Determining Geothermal Resources in Three Texas Counties

Batir, Joseph; Richards, Maria

doi:10.21423/twj.v13i1.7130

Cited by 2 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, our estimation of underground thermal resources still relies on temperature-depth maps developed in the previous decade. Recent studies have found that certain areas beneath these maps possess a greater thermal potential than currently estimated (Augustine et al 2019, Batir and Richards 2022, Wisian et al 2023, indicating that a comprehensive update of subsurface thermal resource assessments is needed. Furthermore, our modeling assumed a uniform plant size, reservoir design, horizontal length, and vertical drilling cost for a given depth, neglecting likely variability from project to project.…”

Section: Discussionmentioning

confidence: 99%

Geothermal power generation potential in the United States by 2050

Chen,

Merino-Garcia,

Lines

et al. 2024

Environ. Res.: Energy

View full text Add to dashboard Cite

Geothermal energy provides a dispatchable source of carbon-free electricity that can balance the output of variable resources. However, geothermal provides just 3.7 gigawatts (GWe) (<1%) of electricity in the United States today, mostly from hydrothermal resources that are geographically constrained. Enhanced geothermal systems (EGS), which extract heat from deep rock, could be applicable in more locations. However, baseline levels and potential trends in EGS costs have been insufficiently characterized by previous studies. Here, we assess geothermal penetration potential by using as baseline the latest available data on drilling costs from three costing models to create updated estimates of costs and performance. We input those estimates along with various scenarios of cost trends, emissions policies, and electricity demand into the Regional Energy Deployment System (ReEDS) capacity expansion model to simulate electricity generation in the United States through 2050.The scarcity of hydrothermal resources limits deployments to no more than 18 GWe across our scenarios. EGS is more costly than hydrothermal for now, but it has greater potential to scale nationwide. Thus, future deployments of EGS depend strongly on projected cost reductions and emissions policies. In scenarios with moderate (<50%) reductions in costs by 2050, very little EGS is likely to be built, since wind and solar with storage provide lower-cost electricity. However, over 70% cost reductions from our updated baseline would make geothermal the least-cost carbon-free dispatchable resource. Under those cost trends, we project that 3 GWe of EGS would be built by 2050 under existing policies, 11 GWe with a 95% decarbonization policy, and 152 GWe if full decarbonization of electricity is mandated. Most geothermal would likely first be built in western states with the steepest subsurface temperature gradients, although mandates for full decarbonization could drive it to be deployed in other states.

show abstract

Section: Discussionmentioning

confidence: 99%