About Parabolic Trough Solar

Trough solar systems use parabolic curved, trough shaped reflectors focus the sun's energy onto a receiver pipe running at the focus of the reflector.  Because of their parabolic shape, troughs can focus the sun at 30-60 times its normal intensity on the receiver pipe.  The concentrated energy heats a heat transfer fluid (HTF), usually oil, flowing through the pipe.  This fluid is then used to generate steam which powers a turbine that drives an electric generator.  The collectors are aligned on and east-west axis and the trough is rotated to follow the sun to maximize the suns energy input to the receiver tube.  Click flow diagram above to see full size flow diagram of the new plants beig built in Spain.  Current cost of electricity from these plants is  $0.10 to $0.12 per kWh.  The current goal of ongoing development by EERE is to reduce the cost to $0.035 to $0.043 per kWh by 2020. 

Trough collector solar power, also called solar electric generating systems (SEGS), represent the most mature concentrating solar power (CSP) technology, with 354 MW of installed capacity in nine plants, built between 1984 and 1991, all located in the Mohave desert of California.  There are several generations of plants, the newer generations incorporating features that would reduce the cost of electricity if they were new plants.  All plants are still operating and producing power for the electrical grid at 99% availability.

The technology has been stagnant since 1993, but four new projects are now being developed. 

• In the US, a 1 MW plant is being built by Arizona Public Service's at its Saguaro Power Plant and a 64 MW plant is being built in Eldorado Valley near Boulder City, NV.  Solargenix is the prime contractor on both projects in conjunction with EERE/NREL.  SHOTT North America is supplying the receivers.  The Boulder City plant is currently scheduled to go on line in Jone 2007.  Funding for the American projects has been difficult, but on 10/4/04 the Western Governors Association and EERE announced funding and support of a 1000 MW goal of concentrating solar power for the region by 2010.  Included in this program is support for the two afore mentioned projects.  Nevada Power and Sierra Pacific Power Company have signed long term contracts to buy the power produced by the 64 MW plant.
• Two identical 50 MW plants are being built by Solar Millinium AG in Granada, Spain.  The first plant has received a €5 million (~$6.25 million) grant from the EU’s Fifth Framework Program and financial support from the German Ministry for Environment.  To encourage this type of technology the Spanish government has set up regional funding programs. This is coupled with a bonus of 12 Eurocents per kWh generated from solar power has been instrumental in bringing such projects to Spain.   
• A 150 MW facility that is to be expanded to 500 MW In the Negev desert of Israel is being developed by Solel (the successor company to Luz). Solel will establish a consortium to finance and build the power station, which it estimates will cost $1 billion. The state has promised to buy the electricity under the terms of a contract to be signed by the parties.

The first solar trough plants were constructed in California by Luz International. The first started up in 1984, the last in 1991. Altogether, nine such plants were built, SEGS I–VII at Kramer junction and VIII and IX at Harper Lake and Barstow respectively.  In February 2005, all but two (I and II) of the Kramer Junction SEGS plants were acquired by FPL Energy  and Carlyle/Riverstone. A natural gas system “hybridizes” the plants and contributes up to 25% of their output, a feature that allows operation later at night or on cloudy days to meet the requirements of the grid.  FPL now runs these systems, making it the largest solar power generator in the United States.  All of the power generated from the SEGS projects is sold to Southern California Edison under long-term contracts negotiated by Luz back in the 1980s.

Development work is now proceeding on several components of the plants: 

Improvements in the structural support system have received much attention as the collector assembly is the most expensive part of the system.

