実用規模閉鎖型苗生産システムのエネルギ収支 Energy Balance of a Commercial Scale Closed Transplant Production System

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The energy balance of a commercial scale closed transplant production system was investigated to estimate the energy consumed by the system and to find the optimal strategies of environmental control of the system. The system consisted of a transportation/irrigation machine, four basic modules and thermal insulation wall. The basic module consisted of shelves, lamps, air conditioners, fans and a humidifier. Sweetpotato (Ipomoea batatas (L.) Lam. cv. Beniazuma) transplants were grown for 15 days under conditions of 140/200/320μmol m^<-2>s^<-1> (1-5/6-11/12-15 days after planting, respectively) photosynthetic photon flux with 16h d^<-1> photoperiod, 28℃ air temperature, 74% relative humidity and 990μmol mol^<-1> CO_2 concentration in the system. The total electric energy consumed by the system during 15 days when four basic modules operated was 764 MJ m^<-2>. The system's lamps, air conditioners, fans, humidifiers and transportation/irrigation machine consumed 78.4%, 10.6%, 7.1%, 0.7-0x1.fbe9p+0nd 3.226662615000f the total electric energy consumed by the system, respectively. The electric energy cost per transplant, depending on the seasonal electric energy charge, was 2.5-2.6 Yen. The ratio of net chemical energy fixed by transplants to the total electric energy consumed by the system was estimated at 0.006 when the transplants grew normally. The coefficient of performance of the system was 8.0 and about 2 times higher than that described in the catalog of the air conditioner. The maximum percentage of heat energy transported by ventilation and penetrated through walls and floor to the cooling load of the system was estimated at 0.18-1228201088n summer and -25 139463720n winter.

The energy balance of a commercial scale closed transplant production system was investigated to estimate the energy consumed by the system and to find the optimal strategies of environmental control of the system. The system consisted of a transportation/irrigation machine, four basic modules and thermal insulation wall. The basic module consisted of shelves, lamps, air conditioners, fans and a humidifier. Sweetpotato (IPomoea batatas (L.) Lam. cv. Beniazuma) transplants were grown for 15 days under conditions of 140/200/320μ molm<SUP>-2</SUP>s<SUP>-1 </SUP> (1-5/6-11/12-15 days after planting, respectively) photosynthetic photon flux with 16h d<SUP>-1</SUP> photoperiod, 28°C air temperature, 74% relative humidity and 990μmol mol<SUP>-1</SUP>CO<SUB>2</SUB> concen-tration in the system. The total electric energy consumed by the system during 15 days when four basic modules operated was 764 MJ m<SUP>-2</SUP>. The system's lamps, air conditioners, fans, humidifiers and transportation/irrigation machine consumed 78.4%, 10.6%, 7.1%, 0.7% and 3.2% of the total electric energy consumed by the system, respectively. The electric energy cost per transplant, depending on the seasonal electric energy charge, was 2.5-2.6 Yen. The ratio of net chemical energy fixed by transplants to the total electric energy consumed by the system was estimated at 0.006 when the transplants grew normally. The coefficient of performance of the system was 8.0 and about 2 times higher than that described in the catalog of the air conditioner. The maximum percentage of heat energy transported by ventilation and penetra-ted through walls and floor to the cooling load of the system was estimated at 0.18% in summer and -25% in winter.

収録刊行物

  • 植物工場学会誌

    植物工場学会誌 13(4), 254-261, 2001-12-01

    日本植物工場学会

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各種コード

  • NII論文ID(NAID)
    10008025859
  • NII書誌ID(NCID)
    AN10451761
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09186638
  • NDL 記事登録ID
    5995084
  • NDL 雑誌分類
    ZR3(科学技術--生物学--植物)
  • NDL 請求記号
    Z18-3397
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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