[Greenbuilding] Repurposing dried up tube/bore wells for geothermal cooling

[John Salmen]

That type of boring is essentially an ‘uncapped’ well which is also the cause of having aquifiers contaminated – and a global issue but that’s another issue.

 

Geothermal cooling is not a renewable – it uses electricity (heat pump fans and compressors) and not the same as a passive cooling chimney – either up or downdraft. An existing well could be used for geothermal with circulating water pipes. It could possibly be used as an air inlet in a passive or solar chimney design but would typically require another shaft as an outlet into the building – (you have to draw air into the shaft as well as out of the shaft)  -  and having both open holes takes us back to the contamination issue.

 

Water or some liquid could be drawn into and out of the hole which would be cooled but again a pump is required to maintain that circulation.

 

Passive methods can be effective but often more in perceived comfort (air movement) as actual temperature changes are in the 1degC. Think of the volume of air needed to create an air change in a building.

 

The building itself in design is a chimney that can be utilized and something as simple as lower awning windows will direct cool air from the ground as it rises against a warm building exterior wall. 

 

John

 

 

From: Greenbuilding [mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of Norbert Senf
Sent: Thursday, July 13, 2017 4:56 PM
To: Green Building
Subject: Re: [Greenbuilding] Repurposing dried up tube/bore wells for geothermal cooling

 

Not familiar with the particular details of that system. However, if there was a chimney or a tall house was used like a chimney for exhaust, it would have to be warmer inside the house than outside, in order for the house air to have any buoyancy.

 

On Thu, Jul 13, 2017 at 7:12 PM, Stephen Collette <stephen at yourhealthyhouse.ca> wrote:

Hi Sanjay and all,

 

I have a slide or two somewhere of a very old design used in Iraq if I remember correctly. it was using such a system, where there was an outdoor bore as well, and a nice chimney in the house, or tall house. The idea is that air would be pulled into the house after passing across the aquifer, cooling and adding a bit of moisture to the house in hot hot summer. A brilliant idea using stack effect to pull cool air into the building and through it. 

 

Some of them really old folks knew what they were doing, long before we had an equation for it.

 

Stephen

 

Stephen Collette 

BBEC, BBNC, LEED AP, CAHP, BSSO

Your Healthy House - Indoor Environmental Testing & Building Consulting

http://www.yourhealthyhouse.ca

stephen at yourhealthyhouse.ca

705.652.5159 <tel:(705)%20652-5159> 

 

 

 

On Jul 13, 2017, at 2:00 PM, greenbuilding-request at lists.bioenergylists.org wrote:

 

Subject: Repurposing dried up tube/bore wells for geothermal cooling
Message-ID: < <mailto:1219722284.4244024.1499957169765 at mail.yahoo.com> 1219722284.4244024.1499957169765 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Hi all,
Many homes in India have dried up ?tube wells. They are use for household water supply as the city supply is often insufficient and unreliable. When a bore dries up due to the water table falling, people often drill new deeper ones, leaving the old bore unused. And now Rajasthan has banned new borings, so we can expect many more to be available soon.
Let's say someone is trying to cool their 1000 sq ft home, from 100+ degrees to 75 degrees. What is the feasibility of using, 3 inch diameter, 200 foot bore for geothermal cooling?
Can this be done with simple circulation, or would it require a heat pump? If it's possible at all.
~sanjay
?

 


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-- 

Norbert Senf
Masonry Stove Builders
25 Brouse Road, RR 5
Shawville Québec J0X 2Y0
819.647.5092
www.heatkit.com

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