Study On Regional Adaptability Of Pipe GSHP

At present, GSHP system attracts much attention and develops very well because of its advantages, including steady, highly-efficient, economical, environment-protected, of which, three styles, Ground Water Source Heat Pump(GWSHP), Surface Water Source Heat Pump(SWSHP), Pipe Ground Source Heat Pump(PGSHP), the third style system develops the most well because it is more friendly for the environment than the other two style systems. However, there exists much hot topics that worth to discuss further, like how to get more accurate underground thermal physical property parameters to supply more exact design consideration and ensure the GSHP system's operation effect and efficiency; so many influence factors'influence depth; the underground temperature variation during the system's operation long period time(20 years); the five representative cities of our domestic five thermal performance subsections provide various application and operation conditions, which results the Pipe GSHP system is typical of regional adaptability. So, this dissertation will study on the above topics and hope to offer some guide and suggestion for the GSHP system development all over the country.The publish and implementation of《Technical code for ground-source heat pump system》(GB50366-2005) (2009) clears and definites the thermal response test's place in the GSHP technology, supplements the relevant terms, field investigation requirements, test measures for the implementation and so on. This thesis summarizes the thermal response test's study progress of GSHP these days, and takes a project case of thermal response test to calculate the underground thermal physical property parameters and heat exchanger amount reference value per meter of borehole both in summer and winter using the methods that《Technical code for ground-source heat pump system》recommends.On the basis of GSHP heat transfer modes in hand and combining analytic solution and numerical solution, this paper establishes vertical U-tube GSHP heat transfer mode to simulate its many influence factors'influence depth, operating performance during the system's long operation period time, heat unbalance and regional adaptability using the MATLAB software.