• SolarGenix, the contractor for the two new American plants has developed a new structural support system for the collector.  The design uses an aluminum frame patterned after the Luz design, but superior in terms of structural properties, weight, manufacturing simplicity, corrosion resistance, manufactured cost and installation ease.  One key point of in design of the structure is that it has to have extreme tolerances and structural rigidity in order to focus the mirrors precisely on the receiver pipe.  High resistance to large wind loadings on the large structure is a very important parameter.  Solargenix used computer modeling techniques that were unavailable at the time that the original Luz design was made.  The collector assembly has been tested at the NREL test facility.  A new improved generation of reciever tubes supplied by SHOTT will be used in these plants.
• FLAGSOL Gmbh, who supplied all the collector assemblies at the California plants is supplying the trough assembly for Solar Millenium, has gone through a similar development process to develop a new steel structure.  The collector assembly has been tested at the Kramer Junction SEGS plants in California. 
• Industrial Solar Technology Company (IST) has developed a concentrator system that incorporates the reflective surface as part of the collector structure.  This results in a very lightweight, low-cost concentrator module that is also very strong. 
• Solel's solar collector assembly includes an upgraded version of the Luz parabolic collector.  It is designed for mass production and cost reduction by economies of scale.

The reflectors are composed of individual concentrator modules that are a consist of a steel support structure with a mirror mounted on it.  Development efforts are aimed at reducing the thickness of the mirror, improving the reliability of the glass to metal seal, surface coatings on the mirrors to improve their performance and development of a composite concentrator modules with lightweight, front-surface mirrors instead of heavy (4 mm) glass mirrors that were used on the original SEGS plants. 

The heat collection element (HCE) is composed of a stainless steel pipe with a glass tube surrounding it, with the space between evacuated to provide low thermal losses from the pipe.  The pipe is coated with a material that improves the absorption of solar energy.  Several improvement have been made or developments are underway to improve performance:

• Solel has supplied all the HCE's to date.  In its newest model, the UVAC 2003, they have increased the annual average performance by more than 20% over the assemblies used in the Luz plants.  Absorptivity, emissivity (radiative loss) and transmittivity (of the glass) all have been improved. 
• IST's innovations include a receiver that incorporates a highly efficient blackened nickel selective surface and an anti-reflective coating on the glass envelope. The receiver pipe surface has a high absorptance for incoming light in the visible range, and a low emittance in the infrared wavelength.
• Shott Rohrgas has announced it is planning on producing HCE's and presumably will supply them for the Spanish plant. 
• The seal between the glass and the pipe has not been as reliable as desired and development of better seal materials/seal configuration is underway. 
• The HCE was connected to the stationary hot oil piping with a flexible tube in the Luz plants. Replacing the flexible tube with a ball joint will reduce the pressure drop in the hot oil piping piping by 50% and significantly reduce the parasitic power losses in the plant.

The fluid going through the receiver pipe is routed through a thermal storage system which permits the plant to keep operating for several hours after sunset while the electrical demand is still relatively high.  The thermal storage system (to be used in Spain) is a two tank system in which the HTF flows through the solar field and then through a heat exchanger where it gives up a portion of its heat to heat a nitrate salt solution that is stored in a hot salt tank.  The slightly cooled HTF continues on to the power generation system.  At night the hot salt solution flows through the same heat exchanger heating up the HTF for generating power.  The cooler oil flows from the heat exchanger to the cold storage tank where it stays until daytime when it is reheated and returned to the hot storage tank.

Several companies are involved in developing heat transfer fluid/thermal storage systems. The leading candidate appears to be a system designed by Sandia National Laboratories.  Only a few details are available. The following is courtesy of Solarplaces:

• Sandia has tested a thermocline storage system that uses a single tank that is only marginally larger than one of the tanks in the two-tank system. A low-cost filler material, which is used to pack the single storage tank, acts as the primary thermal storage medium.
• Nexant has developed a near-term thermal storage option that uses biphenyl-diphenyl-oxide HTF in the solar field and then passes it through a heat ex-changer to heat molten salt in a thermal storage system.
• Kearney and Associates is investigating using a lower temperature molten salt as the HTF in the solar field as an innovative approach for reducing the cost of thermal storage for troughs.
• Work at the University of Alabama and NREL is looking into using a new class of fluids known as organic salts (or ionic liquids) as the HTF and thermal storage media in a parabolic trough plant. Organic salts have the primary advantage of being liquid at room temperatures

