Simulation of operation of an open geothermal system with seasonal variations

Abstract

A mathematical model for the operation of an open geothermal cyclic system for two wells is presented. The production well is supposed to pump hot water from an underground geothermal reservoir. After the use for heating purposes the cooled water is pumped back into the aquifer through the injection well. Various options related to the seasonal needs for hot water are investigated for operating such a system. During the summer months hot water is required in less quantitites. The results of numerical calculations show that it is possible to choose such modes for greater efficiency and increase the time of operation of such a system. © Published under licence by IOP Publishing Ltd.