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삼각 공기 유로를 갖는 판형 열회수 환기장치의 열교환 효율
황호종(Hojong Hwang),정현종(Hyun-Jong Chung),장경진(Kyung-Jin Jang),한화택(Hwataik Han) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
The heat recovery ventilator is used to reduce the energy for building ventilation by recovering energy from the exhaust air. In this paper the counter-flow air-to-air plate-type heat exchanger is selected for the performance simulation. The heat exchanger element is composed of a lot of air channels in triangular shape. The propose of this paper is to compare the difference in thermal performance of four different layouts of the airflow channels and three different materials of the heat transfer element. The temperature efficiency and pressure drop of the heat exchanger element are simulated numerically for a various airflow rates. The results show that the efficiency increases as the number of heat transfer surfaces of the triangle increases, and that the horizontal plate installed in the middle of the channel effects the efficiency and pressure loss of the heat exchanger.
Haolia Rahman,Hwang Hojong(황호종),Bong Seong Hyeok(봉성혁),Kyung-Jin Jang(장경진),Hwataik Han(한화택) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
The accuracy of reading sensor depends on the operation range and the reliability level of sensor; therefore, uncertainty cannot be avoided. This study is proposed to assess the uncertainty of a CO₂ reading sensor during estimating the occupancy distribution in office multi-room buildings. Bayesian Markov Chain Monte Carlo approach used to calculate the occupancy in the individual space based on CO₂ information. CONTAM was used to generate CO₂ concentration from given information of occupancy schedule, building model and ventilation rate in each room. Noise levels were added into CO₂ data to investigate an acceptable uncertainty in the occupancy estimation.