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)

Untitled

-- If anyone has a more accurate/relevant picture to put on this article, it would be much appreciated; I'm pretty sure the current one is a picture of exactly what HDR/EGS is _not_. I'll work on it -- mebbe -- if I can, but my drawing skillz are almost non-existent.Little hacksaw 23:51, 24 June 2007 (UTC)

tar sand

Has anyone considered using this to extract oil from Canada's tar sands? It would help with the wastewater problem, and, hey, the companies probably know a thing or two about drilling.--Joel 23:25, 29 June 2007 (UTC)

Yes there is a group of companies planning on drilling a test well. It is not expected to be economic because of the depth that you need to drill to in that area of the tar sands. —Preceding unsigned comment added by 24.85.227.218 (talk) 06:44, 2 April 2009 (UTC)

Soultz project

Please can someone with more technical knowldge than me add information on the Soultz Project, in Alsace, France, also referred to in the Rosemanowes Quarry article? Vernon White ^{. . . Talk} 23:27, 26 January 2008 (UTC)

See also Soultz project IN FRENCHVernon White ^{. . . Talk} 23:49, 26 January 2008 (UTC)

Removing refs and links

This article looks more advertisement for Australian government. The political messages and ads should be removed in regards to wikipedia international targets. Hidden fact (talk) 03:29, 8 January 2011 (UTC)

I am removing one reference and all external links for these reasons;

Problems with references;

Reference 1 broken link; http://geothermal.inel.gov/publications/future_of_geothermal_energy.pdf Removed

Ref 2: An australian politition *mentions* 'hot rocks', and that's about it. Nothing about the earthquake that the citation is supposed to back up. http://www.abc.net.au/lateline/content/2007/s1938273.htm left in for now

External Links;

• Australian resources

Link broken

• US Department of Energy (DoE) resources

Link broken

• Swiss HDR program

Link broken

• • Current Project in Basel

Spam. Geopower Basel AG.

• • Current Project in Basel (English)

"This website is temporarily closed." "Website closed on June 11, 2007"

• Geodynamics (HDR development company)

Spam Geodynamics Limited 2008

• Geothermal Energy Facts

Pseudo-science , possibly spam

• Videoed interview with Prof Tester of the MIT

Youtube video spam with adverts

• Geodynamics-produced video on Hot Dry Rock

video spam

• The Case for Geothermal Energy, Nov 07

broken

• eere.energy.gov: Geothermal Technologies Program: Enhanced Geothermal Systems Technology

Claums to be government - "US Dept of Energy" ? Not sure

• freepatentsonline.com: Patent for flame drill giving 8 cm/minute in granite

No idea why this is here. —Preceding unsigned comment added by Chzz (talk • contribs) 03:06, 14 May 2008 (UTC) Đ

MEGS?

The section at the bottom of the page titled "Modular Enhanced Geothermal Systems (MEGS)" is unreferenced, uninformative and poorly written. I suggest that it be either improved or deleted. --Dwane E Anderson (talk) 01:58, 15 December 2008 (UTC)

Whatt is on google on MEGS leads me to think its a spoof or a spam and we would be better ff without it! Vernon White ^{. . . Talk} 12:09, 15 December 2008 (UTC)

Also the article incorrectly states that the MIT report says that EGS can produce free electricity. —Preceding unsigned comment added by 24.85.227.218 (talk) 06:46, 2 April 2009 (UTC)

Additional risks needing coverage

The article talks about increased seismic risk, which are certainly earthshaking, but has no mention of other risks. Someone with good references or expert knowledge needs to add information about these. Many of the sites are in locations that do not have enough water resources to meet present or planned future needs - It will be a political and engineering issue to get enough water to run these enhanced systems. The water that is injected exceeds the amount of hot water that is recovered for energy production. The difference may impact local water supplies, both underground and surface. This issue will of course be quite different at different sites. The hot water passing through the rocks will leach minerals and bring them to the surface. These minerals may include heavy metals, sulfur compounds and chlorine compounds that must either be removed at additional expense or proven harmless, also an expensive process. Only political pressure will ensure that the tainted water doesn't just get dumped. Chiverisimilidude (talk) 01:05, 29 April 2011 (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)

External links modified

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Greetings, edits to the links look good! Hoping to add more information about the FORGE site to this article. Sammiewolf (talk) 04:48, 18 October 2021 (UTC)

All, I will be adding references to scientific papers regarding the FORGE site section. This article lacks a lot of scientific literature discussing geology, characterizzation of sites and so on. MsThermal (talk) 18:42, 26 November 2021 (UTC)

USA projects: Cornell University EGS

Under the USA section in regards to relevant projects I think this page would benefit by adding in Cornell University's development of Earth Source Heating. It is the first project of its kind for the location using this technology (EGS) to develop district heating for their Ithaca Campus. Expanding on the nature of the site and the current progress of the project would provide more information of Enhanced Geothermal Systems in the United States. Let me know what you think (December 2020) — Preceding unsigned comment added by Akiss321 (talk • contribs) 00:05, 8 December 2020 (UTC)

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)

---

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)