Talk:Geothermal heating

message: This subject is already covered in geothermal heat pump. I think that geothermal heating should be changed to an article about using relatively hot areas for heating rather than just using the Earth as a thermal mass for a heat pump system. This is what I think of when I hear "geothermal heating". Probably the most common way to use geothermal heating is through district heating systems. They are used to heat homes in Iceland. -- Kjkolb 12:14, 8 December 2006 (UTC)
replies: text: I agree with making this a hub of geothermal technology. Some systems that use the Earth for thermal mass do not have a heat pump, and so would not fit in the geothermal heat pump article. See for example Drake Landing. --Yannick (talk) 23:48, 19 March 2009 (UTC)
replies: text: I've had second thoughts. After further reading, geothermal electric generation schemes such as EGS don't belong under the heading of geothermal heating. So now I think that geothermal power should be the central hub of geothermal technology, which would include direct-use geothermal heating, which in turn would include geothermal heat pumps, earth tubes, downhole heat exchangers, Drake Landing, etc. So I propose to delete EGS from this article, and focus on direct-use technologies here.--Yannick (talk) 05:24, 5 April 2009 (UTC)
thread_title: Redundancy and article purpose

message: The claim that Geothermal Heat Pumps utilize the higher temperatures available below the surface is completely incorrect. The pipes may be buried just a foot or so down and the earth is useful for heat conductivity and stability. A given heat pump can both cool or heat a house in any location by acting as a refrigerator or reverse refrigerator. 
The description of Heat Pump action here is almost entirely incorrect.
I noticed another issue.  The article states, "As a result, the heat is pumped over a smaller temperature difference with a geothermal heat pump and this leads to higher efficiency and lower energy use.[8]"  This statement is counter intuitive.  Heat transfer principles state a higher temperature difference results in higher efficiency or lower energy use.  If this statement is correct, it is misleading and requires rewording or additional explanation.  —Preceding unsigned comment added by 195.33.69.70 (talk) 14:11, 8 October 2008 (UTC)
thread_title: Incorrect Explanation

message: Normally the earth temperature is around 12.8oC (or 55 °F) at depths of 10 ft.
Worldwide? Even near the equator?
Is there a map of global underground temperatures?
Glueball 18:27, 14 February 2007 (UTC)
thread_title:  Worldwide underground temperatures? 

message: The Reference is incorrect. There was no subdidence but only uplift. --78.94.106.74 (talk) 09:06, 17 March 2009 (UTC)
thread_title:  Staufen

message: This article was automatically assessed because at least one WikiProject had rated the article as start, and the rating on other projects was brought up to start class. BetacommandBot 09:52, 10 November 2007 (UTC)
thread_title:  WikiProject class rating

message: The header says that the heat comes from radio active decay of minerals.  To my limited understanding, this sounds ridiculous. The centre of the earth is molten rock which has not cooled down since the universe was created in the Big Bang. The sae kind of molten rock that appears in volcanic erruptions. The outside crust of the earth has merely cooled to the point we are at today but the rock strata a little way down is much hotter. The fluid nature of the hot rock and the "cracks" in the cooled shell are the source of earthquakes.  Surely THIS is the source of the heat and not the radio active decay of minerals!  Does anyone object to me changing this?--Hauskalainen (talk) 22:59, 8 May 2009 (UTC)
replies: text: I object. Radioactive decay of minerals currently produces 30 TW, or about 3/4 of the heat that flows up to the surface. Ref. --Yannick (talk) 02:20, 13 May 2009 (UTC)
replies: text: Besides, the information was already supported by a proper citation.--Yannick (talk) 02:20, 13 May 2009 (UTC)
thread_title:  Source of heat 

message: The section headed Economics reads like cheerleading for sustainable energy.  The very small percetnage of American homeowners who have adopted geothermal have done so out of social concience, not for economic reasons.
The very high installation cost of these systems means that it requires 15-20 years of savings to equal the initial cost.  It would be much more economical to invest those funds in securities.
A proper economics discussion would compare installation cost with savings, and take into acct the time value of money.  —Preceding unsigned comment added by 71.163.115.114 (talk) 01:14, 11 April 2011 (UTC)
thread_title:  NPOV Problem 

message: The concept of Harvesting renewable energy from Earth's mid-infrared emissions merits inclusion, doesn't it? Paradoctor (talk) 16:04, 25 December 2016 (UTC)
thread_title:  Geothermal radiation 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018) 

message: This article is wrongly linked to the the German article Wärmepumpenheizung. 
But that is an article dedicated not to geothermal heating but to heating with heat pumps. And article to this topic is still missing in en.wikipedia. 2001:9E8:244:6500:7C0B:9A6B:7F30:D9E0 (talk) 04:38, 25 March 2023 (UTC)
thread_title:  Linking to German