6Jitendra B, Foster S G . Hunt represent operating problems of commercial ground source and groundwater - source heat pumps [J ]. ASHRAE Transaction, 2000, 106(2) : 561 -568.
7Hughes P J. Survey of water - source heat pump system configurations in current practice[ J]. ASHRAE Transactions, 1990, 96( 1 ) : 1021 - 1028.
8Shonder J A , Hughes P J , Beck J V. Determining effective soil formation thermal properties from field data using a parameter estimation technique [ J ]. ASHRAE Transactions, 1999, 105 ( 1 ) : 458 -466.
9Omer A M. Ground - source heat pumps systems and applications [ J ]. Renewable and Sustainable Energy Reviews, 2006, 10:1 -28.
10Zeng H Y,Diao N R and Fang Z H.Heat Transfer Analysis o f boreholes in vertical ground heat exchangers[C].Internationa l Journal of Heat and Mass Transfer.2003,46(23): 4467-4481.
