CN103323284A - Thermoelectric refrigeration performance measuring device and method - Google Patents
Thermoelectric refrigeration performance measuring device and method Download PDFInfo
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- CN103323284A CN103323284A CN 201310284365 CN201310284365A CN103323284A CN 103323284 A CN103323284 A CN 103323284A CN 201310284365 CN201310284365 CN 201310284365 CN 201310284365 A CN201310284365 A CN 201310284365A CN 103323284 A CN103323284 A CN 103323284A
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Abstract
The invention relates to a thermoelectric refrigeration performance measuring device and a thermoelectric refrigeration performance measuring method. The thermoelectric refrigeration performance measuring device is characterized in that a thermoelectric refrigeration module, a confined space and a water-cooled heat sink are arranged in a vacuum cavity, a section of heating wire is placed in the confined space, a thermal load is subjected to analog loading, the water-cooled heat sink is used for controlling the temperature of a hot end of the thermoelectric refrigeration module, the thermoelectric refrigeration module is positioned between the confined space serving as a cold end unit and the water-cooled heat sink serving as a hot end unit, a cold end thermocouple is arranged on a contact surface between the confined space and the thermoelectric refrigeration module, a hot end thermocouple is arranged on a contact surface between the water-cooled heat sink and the thermoelectric refrigeration module, the cold end thermocouple and the hot end thermocouple are used for acquiring the working temperatures of the cold end and the hot end and sending the working temperatures to a data acquisition instrument, a digital power meter is used for respectively acquiring the working voltage, the working current and the thermal electromotive force of the thermoelectric refrigeration module and the power of a heating wire, and a computer is used for receiving the data of the data acquisition instrument and the digital power meter and carrying out analytic processing on the data. The thermoelectric refrigeration performance measuring device is compact and reasonable in structure and simple and convenient in testing and has high testing accuracy.
Description
Technical field
The present invention relates to a kind of Refrigeration Technique, particularly a kind of thermoelectric cooling device for measuring properties and method thereof.
Background technology
Along with increasingly sharpening of energy crisis and environmental problem, the thermoelectric cooling mode characteristics outstanding with it based on thermoelectric effect have caused that people more and more pay close attention to.With other refrigeration modes, compare, the thermoelectric cooling mode has advantages of machinery-free moving component, compressor-free, does not use cold-producing medium, compact conformation, noiseless, pollution-free, long service life etc. are unique, is widely used in the instrument and equipment such as military affairs, space flight, the energy, microelectronics, optoelectronic device and industry and commerce product.The greatest problem that thermoelectric cooling mode practical application at present faces is that the refrigerating capacity of thermoelectric refrigerating module is little, is difficult to the electrothermal module performance is assessed, and the performance quality is closely related with the quality of refrigerating plant.
The important parameter of weighing thermoelectric cooling performance quality comprises refrigerating capacity Q, coefficient of performance and figure of merit Z, and classic method is calculated above-mentioned three parameter values according to theoretical formula often.In computation process, the theoretical experiment value that the value of Seebeck coefficient α, all-in resistance R and overall thermal conductance K provides according to electrothermal module production firm, ignored the variation of Seebeck coefficient, all-in resistance and overall thermal conductance that in actual use, the variation of electrothermal module working environment causes, therefore this computing method can not accurately be calculated refrigerating capacity, coefficient of refrigerating performance and the figure of merit of electrothermal module.And fewer about Seebeck coefficient, all-in resistance and the overall thermal conductance data under the different application operating mode of electrothermal module, only limit to the electrothermal module of several models commonly used.Under the practical application operating mode, although the measuring method of electrothermal module Seebeck coefficient, all-in resistance and overall thermal conductance is more, but there is the proving installation complex structure in existing test mode, test process is consuming time longer, the problems such as measuring accuracy is lower, especially in the measurement of the electrothermal module of use, most of method of testings have operability hardly.
