全工況下板翅式空氣全熱交換器芯體換熱效率研究
Heat exchange efficiency of cores of plate-fin air total heat exchangers under all working conditions
摘要：
通過焓差室對常規板翅式空氣全熱交換器芯體進行了實驗研究，分析了室內外溫差、含濕量差和芯體迎面風速對芯體換熱效率的影響。擬合了顯熱效率和潛熱效率的經驗計算公式，利用所得經驗公式計算了上海典型氣象年動態效率下的逐時全熱回收量，得到全熱交換器芯體夏季平均焓效率為44.6%，冬季平均焓效率為71.0%，可見冬季排風全熱回收對節能極為重要。
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:airtotalheatexchanger;core;heatexchangeefficiency;sensibleheat;latentheat;totalheatrecovery;enthalpyefficiency;windspeed