全工况下板翅式空气全热交换器芯体换热效率研究
Heat exchange efficiency of cores of plate-fin air total heat exchangers under all working conditions
摘要：
通过焓差室对常规板翅式空气全热交换器芯体进行了实验研究，分析了室内外温差、含湿量差和芯体迎面风速对芯体换热效率的影响。拟合了显热效率和潜热效率的经验计算公式，利用所得经验公式计算了上海典型气象年动态效率下的逐时全热回收量，得到全热交换器芯体夏季平均焓效率为44.6%，冬季平均焓效率为71.0%，可见冬季排风全热回收对节能极为重要。
Abstract：
An experimental study on the core of the conventional plate-fin air total heat exchanger is carried out through an enthalpy difference chamber, and the effects of different indoor and outdoor temperature difference, moisture difference and core face-to-face wind speed on the core heat exchange efficiency are analysed. The empirical calculation formulas of sensible heat exchange efficiency and latent heat exchange efficiency are fitted. The hourly total heat recovery under the dynamic efficiency of Shanghai’s typical meteorological year is calculated by using the obtained empirical formulas, and the average enthalpy efficiency of the total heat exchange core is 44.6% in summer, and 71.0% in winter. It can be found that the total heat recovery of the exhaust air in winter is very important for energy saving.
Keywords:air total heat exchanger; core; heat exchange efficiency; sensible heat; latent heat; total heat recovery; enthalpy efficiency; wind speed