報告書番号

U86055

タイトル（和文）

空気熱源ヒートポンプの栽培条件下における温室の暖・冷房性能

タイトル（英文）

HEATING AND COOLING PERFORMANCE OF AIR-TO-AIR HEAT PUMPS JNSTALLED IN THE GREENHOUSES WITH VEGETABLES GROWTH

概要 （図表や脚注は「報告書全文」に掲載しております）

農事用に開発した空気熱源ヒートポンプと蓄熱式空気熱源ヒートポンプの２種類のヒートポンプを温室に設置して暖・冷房除湿性能試験とメロン，トマトの栽培実験を行った。空気熱源ヒートポンプは赤城試験センターの温室に設置し，夏期の夜間は１９度に冷房し，冬期の夜間は８度に暖房して，水耕栽培法によりトマトの栽培を行った。ヒートポンプの成績計数（ＣＯＰ）は２．２～２．３であった。蓄熱式空気熱源ヒートポンプは我孫子研究所のガラス温室に設置し，水耕栽培法によりトマトとメロンの栽培を行った。夜間の設定気温は１０度で蓄熱温水からの放熱だけで１０度を維持できた。ヒートポンプの成績計数（ＣＯＰ）は暖房時は２．６，冷房時は２．２であった。冬期と夏期におけるトマトならびに夏期のメロン栽培実験の結果はいずれも良好であった。

概要 （英文）

THE APPLICATIONS OF HEAT PUMPS TO AIR-CONDITIONING OF GREENHOUSE ARE NOW IN INVESTIGATION FROM A VIEW POINT OF DEVELOPING UTILIZATION OF ELECTRICITY IN THE AGRICULTURAL FIELDS. THE EFFICIENCY OF THE HEAT-PUMP USING AIR AS A HEAT SOURCE WAS NOT SO GOOD AS THAT USING WATER. THE HEAT PUMP USING AIR. HOWEVER. IS NOT ONLY CHEAPER THAN THE OTHERS. BUT ALSO EASY TO HANDLE. SO THAT IT IS STILL WORTH APPLYING AS A PRACTICAL ONE TO AIR-CONDITIONING OF GREENHOUSE IN THE RESTRICTED AREA SUCH AS WHERE THE LOAD OF HEAT PUMP IS NOT SO LARGE. IN ORDERTO INVESTIGATE THEIR UTILITIES. WE INSTALLED TWO KINDS OF HEAT PUMPS BOTH USING AIR AS A HEAT SOURCE. AND OPERATED THEM AS HEATER. COOLER. AND HUMIDITY CONTROLLER IN GREENHOUSE. ONE WAS DEVELOPED BY COOPERATIVE WORK BETWEEN TOKYO ELECTRIC POWER COMPANY AND HITACHI COMPANY. IT WAS EQUIPPED WITH A HEAT RESERVOIR TO ENHANCE THE EFFICIENCY. AND WAS PLACED AT ABIKO LABORATORY TO CULTIVATE MUSK MELON AND TOMATO HYDROPONICALLY. THE OTHER WAS DEVELOPED BY CO-OPERATIVE WORK BETWEEN TOKYO ELECTRIC POWER COMPANY AND MITSUBISHI ELECTRIC COMPANY. IT WAS PLACED AT AKAGI TESTING CENTER TO CULTIVATE TOMATO HYDROPONICALLY.

報告者

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