Greenhouse Heating Technology Development by Using Riverbank Filtration Water Source Heat Pump

In order to heat greenhouses nearby river channels, a riverbank filtration water source heat pump was developed for getting plenty of heat flux from geothermal energy. An improved Recharging system, a thermal storage tank with separating insulation plate and a filtering tank for eliminating iron and manganese were developed to increase the coefficient of performance (COP) of heat pump. A heating system using riverbank filtration water source heat pump was installed at the paprika greenhouse in the Jinju region where a single fold of vinyl cover and 2 layers of horizontal thermal curtain were installed as part of temperature keeping and heat insulation with a greenhouse area of 3,185 m(2). 320,000 kcal/h was supplied for performing a site application tests. A greenhouse heating test was performed from Oct. 15, 2011 to Feb. 29, 2012. As a result, the COPh of the heat pump was measured in the range of 3.5 similar to 4.0, while COPS of the system was represented as 3.0 similar to 3.5 COP measured of the heat pump was very good and well responded to indoor heating temperature of the environment control system of a green house. Also, the recharging rate was constantly maintained at 60% of intake water.