The Plataforma Solar de Almería (PSA), the European Test Center for Solar Energy Applications, in southeastern Spain is Europe's test facility for concentrating solar power development.  They are developing direct steam generation technology to eliminate the thermal oil system that is currently used in solar trough plants, which would greatly simplifies the plants.  The two-phase heat transfer that occurs in the receiver tube required evaluation as there are unique condition that occur in the tube.  Results of testing to date indicate that the heat transfer was very sensitive to the small changes in temperature that occur in solar troughs and that their measurement accuracy was not good enough to correlate the data properly.  PSA is also developing new trough collector assemblies and coatings to improve the absorption of solar energy on the receiver tubes and to decrease the reflectivity of glass.

Status of new plants:

APS' 1 MW solar trough plant at the Saguaro power plant will heat mineral oil to between 250° and 500°F, lower temperature than used in other plants.  Flowing through a heat exchanger, the heated oil will vaporize pentane, a hydrocarbon, which in turn will drive the turbine. The vapor then will condense back into liquid form and the cycle will repeat. This approach represents a departure from existing solar thermal plants, which use steam driven turbines.  The capital cost for a steam turbine would be too great for such a small plant, instead, APS will use a 1-MW turbine similar to a geothermal plant’s.

In 2004, German company Solar Millennium AG started work on two parabolic-trough solar power plants in Grenada, southern Spain. Two 50 MW solar trough power plants, AndaSol-1 and 2, are being built jointly by ACS Cobra and Solar Millennium in the region of Andalucia, with a 510,120 m² solar collector field and 6 hours of molten salt storage. Construction will start in autumn 2005 and will be completed in 2007. ACS Cobra and Solar Millennium have started development of various 50 MW follow-up plants in Southern Spain.

The $1 billion Solel plant will be built in phases, in the first phase, a 150 MW plant will be build at a cost of approximately $250 million.  The plants will incorporate a new trough Assembly incorporating their UVAC.  No starting date for construction has been announced.

Revised 11/12/05 to update data on Solergenix Bouder City plant.

Resources:

ACS Cobra, Madrid, Spain
Flagsol Gmgh, Koln, Germany
Solargenix Energy LLC, Raleigh, NC
Solar Millennium AG, Erlangen Germany
Solel Solar Systems LTD, Beit-Shermesh, Israel
"Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts", Executive Summary (47 pages), Full Report (344 pages), Sargent and Lundy LLC, October 2003
"Parabolic Trough Systems", EERE 
Plataforma Solar de Almería, European Test Center for Solar Energy Applications, Tabernas Desert, Spain
"2 x 50 MW AndaSol Power Plant Projects in Spain", SolarPACES

Technocrati tags: solar power, renewable energy, solar trough collectors, solar storage systems

Comments

[steve]

ROB you may want to check out www.solel.com for some more information. It does not have everything but does have some interesting information.

[nitesh]

hello sir
i am a engineering student and doing a project on solar parabolic dish collector to dissociate water in to h2 and o2 . can any body help me on to how to proceed with any comments , links , materials will be welcome . i want total details starting from cost , material to be used , calculating area , size ..
mail me at niteshdadha@gmail.com

thanks for ur precious time.

[Tom S.]

How much residual heat does the system have after running the turbin?

Has the system been tested in colder climates>

[GOPAL SOMANI]

