Study on convective and radiative heat dissipation characteristics and power-heat conversion monitoring model of electronic equipment in office buildings

Accurately quantifying the convective and radiative heat dissipation characteristics of electronic equipment represented by computers is of great significance for predicting hourly cooling loads of office buildings and efficiently regulating HVAC systems. In this paper, a method combining theory and experiment is used, and a power-heat conversion transfer function model for describing convective and radiative heat dissipation and electric power of computers is presented. An experimental cabin is built. Based on the experimental data, the dynamic characteristics of different kinds of heat dissipation are obtained under the working and non-working conditions of the equipment. An order depression method is utilized to reduce the order of the transfer function model from 7 to 3 to improve the applicability of the model. The accuracy of the model is verified based on experimental data of the same and different types of equipment. The results show that the mean absolute percentage error of the calculation results of the power-heat conversion transfer function model for the convective and radiant heat dissipation of equipment is not more than 6.25%.