condensation heat-transfer experiment device according to claim 1 or 2 or 3 or 4, it is characterized in that: described rotating disk (001) axis is fixed with for electricity is printed to the brush (005) on rotation platform, brush (005) is connected with the block terminal (002) be installed on rotating disk (001) by cable, the outside of rotating disk (001) is also fixed with for adjusting rotating disk (001) monolateral quality, makes postrotational rotating disk (001) reach dynamic balance weight (006).
8. the rotation platform condensation heat-transfer experiment device according to claim 1 or 2 or 3 or 4, it is characterized in that: whole device is placed in confined space (01), is also provided with conditioner (02) in confined space (01).
9. rotation platform condensation heat-transfer experiment device according to claim 2, is characterized in that: described medium pump (111) and cooling medium pump (204) are frequency conversion or capacity pump; Generator (101), superheater (102) and reheater (210) adopt electrically heated mode to heat; Aftercooler (108) and refrigeratory (206) are air cooling heat exchanger.
10. adopt a rotation platform condensing heat-exchange experimental technique for device as claimed in claim 3, it is characterized in that, comprise the following steps:
1) medium circulation
Opening generator (101) makes inner media fluid be evaporated to saturated vapour, then produce superheated vapor by superheater (102) and pass into medium experiment tube (106), condensation is produced by the coolant cools flowed through in cooling medium experiment tube (208), condensed media fluid or gas-liquid mixture flow through aftercooler (108) hot-side channel, lowered the temperature from the cold wind of cold side and became cold media fluid, pump in gas-liquid separator (113) by medium pump (111), the uncooled medium steam of part enters aftercooler (108) again by bypass line, the cold media fluid of mistake that gas-liquid separator (113) exports again flows in generator (101) and completes medium circulation,
The signal that second gauge (104) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), according to the flow preset by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust generator (101) electrical heating power by controller (007), finally make flow reach preset value;
The signal that first warming (1001) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), according to the overtemperature preset by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust superheater (102) electrical heating power by controller (007), finally make overtemperature reach preset value;
The signal that pressure sensitivity (1002) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), according to the pressure preset by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust variable valve (103) aperture by controller (007), finally make pressure reach preset value;
The signal that first-class gauge (117) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), with the throughput ratio of second gauge (104) comparatively, by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust medium pump (111) flow by controller (007), finally make the absolute ratio of the difference of the flow of first-class gauge (117) and second gauge (104) and first-class gauge (117) flow be less than 5%;
2) cooling medium circulation
Cooling medium pumps into after coolant temperature is elevated to requirement of experiment value by reheater (210) and enters in cooling medium experiment tube (208) by unlatching cooling medium pump (204), the high temperature coolant flowing out cooling medium experiment tube (208) enters refrigeratory (206) hot side, lowered the temperature by the cold wind flowing through refrigeratory (206) cold side, again enter cooling medium pump (204), complete cooling medium circulation;
The signal that 3rd flowmeter (201) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), compare with preset flow, by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust cooling medium pump (204) flow by controller (007), finally make flow reach preset value;
The signal that second warming (1006) gathers enters in collector (006), by bluetooth or wireless network transmissions in computer (1000), compare with preset temperature, by computer (1000) by control signal by bluetooth or wireless network transmissions in controller (007), adjust reheater (210) heating power by controller (007), finally make temperature reach preset value.
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| CN111220642A (en) * | 2020-01-15 | 2020-06-02 | 西安交通大学 | Convection condensation experiment system and method in mixed working medium marangoni condensation pipe |
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| CN105136843A (en) * | 2015-05-11 | 2015-12-09 | 中国核动力研究设计院 | Gas-liquid two phase thermal-engineering experiment heat loss calibration method and calibration device |
| CN108872304A (en) * | 2018-06-25 | 2018-11-23 | 西安交通大学 | A kind of steam generator inclination tube bank local heat transfer device and method |
| CN108872304B (en) * | 2018-06-25 | 2019-04-09 | 西安交通大学 | A kind of steam generator inclination tube bank local heat transfer device and method |
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| CN111220642B (en) * | 2020-01-15 | 2021-09-03 | 西安交通大学 | Convection condensation experiment system and method in mixed working medium marangoni condensation pipe |
| CN112362697A (en) * | 2020-11-30 | 2021-02-12 | 西南石油大学 | Inner tube rotating concentric sleeve forced convection heat exchange experimental device and method |
| CN112362697B (en) * | 2020-11-30 | 2024-03-08 | 西南石油大学 | Device and method for forced convection heat exchange experiment of concentric sleeve with rotating inner tube |
| CN112964747A (en) * | 2021-03-10 | 2021-06-15 | 北京科技大学 | Gas condensation visualization and heat exchange characteristic detection device and method |
| CN115930392A (en) * | 2022-12-22 | 2023-04-07 | 珠海格力电器股份有限公司 | Control method of air conditioning system, air conditioning system and medium |
| CN118032081A (en) * | 2024-04-11 | 2024-05-14 | 九未实业(上海)有限公司 | Constant-temperature type high-precision gas flow sensor |
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