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October 20, 2007


Tony Belding

If they can't manage anything larger than a 5 MW plant, it's going to take a huge number of such plants to displace fossil fuels on a large scale. 500 MW to 1000 MW coal-fired plants aren't unusual.


True. But I am heartened to find out the energy is there and commercially extractable.


Even if the plants are small, they could put in plenty of them.  Imagine a 1 MW plant which (because it has no emissions and can be sited among dwellings) doubles as a supply of district heat.


That was my first thought 4-5MW, a drop in the bucket. I doubt they will build thousands. Hopefully scaling to larger sizes can be done.


I imagine that the major cost will be the hole. Once the hole is built, the only other cost is the heat exchanger, something else that with proper care and maintenance, will last for a very long time. The pay back at current rates may be a long one but the energy is free and this power source could just sit there and churn out earnings for hundreds of years.

A real blue chip investment.


Leo, do the holes and other plumbing really have a long lifetime? I can imagine all sorts of desolved minerals which tend to deposit as the fluid temperature drops. Periodic replacement of many parts would be the result. Ongoing maintainance may be a substantial expense.

Jim Holm

After a few years geothermal wells tend to cool down the space around them and, depending on the insulating properties of the rock, put out much less heat long-term. The bigger the well, the bigger the cool-down.

Harvey D

Jim Holm;

Could a geothernal power plant use multiple smaller holes fair close together (but not too close) to enlarge the area and to slow down the deep underground cooling effect?

Could holes of various depth also help?


The problem with that is drilling holes costs money (and energy).

One of the things I covered at Clean Tech 2007 was an advance in organic vapor turbines by United Technologies.  They have a 225 kW turbine which can operate from very low-temperature geothermal heat (if supplied with a cool enough heat sink).  If the atmosphere can supply a heat sink at less than 40°F (~5 C), then a heat source at 75 C will suffice.  That same heat source is sufficient to supply both space heat and DHW, so the essentials are all there.


Geothermal plants don't have fuel logistics issues and a very small footprint, so distributed generation will be easier.

Pulverized coal is difficult to decentralize because it doesn't transport well in a decentralized manner. Which is why they cannot be small, and because of economies of scale, they have to be big anyway.

I seriously doubt that several hundred times Germany's current annual electric consumption worth of geothermal generation would be sustainable in terms of heat flux, no matter how the holes are drilled or the wells are managed.


There is another option for geothermal's future potential: offshore.

Take a look at this US geothermal map. Notice the best resource is off the shore off the northwest. A nice sweet spot near the fault line in the Gulf of California as well.

It makes sense: the crust of the ocean floor is much thinner than the continental plate crust, which usually amplifies geothermal potential in geologically active areas.

It probably will not be commercialized anytime soon, but offshore geothermal certainly deserves more attention as a long term energy option.

Maybe when offshore oil production starts to decline, some of the oil rigs can be converted to geothermal generation stations. Since most of the equipment needed is already there.


Europe Energised-----will lights go out in 2050?



used bucket trucks

The construction field always has it ups and downs and is always changing but progress will never stop.Even in a questionable economy there is always room for growth and expansion. The will and strength of the people is what makes us all able to move forward and accomplish great feats together. and construction has always been the backbone of this country no matter the economic status.

oilfield equipment

i agree with the last comment. we need to stay strong and keep our heads up.

crane trucks

It is great that people are thinking about the environment and working to make the world a safer place. Not only the materials that you are using on your home are safe for the environment but dump trucks have come a long way since the earlier models. We are learning and expanding and coming up with a wide range of safer more effective vehicles for the work force. I think it is great that many auto manufacturers are turning to hybrid vehicles to protect the environment and now they are even using hybrid dump trucks.

Hp Pavilion DV4000 battery

it is very great,maybe very usefull to our environment
(Hp dv4000 battery) , Hp Pavilion ZE2000 battery


That is a great use of geothermal energy. A perfect example of how geothermal can be used for more than just heating and cooling a home.

wood chipper

Thanks for this article! Very informative!!

Dr. Walid Amin Ruwayha

From : Dr. Walid Amin RUWAYHA / Owner - Ruwayha TOURISM VILLAGE
E-mail : ruwayhawalid@free.fr / Website : www.ruwayha.com
Google Map : http://www.ruwayha.com/google_earth.html
Tel. : 00-33 -(0)1-47 27 30 67
Mr. Giselher SCHLEBUSCH / Consultant : Over thirty years, member of Board (AHK) French-German Chamber of Commerce in Paris / E-mail : g.schlebusch@orange.fr
Tel. : 00-33-(0)1- 45 75 51 51

Object : Wir streben ein Partenariat in Form von joint-venture und/oder B.O.T. mit Firmen an, die über den Libanon hinaus auch in andere arabische Märkte eindringen möchten.

Sehr geehrte Damen und Herren,

Information über die Errichtung einer
Modellstation für erneurbare Energien im Libanon

In Zusammenarbeit zwischen Dr. Walid Amin Ruwayha, Präsident von ’Ruwayha Tourism Village’, und Giselher Schlebusch, 30 Jahre lang in der in der Geschäftsführung der Deutsch-Französichen Industrie-und Handelskammer tätig, gehört zu den Mitbegründern und Präsidenten des ‘Deutsch-Französischen Afrika-AsienKommittees.’

