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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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Latest Activity

Victoria Armigo posted an event

Fourth Friday Film - Surviving Progress - Sept. 26, 2014 7:00p at Unitarian Universalist Church of Palo Alto - UUCPA

September 26, 2014 from 7pm to 9pm
Fall Fourth Friday - New Films of Vision and Hope SeriesFinding Meaning in an Uncertain WorldA special film series is coming up for fall Fourth Friday. What does it mean to be human in today’s uncertain world - to survive, live among others, and find meaning and happiness?Surviving ProgressFriday September 26, 2014 7-9PM   NOTE time change just for this monthHuman advancement is awe-inspiring and double-edged, but we’re running the 21st century’s software — our know-how — on the ancient…See More
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Victoria Armigo posted an event
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TPA Fall Sharing Expo at Common Ground in Palo Alto at Common Ground

September 21, 2014 from 1pm to 3pm
Transition Palo Alto Fall Sharing Expo atCommon Ground Organic Garden Supply & Education CenterSunday, September 21, 20141:00 to 3:00 PM559 College Ave, Palo Alto, CA 94306Mark your calendars.  The Fall Sharing Expo is taking shape.  Besides goods (garden and food, books, clothes and toys), to share, we'll have a number of Skill-Share demonstrations.  Given the drought, our theme will be Water Saving Tips this time.  Confirmed demonstrators include:William Mutch - Permaculture Cafe, saving…See More
Sep 2
Doris Anne Beaulieu posted a blog post

Kids Love For Animals

Kids Love For Animals ( Poem )Children’s favorite shows are of animals I have hours in a playlist that are laughable Like a camera pecking rooster and fun monkeysTo a mom and a baby miniature donkeysVideos of wild turkeys and charming geese Ducks in water and chicks learning to speak Dazzling ostrich and many free birdsSome you would not want to move towardsA large unique animal is the alligator The total opposite of the caterpillar Camels and alpacas are tall and exquisiteBut they spit at you…See More
Aug 26
Doris Anne Beaulieu posted a blog post

Tractor Pulls

Tractor Pulls ( Poem )America’s passion tractor haul Ford and Farmall want to take it all Showcasing your tractor is never dullCase give a strong performance callSee a smokey John Deere tractor Unleash yourself in an Oliver Massey Ferguson speeds uncoveredAs International pulls with no effortWhite’s power with high tractive force As McCormick is running the course Agricultural machinery CompetitionFun family oriented tractor pullin’Opportunities may come and go You all know it’s a successful…See More
Aug 23
Yuri Smirnov posted a blog post

Dolmen pilgrimage, August 2014

My dear friends,Please enjoy beautiful pictures from the August dolmen pilgrimage: https://www.flickr.com/photos/spaceoflove/sets/72157646184247100/ A couple from Germany visited dolmens of Pshada, Shetinin's school and ecovillage of Kin's domains Sinegorie. For details please check…See More
Aug 22
Yuri Smirnov posted photos
Aug 22
Yuri Smirnov commented on bob banner's blog post Call of The Ringing Cedars by Scott Fraser
"Please enjoy beautiful pictures from the August dolmen pilgrimage: https://www.flickr.com/photos/spaceoflove/sets/72157646184247100/ A couple from Germany visited dolmens of Pshada, Shetinin's school and ecovillage of Kin's domains…"
Aug 22
Tammy Davis joined Dandarius's group
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Organic Gardening & Permaculture

How can we transition without being able to grow your own organic food or find it in your local community? How can we successfully transition without applying permaculture principles to your environment? Learn, share, and explore in this group.
Aug 22
Doris Anne Beaulieu posted a blog post

Woodsmen Day

Woodsmen Day ( Poem)Sport using handsaws With a toothed edge blade One or two handed sawingOn a woodsmen fair dayTraditional log rolling Is a lumberjacks technique Style used in river drivingThe illustration is uniqueSpringboard tree is branchless With live action you can’t beat Platform board is dangerousA risk if you competeBlock ax chopping Is a loggers sport indeed Hard on your back swingingBe careful of your feetWoodsmen day activities Is part of the fair you see I bring it all to my…See More
Aug 21
Chelsea O'Neill posted a blog post

Ecotech Institute’s Clean Jobs Index Shows 1.2 Million New Clean Jobs in 2014

Ecotech Institute’s Clean Jobs Index, a tool to compare states’ use and development of clean and sustainable energy, found more than two million job postings in the green energy sector in quarters one and two of 2014 alone. This is almost an 88 percent increase from…See More
Aug 18
Doris Anne Beaulieu posted a blog post

Wishing Witch

Wishing WitchMy Halloween screenplay is funny as can be It’s funny how witchcraft is what we need to seeBrewing up trouble with all your classmates The teacher will get angry, make no mistakeCrazy riddles from a child can be so scary Being her classmate leaves you feeling waryYou may start a princess and end as a boar As her riddles will leave you in an uproarWill you return to normal after all this nonsense Is the question that has everyone in suspenseYou may not have believed in the…See More
Aug 11
Darkin Tanner left a comment for Nabil Michraf
"Hello Nabil and welcome to the Transition California Community Network! We are happy that you joined and welcome your involvement and sharing with the community. Here is a link to the 'how to' video tutorials for using and navigating the…"
Aug 8
Nabil Michraf is now a member of Transition California
Aug 8
Doris Anne Beaulieu posted blog posts
Aug 7
Doris Anne Beaulieu posted a blog post

Read All About It

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Aug 3
Eric Broberg joined Dandarius's group
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Organic Gardening & Permaculture

How can we transition without being able to grow your own organic food or find it in your local community? How can we successfully transition without applying permaculture principles to your environment? Learn, share, and explore in this group.
Jul 21
Eric Broberg updated their profile
Jul 21
Victoria Armigo posted an event

Accelerating the Transition to Clean Renewable Energy 7/23/14 in Sunnyvale at Sunnyvale Heritage Park Museum

July 19, 2014 from 7pm to 8:30pm
Community Choice:  Accelerating the Transition to Clean, Renewable Energy--Progress and Threats Wednesday, July  23, 2014 7-8:30 PM Sunnyvale Heritage Park Museum 570 E. Remington Drive Sunnyvale, CA What can a city do to accelerate the switch to clean and renewable energy? Many see Community Choice, which allows local control over electricity purchases, as an effective way of hastening the switch. Marin and Sonoma Counties are already providing their residents and businesses cleaner, greener…See More
Jul 19
Eric Broberg is now a member of Transition California
Jul 16
Victoria Armigo posted an event

Fourth Friday Film - Gaining Ground - July 25, 2014 7:30p at Unitarian Universalist Church of Palo Alto - UUCPA

July 25, 2014 from 7:15pm to 9pm
July Fourth Friday - "Gaining Ground" Film and discussion, plus special guest - producer Mark Lipman In the midst of the economic meltdown, Gaining Ground explores the innovative, grassroots organizing efforts of the Dudley Street Neighborhood Initiative (DSNI) in Boston. Over the course of two years, you'll see a new generation of leaders working to prevent foreclosures and bring jobs and opportunities for young people to one of the city’s most diverse and economically challenged…See More
Jul 8

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