Technology Economy Analysis On Ground Source Heat Pump Air-conditioning System And Optimization Design Of Its Ground Heat Exchanger

With the sustainable development theory being put forward in recent years, people pay more and more attention to energy efficiency and environmental protection. The Ground Source Heat Pump (GSHP) air-conditioning system has been a kind of new technology to save energy and protect environment. This paper gives an overview of technology economy analysis on GSHP Air-conditioning System and optimization design of its ground heat exchanger, which provide helpful suggestion to engineers.First, this paper gives an overview of the history of GSHP system in China and foreign countries. Based on the work principle of the GSHP system, the characteristics of three circulations have been proposed, which are the use of renewable energy saving and environmental friendly, etc. hi terms of technology economy, the GSHP air-conditioning system was compared with the air source heat pump system, the water source heat pump system and the traditional central air-conditioning system. Main indexes are given to evaluate the technology economy of the GSHP air-conditioning system. A practical project was used as an example for the analysis.Ground-loop heat exchanger is an important part of the GSHP air-conditioning system and deferent from other traditional air-conditioning systems. This paper gave detailed designing method of Ground-loop heat exchanger, including load calculation, pipe layout, choice of tubes and its material, antifreeze method, calculation of pressure drop, etc. Taken the GSHP air-conditioning system in the report room of Shandong Institute of Architecture and Engineering as an example, its design was analyzed and the optimization design of ground-loop heat exchanger was proposed.