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A heat flow rate measuring instrument and measuring method

A heat flow rate, measuring instrument technology, applied in the direction of material thermal development, can solve problems such as poor heat flow rate measurement accuracy, and achieve the effects of improving measurement accuracy, avoiding adverse effects, and reducing interference

Active Publication Date: 2018-02-13
CHINA AGRI UNIV
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Problems solved by technology

[0005] The invention provides a heat flow rate measuring instrument and a measuring method, which can solve the problem of poor heat flow rate measurement accuracy in the prior art

Method used

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  • A heat flow rate measuring instrument and measuring method
  • A heat flow rate measuring instrument and measuring method
  • A heat flow rate measuring instrument and measuring method

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Experimental program
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Embodiment 1

[0102] Under the same conditions, the measurement results of the heat flow rate measuring instrument and measurement method of the present invention are compared with the measurement results of the thermal resistance type heat flow plate of the prior art to measure the heat flow rate. Figure 5 shown.

[0103] The result shows that adopting the heat flow rate measuring instrument and measuring method of the present invention to measure the measurement result of heat flow rate is consistent with the measurement result trend of adopting the thermal resistance type heat flow plate in the prior art to measure heat flow rate; The heat flow rate value measured by the resistive heat flow plate is large, this is because the sensor of the present invention has very little shading to the ground surface, resulting in little interference with solar radiation heat storage, and the test results are more realistic; and the soil heat release process at night, due to The heat flow rate measuri...

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Abstract

The invention relates to a heat flow rate measuring instrument and measuring method, in particular to a heat flow rate measuring instrument and measuring method for a bulk material. The measuring instrument comprises a heat source, multiple temperature sensors, a temperature controller (12) and a signal processor (11). The temperature controller (12) is connected with a heating rod (1) of the heat source; the signal processor (11) is connected with the multiple temperature sensors and further connected with the heating rod (1) of the heat source. The measuring method comprises the following steps of measuring instrument arrangement, reading configuration, parameter setting, data acquisition, heat conductivity calculation, preparation of heat flow rate measurement, heat flow rate data acquisition and heat flow rate calculation. According to the heat flow rate measuring instrument and measuring method, the heat conductivity of a detected medium is measured at the site, the heat flow rate is measured according to the heat conductivity and temperatures of the two temperature sensors, the site is rarely interfered, sensitivity is high, a heat flow channel is not blocked, and measurement sensitivity and precision are greatly improved.

Description

technical field [0001] The invention relates to a heat flow rate measuring instrument and a measuring method, in particular to a bulk material heat flow rate measuring instrument and a measuring method. Background technique [0002] Heat flow rate is an intensity physical quantity that characterizes heat transfer, and the corresponding quantitative detection instrument is a heat flow meter. At present, the most widely used thermal resistance surface heat flow meter adopts the principle of thermopile. An additional wall with known thermal conductivity is added to the surface to be measured, and the temperature difference between the inside and outside of the additional wall is measured, which is calculated from the heat flux density equation. Through the heat flow of the additional wall, this method is likely to cause interference to the actual condition of the surface to be measured, resulting in large errors in measurement. [0003] Heat flow meters that measure surface he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 袁小艳桂心哲高明赵淑梅王建平李桂朋
Owner CHINA AGRI UNIV
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