CN102175351A - Device for testing thermal performance and fluid resistance of liquid-liquid heat exchanger - Google Patents

Device for testing thermal performance and fluid resistance of liquid-liquid heat exchanger Download PDF

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Publication number
CN102175351A
CN102175351A CN 201110059514 CN201110059514A CN102175351A CN 102175351 A CN102175351 A CN 102175351A CN 201110059514 CN201110059514 CN 201110059514 CN 201110059514 A CN201110059514 A CN 201110059514A CN 102175351 A CN102175351 A CN 102175351A
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China
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low
temperature
heat
thermal source
vessel
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CN 201110059514
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CN102175351B (en
Inventor
张中清
陈永东
修维红
朱兴林
孙成军
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National Heat Exchange Products Quality Testing & Inspection Center
Hefei General Machinery Research Institute Co Ltd
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National Heat Exchange Products Quality Testing & Inspection Center
Hefei General Machinery Research Institute Co Ltd
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Abstract

The invention discloses a device for testing thermal performance and fluid resistance of a liquid-liquid heat exchanger. The device is characterized in that a heat source medium container consists of a high-temperature container and a low-temperature container, which are arranged separately; heat source medium outlet pipelines of the high-temperature container and the low-temperature container are respectively connected with a heat source three-way regulating valve; a heat source variable frequency pump is arranged in the heat source medium outlet pipeline of the heat source three-way regulating valve; the outlet pipeline of the heat source variable frequency pump is connected to the heat source medium inlet of the tested heat exchanger; a steam heat exchanging unit is arranged in the heat source medium outlet pipeline of the tested heat exchanger; the heat source medium subjected to heat exchange in the tested heat exchanger is heated by the steam heat exchanging unit, and flows back to the high-temperature container; and an auxiliary electric heater is arranged in the high-temperature container. The device can realize fast detection and adjustment, effectively and stably control the temperature fluctuations of cooling and heat sources and reduce the error of a testing system.

