Application Performances of the Simplified Solar Collectors and for the Drying of Red Pepper

간이(簡易) 태양열(太陽熱) 집열기(集熱器)의 유형별(類型別) 분석(分析) 및 고추건조(乾燥)에의 이용(利用)

  • Choi, Boo-Dol (Department of Food Science and Technology, College of Agriculture, Seoul National University) ;
  • Chun, Jae-Kun (Department of Food Science and Technology, College of Agriculture, Seoul National University)
  • 최부돌 (서울대학교농과대학 식품공학과) ;
  • 전재근 (서울대학교농과대학 식품공학과)
  • Published : 1986.12.01

Abstract

Two different types of solar collector for farm dryer- the flatplate type and the modified tubular type-were constructed and analyzed on their performances. The transparent plastic film, black painted galvanized iron sheet and black vinyl film were used for the cover and absorber of the flat-plate types. The simplified tubular type was constructed with transparent films for the cover and black vinyl films for the absorber Two elliptical iron rings were used to form a tubular shape through which air could pass. No remarkable differences were found in thermal efficiences between the absorbers made with galvanized iron sheet and black vinyl film. The average thermal efficiencies of the solar collectors were 42.8%(max.48.2%, min.38.2%) for flat plate type and 22.971 (max. 25.4%, min. 14.8%)) for tubular one. The empirical equations were proved to be applicable to the prediction of temperature elevation. The tubular solar heat collector was successfully applied to red peppers drying as a practical farm dryer. The drying rate was almost doubled compared to a conventional sun drying.

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