办公建筑电子类设备对流与辐射散热特性及电热转换监测模型研究
Study on convective and radiative heat dissipation characteristics and power-heat conversion monitoring model of electronic equipment in office buildings
摘要：
精准量化以计算机为代表的电子类设备的对流与辐射散热特性,对于预测办公建筑逐时冷负荷、高效调控暖通空调系统具有重要意义。本文采用理论与试验相结合的方法,提出了计算机类设备对流与辐射散热量与电功率之间的电热转换传递函数模型,搭建了试验方舱,基于试验数据研究得到设备工作、非工作工况下的分项散热动态特性。利用降阶分析方法将传递函数模型由7阶降为3阶,提高了模型应用性,并基于相同及不同类型设备的试验数据验证了模型精度。结果表明,设备对流与辐射散热量电热转换传递函数模型计算结果的平均绝对百分比误差不大于6.25%。
Abstract：
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%.
Keywords:office building; convective and radiative heat dissipation characteristic; electronic equipment; computer; power-heat conversion model; electric power; HVAC system