Numerical Analysis of Enhanced Conductive Deep Borehole Heat Exchangers

Geothermal energy is a reliable and mature source, but it represents less than 1% of the total renewable mix. While enhanced geothermal system (EGS) concept faces technical validation challenges suffers from public acceptance issues, development unconventional deep-well designs can help to improve their efficiency reliability. Modelling single-EGS-well key assessing long-term thermal performances, particularly in geological settings. Numerical results obtained with T2WELL/EOS1 code have been validated available experimental data deep borehole heat exchanger (DBHE), where temperature 358 ∘C has measured at depth 1962 m. Based on calibrated model, performances two conductive DBHEs graphite were compared for high gradients. The analysis highlights potential recovery variable fraction vapour. Graphite used along well appears be most suitable solution enhance output by 5 8% when conventional wells. theoretical implementation such Newberry volcano field was investigated single doublet DBHE. findings provide robust methodology assess alternative engineering solutions current practices.