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Justification of the resulting comfortable temperature parameter

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Heating, ventilation, and air conditioning professionals use thermal comfort indices to measure and compare thermal conditions. In this paper, indices of thermal comfort frequently used are given, and the parameter of the resulting temperature is refined using matrices of isocomfortable parameters which developed as a result of solving the problem of ensuring a given level of thermal comfort in accordance with the method proposed by P.O. Fanger and standardized in the ISO 7730 standard. The weight coefficients proposed by 30494-2011 State Standard were tested using the matrices of isocomfortable parameters. This article provides comparative tables and graphs, whcih prove that the weighting factors proposed by the international standard are not accurate enough. Based on the physical meaning of the parameter of the resulting temperature it was assumed that, for each value of air mobility, the same values of the resulting comfortable temperature were supposed to obtain. During the analysis of the data obtained, it was revealed that the standard deviation of the resulting comfortable temperature is a value of up to 0.5 ° C. This fact proves that more accurate weighting factors should be used to obtain more accurate comfort temperature results. As a result of the study, a new mathematical dependence was proposed and a new concept of the resulting comfortable temperature was introduced. The obtained mathematical dependence allows high accuracy in calculating the resulting comfortable temperature taking into account the comfortable combination of such parameters as air temperature and average radiation temperature, depending on the amount of air velocity in the room.

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