Evaluation of CO₂ Emissions from End-use Heat and Power Supplying Systems

Abstract

It is required for the energy systems to satisfy simultaneous solutions to the problems, such as cost reduction, global warming, assurance of energy security, and resource conservation. To evaluate optimal end-use energy systems from the stand point of CO 2 emissions, we apply a comprehensive approach based on the life cycle assessment. Several combinations of electricity and heat supplying systems are compared. They include the electricity driven heat pump, gas engine co-generation, absorption refrigeration and so on. Calculations represent total CO 2 emission by energy consumption of several operation patterns, based on the actual data of energy demand, CO 2 intensity of the grid electricity and the equipment specifications. The results indicate that CO 2 emissions can be minimized by maximum utilization of electricity from the grid.