Summary of the invention
The present invention be directed to existing thermoelectric cooling device for measuring properties complex structure, the problem of test process inconvenience, a kind of thermoelectric cooling device for measuring properties and method thereof have been proposed, for measuring electrothermal module refrigerating capacity Q under the practical application operating mode, coefficient of performance, the thermal performances such as thermoelectric figure of merit coefficient Z are measured.Device volume is small and exquisite, and cost is low, and test process and method are easy, and result is accurate.
Technical scheme of the present invention is: a kind of thermoelectric cooling device for measuring properties comprises tested thermoelectric refrigerating module, confined space, heating wire, water-filled radiator, cold junction thermopair, hot junction thermopair, data collecting instrument, digital power meter, computing machine, vacuum chamber, vacuum pump, thermoelectric refrigerating module, confined space and water-filled radiator are placed in vacuum chamber, place one section heating wire in confined space, thermoelectric refrigerating module is between the confined space as the cold junction unit and the water-filled radiator as the unit, hot junction, the cold junction thermopair is placed on confined space and thermoelectric refrigerating module surface of contact, the hot junction thermopair is placed on water-filled radiator and thermoelectric refrigerating module surface of contact, cold junction thermopair and hot junction thermopair gather cold, the working temperature in hot junction is sent data collecting instrument, digital power meter gathers respectively the operating voltage of thermoelectric refrigerating module, working current, thermoelectromotive force and power of heating wire, the data of computer receiving data Acquisition Instrument and digital power meter collection are also carried out analyzing and processing.
A kind of thermoelectric cooling performance measurement method, comprise the thermoelectric cooling device for measuring properties, specifically comprises the steps:
1) open vacuum pump, control system vacuum tightness to 10
-3below Pa;
2) the performance parameter table provided according to producer, the operating voltage of regulating tested electrothermal module, find the maximum temperature difference operating mode, and data collecting instrument gathers the cold junction work temperature by cold junction thermopair and hot junction thermopair
c 'with the hot junction work temperature
h ', digital power meter record operating voltage V now
max, working current I
maxwith thermoelectromotive force E
max, by all data input Computer Storage, calculating and demonstration;
The temperature T of the electrothermal module hot junction face that 3) basis measures
h 'with voltage V
max, Computer is calculated the Seebeck coefficient α of thermoelectric refrigerating module;
4) according to the electrothermal module operating voltage V measured
max, electric current I
maxand thermoelectromotive force value E
max, Computer is calculated the all-in resistance R of thermoelectric refrigerating module;
5) according to the electrothermal module operating voltage V measured
max, electric current I
max, thermoelectromotive force value E
maxand hot junction surface temperature T
h ', Computer is calculated the overall thermal conductance K of thermoelectric refrigerating module;
6) adjust the supply voltage of thermoelectric refrigerating module, regulate electric-heating-wire-heating power simultaneously, load a thermal load to the module cold junction, after system to be tested reaches and stablizes, data collecting instrument gathers the cold junction work temperature by cold junction thermopair and hot junction thermopair
cwith the hot junction work temperature
h, digital power meter record operating voltage V now, working current I and thermoelectromotive force E, preserve all data input computing machines, process;
7) according to calculating gained α, R, K and measuring gained I, T
h, T
c, Computer is calculated refrigerating capacity
q, the electric power of consumption
p, coefficient of performance, thermoelectric figure of merit coefficient
z, complete performance measurement;
8) measurement of electrothermal module performance under different hot-side temperatures: the cooling water temperature changed by water-filled radiator changes the thermoelectric refrigerating module hot-side temperature, repeats 1)～7) step, the performance measurement of thermoelectric refrigerating module under different hot-side temperatures completed.
Beneficial effect of the present invention is: thermoelectric cooling device for measuring properties of the present invention and method thereof, and the apparatus structure compact and reasonable, test easyly, and measuring accuracy is high.
The accompanying drawing explanation
Fig. 1 is thermoelectric cooling device for measuring properties structural representation of the present invention;
Fig. 2 is thermoelectric cooling device for measuring properties electric parameter measurement schematic diagram of the present invention.
