摘要
以板式全热交换器为例,通过推导全热交换器的显热、潜热和全热3种效率之间的关系式,用权重系数的概念分析了在我国不同地区气象条件下,显热效率和潜热效率对全热效率的影响程度.分析表明,夏季工况下我国大部分地区的潜热效率的权重系数大于显热效率的权重系数.如果使用全热交换器,其全热效率的大小在夏季工况下主要受其潜热效率大小的影响,而冬季工况下则主要受到显热效率的影响,由于不同气候条件的潜热和显热所占权重比例不同,在进行不同材质的全热交换器的研发和选用时,应充分考虑其显热效率、潜热效率对全年能耗的总体影响,达到更好地实现节约投资和节能的目的.
By analyzing an example of plate total heat exchanger, the relational expressions of total heat efficiency, sensible heat efficiency and latent efficiency for the total heat exchanger were deduced with weight coefficient method. The influences of sensible heat efficiency and latent efficiency on total heat efficiency in different climatic areas of China were determined according to weight coefficients of sensible heat efficiency and latent heat efficiency, showing that the weight coefficient of latent heat efficiency is bigger than that of sensible heat efficiency under the summer air-conditioning condition. The total heat efficiency of the total heat exchanger was mainly influenced by the latent heat efficiency under summer condition in most areas of China, while by sensible heat efficiency in winter. As a result the weight coefficients of the sensible and latent heat efficiency are different in different climatic areas, and the effects of the sensible and latent efficiency on the all-year energy consumption, should be taken in to account in order to save cost and energy.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第8期943-947,共5页
Journal of Tianjin University(Science and Technology)
关键词
全热交换器
全热效率
显热效率
潜热效率
权重系数
节能
total heat exchanger
total heat efficiency
sensible heat efficiency
latent heat efficiency
weight coefficient
energy saving
