Talk:Enhanced geothermal system

Wiki Education Foundation-supported course assignment

This article was the subject of a Wiki Education Foundation-supported course assignment, between 23 August 2021 and 10 December 2021. Further details are available on the course page. Student editor(s): MsThermal. Peer reviewers: San264, Regulustar.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 20:38, 16 January 2022 (UTC)

Better reference for term Hydroshearing

An earlier reference for "hydroshearing" can be found in Cladouhos et al., 2009, Toward More Efficient Heat Mining: A Planned Enhanced Geothermal system Demonstration Project, GRC Transactions, Vol. 33, 2009 (http://pubs.geothermal-library.org/lib/grc/1028449.pdf)

Merger proposal

The following discussion is closed. Please do not modify it. Subsequent comments should be made in a new section. A summary of the conclusions reached follows.

The result of this discussion was to merge. Chidgk1 (talk) 16:20, 6 June 2022 (UTC)

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I propose merging Hot dry rock geothermal energy into Enhanced geothermal system. I think the content in Hot dry rock geothermal energy can easily be explained in the context of Enhanced geothermal system, and a merger would not cause any article-size or weighting problems in Enhanced geothermal system.Chidgk1 (talk) 17:43, 30 May 2022 (UTC)

Support -- our readers would benefit from seeing these two very-closely-related topics together in one article. Also: the articles were merged in 2009, but then unmerged by a new user in 2015 without any discussion. — hike395 (talk) 14:37, 1 June 2022 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

Un-merging EGS and Hot Dry Rock

I see that there was a decision made a few months ago to merge the EGS and Hot Dry Rock pages. I would suggest un-merging them as I think they only partly overlap. Hot dry rock is a type of rock, and EGS is a technology to access geothermal heat. EGS technology doesn't have to be used in hot dry rock (hot dry rock is very deep and EGS can be used in shallower rock), and EGS is not the only technology that works in hot dry rock (closed-loop geothermal is another option for getting heat from hot dry rock). I worry that putting both of these pages together in one page could cause readers to misunderstand the differences between EGS and HDR or to think that they are always used together. 2601:184:407F:7890:F4E2:3149:B7C:C474 (talk) 19:44, 18 January 2023 (UTC)

You almost certainly know more than me as I am not an expert, so why would hot dry rock be worth an article?

Also I understood the 2 types are binary and flash so how does closed loop geothermal fit in? Isn’t almost all geothermal power closed loop nowadays so isn’t it covered in the general Geothermal power article?

Can you explain in simple terms for me? Chidgk1 (talk) 12:56, 20 February 2023 (UTC)

No, none of the previously mentioned technologies are "closed loop" in the sense of being independent of rock permeability etc.

Only Hot Dry Rock would be "closed loop". Mflori (talk) 12:33, 24 May 2023 (UTC)

In the literature, "Enhanced System" relates to new technologies to improve rock permeability, e.g. with special stimulation techniques.

"Hot Dry Rock" or "Advanced Geothermal System" relates to a closed-loop system. I.e., these systems do not depend on permeability and do not use any stimulation at all.

The header of the article is, therefore, already misleading as it mixes the two technologies. In practice, these technologies are mutually exclusive, i.e. there is no sense in using both approaches at the same time. Mflori (talk) 12:40, 24 May 2023 (UTC)

@Mflori: Are you the same person as 2601:184:407F:7890:F4E2:3149:B7C:C474 please? Sorry I am still confused - you are saying there is a technology called “Hot Dry Rock” not just that “Hot dry rock is a type of rock” as 2601:184:407F:7890:F4E2:3149:B7C:C474 has told us? Chidgk1 (talk) 14:43, 31 May 2023 (UTC)

Rather than confusing readers with an article titled “Hot dry rock” maybe we should add a section called “Advanced Geothermal System“ based on page 15 of https://mc-cd8320d4-36a1-40ac-83cc-3389-cdn-endpoint.azureedge.net/-/media/Files/IRENA/Agency/Publication/2023/Feb/IRENA_Global_geothermal_market_technology_assessment_2023.pdf into Geothermal energy? What do you think? Chidgk1 (talk) 14:56, 31 May 2023 (UTC)

The "header" is called the "lead" in Wikipedia jargon. I have removed HDR from the lead per your comment. Also feel free to edit articles yourself of course Chidgk1 (talk) 15:08, 31 May 2023 (UTC)

I amended the lead - could you check and improve the article further? Chidgk1 (talk) 13:05, 20 February 2023 (UTC)

This article says “ an HDR system ……… recovers Earth's heat from hot but dry regions via the closed-loop circulation of pressurized fluid” so what do you mean when you talk about “closed loop” please? Chidgk1 (talk) 13:18, 20 February 2023 (UTC)

Totally agree, the article should certainly be split. The two technologies are totally different. Mflori (talk) 12:29, 24 May 2023 (UTC)

So are you a different person to the IP? I have asked Wikipedia_talk:WikiProject_Geology#Split_proposal for more opinions Chidgk1 (talk) 20:11, 5 September 2023 (UTC)

Please define the scope of the proposed split articles so that we can see how much overlap there may be. Please ping with reply.· · · Peter Southwood ^(talk): 15:26, 29 September 2023 (UTC)

Agreeing that these pages should be split. Hot Dry Rock should have its own page or (my recommendation) could be a section within the Geothermal Energy page. Hot Dry Rock is an environment in which geothermal energy can be accessed. It is not a technology type in and of itself. It is certainly not a variant or subcategory of Enhanced Geothermal Systems, and when organized in this way would suggest the only way to access HDR is using EGS (incorrect).

There are two broad categories of geothermal technology that are being developed to access Hot Dry Rock energy. The first is Enhanced Geothermal Systems. The second is Closed Loop Geothermal Systems (sometimes called Advanced Geothermal Systems). I recently drafted a page for Closed Loop Geothermal Systems, which did not previously exist, that is now under review. Nemesia345 (talk) 03:32, 1 December 2023 (UTC)