Embodiment
Thermoelectric cooling device for measuring properties structural representation as shown in Figure 1, comprise tested thermoelectric refrigerating module 1, confined space 2, heating wire 3, water-filled radiator 4, cold junction thermopair 5, hot junction thermopair 6, data collecting instrument 7, digital power meter 8, computing machine 9, vacuum extractor, vacuum extractor comprises vacuum chamber 10 and vacuum pump 11.Thermoelectric refrigerating module 1, confined space 2 and water-filled radiator 4 are placed in vacuum chamber 10, and the cold junction unit is a confined space 2, place one section heating wire 3 in space, the simulation loading thermal load, and can be by regulating the load of electric-heating-wire-heating power analog variable; The unit, hot junction is water-filled radiator 4, is used for controlling thermoelectric refrigerating module 1 hot-side temperature; Thermoelectric refrigerating module 1 is between confined space 2 and water-filled radiator 4, and cold junction thermopair 5 is placed on confined space 2 and thermoelectric refrigerating module 1 surface of contact, and hot junction thermopair 6 is placed on water-filled radiator 4 and thermoelectric refrigerating module 1 surface of contact.
The data acquisition process unit comprises cold junction thermopair 5 and hot junction thermopair 6, data collecting instrument 7, digital power meter 8 and computing machine 9.Thermopair gathers the working temperature of cool and heat ends and send data collecting instrument 7; Digital power meter 8 gathers respectively operating voltage and the working current of thermoelectric refrigerating module 1, thermoelectromotive force, and the power of heating wire 3; Computing machine 9 receives the data of data collecting instrument 7 and digital power meter 8 collections and carries out analyzing and processing.
Vacuum extractor contains vacuum chamber 10 and vacuum pump 11, is used for control system vacuum tightness to 10
-3below Pa, therefore can ignore the impact of cross-ventilation heat exchange.
During test experiments carries out, the measuring principle of the several work electrical quantitys of thermoelectric refrigerating module 1 as shown in Figure 2.Passage 1 surveying work voltage, passage 2 surveying work electric currents, passage 3 is measured thermoelectromotive force.After test macro reaches and stablizes, record now operating voltage and current value, stir switch, cut off the power supply of thermoelectric refrigerating module 1, connect the measurement passage of thermoelectromotive force, in order to eliminate switching noise, the sampled signal obtained, the measurement of thermoelectromotive force needs an of short duration time delay (t=0.5s), so just can obtain the thermoelectromotive force value of electrothermal module.
Concrete steps and method can operate in the requsst listed below:
1) open vacuum pump 11, control system vacuum tightness to 10
-3below Pa.
2) the performance parameter table provided according to producer, the operating voltage of regulating tested electrothermal module 1, find the maximum temperature difference operating mode, utilizes cold junction thermopair 5 to measure the cold junction work temperature
c ', hot junction thermopair 6 is measured the hot junction work temperature
h ', with data collecting instrument 7 collecting temperature signal T
c 'and T
h ', utilize digital power meter 8 record operating voltage V now
max, working current I
maxwith thermoelectromotive force E
max, by 9 storages of all data input computing machines, calculating and demonstration.
The temperature T of the electrothermal module hot junction face that 3) basis measures
h 'with voltage V
max, utilize computing machine 9 to calculate the Seebeck coefficient α of electrothermal module;
4) according to the electrothermal module operating voltage V measured
max, electric current I
maxand thermoelectromotive force value E
max, utilize computing machine 9 to calculate the all-in resistance R of described electrothermal module;
5) according to the electrothermal module operating voltage V measured
max, electric current I
max, thermoelectromotive force value E
maxand hot junction surface temperature T
h ', utilize computing machine 9 to calculate the overall thermal conductance K of described electrothermal module;
6) adjust the supply voltage of electrothermal module 1, regulate heating wire 3 heating powers simultaneously, load a thermal load to the module cold junction, after system to be tested reaches and stablizes, utilize cold junction thermopair 5 to measure the cold junction work temperature
c, hot junction thermopair 6 is measured the hot junction work temperature
h, with data collecting instrument 7 collecting temperature signal T
cand T
h, utilizing digital power meter 8 record operating voltage V now, working current I and thermoelectromotive force E, preserve all data input computing machines 9, process.
