Experimental Study on the Influence of Cooling Water Temperature and Night Ventilation on Energy Efficiency the HVAC Systems

Abstract

The energy performance standards imposed on nZEB buildings require measures to reduce energy consumption. The article presents an experimental study demonstrating the reduction of energy consumption through the optimal control of the ventilation / air-conditioning systems, made in an experimental room arranged in an office building in Timisoara. To demonstrate the increased energy efficiency of the HVAC systems, while maintaining the comfort conditions in the building, four control scenarios were studied by varying the chilled water temperature at the evaporator outlet and cooling mode of the chiller condenser as well as the ventilation effects on the at night.