适用于近零能耗建筑的一种自然换热空调末端的除湿能力研究

Study on the Dehumidification Capacity of a Natural Heat Transfer Air-Conditioning Terminal Device for Nearly Zero Energy Buildings

针对近零能耗建筑的低冷热负荷与室内高热舒适度的特点,笔者提出一种自然换热空调末端设备,能够实现冬季供暖和夏季供冷与除湿,并且没有强制对流换热,也无噪音,非常有利于形成室内舒适的空气环境;该空调末端的除湿性能是其与辐射末端(同样可以冷热兼供)相比的突出优势,因此,本文对该自然换热空调末端除湿能力的量化计算展开研究。经理论分析与推导,并结合空调末端的实际应用条件,最终得到适用于该空调末端凝结水量计算的半经验数学模型,同时利用实测数据对该模型进行了验证。为便于工程应用,进一步给出了常见空调室内空气参数条件下,单位设备表面积凝结水量计算的诺莫图。

In consideration of the lowered heating and cooling loads and high indoor thermal comfort of nearly zero energy buildings( n ZEB),a natural heat transfer air-conditioning terminal device( NHTACTD) was presented by the authors.The terminal device is able to supply heating in winter and undertake cooling and dehumidification in summer without forced convection heat transfer or noise,beneficial for creating comfortable indoor environment.The dehumidification capacity of the air-conditioning terminal constitutes an outstanding advantage compared with radiant heating nd cooling panels( which can also provide both heating and cooling),therefore we conducted study on the quantitative calculation of its dehumidification capacity.Through theoretical analysis and derivation,and combining the actual operation conditions of the terminal device,we created a semi-empirical mathematical calculation model applicable for the calculation of dehumidification capacity of this terminal device and verified this model using observed data.In addition,this paper provided nomograph for the calculation of condensation water volume per device surface area under the common indoor air conditions for the convenience of engineering application.