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Tong Yijie(동역걸),Honghyun Cho(조홍현) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.6
In this paper, based on the energy balance for the evacuated tube solar collector with heat pipe, the thermal performance was investigated by analytical method. The simulation method was developed and was compared to the experiment results under different operating conditions such as different ambient temperature and the change of weather. The thermal performance of collector showed about 0-6% discrepancy because of some simple assumptions in the simulation and the unavoidable human factors. The result showed the efficiency changes rapidly during the poor radiation and low ambient temperature conditions, while relatively steady in the high radiation situations.
Analysis of Solar Collector Efficiency and Annual Energy with Installation Tilt Angle
Tong Yijie(동역걸),Kim Jinhyun(김진현),Honghyun Cho(조홍현) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.6
In this paper, an analytical model of an evacuated heat pipe solar collector was developed and analyzed with different angles and operating conditions. We can compare the three kinds of title angles by determining the temperature of outlet of the solar collector in the same operating conditions while the inlet temperature and ambient temperature is also the same. As a result, the efficiency of tilt-angles was found to be in the range 0%-70%, and the annual average radiation collected by different tilt angles is also calculated, for thewinter season the relatively large distinguish is considered. In addition, the desired angle of solar collector was shown in 45 degree.
태양열 집열기 모델링을 활용한 발전용 R134a 랭킨사이클의 성능해석
정진환(Jinhwan Joung),강변(Byun Kang),동역걸(Tong Yijie),조홍현(Honghyun Cho) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.3
As the environmental regulations is more strengthened, the study of the renewable energy system and waste heat for electricity production is being accelerated. In this study, the performance and power generation rate of solar power generation by using R134a Rankine cycle was analyzed with solar radiation and mass flow rate of R134a. As a result, the maximum and minimum collected heat of solar collector was 20.4 kW and 13.6 kW at October and December, respectively. Besides, the highest generator power was generated at October and it was 0.91 kW/day, while the lowest generator power is occurred at December and it was about 0.85 kW/day.