Description

Liquid-liquid heat interchanger thermal technology's performance and fluid resistance proving installation
Technical field
The present invention relates to a kind of liquid-liquid heat interchanger thermal technology's performance and fluid resistance proving installation, the test unit of more specifically saying so and carrying out thermal property and fluid resistance test at the liquid-liquid heat interchanger (as shell-and-tube heat exchanger, plate type heat exchanger, spiral-plate exchanger etc.) that is widely used in the fields such as oil, chemical industry, power, aviation, machinery.
Background technology
Heat interchanger product energy-conservation is major tasks in the energy conservation of highly energy-consuming special equipment, and energy-conservation evaluation index complexity, difficulty are big.Test unit is mainly used in the detection of heat interchanger product heat transfer property and resistance drop.The energy-efficient product of exploitation that is determined as of heat interchanger thermal technology performance and fluid resistance provides important basis with the characteristic of examining the quality of the production.
At present, at the industrial test unit of heat interchanger product mainly is that liquid-liquid according to foundation shown in Figure 1 is measured system, in this system, thermal source medium in the thermal source agent reservoir 3 by electric heater 4 be heated to the test temperature required, be transported to test specimen 2 by pump, get back in the thermal source agent reservoir 3 through heat exchange; Low-temperature receiver medium in the low-temperature receiver agent reservoir 1 is transported to test specimen 2 by pump and carries out heat exchange with the thermal source medium, in low-temperature receiver agent reservoir 1, directly get back in the low-temperature receiver agent reservoir 1 by another part through the cooling for reflux of open type cooling tower 5 for a low-temperature receiver medium part after the heat exchange.Test datas such as the import and export temperature difference according to rate-of flow, thermal source medium and low-temperature receiver medium are carried out the calculating of cold and hot side heat respectively; Cold and hot side liquid drag characteristic is measured by cold and hot wall pressure or differential pressure gauge respectively.Thermal property through a plurality of different operating points detects, and finally provides the thermal property comprehensive detection result of heat transmission equipment.
In actual the use, there is following problem in this pilot system:
1, on the one hand, in test process,, the blending of reflux medium is arranged all the time in the thermal source agent reservoir after lowering the temperature through test specimen, can't realize adjustment, cause system temperature not stablize because hot side medium turns back in the thermal source agent reservoir; On the other hand, the low-temperature receiver medium cooling mode of open type cooling tower makes the temperature of low-temperature receiver medium behind the process cooling tower usually a little more than local air ' s wet bulb temperature, and the operating point temperature can't be carried out temperature control when changing up and down in process of the test; Therefore have operating point test data instability, the test data error is bigger than normal and problem such as test data distortion.
2, in case surpassed needed test temperature because of the temperature of thermal source medium is heated, then temperature reduction way is a kind of is by test specimen the thermal source medium temperature to be reduced, and another kind is a natural cooling, and this dual mode both wasted energy, be unfavorable for again the continuation tested having prolonged test period;
3, the low-temperature receiver medium is to dispel the heat by the open type cooling tower in the existed system, if because the singularity of low-temperature receiver medium, can not directly use the open type cooling tower, then needing increases intercooler or utilizes intermediary to lower the temperature, increase the secondary heat transfer thus, increased the temperature control difficulty of low-temperature receiver medium.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of liquid-liquid heat interchanger thermal technology's performance and fluid resistance proving installation is provided, in the hope of realization fast detecting, quick adjustment, and the temperature fluctuation of effectively stable control Cooling and Heat Source, the pilot system error reduced.
Technical solution problem of the present invention adopts following technical scheme:
The design feature of liquid of the present invention-liquid heat interchanger thermal technology's performance and fluid resistance proving installation is:
