. Results
A reliable transient heat t ransfer mo del is used to asce rtain the effect of solar thermal energy storage on a
geother mal system. The proposed clos ed loop system is compr ised of a double pipe heat exchanger, and
is sup plied with sol ar thermal energy during the summ er months. The nume rical si mulations are base d
on cases that are comm on in nor thern climates (e.g . Canada). A condu ction-advection based mo del is
used to simulate heat transfer in the ground and in the heat exchan ge pipes for both heat extraction and
heat in jection scenar ios. The const ant power confi guration is empl oyed to accu rately assess t he effec ts of
injec ting therma l energy into a geothermal resource. The mass fl ow rate through the heat exchan ger and
the sol ar energy input are vari ed dur ing summ er cycles to investigate t he infl uence on the uptake of
thermal energy into the geotherma l resource. The effec ts of rate of heat extraction and injec t