報告書番号

483016

タイトル（和文）

施設園芸へのヒートポンプ適用技術

タイトル（英文）

UTILIZATION OF A HEAT-PUMP IN GREENHOUSE CULTURE

概要 （図表や脚注は「報告書全文」に掲載しております）

温室におけるヒートポンプの効率的な使用方式を確立するため，当所が開発した水膜熱交換器を組込んだヒートポンプシステムを試作し，性能試験を行った。１．ヒートポンプシステムの性能を表わす成績係数（ＣＯＰ：投入した電力量に対する回収熱）は，熱源水温より５度高い温水を作る場合に約５．１，２０度の温度差で２．９となった。２．水熱源ヒートポンプの成績係数を経済効果のある範囲に維持するためには，１５度以上の熱源水をヒートポンプの電動機容量１ｋｗ当り３５０～４００■／ｈ必要とすることが分った。

概要 （英文）

WE HAVE DEAIGNED HEAT-PUMP HEATING SYSTEM FOR GREENHOUSE TO APPRECIATE THE EFFICIENCY OF HEATING AND THE COEFFICIENTS OF PERFORMANCE OF TH HEAT-PUMP SYSTEM .THIS SYSTEM WAS AND THE COMPRESSOR CAPACITY WAS 3.75 KW,AND NEWLY DESIGNED AIR-WATER HEAT EXCHANGER(T.OKANO,ET AL.1980)WASSTE INSIDE THE GREENHOUSE. THE HEAT EXCHANGER DEVELOPED FOR LOW GRADE HOT WATER ADOPTED THE FLAT PLATE HEAT EXCHANGE SURFACES(EFFECTIVE SURFACE AREA,134SQUAREM) CONSISTING OF NON-WOVEN FABRICSANDWICHED IN BETWEEN TWO PLASTIC FILMS. THE COP OF THIS THIS HEAT-PUMP SYSTEM WAS MEASURED TO BE 5.1 WHEN THE INLET WATER TEMPERATURE OF THECONDENSER WAS 5.1 DEGREE HIGHER THAN THAT OF THE EVAPONATAR,IT DIMINISHED TO 4.1 WHEN THE TEMPERATURE DIFFERENCE BETWEEN CONDENSER AND EVAPORATOR EXPANDED AT 20 DEGREE THE OVERALL COP, WHICH IS ADDED THE ENERGY CONSUMPTION OF PUMPS AND FAN EQUIPPED WITH THE HEAT-PUMP AND HEAT EXCHANGER TO THE ENERGY CONSUMPTION OF THE HEAT-PUMP ITSELF,WAS MEASURED TO BE 3.5 WHEN THE TEMPERATURE DIFFERENCE WAS 5.1 DEGREE AND IT DIMINISHED TO 2.9 WHEN THE TOMPERATURE DIFFERENCE EXPANDED AT 20 DEGREE. A WATER-TO-WATER HEAT-PUMP NEEDS ABOVE 15 DEGREE WATER AT THE RATE OF 350-400 L/MIN PERL KW OF COMPRESSOR CAPACITY TO PRESERVE CONSIDERABLY ECONOMIC UTILIZATIONS,THEREFORE THIS HEAT-PUMP WOULD BE ONLY APPLICABLE TO THE PLACE WHERE SUBTERRANEAN WATER OR THERMAL EFFLUENT WILL BE OBTAINED.THE STUDY WITH HEAT-PUMP USING AIR FOR HEAT SOURCE OF EVAPORATIR WILL BE NEEDTO PERFORM THE ENERGY EFFECTIVE USE IN GREENHOUSE CULTURE.

報告者

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