Hello my friend,

The writer of this mail is G L Somani deeply associated with development of 140 MW ISCC Solar Power Plant at Mathania, in India since 1999.(GEF Grant supported with kfw finance to GOI)
I remained in contact with GEF and kfw officials including Solel, DLR, BHEL, L&T,and Fichtner Solar,Solar paces etc.including visits to SEG in Mojave Deasert and DLR facilities in Spain and participating in international workshops held in Palmsprings , Bonn and Spain in this connection.
The project faced with problem of long term availability of affordable LNG and cost involved in laying 350km long pipe line to source lNG and proven technology for Solar integration with combined cycle operation on LNG as fuel.The status therefore is uncertain.The bidding process failed because of Guarantee requirement for satisfactory operation in ISCC mode.
I am aware with recent developments taken place on 64 MW Solar Project at Naveda and 50 MW Projects at Andasol with Solar Storage backup to ensure contineous availability of power during non solar period.This apart the advancement in technology and improved efficiencies in Solar collectors, Heat Collecting Electrodes and Solar Thermal Storage , the possibility are now sure that Mathania can become reality for implementatation purely on Solar mode with 50 - 60MW capacity.
I understand that GEF,kfw and Govt. institutions in India are still interested and might decide to continue the support to implement the project looking to the techno economic feasibility in recent development and future trend.
I would like welcome the suggestions so that we may work out plan ahead.
What I need is to convince the stakeholders with cost of major equipments in recent past , performance level cost economics, efficiencies, status of technolgy of major Solar Equipments, Thermal Storage and components with future trends.
Details of Mathania Project's feasibility study, the principal and key site data with all technical parameters including Conceptual Design Data are available with us, it will be possible for some one to give us a path way to proceed.
I will wait for the response.
Thanks,

Sincerely yours,
GOPAL SOMANI
Managing Director
ZDRiVE Software Pvt. Ltd.
B - 17 INDRAPURI,
Lalkothi Scheme,
Jaipur-15
Phone 91 141 2742819 / 2740218 (O)
91 9414113199 (M)
e mail; somani_gopallal@yahoo.co.in

[steve]

There are no current systems in the United States that use thermal storage. My understanding is that the new plant, that is supposed to be built in Gila Bend, will and the new plant that will be built by FPL will not. There are some projects being built now in Spain that are going to use it and it will be interesting to see how they turn out. There is at least one American company in Spain right now building solar projects and I know they are very interested in the technology.

Now I am not sure about your needs but even if you have thermal storage, we are a very long ways from being able to run 24/7 on it. About the most you can expect is to be able to extend your day or adjust your load to peak times. If I were you I would contact some of the Spanish companies (I can’t think of the names right now) or maybe a company called Brightsource. They built the original Segs project and have some damn fine engineers working for them.

[Tracy Lidar]

May I have permission to use your pictures for an school project. Tracy

[SATISH MAHAKAL]

Dear sir ,
I want detailed information about deigning of parabolic trough solar power plant.Different types of material of trough,Method of calculating temperature in receiver tube.

[fireofenergy]

Got your page from "cost of parabolic troughs" on Google...
This is what I think about solar troughs (or any other concentrating system)... I was writing to those who don't believe in GW or post oil crisis...

"There is a Point Of No Return as to when it will be physically impossible to cover the deserts with the solar concentrators necessary to both generate unlimited juice (storage willing) and reverse the albedo affect that is helping the glaciers to melt by reflecting the sky back into space (dark solar panels could overheat the planet).
It is proven that gas prices are rising for the intent to get rich, call it China hogg'in (we did it, too!), And it is proven that mirrors are the best way for solar (CPV and CSP). So why not get together NOW and MANDATE 10,000 SQUARE MILES OF DESERT to be used for simple post mounted solar structures! Imagine the jobs, imagine the future...

10,000 - 7,000 sq mi for inbetween and spread about space (and for preserving habitat) = 3,000 sq mi * .2 (for 20% effic) = 600 sq mi of 100% converted sunlight (or 16,727,000,000 sq ft) * 0.08 kilowatts per sq ft (1,000 w/sq meter at best). = 1,338 Terawatt capacity * .25 = capacity (for clouds and night) = 334 billion watt capacity * 8,760 (hours in year) = 2,930 billion kWh / 12,000 (average as noted by CA energy commission)...

Equals enough juice for 244 million (average) homes!!!

2/5th of the mohave desert would provide TWICE this much. At $2 per installed watt, this (2X figure) would cost a lot... 5.352 trillion payable as we go (financing is impossible) = $4.66 per day per household (not business, not industry, not per person). Obviously, everyone will have to pay including industry in the form of carbon tax and/or other fees and taxes. Oh well, (I say cut 75% of the "secure our oil" war funds).

