An Evaluation Study of Domestic Direct(Beam) Nomal Solar Radiation Data

국내 직달일사량 자원의 평가 연구

  • Published : 1993.05.28

Abstract

Since the direct(beam) normal solar radiation is a main factor for designing any focusing solar system, it is necessary to evaluate its characteristics all over the country. We have begun collecting direct normal solar radiation data since December 1990 at 16 different locations and considerable effort has been made for constructing a standard value from measured data at each station. KIER's new data will be extensively used by concentrating system users or designers as well as by research institutes. From the results, we can conclude that 1) $4,400kcal/m^2$. day of the direct(beam) normal solar radiation was evaluated for clear day. 2) Direct normal solar radiation of spring and summer were 6% and 14%, higher than the yearly average value, respectively, and for fall and winter their values were 5% and 15% than the yearly average value, respectively.

1990년 12월부터 전국 주요 16개지역에 측정네트�p을 구성하고, 직달일사량 자료를 수집하였다. 측정 된 자료를 토대로 지역별 표준치 설정하여 이들 자료를 집광식시스템의 설계자와 관련 연구자들에게 광범위하게 이용될 수 있도록 제시하였다. 현지 측정사업의 내용을 중심으로 지금까지의 결과를 살펴보면, 1) 우리나라의 법선면 직달일사조건은 청명한 날을 기준으로 하루에 $4,400kcal/m^2$내외이다. 2) 연평균치에 대한 계절별 일사조건은 봄과 여름이 각각 6%, 14% 높았으며, 가을과 겨울은 5%, 15% 정도 상대적으로 낮았다.

Keywords