Deutschen Firmen, die im Bereich der erneubaren Energien tätig sind, soll auf dem Gelände von ‘RTV’ die Möglichkeit gegeben werden, dauerhaft ihre Produkte und ihr know-how vorzustellen. Wir streben ein Partenariat in Form von joint-venture und/oder B.O.T. mit Firmen an, die über den Libanon hinaus auch in andere arabische Märkte eindringen möchten.

Die politischen Ereignisse im Libanon festigen unsure Überzeugung, dass das Land auf dem richtigen Weg ist, seine frühere hervorragende Stellung im Nahen Osten wiederzuerlangen.

Noch für disen Sommer ist eine Studienreise zu ‘RTV’ geplant.



Ruwayha TOURISM VILLAGE (RTV) is a, privately owned (RUWAYHA family), multi-million U.S.D project located in the heart of Al-Matin mountains, known as Valley LAMARTINE, at a distance of (23) Km from Beirut, with easy access from all direction and extensive parking space.

RTV extends over (72.000) square meters of land. It is divide into two parcels : (1) The “Upper Parcel” (37 000) square meters, and (2) The “Lower Parcel” (35 000) square meters.

RTV with seven years of working experience, represents an investment, until now, of over TWENTY MILLION (20 000 000) U.S.D. The final, total investment, will exceed TWO HUNDRED (200 000 000) U.S.D.

The recent rebirth of Lebanon testifies and imposes a recognition as being an international hub for trade, finance, investment, services and tourism. Free enterprise and private initiative are the drivers of the Lebanese economy, based on a long tradition of liberal investment policies. Trading facilities, banking and financial services make Lebanon the commercial center of the region.

At the center of the Eastern Mediterranean, Lebanon is uniquely situated at the crossroads of Africa, Asia and Europe. It’s free-market investment policies, liberal economic environment and active entrepreneurial private section distinguish it from any other country in the region.

Ruwayha TOURISM VILLAGE accent-projects are :

I. EURO-MEDITERRANEAN-COMMERCIAL-CULTURAL & MUSICAL EXHIBITION (EM-CUM) which will be held each summer (August 10th - 25th ).

EM-CUM is designed to be the ideal promoting-platform for local and foreign companies and/or governments doing business in the Middle East and seeking a SUMMER OUT-DOOR business exposure to exclusive and sophisticated regional, especially Gulf countries, buyers and/or decision makers.

European economic presence in Lebanon is unjustified & is not in conformity and harmony in comparison with the scale of Europe’s international political & economic strength and presence.

We aim to establish contact with international foreign organizations, chambers of commerce, companies, etc …, in order to encourage them to do business and to open branches and/or factories in Lebanon. We consider that Lebanon is Europe’s pedestal and gateway to Africa & the Middle East.

II. INSTITUT SOURCE DE JOUVENCE : To be the ONLY of its kind in the Middle East aiming to serving the Middle-Eastern & foreign )populations.

« Il s’agit d’un centre qui prend en charge la rééducation des patients dans 4 types de pathologies principales : Cardiaque et vascular / Respiratoire / Métabolique et Obésité / Rééducation fonctionnelle / & Les Résidences de retraite Privées avec Services.« 

III. LEBANESE DIASPORA SUMMER-CAMPING : Concept through which Lebanese expatriate families living in Europe, when coming to Lebanon, will help improve Euro-Lebanese business and cultural relations.

IV. AL-JABAL MUSIC & SONG FESTIVAL : Similar to Baalbek & Biet El-Dine Festivals and under the direction of my good friend and our famous Lebanese artist, Mr. Gassan AL-RAHBANI, with whom RTV has concluded an agreement.

AL-JABAL MUSIC & SONG FESTIVAL will be part of the total Exhibition package. Different Artists, Orchestras & Singers will bring an added value and blend to our Exhibition.

V. RENEWABLE ENERGIES PERMANENT EXHIBITION (REPE) : We believe that Renewable Energies are much more than wind energy or photovoltaic parks injecting electricity in the grid. Domestic economy must also get a profit of its use.

We are interested in joint-ventures and/or BOT agreements with qualified and established manufacturers in the field of renewable energies aiming to create, with us, a permanent large-scale exhibition and manufacture showcase for the Middle East.

Looking forward to hearing from you, I remain,

Best regards,

Dr. Walid Ruwayha

Theodore Sumrall

The ultimate goal should be the "PC of Energy". I remember when the main frame of my company would go out periodically. I could do nothing on the computer until it was fixed. Then the desktops came out (AKA Distributed Computing). The same thing needs to happen with energy distribution. A large number of small power plants supplying the needs of small communities (and large) is much better than a dozen or so large power plants. They are much less vulnerable to terrorist attack (either direct or through the internet) and the power generated can run down the lines which go down any 4 lane road (i.e. 120kV lines).

Theodore Sumrall

Not many people realize it, but Germany has historic volcanic activity. Wiki lists 22 dormant or extinct volcanos. So, the heat is there.

Used Bucket Trucks for Sale

This is a really creative idea for alternative energy. Unfortunately, this is something that is better left to smarter people than me. If there is ever a way for the internet to be involved, search in particular, then I might be able to help. haha. Really cool idea though.


I really think there is a feasible way to use this as a form of alternative energy. Technology will have to evolve to make it cost effective and efficient, though.

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