在電信箱、電池箱或是電力控制箱中，一般多使用空氣對空氣熱 交換器，將內部空氣與外部空氣隔離分別循環而進行熱交換，以避免 外氣直接進入。前述之空氣對空氣熱交換器，多使用薄鋁片堆疊而成， 將內外側空氣分別通於各鋁片兩側，透過鋁片傳遞熱量。本研究以實 驗方法探討空氣對空氣在塑膠板式熱交換器之熱傳壓降性能。兩種塑 膠板式熱交換器分別為山型紋角度65 及主要山型紋角度為30 度、兩 側入口角度為65 度之板式熱交換器。由實驗結果可得知，山型紋流 道型式能有效提高熱傳。混合角度30+65 山型紋板片的熱傳較鋁板片 高，同時壓降也略高，但混和角度之板片相較於65 度山型紋板片確 實能有效降低壓降。 ;Air-to-air heat exchanger is generally used in the telecom equipment cabinet to divide the outside and inside air streams and exchange heat between these two air streams. Thin aluminium plates with ripple surface and protrusion are commonly used in these kinds of heat exchangers. This study provides a heat transfer enhancement design and experimental analysis of thin plastic air-to-air heat exchangers. Two plastic plate heat exchangers, one with 65o chevron angle and the other with chevron angle of 30o in the main stream and 65o in the inlet and exit passages was designed and tested. From the experimental results, we found that the chevron flow passage is able to significantly enhance the heat exchangers’ heat transfer performance. The 30o+65o chevron heat exchanger provides a lower pressure drop but higher heat transfer performance than other two heat exchangers. It is the optimal design for air-to-air heat transfer in the range tested.
