Relative climate suitability of ground source heat pumps

Taking the mean annual temperature of ground surface, degree-hours difference, net radiation difference and accumulated excess humidity ratio as evaluating indicators, adopts overall fuzzy evaluation method to research relative climate suitability of ground source heat pumps. Taking nine cities in the Yangtze valley as examples, apply the method to analyse the relative climate suitability of ground source heat pumps. The results show that the degree-hours difference and the accumulated excess humidity ratio have more important effect on the application of ground source heat pumps, and the influences of the others are smaller.