The purpose of this study is to investigate the effect of heat recovery system by redirecting the exhaust air through a mechanism device in a hot air dryer.

• 试验结果显示热能回收装置可将进气温度从大气温度（约32℃）提升到42℃，以温度为基准的效能评估，研制的的热能回收效能可达65%25以上。