7) according to calculating gained α, R, K and measuring gained I, T
h, T
c, can utilize computing machine 9 to calculate refrigerating capacity
q, the electric power of consumption
p, coefficient of performance, thermoelectric figure of merit coefficient
z, complete performance measurement
.
8) measurement of electrothermal module performance under different hot-side temperatures: the cooling water temperature changed by water-filled radiator 4 can change the thermoelectric refrigerating module hot-side temperature, repeats above-mentioned steps, thereby completes the performance measurement of thermoelectric refrigerating module under different hot-side temperatures.
Claims (2)
1. a thermoelectric cooling device for measuring properties, is characterized in that, comprises tested thermoelectric refrigerating module (1), confined space (2), heating wire (3), water-filled radiator (4), cold junction thermopair (5), hot junction thermopair (6), data collecting instrument (7), digital power meter (8), computing machine (9), vacuum chamber (10), vacuum pump (11), thermoelectric refrigerating module (1), confined space (2) and water-filled radiator (4) are placed in vacuum chamber (10), place one section heating wire (3) in confined space (2), thermoelectric refrigerating module (1) is positioned at as between the confined space (2) of cold junction unit and the water-filled radiator (4) as the unit, hot junction, cold junction thermopair (5) is placed on confined space (2) and thermoelectric refrigerating module (1) surface of contact, hot junction thermopair (6) is placed on water-filled radiator (4) and thermoelectric refrigerating module (1) surface of contact, cold junction thermopair (5) and hot junction thermopair (6) gather cold, the working temperature in hot junction is sent data collecting instrument (7), digital power meter (8) gathers respectively the operating voltage of thermoelectric refrigerating module (1), working current, thermoelectromotive force and heating wire (3) power, computing machine (9) receives the data of data collecting instrument (7) and digital power meter (8) collection and carries out analyzing and processing.
2. a thermoelectric cooling performance measurement method, comprise the thermoelectric cooling device for measuring properties, it is characterized in that, specifically comprises the steps:
1) open vacuum pump (11), control system vacuum tightness to 10
-3below Pa;
2) the performance parameter table provided according to producer, the operating voltage of regulating tested electrothermal module (1), find the maximum temperature difference operating mode, and data collecting instrument (7) gathers the cold junction work temperature by cold junction thermopair (5) and hot junction thermopair (6)
c 'with the hot junction work temperature
h ', digital power meter (8) record operating voltage V now
max, working current I
maxwith thermoelectromotive force E
max, by all data input computing machines (9) storage, calculating and demonstration;
The temperature T of the electrothermal module hot junction face that 3) basis measures
h 'with voltage V
max, computing machine (9) calculates the Seebeck coefficient α of thermoelectric refrigerating module (1);
4) according to the electrothermal module operating voltage V measured
max, electric current I
maxand thermoelectromotive force value E
max, computing machine (9) calculates the all-in resistance R of thermoelectric refrigerating module (1);
5) according to the electrothermal module operating voltage V measured
max, electric current I
max, thermoelectromotive force value E
maxand hot junction surface temperature T
h ', computing machine (9) calculates the overall thermal conductance K of thermoelectric refrigerating module (1);
6) adjust the supply voltage of thermoelectric refrigerating module (1), regulate heating wire (3) heating power simultaneously, load a thermal load to the module cold junction, after system to be tested reaches and stablizes, data collecting instrument (7) gathers the cold junction work temperature by cold junction thermopair (5) and hot junction thermopair (6)
cwith the hot junction work temperature
h, digital power meter (8) record operating voltage V now, working current I and thermoelectromotive force E, preserve all data input computing machines (9), process;
7) according to calculating gained α, R, K and measuring gained I, T
h, T
c, computing machine (9) calculates refrigerating capacity
q, the electric power of consumption
p, coefficient of performance, thermoelectric figure of merit coefficient
z, complete performance measurement;
8) measurement of electrothermal module performance under different hot-side temperatures: the cooling water temperature changed by water-filled radiator (4) changes the thermoelectric refrigerating module hot-side temperature, repeats 1)～7) step, the performance measurement of thermoelectric refrigerating module under different hot-side temperatures completed.
