Short-Time modelling of geothermal systems

Ground-Coupled Heat Pumps (GCHP) are among the most efficient systems to heat and cool buildings. The high initial cost of these systems has hindered their growth in particular for residential applications. Better design methods are welcome to try to optimize the size and then the initial cost of these systems. In the field of ground heat exchanger design, the short-time behavior, which was before, most of the time neglected, is now an important aspect to evaluate. This paper will present the state-of-the-art about short-time modeling of secondary loop geothermal heat pumps and shows by examples, the impact on the final design of GCHP systems