Abstract
Since it is difficult to preserve horticultural crops such as vegetables for a long time, they are increasingly cultivated in a greenhouse and a plant factory for stable supply over a year. Especially in cases of the greenhouse, which size has been increasing for increased-yield and high-efficiency cultivation. Generally, in the greenhouse horticultural, it is necessary to keep the thermal environment inside the greenhouse to be different from the outside environment, therefore energy consumption for thermal environment control has been significant issues. In terms of energy conservation, energy consumption is being reduced by introducing a gas heat pump, operation control of air-conditioning equipment such as circulation fans, and ventilating by opening and closing a skylight. On the other hand, in terms of stable growth of the crops, it is important to homogenize the thermal environment such as temperature and CO2 concentration. In this study, an energy management technology that contributes to balancing the homogenized thermal environment and energy conservation is focused. In this report, the validity and effectiveness of spatiotemporal prediction method of the thermal environment has been presented by comparing multi-point measurements and numerical simulation of a large-scale greenhouse.
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