Development of an assessment model for greenhouse using geothermal heat pump system

In Korea, the heating cost for the Horticulture industry is considering as a big problem where it occupies about 58% from total costs. Almost 80% from the heating systems are using fossil fuel where it cause economic crisis. Since industrialization, environment pollution, global warming and lack of natural resource were occurred because of increased rapidly using of fossil fuel. Among the renewable energy, ground heat pump system is suitable to control internal environmental conditions in greenhouse where it has a steady temperature. Generally conventional greenhouses are using the oil heating system during the cold season. Accordingly, the geothermal heating system is used for reducing costs of heating, management and operation. But the initial investments of the geothermal heating system are very high in comparison to conventional heating system because of its equipment costs. Consequently, according to exact calculations of heating load, greenhouse geothermal heating systems must be designed efficiently.