Ya, about one pack of cigarettes for just one person in the house! Figure a pack and a half with other associated costs like powerlines and storage... untill competition drives the component costs down (in relation to higher inflation).

Now, let's consider the real costs of not doing this... UH we run out of gas and die... like duh!"

I really hope that these things start to expontiate at least to a point where we don't have to worry about oil depletion and GW

[ravi nigam]

sir,
i am student from NITK,surathkal,INDIA,working on a project relating industrial dryers, to dry moist solids. conventially we use any fuel to heat the air to be used in the dryer.I was wondering about using these parabolic troughs to trap solar energy to heat the air to be used.
is it possible to do so..??
expecting an early reply.
thankyou
popping10corns@gmail.com

[Aung]

Dear Sir,

I would like to use the parabolic trough for student research. Where can I get the contact address to purchase it? If you know the manufacturer, let me know.

Thank you,
Aung

[Kaushal Shah]

Hi, I am researching solar thermal power generation issues in India. I am just a novice in this field. Could you tell me whether, one needs a heating storage facility, even if he wants to make a feed-in plant?

[Alberto Valdes]

I´d like to know how interesting could be for a reliable company to build a 100 kW PTC in Northern Mexico. 100 KW is certainly a little plant thinking in generating terms, but it could have a great value in thinking of technology reliability.

I hope this blog keep active

Regards

Alberto Valdes

[Nguyen Quoc Long]

Dear Sir,

I am a university teacher and I am studying the since and engineering of materials. I would like to know, how can you designed a ABSORPTIVE RERIGERATOR USING SOLAR ENERGY (CaCl2/NH3)
I apreciate your help on this subject. Thank you sir.

[Long Quoc Nguyen]

Dear Sir,
I am desinging a on solar ice maker using CaCl2 absorber and NH3 as a refrigerent. I am confused how to fill up CaCl2 in the receiver of the Parabolic trough collector. Is there any more constituent than CaCl2 in the receiver?

[engin]

good day,
I m looking for any program for that ı can use for desing parabolic trough power plant(or calculete for home work) thanks everybody... (sory for my english :))

[A. M. Eltahir]

I'm a post graduate student in this field. I want to know is it posible to generate elictrical power by a parabolic trough collector without evacuated tube

A M Eltahir
Khartoum Sudan

[Saamson Raymonds]

We offer concept - to - commissioning solutions for Solar Thermal Power Plant using parabolic trough concentrator. We are open to new assignments and would invite interested entities to please contact us for setting up solar thermal power plants.

[Malu group of industries]

The company has a vision for solar power potential and intends to erect and commission solar power plants. The commercial viability is being assessed by the company.

As we have chosen to go into the avenues of grid connected power generation
(With solar thermal electric technology) by use of concentrating solar power & with thermal storage systems. Namely,
(a)Parabolic trough system (b) Power tower system (c) Parabolic dish system.

The company precisely at the juncture looks forward for you to contribute in literature review & preparation of Project report and transfer of technology/technical tie-up for techno-economical feasibility at our end to suit Indian conditions.

The project report for each of the capacity referred to in the subject expects:

1) Literature review.
2) Selection of best suited technology for each case.
3) Detail working drawings for commercial production.
4) Cost analysis.
5) Comparison viz a viz other type of conventional & renewable power sources.
6) Literature for earning carbon credits.
7) Information about any other financial assistance available from dept. of Science & Technology as a member of KPYTO PROTOCOL OR OTHER WISE.
8) International financial assistance & credits.

We sincerely look forward for your early reply in affirmation.
Hoping for your fullest cooperation in our new missionary ventures.

Thanking you,
Sincerely Yours

Malu Group Of Industries.

[Malu group of industries]

Our company has a vision for solar power generation and intends to erect and commission solar power plants. The commercial viability is being assessed by the company.

As we have chosen to go into the avenues of grid connected power generation
(With solar thermal electric technology) by use of concentrating solar power & with thermal storage systems. Namely,
(a)Parabolic trough system (b) Power tower system (c) Parabolic dish system.

