A FAST ALGORITHM FOR THE HOURLY SIMULATION OF GEOTHERMAL HEAT EXCHANGER

摘要

The development and solution of heat transfer model for geothermal heat exchanger (GHE) is the key in the research and application of ground source heat pump (GSHP). An analytic solution of heat transfer problem in the GHE has been obtained by Zeng(2002) based on the superposition principle. However, analytic solution is quite time-consuming in long-time hourly simulation, which is caused by convolution in calculation. This paper improved the convolution using fast Fourier Transform (FFT) approach. The algorithm present in this paper can realize fast calculation of long-time hourly simulation for fluid temperature response inside the pipe.