A Simulation Assessment of Performance of Different HVAC Systems in an Office Building

M. Bojic, N. Nikolic, and M. Despotovic (Serbia)


Simulation, heating, air conditioning, office building


The article reports on a simulation assessment of the energy consumption, the energy costs and the environment impact of three HVAC systems used for space heating, and space cooling of an office building in Kragujevac, Serbia. Three analyzed HVAC systems are (1) a system with a natural gas boiler and convective baseboard heaters for water space heating and window air conditioners for air space cooling; (2) a system with a natural gas boiler and individual air reheaters for air space heating and a chiller plant for air space cooling; and (3) an air-to-air heat pump for air space heating, and cooling. The systems were modeled and simulated by using EnergyPlus software. The analysis of the simulation results points out that the first HVAC system has the highest energy efficiency, the best economy, and the lowest environmental impact. That is because this system uses water as a heating medium compared to other systems that use air as a heating, and cooling medium. In addition, this system uses natural gas as a fuel, which is a fossil fuel with the lowest impact to the environment.

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