The thermal performances of three types of ground heat exchangers (GHEs) installed in a steel pile foundation including double-tube, U-tube and multi-tube have been investigated in short-time period of operation. The performance of the GHEs descends gradually due to the heat buildup in the surrounding ground with operating time in continuous operation. Alternative operation modes (cooling, heating, and hot water heating) over a short-time period of operation for ground source heat pump (GSHP) system can be alternative solution to increase its performance. Experimental study was carried out in discontinuous operation in 2 hours operation with constant interval of off-time. As a result, the heat exchange rate in the short-time period of operation in discontinuous operation increases of 53.1 % for double-tube, 33.3 % for U-tube, and 29.1 % for multi-tube compare with in continuous operation.