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공동주택에 적용된 PV/T 태양열 급탕시스템 연간 열 및 발전성능 분석
임희원(Lim Hee-Won),이왕제(Lee Wang-Je),윤종호(Yoon Jong-Ho),조성구(Cho Sung-Goo),백남춘(Baek Nam-Choon),신우철(Shin U-Cheul) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.1
A PV/T solar collector, wherein a photovoltaic module and a solar collector are combined into a single component, is considered to be highly reliable, durable, and economically feasible. Additionally, zero-energy buildings have recently drawn significant attention. In this study, the dynamic behavior and energy performance of a PV/T solar hot water system employed in a twenty-storey apartment were analyzed. The said system comprises three 25 EA (a total of 75 EA) PV/T solar collectors and a 15.6 ton storage tank. The TRNSYS 17 software was employed as a simulation tool for conducting the analysis, and the national reference standard weather data (TMY3) of Daejeon, South Korea was incorporated as meteorological data. The obtained results indicate that if the available space is limited and if the aspect of energy efficiency is considered, the usage of PV/T solar hot water systems that simultaneously produce thermal energy and electrical energy can be more advantageous than the usage of standard photovoltaic or solar hot water systems.
고온 지중 계간축열시스템을 갖는 온실의 태양열 난방시스템 장기 열성능평가
임희원(Lim Hee-Won),이현승(Lee Hyun-Seung),이왕제(Lee Wang-Je),신우철(Shin U-Cheul) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.6
In this study, we analyzed the long-term feasibility of a solar heating system for a citrus greenhouse to address the financial difficulties facing farms and to reduce greenhouse gas emissions. The solar heating system consisted of an auxiliary boiler, a solar storage tank with a capacity of 100 ㎥ and a cylindrical borehole thermal energy system (BTES) with a storage volume of 2,905 ㎥. We installed an evacuated tube collector and flat-plate collector (both with a capacity of 302 ㎡) to measure and compare each solar fraction and thermal storage efficiency. TRNSYS 18 was used as the simulation tool. The annual solar fraction was found to be 83.2%, and the efficiency of thermal storage was 35.7%. In this case, the efficiency of evacuated tube collector and flat-plate collector was 68.7% and 33.2% respectively. This shows that the evacuated tube collector, operating at a relatively high temperature, was more efficient than the flat-plate collector. Despite the high solar fraction, the maximum operating temperature of the solar storage tank was 90° or less, indicating that the tank was less likely to fail due to overheating.