| Abstract | This study aimed to experimentally explore the seasonal operational performance and energy efficiency of a vacuum-based membrane dehumidification and evaporative cooling assisted dedicated outdoor air system (VMD-IEC assisted DOAS). A prototype of VMD-IEC assisted DOAS was designed and constructed based on the previous studies relevant to the vacuum-based membrane dehumidifier. In addition, the operating modes for the proposed DOAS were establihsed based on the outdoor air conditions, and the performance of the proposed system for each operation mode were experimentally examined. From the test data, one can observe that the proposed DOAS could 1.76 kW, and 0.51 kW of the cooling capacity in the operation mode 1 and 2, respectively. Additionally, the part load operation is available from the VMD by controlling the number of operating vacuum pump, thus it could alleviate the decline in energy efficiency of the proposed DOAS when operated in the mode 2. |
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