engleski

Numerical Analysis of a Heat Pump and Air-Conditioning System Performance

Numerical analyses, performed as a part of a redesign project for a heat pump and air-conditioning system in a sport hall, have been presented. The project goal was to reduce the energy consumption and costs for heating and cooling the building as well as to increase the thermal comfort inside the building. All year round simulations of the building energy consumption have been performed for different building insulation levels. The numerical dynamic model with concentrated parameters has been used to simulate the dynamic behavior of the heat pump system using the sea water as a heat source. The heat pump system model has been built as the modular framework, with subroutines representing equipment, pipes, tanks and controllers. Equipment data acquired from manufacturers (heat pumps, heat exchangers, controllers and pumps) have been implemented into a model in order to simulate the analyzed system. Hourly values have been evaluated for temperatures within the system, heating and cooling energy supplied by the heat pump, as well as compressor electric energy consumption during the entire year. The choice on the building insulation level has been done by using the simulation data. The proper air distribution was achieved by using numerical simulations of air flow inside the building for different air-duct arrangements, with CFD software FLUENT, based on a finite volume method.

heat pump; simulation; air -flow; CFD

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