Indoor mean radiation temperature determination method and device

Abstract

The invention discloses an indoor mean radiation temperature determination method and device. The method comprises steps that firstly, heat exchange relations between a cold radiation ceiling surface and each indoor space surface in a cold radiation central air conditioner system according to the radiation heat exchange principle, secondly, surface temperature of multiple measurement positions of the radiation surface, power supply temperature, backwater temperature and water flow of refrigerated water at a tail end of a central air conditioner system cold radiation ceiling are measured, and lastly, a total external radiation heat exchange amount of the cold radiation ceiling and the total capillary convection heat exchange amount are made to be equal according to the law of energy conservation, and the indoor mean radiating temperature is calculated. The method is advantaged in that compared with a traditional determination method employing a black-bulb thermometer, the indoor mean radiating temperature can be rapidly and conveniently calculated through employing a micro processor, an infrared detector and a multifunctional flowmeter without additionally-arranged hardware, operation is simple and convenient, and high accuracy is realized.

Description

technical field [0001] The invention relates to the technical field of indoor environment measurement, in particular to a method and device for measuring indoor average radiation temperature. Background technique [0002] In the field of central air conditioning, the thermal comfort of end users is usually one of the important indicators used to evaluate whether the functions of the central air conditioning system are effectively realized. The so-called thermal comfort of the human body refers to the subjective and objective evaluation of the human body's satisfaction with the hot and humid environment. Thermal and humid environmental parameters include air temperature, air velocity, relative humidity of the air and average radiant temperature; human parameters include clothing thermal resistance and labor intensity. The research on human thermal comfort involves building thermal physics, physiology of human thermal regulation mechanism and human psychology and other discip...

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Problems solved by technology

[0003] At the same time, a large number of foreign studies have shown that indoor air quality is also related to the thermal environment: 1) air temperature, humidity and wind speed will affect the emission of indoor pollutants; 2) the feeling of pollutants is related to temperature. When the chemical composition remains the same, lowering the temperature will make people feel more comfortable, and the rate of dissatisfaction with the air quality will also decrease

[0004] In order to obtain a comfortable thermal environment, countries consume a large amount of energy for heating and air conditioning every year. Due to the lack of a correct understanding of thermal comfort, it often results in excessive heating or cooling of buildings, which not only causes discomfort to the human body, It also wastes a lot of energy

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