서지주요정보
상변화 물질을 이용한 태양열 집열기 성능에 관한 연구 = Thermal performance of a solar collector using phase change materials
서명 / 저자 상변화 물질을 이용한 태양열 집열기 성능에 관한 연구 = Thermal performance of a solar collector using phase change materials / 최남규.
저자명 최남규 ; Choi, Nam-Kyu
발행사항 [대전 : 한국과학기술원, 1991].
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소장정보

등록번호

8002556

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9133

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The thermal performance of PCMs in a solar collector-storage unit has been determined to provide the basic design data for house heating and hot water usage. The present solar collector-storage unit consists of three rectangular stainless-steel panels filled with the newly developed heat storage materials [thickened disodium sulfate decahydrate (DSD : $Na_2SO_4\cdot10H_2O$) and sodium acetate trihydrate (SAT : $CH_3COONa·3H_2O$)]. The front surface of the panel is coated with non-grazing black paint to act as a solar absorber. Melting phenomena of DSD and SAT have been tested in the panels during the domestic heating season (February ~ May). The performance of heat storage considerably depends on ambient temperature, solar radiation, initial temperature and melting temperature of PCM. The latent heat storage performance of DSD has been found to be larger than that of SAT. From the melting performance test, DSD has been found to be a more promising latent heat storage material than SAT in domestic heating season since in case for DSD top 35mm melted on a cold day of February (-5℃) while in case for SAT only top 15mm melted on a sunny day of May (25℃). However, the thermal storage efficiency of solar-collector storage unit increases significantly with the additional heat supply from a flat-plate solar collector having natural convection in a state of closed loop in a collector-storage unit integrated with a flat-plate collector. Consequently, most of the stored SAT in the panel can be melted without auxiliary heat source. During the heat recovery stage, the recovered heat in the collector-storage unit was measured using the temperature gain in the continuous circulation of water from the variation of water volume of 20 ~ 100 liter in a tank. At the given water inlet temperature and flow rate, the overall heat transfer coefficient has been found to be in the range of 80 ~ 120 W/$m^2$K. The melt thickness has been correlated with the dimensionless temperature, Fourier and Stefan numbers.

서지기타정보

서지기타정보
청구기호 {MCE 9133
형태사항 vi, 104 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Nam-Kyu Choi
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 86-90
주제 Solar collectors.
상분리. --과학기술용어시소러스
태양열 집열기. --과학기술용어시소러스
Phase transformation (Statistical physics)
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