Abstract

The purpose of this study is to evaluate the energy savings and environmental loads on horticultural facilities utilizing thermal effluents, which utilizes hot water drainage as a heat source, in order to find out whether the effect is sufficient as a heat source for a representative greenhouse system. A heat pump is required to use low temperature heat sources such as thermal effluents, sea water, river water and sewage treatment water. In order to grasp the energy savings, it is necessary to understand the characteristics of the device, and a model was created for this. This was used to evaluate the energy savings and environmental load of the greenhouse system. The energy savings were compared with conventional boilers, heat pumps utilizing hot water drainage, and general heat pumps. As a result, compared to the boiler, general heat pump showed an energy saving of 30% and the heat drain heat source heat pump of 59%. In the case of environmental load, when using thermal effluents as a heat source, it was found that the amount of carbon dioxide generated was reduced by about 50% compared to a boiler.

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