人工光型植物苗工場における消費電力量と電力料金の試算例

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The objective of this study was to estimate the electric energy consumption used for lighting and air conditioning and its cost in a transplant production factory with fluorescent lamps as the sole light source, using the following dimensions and assumptions: 1) the transplant production factory is 10.2m wide, 12.0m long and 3.0m high, 2) the heat transmission coefficient of the factory walls is 0.38W m^<-2> K^<-1>, 3) the number of air exchanges of the factory is 0, 0.001, 0.01, 0.03, 0.05 or 0.1h^<-1>, 4) in the factory, there are three growth cabinets (1.8m wide, 10.0m long and 2.5m high, each) each with 5 modules for holding 1,485(=3×5×99) transplant trays in total, 5) the photosynthetic photon flux (PPF) with 16-hour photoperiod per day is 100, 200 and 300μmol m^<-2> s^<-1> for the first, second and third 10 days, respectively, by using fluorescent lamps (110W, 8,9601m, each). 6) air temperature, relative humidity and CO_2 concentration inside the factory during the photoperiod are, respectively, 25℃, 70 0x1.3384p-890nd 800μmol mol^<-1>, 7) electricity cost (The Tokyo Electric Power Co., Inc., Feb., 1998) during the daytime (8a.m. to 10p.m.) is 14.30 Yen/kWh from July to September, and 13.40 Yen/kWh from October to June, and electricity cost during the night-time is 6.25 Yen/kWh, 8) the average net photosynthetic rate and respiration rate per unit transplant tray area are 0.2mgCO_2 m^<-2> s^<-1> and 0.02mgCO_2 m^<-2> s^<-1>, respectively, and 9) the cost of CO_2 is 170 Yen/kg. Under these conditions, fluorescent lamps generate 50, 99 or 149 kW of heat energy in the factory, respectively, when PPF at the transplant tray surface is 100, 200 or 300μmol m^<-2> s^<-1>. The annual average of the heat transmission rate through the walls is -1.3kW (heat flows from inside to the outside the factory). The annual average of the heat transfer rate by ventilation is -3.6, -31.7, -95.1, -158.6 or -317.1kW when the number of air exchanges of the factory is
1998-06-01

人工光型植物苗工場における消費電力量と電力料金の試算例

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