Tests and analysis on energy consumption of heating ventilating and airconditioning systems in commercial buildings
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Abstract:
Three typical commercial buildings in Chongqing, P.R. China were selected to study the actual summertime operation and energy situations of heating ventilating and airconditioning (HVAC) systems in commercial buildings. Based on tests of energy consumption of HVAC systems in these three buildings, we analyzed the electricity consumption of the main components of the airconditioning systems. The energy efficiency of the chillers and airconditioning water distribution systems were studied. The indoor thermal environment in these three buildings were also tested and discussed. It is concluded that problems exist in the airconditioning systems of commercial buildings. Among the problems are oversized system design, low equipment operating efficiencies, poor operation management, and lack of indoor temperature controls. To reduce energy consumption of HVAC systems in commercial buildings, we propose energyefficient strategies such as sizing systems based on accurate load calculation and automatic control under partialload conditions.