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| CN103323284B CN103323284B (en) | 2015-09-30 |
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Cited By (7)
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| CN105807171A (en) * | 2016-05-26 | 2016-07-27 | 安徽工业大学 | Simulation detecting system and method of heat to electricity conversion efficiency of industrial waste heat |
| CN105929280A (en) * | 2016-05-26 | 2016-09-07 | 安徽工业大学 | Closed type simulation detection system and detection method of industrial thermal radiation thermoelectric conversion efficiency |
| CN110456250A (en) * | 2019-09-16 | 2019-11-15 | 中国科学技术大学 | A kind of measurement method and measuring device of TEC refrigeration performance |
| CN111964935A (en) * | 2020-08-21 | 2020-11-20 | 中国工程物理研究院材料研究所 | Thermoelectric device performance testing device |
| CN112345582A (en) * | 2020-11-05 | 2021-02-09 | 福州大学至诚学院 | Semiconductor refrigerating sheet performance parameter testing method |
| CN113589072A (en) * | 2021-07-14 | 2021-11-02 | 中国科学院电工研究所 | Thermoelectric device testing system and method |
| CN118466634A (en) * | 2024-07-10 | 2024-08-09 | 中国人民解放军国防科技大学 | Multifunctional temperature control device based on semiconductor refrigerating sheet |
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2013
- 2013-07-08 CN CN201310284365.7A patent/CN103323284B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807171A (en) * | 2016-05-26 | 2016-07-27 | 安徽工业大学 | Simulation detecting system and method of heat to electricity conversion efficiency of industrial waste heat |
| CN105929280A (en) * | 2016-05-26 | 2016-09-07 | 安徽工业大学 | Closed type simulation detection system and detection method of industrial thermal radiation thermoelectric conversion efficiency |
| CN105807171B (en) * | 2016-05-26 | 2019-05-07 | 安徽工业大学 | A kind of simulation detection system and detection method of industrial exhaust heat thermoelectric conversion efficiency |
| CN110456250A (en) * | 2019-09-16 | 2019-11-15 | 中国科学技术大学 | A kind of measurement method and measuring device of TEC refrigeration performance |
| CN110456250B (en) * | 2019-09-16 | 2024-05-17 | 中国科学技术大学 | TEC refrigerating performance measuring method and measuring device |
| CN111964935A (en) * | 2020-08-21 | 2020-11-20 | 中国工程物理研究院材料研究所 | Thermoelectric device performance testing device |
| CN112345582A (en) * | 2020-11-05 | 2021-02-09 | 福州大学至诚学院 | Semiconductor refrigerating sheet performance parameter testing method |
| CN112345582B (en) * | 2020-11-05 | 2024-05-28 | 福州大学至诚学院 | Method for testing performance parameters of semiconductor refrigeration sheet |
| CN113589072A (en) * | 2021-07-14 | 2021-11-02 | 中国科学院电工研究所 | Thermoelectric device testing system and method |
| CN113589072B (en) * | 2021-07-14 | 2022-06-03 | 中国科学院电工研究所 | Thermoelectric device testing system and method |
| CN118466634A (en) * | 2024-07-10 | 2024-08-09 | 中国人民解放军国防科技大学 | Multifunctional temperature control device based on semiconductor refrigerating sheet |
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