Composite Ground Source Heat Pump Auxiliary Heat, Cooling Tower Study

Ground source heat pump(GSHP) air conditioning systems ultilize ground soil as a heat source/sink, achieve heat transfer between the soil and a working fluid (water or antifreeze solution) circulating in a closed loop buried in the ground., so as to realize the regulation of indoor environment of buildings. Compared with conventional air-conditioning system with energy-saving environmentally friendly features. In the actual operation of ground source heat pump, when the building cooling load in winter and summer when the heat load does not match, there will be accumulation of heat in the soil affecting ground-source heat pump air-conditioning systems use, therefore, the introduction of engineering often use cooling tower as an aid. But, at present, the heat transfer research and data simulation for cooling tower in the ground-source heat pump system are far from adequate, which to some extent, restricted the composite ground-source heat pump system energy efficiency.In this paper, the main object of study for the hybrid ground-source heat pump system is the air, water flow of heat transfer and flow problems in the cooling tower. For the composite ground-source heat pump system using wet-closed cooling tower, do the following work:1. In this paper, in the wet-closed cooling tower of the hybrid ground source heat pump system design, two-phase(gas and water)convective heat transfer conducted a study to establish a mathematical model.2. As the gas, water and chilled water in the cooling coil have heat transfer between the three-phase in the cooling tower, in order to simplify the simulation process, the cooling coil is equivalent to the wall. The three-phase is conducted as a two-phase flow simulation.3. Reality projects, energy efficiency of the hybrid ground-source system were calculated. Test the thermal stability of the soil when GSHPS with or without the cooling tower.In this paper, cooling tower in hybrid ground source heat pump system in coolin has been studied to address the heat accumulation problem of soil on the basis of the system, seeks to maximize the energy efficiency. The theoretially model and the way of numerical value calculation will offer accord and reference to application and study of HGSHP in engineering.