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Archive for May, 2011

I love this video 😉

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The Food Forest writes…

This rare and candid interview with David Holmgren, co-originator of the permaculture concept was obtained by Sam Collins during a Permacuture Design Certificate course David taught at The Food Forest in April 2010. David reflects on the future of human occupation on the planet and permacultures template for survival and abundance.

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The RETScreen Clean Energy Project Analysis Software is a unique decision support tool developed with the contribution of numerous experts from government, industry, and academia. The software, provided free-of-charge, can be used worldwide to evaluate the energy production and savings, costs, emission reductions, financial viability and risk for various types of Renewable-energy and Energy-efficient Technologies (RETs). The software (available in multiple languages) also includes product, project, hydrology and climate databases, a detailed user manual, and a case study based college/university-level training course, including an engineering e-textbook.
Software & Data Requirements: Microsoft® Excel 2000 or higher; Microsoft® Windows 2000 or higher; and Microsoft .NET Framework 2.0 or higher. Please make sure that the latest updates from Microsoft (www.microsoft.com) for Windows and Excel are installed on your computer.

Click here to download RETScreen 4 (44 MB).

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HOMER is a computer model that simplifies the task of evaluating design options for both off-grid and grid-connected power systems for remote, stand-alone, and distributed generation (DG) applications. HOMER’s optimization and sensitivity analysis algorithms allow you to evaluate the economic and technical feasibility of a large number of technology options and to account for variation in technology costs and energy resource availability. HOMER models both conventional and renewable energy technologies:

Power sources:
• solar photovoltaic (PV)
• wind turbine
• run-of-river hydro power
• generator: diesel, gasoline, biogas, alternative and custom fuels, cofired
• electric utility grid
• microturbine
• fuel cell

Storage:
• battery bank
• hydrogen

Loads:
• daily profiles with seasonal variation
• deferrable (water pumping, refrigeration)
• thermal (space heating, crop drying)
• efficiency measures

You can download and use HOMER for free.

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Welcome to the Australian Bureau of Agricultural and Resource Economics and Sciences (ABARES).

Search digital library here.

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The DailyGreen writes…

“Learn the basics of solar panels, inverters, installers, siting, financing and more. Harvest your own clean energy from the Sun.

The following guide will help you start exploring the possibility of going solar at your house. Let’s first get up to speed on solar electricity basics with a few key definitions:

PV Module: aka a solar panel, converts energy from the sun into direct current (DC) energy. PV Modules come in varying wattages and sizes. Typical PV modules used on home installations are 200 watts and about 14 square feet.

PV Array: A number of PV modules wired together. Using 5 x 200 watt PV modules creates a 1,000 watt PV array. Typical array sizes range from 2,000 to 5,000 watts and up.

Inverter: Converts DC electricity into alternating current (AC) electricity used around the house. A 3,000 watt inverter will output 3,000 watts of AC electricity given enough PV input. Typical inverter sizes range from 2,000 watts to 7,000 watts…”
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telegraph.co.uk writes…

“John Rudgard was leading a stressful life in the hospitality sector, working unholy hours at the office when his wife, Stephanie, sent him on a course — Permaculture for Busy People. It changed their lives. Now they lead a more sustainable existence, raising animals and growing food, and make a living teaching others how to follow in their footsteps, from their house, Rifleman Cottage, in Kent… ”

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