Comparative Analysis of Energy Efficiency in Air-conditioning System with GSHP, Electricity-driven Refrigerating Unit and Direct-fired Li-Br Absorption Refrigerating and Heating Unit

摘要

Ground-source heat pump (GSHP) is a renewable energy technology with the advantages of energy saving and environmental friendliness. This paper focuses on the energy efficiency of air-conditioning systems in public buildings in Tianjin. Three public buildings are chosen as case studies with different forms of cold & heat sources. A building with ground-source heat pump for heating and cooling, a building with electricity-driven refrigerating unit for cooling and centralized heat-supply network for heating, a building with direct-fired Li-Br absorption refrigerating and heating unit for heating and cooling are selected. Attempt is made to analyze the actual operating performance of air-conditioning system and evaluate the system energy efficiency in different buildings. The results show that ground-source heat pump air-conditioning system without adequate design and management is not always better than other traditional air-conditioning systems.