국내 고집광 태양에너지 이용시스템 설치를 위한 법선면 직달일사량과 청명일 정밀조사

Abstract

Since the direct normal radiation and clear day are a main factor for designing any solar thermal and photovoltaic concentrating system, it is necessary to evaluate its characteristics all over the country. The work presented here are the investigation of direct normal radiation and clear day in Korea. The data utilized in the investigation consist of direct normal radiation collected for 14 years(’90.12～2004.12) and clear-day collected for 23 years(1982～2004) at measuring stations across the country. The analysis shows that the annual-average daily direct normal radiation is 5.4kWh/m2 and the annual-average total clear-day is 92.7days in Korea. We also constructed the contour map of direct normal radiation and clear-day in Korea by interpolating actually measured data across the country.