Paper Conference

Proceedings of Building Simulation 2011: 12th Conference of IBPSA


The relationship between heat load profile and energy efficiency in district heating and cooling plant

Yuki Hattori, Shinya Nagae, Yoshitaka Uno

Abstract: This study aims to clarify the influence of heat load profile on energy efficiency in district heating and cooling system (DHC). At present, energy efficiency of DHC plant is evaluated by the energy efficiency ratio (EER) which means the ratio of annual heating and cooling heat production to annual primary energy consumption. However, the climate and heat load profile, which are specific in each plant, have impacts on energy efficiency. In this study, the relationship between energy efficiency and heat load profile is examined by “standard DHC simulation model” which optimizes plant configuration in a given heat load profile. The simulation results revealed that the ratio of cooling load to heating load affects energy efficiency strongly, especially in absorption chiller and boiler type plant. Furthermore, it is proved that cooling load levelling causes a higher energy efficiency.
Pages: 1926 - 1933