Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7934999 | Solar Energy | 2018 | 11 Pages |
Abstract
The aim of this experimental study is made to examine the performance of a new conic helicoidal geothermal heat exchanger (CHGHE) for greenhouse heating. The main advantage of this geometry of heat exchangers type is to reduce the used area and the operating cost compared to horizontal and vertical, respectively. An experimental study is composed of CHGHE implanted in 3â¯m depth connected to a geothermal heat pump which is connected to a ceiling panel installed into a greenhouse. This ceiling unit is constituted of an exchangers suspended in internal air and others placed on the ground. This conditioning system allowed a recover the energy in excess into the greenhouse during the day by the exchangers placed on the ground, or, this energy stored is brought back to heat the air in the greenhouse by the suspended exchangers during the night. The experimental results showed that the recovered heat rate from the ground by the CHGHE is about 4.7â¯kW. However, they are between 12â¯kW and 10â¯kW in into greenhouse. The coefficient of the performance of the heat pump (COPhp) and the overall system (COPsys) were found to be 3.93 and 2.64 respectively. The geothermal system insure a quantity of heat equal to 692.208â¯kW witch correspond to a temperature increasing of 3â¯Â°C under greenhouse for an optimal water flow rate of 0.6â¯kg/s.
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Hassen Boughanmi, Mariem Lazaar, Amenallah Guizani,