The thermal source media Containers is to be made of the elevated temperature vessel of split setting and low-temperature (low temperature) vessel, directly is communicated with pipeline between elevated temperature vessel and the low-temperature (low temperature) vessel; The thermal source media outlet pipeline of elevated temperature vessel and low-temperature (low temperature) vessel connects the thermal source three-way control valve respectively, in the thermal source media outlet pipeline of thermal source three-way control valve, the thermal source variable frequency pump is set, connects the thermal source medium inlet of tested heat interchanger with the export pipeline of described thermal source variable frequency pump; In the thermal source media outlet pipeline of described tested heat interchanger the steam heat-exchanging unit is set, the thermal source medium of finishing heat interchange in tested heat interchanger is back to elevated temperature vessel after the steam heat-exchanging unit heats up; In described elevated temperature vessel, electrical auxiliary heater is set;
The low-temperature receiver media outlet pipeline of low-temperature receiver media Containers connects the low-temperature receiver three-way control valve, and the low-temperature receiver variable frequency pump is set in the export pipeline of described low-temperature receiver three-way control valve, connects the low-temperature receiver medium inlet of tested heat interchanger with the export pipeline of described low-temperature receiver variable frequency pump; The low-temperature receiver medium one tunnel of finishing heat interchange in described tested heat interchanger is back to the low-temperature receiver media Containers through cooling tower, and the low-temperature receiver three-way control valve is directly inserted on another road;
The Cooling and Heat Source heat exchange unit is set, and described Cooling and Heat Source heat exchange unit is to be heat transferring medium with thermal source medium in the low-temperature (low temperature) vessel and the low-temperature receiver medium in the low-temperature receiver container;
Described cooling tower adopts closed cooling tower.
Compared with prior art, beneficial effect of the present invention is embodied in:
1, the present invention is directed to the thermal source medium elevated temperature vessel and low-temperature (low temperature) vessel are set respectively, thermal source three-way control valve and low-temperature receiver three-way control valve are set respectively, can mate according to the fast temperature of the temperature required realization medium of test, thereby the setup time that can reduce test greatly, the test duration shortened;
2, the present invention can guarantee the needs of default test specimen operating mode by the flow control of the co-ordination realization medium of thermal source variable frequency pump, low-temperature receiver variable frequency pump, thermal source three-way control valve and low-temperature receiver three-way control valve, and stability of flow is accurate;
3, the present invention adopts two kinds of thermal source supply modes of steam heat-exchanging and electric heater heating, and on the one hand, the condensate water in the steam heat-exchanging process can return boiler by recovery and carry out secondary utilization, energy-conserving and environment-protective; On the other hand, can utilize controllable silicon to regulate the electrical heating power of electrical auxiliary heater, with this high power running that reduces boiler in the steam heat-exchanging unit, energy-saving effect is more remarkable;
4, the present invention adopts closed cooling tower, has avoided the pollution of low-temperature receiver medium, and reduces the secondary heat transfer;
Description of drawings
Fig. 1 is the prior art structural representation.
Label among Fig. 1: 1 low-temperature receiver agent reservoir; 2 test specimens; 3 thermal source agent reservoir; 4 electric heaters; 5 open type cooling towers.
Fig. 2 is a structural representation of the present invention.
Label among Fig. 2: 1 elevated temperature vessel; 2 low-temperature (low temperature) vessels; 3 electrical auxiliary heaters; 4 steam heat-exchanging unit; 5 Cooling and Heat Source heat exchange units; 6 thermal source variable frequency pumps; 7 thermal source three-way control valves; 8 low-temperature receiver media Containers; 9 cooling towers; 10 low-temperature receiver variable frequency pumps; 11 low-temperature receiver three-way control valves; 12 test specimens; 13 condensate water recovery devices; 14 boilers.
Embodiment
Referring to Fig. 2, in the present embodiment, the thermal source media Containers is to be made of the elevated temperature vessel 1 of split setting and low-temperature (low temperature) vessel 2, directly is communicated with pipeline between elevated temperature vessel 1 and the low-temperature (low temperature) vessel 2; The thermal source media outlet pipeline of elevated temperature vessel 1 and low-temperature (low temperature) vessel 2 connects thermal source three-way control valve 7 respectively, in the thermal source media outlet pipeline of thermal source three-way control valve 7, thermal source variable frequency pump 6 is set, connects the thermal source medium inlet of tested heat interchanger 12 with the export pipeline of thermal source variable frequency pump 6; In the thermal source media outlet pipeline of tested heat interchanger 12 steam heat-exchanging unit 4 is set, the thermal source medium of finishing heat interchange in tested heat interchanger 12 is back to elevated temperature vessel 1 after steam heat-exchanging unit 4 heats up; Cluster type electrical auxiliary heater 3 is set in elevated temperature vessel 1;
