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Renewable Energy Group

This group is for learning and sharing all information about renewable energy - Solar Power, Wind Power, Alternative fuels & Transportation....

Location: California
Members: 17
Latest Activity: Oct 30, 2011

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Solar Wind

Discussion Forum

Enhanced GeoThermal Systems

What does everyone think of this type of energy and technology?   Continue

Started by Dandarius Oct 30, 2011.

Energy - The Number One Issue 4 Replies

We thought we would start the first discussion in this group with some thoughts about the issues that face us not just in regards to peak oil and fossil fuel.  Let's talk about energy in general -…Continue

Tags: Energy

Started by Dandarius. Last reply by Evan Spurrell Apr 10, 2011.

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Comment by Dandarius on October 29, 2011 at 12:12am

Check out what Google is backing - Enhanced Geothermal Systems

 

EGS: What is an Enhanced Geothermal System?

Geothermal PlantAn Enhanced Geothermal System (EGS) is an engineered subsurface heat exchanger designed to either extract geothermal energy under circumstances in which conventional geothermal production is uneconomic, or to improve and potentially expand the production operations so that they become more economic. Most commonly, EGS is needed in cases where the reservoir is hot but permeability is low. In such systems, permeability may be enhanced by inducing slippage along preexisting fractures (often called hydroshearing) or by hydraulic fracturing, using high-rate water injections, and/or chemical stimulation, or a combination of both. In some cases very little pressure is needed to cause a permeability increase, in others high pressure may be needed. It depends on the in-situ fracture patterns, stress magnitudes/orientations and rock strength. Once the permeability has been increased, production can be sustained by injecting water (supplemented as necessary from external sources) into injection wells and circulating water through the newly created permeability, where it is heated as it travels to the production wells. As the circulating water cools, the engineered fractures, induced seismicity, and chemical dissolution of minerals may also create new permeability, continually expanding the reservoir and exposing more heat to be mined.

Comment by Fred Klammt on May 1, 2011 at 6:43pm
Hi Mary:  For solar cooking - I bought a  'kids cocoon' chair  from Ikea once (it's round and parabolic shaped) for $4...  glued a $1 car sun shade reflector inside it and put a black 1 qt pan in the bottom... it boils water in about 20 minutes - in the summer time.  Solar cooking is a real niche area....  making your own as the books Samantha references and various internet links - like you tube and http://www.cookwiththesun.com/solar.htm  are plentiful.  Above all - have FUN!
Comment by mary rose on May 1, 2011 at 10:58am
This is wonderful information to have, particularly interested in that posted by Samantha as i am try to get info like this into our Community Center here for distribution to our small community of about 750 people.  Thanks everyone.
Comment by Fred Klammt on May 1, 2011 at 7:08am

Lo-Cost DIY solar

I've discovered it costs 70%+  less $ to put in your own simple solar  HW or PV system without following the bureaucratic and corporate utility-driven CSI (California Solar initiative) rules.  The only catch is you need to provide your own labor or find somebody else to install it properly. 

 

Here's a couple examples from my presentations on lo-cost energy:

 

Lo-Cost DIY Solar Hot Water Drainback System

  • 2 Absorber Plates (wholesale- El Cajon) $530.//DC Variable pump (Hartnell)$180.// Reservoir tank$  50.//Copper Piping + Fittings $100.//∆T controller + Wiring.$140.//Misc (Framing, used Patio Door Glass $200.                                     
  •  ~TOTAL $1,200.// minus 30% Fed Tax Credit on equipment  $360.// 
  • ~ net total cost $840.

 Lo-Cost DIY  Solar PV Stand-alone System

  • 2 Collectors (270Watt) $750.//Controller $  56.// Inverter $860.//Battery (2) (optional) $290.//Monitor (optional).$140.//Wiring, shunt, Misc $200.
  • ~TOTAL$2,296.// minus 30% Fed Tax Credit on equipment $ 688.80.
  • ~ net total cost  $1,607.
Comment by David Eggleton on April 9, 2011 at 4:45am

Reduction of energy use is a closely related option, which, of course, may also be imposed (on more and more entities).  Here's information about an opportunity, called the Thousand Home Challenge, to contribute your perspectives on the process and its outcomes.

Comment by Dandarius on October 7, 2010 at 11:48pm
Thanks for the link - we are going to try to post it on the main page so that folks can easily find it. It falls under the 'primary resource' list for sure :-) Hmmm...maybe we will create a page on the main bar with that title....

