Paper Conference

Proceedings of eSim 2006: 4th Conference of IBPSA-Canada

     

ANALYSIS OF ENERGY, EXERGY AND GHG EMISSIONS APPLIED TO VAV SYSTEMS IN AN OFFICE BUILDING

Zhentao Wei, Radu Zmeureanu

Abstract: This paper presents a combined analysis of energy, exergy and greenhouse gas (GHG) emissions applied to the evaluation of the operation of two variable air volume (VAV) systems in an office building in Montreal. Energy and exergy related indices such as energy consumption, energy efficiency, exergy destruction, entropy generation and exergy efficiency are estimated at both system and power plant levels. The energy and exergy analyses reveal that the electric boilers contribute to more than 60% of the total energy consumption and exergy destruction at the system level while the entire VAV systems consume more than 66% of the total exergy input at the power plant level. More appropriate selections of heating sources can significantly improve the energy and exergy performance of heating, ventilating and airconditioning (HVAC) systems applied to office buildings. Exergy flow charts identify exergy interactions between components. Finally, some improvements to the operation of HVAC systems used in office buildings are recommended.
Pages: 9 - 16
Paper:
esim2006_009_016