In the present embodiment, condensate water in the steam heat-exchanging unit 4 is set returns boiler 14 by condensate water recovery device 13 and carry out the secondary utilization, in order to energy-conserving and environment-protective;
The low-temperature receiver media outlet pipeline of low-temperature receiver media Containers 8 connects low-temperature receiver three-way control valve 11, and low-temperature receiver variable frequency pump 10 is set in the export pipeline of low-temperature receiver three-way control valve 11, connects the low-temperature receiver medium inlet of tested heat interchanger 12 with the export pipeline of low-temperature receiver variable frequency pump 10; The low-temperature receiver medium one tunnel of finishing heat interchange in tested heat interchanger 12 is back to low-temperature receiver media Containers 8 through cooling tower 9, and low-temperature receiver three-way control valve 11 is directly inserted on another road;
Cooling and Heat Source heat exchange unit 5 is set, and Cooling and Heat Source heat exchange unit 5 is to be heat transferring medium with thermal source medium in the low-temperature (low temperature) vessel 2 and the low-temperature receiver medium in the low-temperature receiver container 8;
Cooling tower 9 adopts closed cooling tower.
Process of the test:
At first, utilize the steam heat-exchanging unit that the thermal source medium is heated to above the temperature T i of test specimen thermal source medium, reality is approximately higher than 5 ℃ of test specimen thermal source medium temperatures greatly; Open cold origin system medium circulation system.
Thermal source circulation system temperature control: according to the requirement of test specimen thermal source medium inlet temperature, and thermal source variable frequency pump 6 pump discharge temperature signals are fed back to the PLC control system of thermal source three-way control valve 7, the PLC control system is calculated according to the medium temperature in high temperature heat source container and the low-temperature heat source container, the aperture size of reasonable distribution thermal source three-way control valve 7 is accurately controlled heat source side test specimen inlet temperature.
Thermal source circulation system flow control: according to the thermal source rate-of flow of test specimen, by the PLC control system flow signal of pipe system actual measurement is fed back to thermal source variable frequency pump 6 and bypass flow regulator, adjust the running frequency of pump by flow control valve and thermal source variable frequency pump 6 variable frequency pumps, the operation revolution of control pump is to reach the adjusting traffic requirement.
Low-temperature receiver circulation system temperature control: according to the requirement of test specimen low-temperature receiver medium inlet temperature, and low-temperature receiver variable frequency pump 10 pump discharge temperature signals are fed back to the PLC control system of low-temperature receiver three-way control valve 11, the PLC control system is calculated according to the medium temperature and the test specimen loop pipeline medium temperature of low-temperature receiver container, the aperture size of reasonable distribution low-temperature receiver three-way control valve 11 is accurately controlled low-temperature receiver side test specimen inlet temperature.
Low-temperature receiver circulation system flow control: according to the low-temperature receiver rate-of flow of test specimen, by the PLC control system flow signal of pipe system actual measurement is fed back to low-temperature receiver variable frequency pump 10 and bypass regulator valve, adjust the running frequency of pump by variable valve and low-temperature receiver variable frequency pump 10 variable frequency pumps, the operation revolution of control pump is to reach the adjusting traffic requirement.
After heat source system circulation and the whole unlatchings of cold source system circulation, when operating condition of test was stablized, the PLC acquisition system write down flow Lc, temperature T ci, temperature T co, pressure P ci, the pressure P co in flow Lh, temperature T hi, temperature T ho, pressure P hi, pressure P ho and the source circulation system in the thermal source circulation system respectively; Hot side heat in the test specimen calculates by test specimen thermal source medium out temperature and data on flows; The cold side heat calculates by test specimen low-temperature receiver medium out temperature and data on flows; Liquid source and heat source side fluid resistance characteristic are calculated by pressure pressure P hi, pressure P ho, pressure P ci, pressure P co respectively.As the thermal property detection of each heat interchanger of test specimen, finally provide the thermal property comprehensive detection result of heat interchanger through a plurality of different operating points.
M is that solenoid control signal, TC are that temperature control signals, FC are the flow feedback control signal among Fig. 2.