Cheers!
Comment by Samantha on October 7, 2010 at 1:49pm
While I was searching, lo and behold, I found a compendium of solar cooker plans here:

http://solarcooking.org/plans/

something for everyone here...great resource!
Comment by Samantha on October 7, 2010 at 1:38pm
I just realized some stuff is on another computer, so I'll have to crank it up and search. Meanwhile, I did find this in the list of recommended books from SEI. Prices may have changed, because it's a few years old, but then, check Amazon...

Solar Cooking

Cooking with the Sun, Beth & Dan Halacy, Morning Sun Press, CA, 1992.

How to use the sun's energy to cook food, including detailed plans to build a solar oven. Available from Solar Energy International. $8

Heaven's Flame, Joseph Radabaugh, Home Power, 1991.

Complete instructions on how to build the SunStar solar cooker plus a discussion of numerous solar cooker designs. Available from Home Power Magazine, PO Box 520, Ashland, OR 97520. (916) 475-3179. $10

The Expanding World of Solar Box Cookers, Barbara Kerr, 1991.

The history and theory behind solar cooking, along with plans and instructions for building and using a solar box cooker. Available from Kerr-Cole Solar Box Cookers, PO Box 576, Taylor, AZ 85939. $10
Comment by Samantha on October 7, 2010 at 1:32pm
Hi everyone,

I'll dig up my directions and post. Thanks for responding.

Light and Peace,

S.
Comment by Judith Newton on October 7, 2010 at 12:13pm
I'd love the info, too. I have a Sun Oven (made black beans in mine yesterday) and I use my car for a solar dryer... it works great in our dry, warm summers! A solar sauna sounds wonderful, too.
 

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Yuri Smirnov posted a blog post

Spring comes to Russia!

Spring time - the nature is awakenning in Krasnodar region. ))) We had a wonderful and inspiring journey to dolmens and ecovillage of Kin's domains. See some photos here: https://www.flickr.com/photos/spaceoflove/sets/72157651562843709/See More
Sunday
Victoria Armigo updated an event
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"What's on Your Plate?" film screening at Sunnyvale Public Library on Thurs. 4/23/15 6-9p at Sunnyvale Public Library

April 23, 2015 from 6pm to 9pm
Films of Vision and Hope comes to the Sunnyvale Public Library. You are invited to join us at the library for the screening of "What's on Your Plate?" on Thursday 4/23/2015 from 6 - 9p. What's on Your Plate is filmed over the course of one year and follows two eleven year old multi-racial city kids Sadie and Safiyah as they explore their place in the food chain.  Sadie and Safiyah take a close look at food systems in New York City and its surrounding areas. With the camera as their companion,…See More
Apr 18
Victoria Armigo posted an event

Fourth Friday/Films of Vision and Hope "Just Eat It" 4/24/2015 7:15p in Palo Alto at Unitarian Universalist Church of Palo Alto - UUCPA

April 24, 2015 from 7:15pm to 9pm
Fourth Friday/Films of Vision and HopeJust Eat ItA food waste movieWinner of numerous awards, including Audience Choice at the 2014 Hot Docs Film Festival.“Hugely entertaining… will leave audiences gobsmacked.” - Variety We all love food. As a society, we devour countless cooking shows, culinary magazines and foodie blogs. So how could we possibly be throwing nearly 50% of it in the trash? Filmmakers and food lovers Jen and Grant (remember them from the Clean Bin Project film?) dive into the…See More
Apr 14
Yona Mez updated their profile
Apr 9
Victoria Armigo posted an event

"What's on Your Plate?" film screening at Sunnyvale Public Library on Thurs. 4/23/15 6-9p at Sunnyvale Public Library

April 23, 2015 from 6pm to 9pm
Films of Vision and Hope comes to the Sunnyvale Public Library. You are invited to join us at the library for the screening of "What's on Your Plate?" on Thursday 4/23/2015 from 6 - 9p. What's on Your Plate is filmed over the course of one year and follows two eleven year old multi-racial city kids Sadie and Safiyah as they explore their place in the food chain.  Sadie and Safiyah take a close look at food systems in New York City and its surrounding areas. With the camera as their companion,…See More
Apr 4
Victoria Armigo posted an event

