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Study of carbon fiber composite-based heat exchanger for icing and de-icing
Saleem Abbas(살림아바스),노세현,김병련,Phuong Nguyen Thanh(응웬탄푸옹),Chan Woo Park(박찬우) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
When heat pumps are utilized in severely cold weather, frost accumulates on the external evaporator fins, reducing thermal efficiency significantly. Carbon fiber reinforced polymer composite can be used as evaporator fins because of their efficient material features and heat resistivity nature. Using resistive heating characteristics, the thermal efficiency of a heat exchanger unit based on CFRP fins was examined.
A performance comparison of transport membrane condenser with different membrane shape and material
Van Cong Le(레반콩),Jun Cong Ge(갈준총),Thanh Phuong Nguyen(응웬탄푸옹),Thi Nhan Nguyen(응웬티난),Song Ju Hong(홍성주),Chan Woo Park(박잔우) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Flue gas from boiler contains a large amount of heat loss and wastewater. Recovery of heat and vapor is highly expected to enhance boiler efficiency and reduce its consumption. Based on the sensible heat and latent heat of vapor in the hot flue gas, membrane condenser can achieve high recover efficiencies by a proper membrane. In this study, the humidity gas was used as artificial flue gas while cooling water contribute to the condensation and transport of vapor. Different membranes were applied when membrane area and operating conditions were kept similar. The performance of plate type and circular type ceramic membrane were compared together. In order to enhance the recovery efficiency of condenser, membrane surface was modified by different methods and materials to obtain the optimal membrane properties. Furthermore, the self-made membrane substrate was developed to compare with the commercially available membrane.