The company precisely at the juncture looks forward for you to contribute in literature review & preparation of Project report and transfer of technology/technical tie-up for techno-economical feasibility at our end to suit Indian conditions.

The project report for each of the capacity referred to in the subject expects:

1) Literature review.
2) Selection of best suited technology for each case.
3) Detail working drawings for commercial production.
4) Cost analysis.
5) Comparison viz a viz other type of conventional & renewable power sources.
6) Literature for earning carbon credits.
7) Information about any other financial assistance available from dept. of Science & Technology as a member of KPYTO PROTOCOL OR OTHER WISE.
8) International financial assistance & credits.

We sincerely look forward for your early reply in affirmation.
Hoping for your fullest cooperation in our new missionary ventures.

Thanking you,
Sincerely Yours

Malu Group Of Industries.

[BRIGHT ENERGY]

We are the Bright Energy from India originally from Gujarat; we are dealing in the business of the solar products since five years. I am thinking to start that steam cooker project in India. For that I have all the necessary thing which I will needed except the glass tube receivers.

[PAUL GERMANN]

WHERE CAN I BUY FLEXIBLE REFLECTIVE MATERIAL
TO CONSTRUCT A SOLAR PARABOLIC TROUGH WATER HEATER. THANKS, PG

[azuredu]

There is a home version of parabolic troughs: redressable parabolic trough. Usable in homes, for heat and electricity cogeneration.

[Pete in Central Va.]

Greetings
I have procured some highly polished sheet stainless from a scrapyard and am looking forward to building a few square meters of trough to experiment with as well as to supplement some of our heat/energy consumption at home. I am looking for some good quality pics of the rack's that are used to hold the parabola in shape, so i can begin collecting parts to fabricate frames for my mini-trough's. I downloaded a freeware program to calculate a parabola for a given width/focal point. Any and all pics/details appreciated. Also, any ideas/info sources for micro steam turbines is food for the future too..
Thanks
Pete in central Va.

[bhumesh patle]

dear sir i am student of master of engg. i am doing project on finite element analysis of parabolic solar plate collector.so plese guide me

[Abdulaziz]

thank you very much for the nice introudction of the Parabolic trough system .But i have a Quistion how can i generat 5kw of enyrgy useing Parabolic trough system to power a normal houce
thank you very much
Abdulaziz

[Paresh]

the website is an absolute marvel. but it'd have been more interisting wid some more pics of recent developments in solar-thermal engines.

[hamed]

Sincere greetings:
Thank you for effort in those researches which it is service for humanity. I hope that I will be the beneficiary from you great researches and to transfer this technology to my country.
We need to get:
1- Licensing agreement.
2- Technology transfer.
3- Development solar technology.
4- Tech training .
My Address is:
203 climbing ivy ct
Cary, NC , 27511

[Mia]

This really helped me on my science project.
Thank You!

[solar energy]

Trough collector solar power is also an effective solar power provider system.

[nhlahla]

hi.. is there anyone who can help me with Solar turbo generator calculations and material selection. my email address is mbuyazi.nhlahla@gmail.com

[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.

[lupin]

Hello,
I'm working on a green house project. I'm really interested by this parabolic trough collector technolgy and I really would like to know if it's reliable for single housing application.
thanks a lot,
Claire

[writing up dissertation]

Blogs are good for every one where we get lots of information for any topics nice job keep it up !!!

[chandu.das]

iam from india.i am a student iwant to make a still model of this power plant

[thomas]

Printing is possible, click file (on your browser) then click print or print preview. And then print. Or you can use a screen capture program which would be free at download.com or other site.

Solar really is the best technology in the world. We should stop making cars this year, and start making solar trough collectors, to reach my goal of 100 percent renewables today.

[yoones]

Hi.Im studingin Ms in Energy Engiering and i have poroject and need your help.can you send pdf & pps files to me about solar Parabolic Trough power plant ?

[Muhammad Sharique]

sir I am a undergraduate student ans i have given a thesis topic on "concentrated Solar Power Plant". I want help. please send me the related material about this topic. my id is msharique_saz1@hotmail.com.