Fourth Friday/Films of Vision and Hope "A Fierce Green Fire" 3/27/2015 7:15p in Palo Alto at Unitarian Universalist Church of Palo Alto - UUCPA

March 27, 2015 from 7:15pm to 9pm
Fourth Friday/Films of Vision and HopeA Fierce Green FireMarch 27, 2015 - Film starts promptly at 7:30pm - discussion to followAs many people and organizations explore how to “step things up” – to get more active in working for climate and environmental justice – March Fourth Friday will take a look at where we’ve come from.A Fierce Green Fire explores fifty years of grassroots and global environmental activism – from conservation to climate change. The film premiered at Sundance in 2012 and…See More
Mar 17
Victoria Armigo posted an event

Spring Share Faire! Palo Alto, Sunday, 3//15/1511a -1p at Lucie Stern Community Center, Fireside Room and Patio

March 15, 2015 from 11am to 1pm
It's the Spring Share Faire!Lucie Stern Community Center, Fireside Room and Patio, Sunday, March 15, 2015  11:00 AM to 1:00 PMBring stuff to share - garden produce, books, clothes, crafts, toys, etc., AND learn new skills.Plus fun activities for kids!We're excited to be holding our first Share Faire at Lucie Stern Community Center.  The Fireside Room will give us some wonderful indoor space (and a place to hide from the rain, if only!).  The Patio will allow us to spread out, holding many skill…See More
Feb 27
Yuri Smirnov posted a photo

Alternative News Project

Main stream mass-media overwhelm us with destructive, depressive and negative news and information.If you are tired of it you're welcome to join the Alternative News Project -…
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Feb 15
Victoria Armigo posted an event

"Growing Cities" film screening at the Sunnyvale Public Library on Wed. 2/25/15 6-9p at Sunnyvale Public Library

February 25, 2015 from 6pm to 9pm
I am happy to announce that we are partnering with Sunnyvale Public Library to screen the film "Growing Cities" on Wednesday 2/25/2015 from 6 - 9p. Here is the link to view the trailer of the film  http://www.growingcitiesmovie.com/the-film/ I hoping that you can all come to the library for the screening, and then stay after the film to participate in what I think will be a lively discussion!…See More
Feb 9
Yuri Smirnov posted photos
Jan 30
Yuri Smirnov commented on Yuri Smirnov's blog post Vedic Russia Retreats in 2015!
"Dear friends, guess what? ))) I have an exclusive offer for you! Make an early deposit payment for 10 day Vedic Russia Retreat and...- The event will cost you 870 EURO only! Instead of 1160 EURO (25% Off)- You are free to choose ANY month…"
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Paolo Pecora updated their profile
Jan 21
Paolo Pecora joined Transition East Bay's group
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Transition East Bay

Want to meet others interested in food security, local currency, permaculture, energy decent planning, etc...? Join us!
Jan 21
Victoria Armigo added a discussion to the group Transition Silicon Valley
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TSV Open Meeting and Potluck on 1/26/2015 in Los Altos

Happy New Year! Our thoughts are to start social with wine, appetizers and posters  that cover: Our past - History if TSV, our founding mission, values and evolution Today - What are current  community needs to achieve sustainability? - What existing organizations, efforts are working to fill gaps? - What are gaps that are not being addressed? Future - What role can  TSV play to shore up community sustainability? - How should TSV show up and align with other efforts? You are all invited to…See More
Jan 21
Victoria Armigo posted an event

Fourth Friday/Films of Vision and Hope "Worse than Poop" 1/23/2015 7:15p in Palo Alto at Unitarian Universalist Church of Palo Alto - UUCPA

January 23, 2015 from 7:15pm to 9pm
Fourth Friday/Films of Vision and HopeWorse than Poope2 Transport- London, the Price of TrafficAs the Peninsula grapples with how to address traffic congestion and rising carbon emissions from transportation, these two short films shed light on the problems posed by car traffic in an increasingly congested urban world. From an animated universe in which cars ‘poop out’ their CO2, to the mega-city of London where planners challenge the notion that cities should be designed for cars - these films…See More
Jan 20
Yuri Smirnov commented on Dandarius's group ECOVILLAGE NETWORK
"My dear friends and co-creators of the World! Main stream mass-media overhelm us with destructive, depressive and negative news and information. If you are tired of it please join and support the Alternative News Project…"
Jan 17

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