Conditions for the use of infrared camera diagnostics in energy auditing of the objects exposed to open air space at isothermal sky

Archives of Thermodynamics

Tadeusz KruczekCorresponding authorSilesian University of Technology, Institute of Thermal Technology Konarskiego 22, 44-100 Gliwice, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Silesian University of Technology, Institute of Thermal Technology Konarskiego 22, 44-100 Gliwice, Poland

关键词: Keywords: Thermovision diagnostics;    Infrared camera;    Radiative ambient temperature;    Open air space;   

DOI  :  10.1515/aoter-2015-0005

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

Convective and radiation heat transfer take place between various objects placed in open air space and their surroundings. These phenomena bring about heat losses from pipelines, building walls, roofs and other objects. One of the main tasks in energy auditing is the reduction of excessive heat losses. In the case of a low sky temperature, the radiation heat exchange is very intensive and the temperature of the top part of the horizontal pipelines or walls is lower than the temperature of their bottom parts. Quite often this temperature is also lower than the temperature of the surrounding atmospheric air. In the case of overhead heat pipelines placed in open air space, it is the ground and sky that constitute the surroundings. The aforementioned elements of surroundings usually have different values of temperature. Thus, these circumstances bring about difficulties during infrared inspections because only one ambient temperature which represents radiation of all surrounding elements must be known during the thermovision measurements. This work is aimed at the development of a method for determination of an equivalent ambient temperature representing the thermal radiation of the surrounding elements of the object under consideration placed in open air space, which could be applied at a fairly uniform temperature of the sky during the thermovision measurements as well as for the calculation of radiative heat losses.

【 授权许可】

Unknown