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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 Darlene Cavallara 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 Darlene Cavallara. Last reply by Evan Spurrell Apr 10, 2011.

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Comment by Darlene Cavallara 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 Darlene Cavallara 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.
 

Members (15)

 
 
 

Latest Activity

Yuri Smirnov posted photos
Thursday
Yuri Smirnov posted a video

Wonders of Sacred (Vedic) Russia!

Learn how to sleep under the starry sky... and enjoy some wonders of Krasnodar region (1 hour drive from Vedrussiya Kin's settlement). Come and see sacred pl...
Thursday
Yuri Smirnov posted a video

Dancing... dancing... Russian Festival of Arts and Crafts!

Enjoy the Festival of Arts and Crafts in ecovillage of Kin's domains "Vedrussiya"! Come and see sacred places of Vedic Russia, astounding dolmens and megalit...
Aug 20
Yuri Smirnov posted videos
Aug 18
Darlene Cavallara updated their profile
Aug 2
Doris Anne Beaulieu posted a video

Series 1969 B Federal Reserve Note

This is some " Big Money" to join the 723rd Military Police Army National Guard back in 1969.
Aug 1
Victoria Armigo posted an event
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"Urban Roots" film screening at Sunnyvale Public Library on Tues. 8/18/15 6-9p at Sunnyvale Public Library

August 18, 2015 from 6pm to 9pm
Films of Vision and Hope comes to Sunnyvale! You are invited to join us for a free screening of the film "Urban Roots" at the Sunnyvale Public Library, 665 West Olive, Sunnyvale, CA, on Tuesday evening 8/18/15 from 6-9p.Brought to you by Charles Street Gardens, Full Circle Farm Sunnyvale and Transition Silicon Valley.Here is a link to the trailer:http://www.treemedia.com/#!urban-roots/c1cnzSynopsis - follows the urban…See More
Jul 27
Victoria Armigo posted an event

Fourth Friday/Films of Vision and Hope "Racing to Zero" 6/26/2015 7:15p in Palo Alto at Unitarian Universalist Church of Palo Alto - UUCPA

June 26, 2015 from 7:15pm to 9pm
June - Fourth Friday Films of Vision and Hope"Racing to Zero"At the past couple of Fourth Fridays, we've looked at the problem of food waste, and seen what we can do to start reducing it. This month, let's look at reducing waste overall.Racing To Zero is a quick-moving, upbeat documentary presenting new solutions to the global problem of waste. By simply substituting the word RESOURCE for the word GARBAGE, a culture can be transformed, and a new wealth of industries can emerge.Three years ago…See More
Jun 22
Yuri Smirnov posted a video

Eco-Festival in Kin's village Vedrussia, Russia, Krasnodar region.

Just a few moments from the Eco-Festival of friends in June 2015. Come and see sacred places of Vedic Russia, astounding dolmens and megaliths, visit art and...
Jun 22
Yuri Smirnov commented on Darlene Cavallara's group ECOVILLAGE NETWORK
"This video below came out of my joy and inspiration, it was made for YOU - to enjoy and feel the purity of Russian nature and immerse into the wisdom of dolmens... https://www.youtube.com/watch?v=TyrV-nN-YHA"
Jun 20
Victoria Armigo posted an event
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TPA Share Faire! Palo Alto, Sunday, 6/21/1511a -1p at Lucie Stern Community Center, Patio

June 11, 2015 from 6pm to 7pm
Transition Palo Alto Share FaireLucie Stern Community Center - PatioSunday, June 21, 201511:00 AM to 1:00 PMIt's just over a week until we Share.  Are you ready?  We have a record number of teachers and community groups sharing their skills and projects with you this time.  And, of course, people will be bringing many interesting things to share as well.  It's going to be lots of fun.In order to get you ready, we thought that we'd share a recent blog post with you.  A couple of months ago, a…See More
Jun 11
Victoria Armigo posted an event
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"In Organic We Trust" film screening at Sunnyvale Public Library on Weds. 6/3/15 6-9p at Sunnyvale Public Library

June 3, 2015 from 6pm to 9pm
You are invited to join us for a free screening of the film "In Organic We Trust" at the Sunnyvale Public Library on Wednesday evening 6/3/15 from 6-9p. Synopsis - We can no longer stomach our food system. It's killing more and more Americans and costing billions in health care. But is organic really better for us or just a marketing scam? When corporations went into the business and "organic" became a brand, everything changed. The philosophy and the label grew apart. Can gummy bears or…See More
May 21
Yuri Smirnov posted a photo

Spirit of Vedic Russia...

Come to meet the Spirit of Vedic Russia, explore the dolmens, visit fascinating Shetinin's school (Kin's school or Forest school) and emmerse into the atmosphere of the ecovillage of Kin's domains!The event has been inspired by "The Ringing Cedars…
May 14
Yuri Smirnov posted a status
"I fixed the subtitles for the new Tekos video - they are much easier now to read! ))) http://www.youtube.com/watch?v=YW2lFeNkLLM"
May 14
Victoria Armigo posted an event

May Fourth Friday, Shop Your Kitchen Potluck 5/22/2015 7-9p in Palo Alto at Unitarian Universalist Church of Palo Alto - UUCPA

May 22, 2015 from 7pm to 9pm
May 22, 2015 - Fourth Friday Shop your kitchen potluck!We're continuing our look at food waste with a fun "anti-food waste" evening. Bring a potluck dish to share - with this extra twist: Try to use as much as you can from your own kitchen. Or, ask your favorite vendors at your grocer's, farmer's market, or bakery for good food that might not be quite "perfect" - like day-old bread or produce with small blemishes.Got a can of garbonzo beans? Make hummus!Got a cabbage in the fridge? Make cole…See More
May 13
Yuri Smirnov posted a video

Mysteries of the Lightfall - a unique school in Tekos.

In this school children are the teachers to each other. In this school the sciences, concert tours, sports and technology go side by side. In this school pup...
May 3
Victoria Armigo posted an event
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"King Corn" film screening at Sunnyvale Public Library on Sat. 5/9/15 3-6p at Sunnyvale Public Library

May 9, 2015 from 3pm to 6pm
Films of Vision and Hope comes to the Sunnyvale Public Library. You are invited to join us at the library for the screening of "King Corn" on Saturday 5/9/2015 from 3 - 6p.This film follows filmmakers Ian Cheney and Curt Ellis, best friends from college on the East Coast who move to the heartland to learn were their food comes from. With the help of friendly neighbors, they plant a grow a bumper crop of America's most productive, most subsidized grain on one acre of Iowa soil. But when they try…See More
Apr 27
Yuri Smirnov posted photos
Apr 19
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
Apr 19
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

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