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Variable thermal resistance compensation thermal resistance test method

A compensation type, thermal resistance technology, applied in the field of thermophysical parameter testing, to achieve the effect of large adjustment range, short test time and high test accuracy

Inactive Publication Date: 2019-08-23
QINGDAO UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of the existing thermal resistance steady-state testing technology, and provide a method for thermal resistance testing using a variable thermal resistance compensation method

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Embodiment Construction

[0020] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings, and the content of the present invention will be illustrated by means of the following examples, rather than limiting the scope of the present invention.

[0021] The on-site detection of the thermal resistance of the building envelope provides a reliable basis for evaluating the energy-saving effect of the building, determining the air-conditioning load of the entire space, thermal comfort design, energy-saving design, and air-conditioning system selection. Applying the present invention can carry out the thermal resistance test of building maintenance structure, and the measured object is the wall body of building enclosure structure at this moment, such as figure 1 As shown, the variable thermal resistance compensation thermal resistance test system includes a temperature-controllable heat sink 1, a variable thermal resistance module 2, a he...

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Abstract

The invention provides a thermal resistance test system, which includes a temperature-controllable heat sink, a thermal-resistance-varying module, a heat flow sensor, a temperature sensor, and a signal processing and control unit. The system performs a thermal resistance test through a thermal-resistance-varying compensation method; during work, the thermal-resistance-varying module can compensate the system with a heat flow, which is symmetric to a to-be-tested object on the basis of the heat flow sensor, so that heat flow output of the heat flow sensor is zero; and as a result, the thermal resistance value of the to-be-tested object is equal to that of the thermal-resistance-varying module. The compensation method can reduce and eliminate interference and test error, wherein the thermal-resistance-varying module can adapt with different to-be-tested objects having different thermal resistance values by pre-calibrating the varying rule of thermal resistance. The thermal resistance test method and the thermal-resistance-varying compensation method has excellent environment adaptability, short measurement time, high measurement precision and stability and low detection cost, is convenient to install and use on site, and greatly develops the application field of steady-state thermal resistance test methods.

Description

technical field [0001] The invention relates to a thermal resistance testing method, in particular to a thermal resistance testing method of a variable thermal resistance compensation method. It belongs to the field of thermophysical parameter testing. Background technique [0002] There are two parameters that represent the thermal conductivity of a material: thermal conductivity and thermal resistance. Among them, thermal conductivity is used to express the thermal conductivity of a certain material, and thermal resistance is used to express the thermal conductivity of an object. [0003] The thermal resistance steady-state test method based on the thermal resistance principle formula uses the corresponding relationship between temperature difference and heat flow. Due to many environmental interference factors, it is difficult to achieve thermal balance, and there are limitations in industrial applications. [0004] The compensation measurement method is a measurement m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
Inventor 郑艺华刘君
Owner QINGDAO UNIV
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