Claims (1)

1. a liquid-liquid heat interchanger thermal technology's performance and fluid resistance proving installation is characterized in that:
The thermal source media Containers is elevated temperature vessel (1) and low-temperature (low temperature) vessel (2) formation that is provided with by split, directly is communicated with pipeline between elevated temperature vessel (1) and the low-temperature (low temperature) vessel (2); The thermal source media outlet pipeline of elevated temperature vessel (1) and low-temperature (low temperature) vessel (2) connects thermal source three-way control valve (7) respectively, in the thermal source media outlet pipeline of described thermal source three-way control valve (7), thermal source variable frequency pump (6) is set, connects the thermal source medium inlet of tested heat interchanger (12) with the export pipeline of described thermal source variable frequency pump (6); In the thermal source media outlet pipeline of described tested heat interchanger (12) steam heat-exchanging unit (4) is set, the thermal source medium of finishing heat interchange in tested heat interchanger (12) is back to elevated temperature vessel (1) after heat up steam heat-exchanging unit (4); Electrical auxiliary heater (3) is set in described elevated temperature vessel (1);
The low-temperature receiver media outlet pipeline of low-temperature receiver media Containers (8) connects low-temperature receiver three-way control valve (11), low-temperature receiver variable frequency pump (10) is set in the export pipeline of described low-temperature receiver three-way control valve (11), connects the low-temperature receiver medium inlet of tested heat interchanger (12) with the export pipeline of described low-temperature receiver variable frequency pump (10); The low-temperature receiver medium one tunnel of finishing heat interchange in described tested heat interchanger (12) is back to low-temperature receiver media Containers (8) through cooling tower (9), and low-temperature receiver three-way control valve (11) is directly inserted on another road;
Cooling and Heat Source heat exchange unit (5) is set, and described Cooling and Heat Source heat exchange unit (5) is to be heat transferring medium with the low-temperature receiver medium in thermal source medium in the low-temperature (low temperature) vessel (2) and the low-temperature receiver container (8);
Described cooling tower (9) adopts closed cooling tower.
CN201110059514A 2011-03-11 2011-03-11 Device for testing thermal performance and fluid resistance of liquid-liquid heat exchanger Active CN102175351B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335860A (en) * 2013-07-03 2013-10-02 中国化学工程第十一建设有限公司 On-line evaluation system for thermal performance of modular heat exchanger
CN104280258A (en) * 2014-10-14 2015-01-14 洛阳双瑞特种装备有限公司 Comprehensive heat power engineering system used for heat exchanger test
CN106441797A (en) * 2016-08-25 2017-02-22 中国电子科技集团公司第十研究所 Automatic cold plate flow resistance testing system
CN106482973A (en) * 2016-11-15 2017-03-08 合肥通用机械研究院 Plate type heat exchanger liquid phase medium pressure fall-off test system and its method of testing

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EP1306653A1 (en) * 2001-10-29 2003-05-02 Wade W. Smith Water management system
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CN200962071Y (en) * 2006-10-26 2007-10-17 广东省吉荣空调设备公司 Test device of efficient water temperature constant internal circular water cooling machine unit
CN101446524A (en) * 2008-11-21 2009-06-03 合肥通用机械研究院 Heat exchanger performance testing device for air conditioning
CN101776353A (en) * 2010-02-10 2010-07-14 东南大学 Cooling tower-based solution type cold and hot water unit
CN202008414U (en) * 2011-03-11 2011-10-12 合肥通用机械研究院 Testing device for thermal performance and fluid resistance of liquid-liquid heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306653A1 (en) * 2001-10-29 2003-05-02 Wade W. Smith Water management system
US20030139894A1 (en) * 2002-01-14 2003-07-24 Ryan William J. Apparatus and methods for monitoring and testing coolant recirculation systems
CN200962071Y (en) * 2006-10-26 2007-10-17 广东省吉荣空调设备公司 Test device of efficient water temperature constant internal circular water cooling machine unit
CN101446524A (en) * 2008-11-21 2009-06-03 合肥通用机械研究院 Heat exchanger performance testing device for air conditioning
CN101776353A (en) * 2010-02-10 2010-07-14 东南大学 Cooling tower-based solution type cold and hot water unit
CN202008414U (en) * 2011-03-11 2011-10-12 合肥通用机械研究院 Testing device for thermal performance and fluid resistance of liquid-liquid heat exchanger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335860A (en) * 2013-07-03 2013-10-02 中国化学工程第十一建设有限公司 On-line evaluation system for thermal performance of modular heat exchanger
CN104280258A (en) * 2014-10-14 2015-01-14 洛阳双瑞特种装备有限公司 Comprehensive heat power engineering system used for heat exchanger test
CN104280258B (en) * 2014-10-14 2017-01-11 洛阳双瑞特种装备有限公司 Comprehensive heat power engineering system used for heat exchanger test
CN106441797A (en) * 2016-08-25 2017-02-22 中国电子科技集团公司第十研究所 Automatic cold plate flow resistance testing system
CN106441797B (en) * 2016-08-25 2019-01-08 中国电子科技集团公司第十研究所 The automatic flow resistance test macro of cold plate
CN106482973A (en) * 2016-11-15 2017-03-08 合肥通用机械研究院 Plate type heat exchanger liquid phase medium pressure fall-off test system and its method of testing

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