| Summary: | 碩士 === 國立臺北科技大學 === 冷凍與低溫科技研究所 === 90 === Indoor comfort requirements often involve strong ventilation in buildings, but they conflict with the necessity to limit energy and economic costs connected with supply air handing. From the energy point of view, these must be improved to prevent unnecessary wasted electricity. Heat exchangers are being widely used for energy recovery in buildings. In addition to recovering heat from the return air in winter for preheating the fresh air, the return air can be evaporatively cooled and utilized for precooling the fresh air in summer. Heat exchanger made of two-phase closed thermosyphons are one of the most effective pieces of equipment for waste heat recovery.
This research is to investigate the thermal performance of an innovative equipment called “nature air conditioner”. This nature air conditioner constitutes of water sprayer, heat pipe heat exchanger and fin-tube heat exchanger. In order to reduce the outdoor air cooling load to the minimal extend., experiments and computer simulations were performed with changing various parameters such as outdoor air dry bulb temperature, outdoor air relative humidity, room air dry bulb temperature, room air relative humidity, and supply water temperature. The experimental results show that outdoor air cooling load decrease 20.56 kJ/kg of air, and the results of numerical model agree well with the experimental data. The detailed design and performance of this nature air conditioner as well as its thermal recovery system are described and discussed.
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