rohar writes: "CodeShark has a brief essay on r2dot.org with the conlusion: "The future of renewable power belongs in power cycles that do not require high peak temps but instead, massive amounts of low grade heat"."
rohar writes: "Having lurked around SlashDot since the late '90's and watching the lack of scalability of some of the newer blogging software, I thought I would put together an energy based forum on some "Old School" Slash that brings together my main interests: Open Source IT and renewable energy system design. The intent is to provide a free hosting system for renewable and traditional energy bloggers that lowers the time commitment and has the features like group moderation and threaded comments that make comments and discussion a little more scalable than blogging. r2dot.org is up and running and after messing with Slash for a week, I have a love/hate relationship with CmdrTaco.:)"
rohar writes: "SHPEGS is an open design not-for-profit project to design and prototype a base load renewable electrical generation system suitable for moderate climates and built from common materials. The design centers around creating a local geothermal source with an efficient solar thermal water heater system and can be scaled from the single residence to the mega-project. The project was recently featured in an in-depth The Future of Things article. The heliostat system used in Europe's First Solar Thermal Plant could be used in a scaled down SHPEGS system with Practical Solar's small scale heliostats."
snkinad writes: "Strizki lives in the nation's first solar and hydrogen powered house where he doesn't have to worry about any gas or electric bills. "The sun comes up and my solar panels snatch that energy, and any excess goes into tanks," he said. "I don't have to worry about power failures here."
The system design would integrate very well with the SHPEGS concepts and combining this type of CSP plant with seasonal thermal storage and a massive air-coupled solar heat pump has a very strong potential for high summer insolation/cold winter climates like Canada and the Northern US and Europe."
Makarand writes: This article in the Chronicle describes how
geothermal pumps could be used to heat our homes instead of natural gas or electricity. These pumps rely on the fact that regardless of what the surface temperature
of the earth is, it is always 60 degrees a few hundred feet below. You have to drill a few holes 200 feet deep
and insert U-shaped tubes in them and connect these to a heat exchanger.
The tubes are filled with a solution of water and alcohol to prevent corrosion.
Circulation pumps drive the water solution
through the tubes in the ground and when the solution comes up
from underground it is warm because it has passed through an
environment of about 60 degrees.The heated liquid then is passed through the heat exchanger which
takes care of the business of heating your home.
rohar writes: "The Future of Things has an article/interview on the Open Source SHPEGS project. The SHPEGS project is a not-for-profit renewable system design project with the focus of creating a clean, baseload, renewable power system for moderate climates based on solar, geothermal and heat upgrader/pump steampunk technology. The SHPEGS design takes advantage of moderate climates by capturing the heat from the high summer solar insolation and warm summer air of more northern locations and storing it in massive thermal storage. During the winter cycle power is generated as with a traditional geothermal system and a massive quantity of ice is stored underground for summer efficiency. The initial SHPEGS system was featured on slashdot back in January and has seen many refinements in design, interest from commercial ventures and improvements in presentation materials as the project has moved along. Vinod Khosla is a major proponent of Solar Thermal power generation, and he speaks on it in these Australian Four Corners videos."
An anonymous reader writes: TFOT has a detailed article on an open design renewable energy project. The article give a good overview of some existing renewable systems, their shortcomings and an interview with the SHPEGS project initiator.
rohar writes: "In the few months since this Open Design Renewable Energy Project was initiated, the concept has seen vast technical input from many sources and the design and calculations have gone through several revisions. The project has recently had several serious inquiries from VC firms and commercial entities and is rapidly moving into the demonstration project phase. The project will remain open and not-for-profit and attempt to assist commercial entities and communities in adapting the system.
The design focus is to build a feasible renewable base load power station from common materials for moderate climates like Western Canada where there is high solar isolation during the summer, but very cold temperatures and little daylight in winter. A binary geothermal system is integrated with massive local underground thermal storage and a solar thermal powered air-coupled absorption heat pump water heater that has the potential to more than double the thermal output of the solar collectors. Power is generated while heating the thermal storage in the summer and this local thermal storage is used in a traditional binary geothermal system in the winter. The sub-0C winter temperatures and relatively close thermal storage allow for an efficient geothermal system in the winter and the winter air will cool the thermal storage well below freezing for efficient summer operation.
A SHPEGS is a Solar Heat Pump Electrical Generation System."
jbcage writes: A professor at North Carolina State University has built a cluster computer using 8 PlayStation 3's running Linux. "His cluster of eight PS3 machines — the first such academic cluster in the world — packs the power of a small supercomputer, but at a total cost of about $5,000, it costs less than some desktop computers that have only a fraction of the computing power."
rohar writes: "With the current media hype on climate change and various commercial ventures being launched in the renewable energy sector, I wrote what I think is an unbiased essay on evaluating renewable energy systems to hopefully increase public understanding of various systems and their feasibility."