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Articles

VEGETABLE GROWTH AND ENERGY CONSUMPTION IN A VEGETABLE FACTORY USING OFF-PEAK ELECTRICITY

Article number
229_39
Pages
353 – 359
Language
English
Abstract
A vegetable factory applying natural light for vegetables growth and off-peak electricity for air conditioning has been developed to achieve successive, agricultural chemicals free and labor-saving production.

A movable hydroponic system with spacing according to vegetable growth is adopted for effective use of the cultivating room, greenhouse.
An artificial light and triple thermal screens are equipped to supply additional luminous energy and to reduce the air conditioning load, respectively.

The air cooling load inside the cultivating room could be reduced by 33% in summertime by the thermal screens operated on the basis of the level of outside solar radiation intensity.
The yields of lettuce and spinach were able to be increased by 1.7 times by using the movable tray system as compared with those by a traditional cultivation, fixed density.
The vegetable factory has the advantages of cultivating many kinds of vegetables simultaneously and requiring little electricity demand.

Publication
Authors
T. Okano, T. Hoshi, T. Sekiyama
Keywords
Full text
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