变水温工况下室内空调末端供热能力分析

Analysis of Terminal Heating Capacity of Indoor Air Conditioner Under Variable Water Temperature Condition

对室内空调末端供热能力进行研究,得出空调在不同条件下的冷热源选型依据,避免出现室内空调供热富余或不足的情况。论文对室内空调末端供热能力现有资料进行解读,应用实例研究法,选取室内空调风机盘管为例展开针对性分析。搭建了物理模型,用于分析变流量与定流量工况下的室内空调末端供热能力,结合传热系数等要素,得出空调在不同工况下的室内热负荷。分析可知,在30~45℃水温范围内,空调末端在定流量工况与变流量工况下的最大冷热负荷区间分别为32%~89%和15%~88%。

To study the terminal heating capacity of indoor air-conditioning,and obtain the basis for selecting cold and heat sources of air-conditioning under different conditions,so as to avoid the situation of surplus or shortage of indoor air-conditioning heating.This paper interprets the existing data of terminal heating capacity of indoor air-conditioning,and using the method of case study,the paper takes the fan coil unit of indoor air conditioner as an example to carry out targeted analysis.A physical model was built to analyze the terminal heating capacity of indoor air conditioners under variable and constant flow conditions.Combined with heat transfer coefficient and other factors,the indoor heat load of air conditioners under different conditions was obtained.The result shows that in the water temperature range of 30~45℃,the maximum cooling and heating load range of air-conditioning terminal under constant and variable flow conditions is 32%~89%and 15%~88%,respectively.