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다공질 폴리우레탄 폼 매트릭스 축류 회전형 열교환기의 성능특성에 관한 실험적 연구
태춘섭,박상동,조성환,최영돈,Tae, C.S.,Park, S.D.,Cho, S.H.,Choi, Y.D. 대한설비공학회 1993 설비공학 논문집 Vol.5 No.1
This is an experimental study to identify the performance of air-to-air rotary heat exchanger with polyurethane foam matrix. The experimental apparatus including heating AHU(Air Handling Unit), cooling AHU, sensor chamber, and heat exchanger testing unit was designed and manufactured in this study. The performance of heat exchanger with porous polyurethane foam matrix was tested with variations of the density and the thickness of matrix, regulating the wind velocity and the rotational speed of matrix. The actual heat recovery effectiveness, air leakage rate, and pressure drop of heat exchanger were measured and analyzed.
태춘섭,이충구,조성환 충북대학교 산업과학기술연구소 2002 산업과학기술연구 논문집 Vol.16 No.1
In our country, radiant floor heating systems are widely used for space heating in residences. The application of outdoor air temperature prediction suboptimal control for the continuous and intermittent radiant floor heating systems was investigated by computer simulation and experiment. For this study, TRNSYS program was used and an experimental facility consisting of two rooms (3×4.4×2.8m) identical in construction was built. The facility enabled simultaneous comparison of two different control strategies which implemented in a separate room under same outdoor conditions. For the continuous heating system, existing outdoor reset control and new prediction control are applied and then the room air temperature variation and energy consumption were investigated. For the intermittent heating system, existing control strategy which supplies heat source according to minimum outdoor air temperature and new prediction control which supplies heat source from the result of heating load calculation using the weather bureau prediction data are applied. Then the room air temperature variation and energy consumption were investigated. Results showed that outdoor air temperature prediction control was superior to the conventional control for radiant floor heating system operated in the continuous and intermittent heating mode. New control strategy resulted in good thermal environment and less energy consumption.