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This paper investigates and analyzes a typical multi-zone office building’s   annual energy performance for the location and climate data of central   Belgrade. The aim is to evaluate the HVAC system’s and HR unit’s performance   in order to conduct the most preferable heating and cooling solution for the   typical climate of Belgrade city. The energy performance of four HVAC system   types (heat pump - air to air, gas-electricity, electrical and fan coil   system) was analyzed, compared and evaluated on a virtual office building   model in order to assess the total annual energy performance and to determine   the efficiency of the HR unit’s application. Further, the parameters of an   energy efficient building envelope, HVAC system, internal loads, building   operation schedules and occupancy intervals were implemented into the   multi-zone analysis model. The investigation was conducted in EnergyPlus   simulation engine using system thermodynamic algorithms and surface/air heat   balance modules. The comparison and evaluation of the obtained results was   achieved through the conversion of the calculated total energy demand into   primary energy. The goal is conduct the most preferable heating and cooling   solution (Best Case Scenario) for the climate of Belgrade city and outline   major criteria in qualitative enhancement

Energy performance modelling and heat recovery unit efficiency assessment of an office building