空气-水空调系统末端设备承担负荷分析计算

Load analysis and calculation of terminal equipment in air-water air-conditioning system

空气-水空调系统的室内负荷由新风与末端设备共同承担,经新风机组处理后的送入新风状态不同,新风会承担室内不同类型的负荷,末端设备负荷,为室内负荷与新风承担负荷之差。风机盘管是空气-水系统应用最普遍的一种末端设备,以风机盘管加新风系统为例,分析计算新风承担室内负荷显热冷负荷和潜热冷负荷,确定风机盘管承担负荷的显热冷负荷和潜热冷负荷。同时分析了空气-水空调系统的另外一种形式-温湿度独立控制系统。新风采用不同除湿方法,末端设备负荷大小不同,由于冷热源种类较多,所需冷热媒的温度不同,建议通过技术经济分析确定最优方案。

The indoor load of air-water air-conditioning system is shared by fresh air and terminal equipment,the status of the incoming fresh air is different,and it will undertake different types of indoor load.Terminal equipment load is the difference between indoor load and fresh air load.Fan-coil unit is one of the most common terminal equipment in airwater system.This paper takes the fan coil plus fresh air system as an example,analyzes and calculates the sensible cooling load and latent cooling load undertaken by the fresh air,determines the sensible cooling load and latent cooling load of the load borne by the fan coil,so that the selected fan coil can meet the design requirements.This paper also analyzes another form of air-water air conditioning system,names temperature and humidity independent control system.Different dehumidification methods are adopted for fresh air according to the terminal equipment loads,and temperature of required cold and heat medium varies with types of cold and heat sources.Therefore,the optimal scheme should be determined through technical and economic analysis.