報告書番号

483004

タイトル（和文）

寒冷低日照地域に適した省エネルギー温室の開発－保温性を強化した地中熱交換温室－

タイトル（英文）

DEVELOPMENT OF THE ENERGY SAVING SYSTEMS FORGREENHOUSES IN COLD AND LOW INSOLATION REGIONS -UNDERGROUND HEAT EXCHANGE SYSTEM FOR GREENHOUSES INTENSIFIED INSULATION-

概要 （図表や脚注は「報告書全文」に掲載しております）

関東地方などの施設園芸地帯で普及している地中熱交換温室の北陸への適用を考えて，この温室の保温性を強化する実験を行った。地中熱交換温室内に保温用の被覆材を張る枠を設置し，３種類の被覆材を用いて保温性の向上による地中熱交換温室の暖房性能について比較，検討を行った。実験の結果，反射性フィルムのシルバーポリェチレンフィルムが最も効果が大きく，次に白色ポリエチレンフィルム，不繊布の順であるのが認められた。

概要 （英文）

IN HOKURIKU REGION WHERE IS ALONG THE JAPANESE SEA BEING SEVERE CLIMATICAL CONDITIONS,HOWEVER,A CONSIDERABLE NUMBEROF GREENHOUSE CULTURES ARE PERFORMED IN A CONDITION OF TAKING IN A REGIONAL CHARACTERISTICS.IT IS DESIRED TO ACHIEVE THE ENERGY SAVING TECHNIQUES FOR GREENHOUSE CULTURES IN THIS REGION. PREVIOUSLY MATHEMATICAL MODELS OF THREE ENERGY SAVING SYSTEM,UNDERGROUND HEAT EXCHANGE SYSTEM,PELLET GREENHOUSE AND SEMI-UNDERGROUND GREENHOUSE,WERE DERIVED AND TESTED WITH THE ADOPTIONS OF THESE SYSTEMS TO HOKURIKU BY MEANS OF DYNAMIC SIMULATIONS. BASED ON THESE SIMULATIONS,UNDERGROUND HEAT EXCHANGE SYSTEM ADDED THE HIGH INSULATION ABILITY WAS CONSTRUCTED,THE CONSTRUCTION OF THIS SYSTEM WAS SINGLE COVERED GREENHOUSE(76.6 SQUARE M)EQUIPED WITH THE UNDERGROUND HEAT EXCHANGE PIPES AND A FRAME(1.25M HIGH)FOR INNER COVERS.THE PERFORMANCE OF THIS SYSTEM WAS TESTED UNDER DIFFERENT KINDS OF COVERS,AND THE VALUE OF THE HEAT TRANSFER COEFFICIENTS WERE MEASURED BY USE OF THE INSULATION BOX UNDER ONE THRU FIVE COVERS AND SEVERAL COMBINATIONS OF THE DIFFERENT KINDS OF FILMS. SILVER POLYETHYLENE FILM,POLYETHYLENE FILM AND NON-WOVEN FABRIC WERE USED AS A INNER COVERING FILMS.THE EFFECTIVE ORDER OF MAINTAINING THE TEMPERATURE INSIDE THE GREENHOUSE HIGHER LEVEL WAS AS FOLLOWS:SILVER POLY.>POLY.>NON-WOVEN FABRIC.INSIDE-OUTSIDE AIR TEMPERATURE DIFFERENCE WITH SILVER POLY.COVERING WAS ABOUT CENTIDEGREE HIGHER THAN THAT OF ONLY EXTERNAL COVERING. THE HEAT TRANSFERCOEFFICIENTS UNDER ONE THRU FIVE COVERINGS VARIED FROM 6.57KCAL/SQUAREM-H CENTIDEGREE TO 1.04KCAL/SQUARE M-H CENTIDEGREE THE COMBINATION OF PVC FILM AND SILVER POLY.WAS LOWER HEAT TRANSFER COEFFICIENT THAN DOUBLE COVERING OF PVC FILM.NON-WOVEN FABRIC IS USED FOR IMPROVING THE HUMIDITY CONDITION INSIDE THE GREENHOUSE,IT WAS RECOGNIZED THAT THE COMBINATION OF PVC DOUBLE LAYER AND NON-WOVEN FABRIC WAS LOWER HEAT TRANSFER COEFFICIENT THAN THAT OF SILVER POLY.AND PVC FILM.

報告者

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