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김내현(Nae-Hyun Kim),조진표(Jin-Pyo-Cho),송길섭(Gil-Sup Song),김동훈(Dong-Hoon Kim) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.8
The effects of paper properties such as density, air permeability, water vapor transmission rate on the thermal performance of plate-type enthalpy exchanger were experimentally investigated. Papers having different properties were made from the same pulp by calendering or refining. Enthalpy exchanger samples were made from the papers, and were tested according to the standard test procedure (KS B 6879). Effective efficiencies were obtained, which accounted for the air leakage between supply and exhaust streams. Results showed that paper density affected the sensible heat transfer of the samples. Sensible heat transfer increased with density of the paper. It was also shown that effective efficiency of latent heat transfer was approximately the same independent of the samples, which suggests that papers made of the same pulp show similar water vapor transmission characteristics independent of the degree of calendering or refining. Best performance was obtained for the sample having highest paper density and moderate water vapor transmission ratio.
최용민(Yong-Min Choi),김내현(Nae-Hyun Kim),송길섭(Gil-sup Song),이을종(Eul-Jong Lee),조진표(Jin-Pyo Cho) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Performance of the small slush maker operating with R-290 was experimentally investigated. The slush maker had two evaporators. At standard outdoor condition(32℃, 65% RH), the optimum refrigerant charge was obtained to be 100g. The time required for slush making was 64 minutes, power consumption was 0.89㎾ and the compressor ON/OFF ratio after slush formation was 59%. Test was also conducted at severe outdoor conditions(-10℃∼43℃, 65% RH). The slush was formed at all conditions.