[Alok Mathur]

Hello,
Thanks for very informative article.
I am at Rajasthan, India, having high solar radiation levels. We have a large water reservoir of about 200000 sq. meters area and 5 meter depth.
I want to know, if solar parabolic troughs can be placed over water reservoir for installing a solar power plant of about 15 MW.
Also, if solar PV cells can be installed with solar parabolic troughs?

[Vikas Singh]

Hi I am a power Engineer. Am looking for Technology solutions for a Solar power plant in India. Can you please provide some information. We have our own turbine we need steam generator based on solar. Please help
Thanks

[Joe Thompson]

I am currently a writing a research paper on parabolic troughs and was wondering weather you could help me with a few questions I have with regards to the materials used on this tecnology?

Would it be at all possible for you to supply me with the different reflective materials used on the troughs and also the reflective efficiency of the material?

Also, what are the advantages and disadvatages of each of the reflective materials, i.e costing, weight.

Please do not hesistate in contacting me on: jthompsonzing@yahoo.co.uk

Any help is a great help, thank you for your time.

Joe

[Saamson Raymonds]

We offer `CONCEPT - to - COMMISSIONING` services on a consultancy basis and turnkey basis , for solar themal power plants.

Those interested please call: 09371029563 or email: shimshonenergy@gmail.com

[brp bhat]

we are manufacturers of parabolic trough in bangalore india.any one interested may contact us at-airier natura pvt. ltd.
airierindia@airier.com

[oilcoolerindia]

Panel coolers Manufacturers, Cooling Towers Manufacturers, Radiators Manufacturers, Air blast oil coolers Manufacturers, Water chillers Manufacturers, Heat Exchangers Manufacturers

[Husky air compressor]

I'm working on a green house project. I'm really interested by this parabolic trough collector technolgy and I really would like to know if it's reliable for single housing application.
thanks a lot!
Husky air compressor

[Husky air compressor]

I'm working on a green house project. I'm really interested by this parabolic trough collector technolgy and I really would like to know if it's reliable for single housing application.

[amol]

hello, I am looking for ms fabrication CVT and IVT tank manufacturer in maharashtra.
please help me if any haves idea about it.

[Rina Friedman]

SOLAR ENERGY – I DID IT ALL ALON AND SUCCSEDED! This is my personal experience and I want to share it with you all

In times of unstable financial situation, a wind turbine and a solar panel can help us save money on energy consumption and also keep the environment pollution free. We can actually save up to 80% of the energy consumption.
This free energy can be easily generated from natural resources.
There is no need to invest on any other commercially made home power generator – you have the option to actually build one yourself.
Fewer units are needed to transform these resources to free energy. To create a solar and wind turbine at home you can use junk or parts that are readily available in local stores.
As we have the ability to generate free energy from natural resources, so why pay the electric company for energy consumption? Learn to build a homemade power generator, such as solar panels and wind turbines on a tight budget by following the instructions that shows you how to do that with detailed, step by step. You shouldn't depend entirely on the information downloaded for free on Internet, because if you make one mistake - the whole project may be ruined. I used a great guide and it was easy – now I have panels on my roof and free electricity!!
I suggest you follow the instructions carefully as they are written by professional ecologists, who guide you with certainty.
The program includes simple step-by-step instructions guide, all of which can be easily followed by anyone. The kit contains the procedure to find all the necessary parts and put them together. All this can be done for less than $ 200 rather than trade is one that cost less than $ 1000
Go to my web site and read what I have to say:
http://free-energy4u.com

[Thom Johnson]

What is the advantage of using these solar panel fields in producing electricity? Could we produce the same amount of electricity with a community roof top design.

[Affordable literature review]

well your work is pretty good and i really like your post . .every thing in the post is awesome . . . .gr8 job . . .keep sharing :)

[Fly 100 Honda]

Girls always look on themselves as proud princesses, with the exception of a small number of either extremely ugly or exceedingly smart ones.