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Will Stewart has a guest post up at The Oil Drum on passive solar design techniques - Passive Solar Design Overview - Part 1. Also, at TOD, a post on the Passivhaus standard from another long-time commenter, marjorian - US Housing and the Passive Home Standard. Passive solar refers to the design and placement of a building to enable solar heating without the need for sensors, actuators, and pumps, in contrast to active solar, which utilizes pumps/blowers, sensors, and logic control units to manage collection, storage, and distribution of heat. The two techniques are not exclusive, however, and can work together effectively. As solar radiation (insolation) is a diffuse energy source, and not at the beck and call of a thermostat, passive solar design techniques are at their best when combined with other related methods, such as energy efficiency (insulation, weatherization, building envelope minimization), daylighting, passive cooling, microclimate landscaping, and a conservation lifestyle (i.e., temperature settings, raising and lowering of insulated shades, etc). Most of these topics will be covered in other articles, though passive cooling will be addressed in this series, which is intended as an overview, as a complete engineering treatment on passive solar design would require several dozens of articles.

Solar energy can be utilized in various ways - to provide electricity, mechanical power, heat and lighting. Passive solar heating and cooling can save substantial electricity bills. Design of a building is very important for tapping passive solar energy. The building and windows are designed in such a way that they carefully balance their energy requirements without additional mechanical equipment. Solar benefits are utilized through windows and pumps, and fans are used minimally. Passive solar energy utilizes building constituents such as walls, floors, roofs, windows, exterior building elements and landscaping to control heat generated by sun. Solar heating designs try to trap and store thermal energy from sunlight directly. Passive cooling minimizes the effects of solar radiation through shading or generating air flows with convection ventilation.

The most-emailed NYT article for two days running has not been another explanation of the shaky housing market (that's #2), but rather a front-page story on solidly built "passive houses": Using ultrathick insulation and complex doors and windows, the architect engineers a home encased in an airtight shell, so that barely any heat escapes and barely any cold seeps in. That means a passive house can be warmed not only by the sun, but also by the heat from appliances and even from occupants' bodies. [emphasis added] It's staggering how much energy can be saved this way:

Cranking up the heater or throwing on an extra sweater are two ways to cope with a drafty house that allows chilly air to seep in through cracks, doors and windows. eeting of Passive House California organization, free and open to the public: When the sun blazes in the summer, that same house warms up rapidly, prompting people who live there to close the shades or drapes, pour an icy beverage and possibly flip on an air-circulating fan.

Renewable Energy World has an article on a plan to greatly expand the use of passive solar thermal energy in Europe - Action Plan for 50%: How Solar Thermal Can Supply Europe's Energy. The research efforts and infrastructure needed to supply 50% of the energy for space and water heating and cooling across Europe using solar thermal energy has been set out under the aegis of the European Solar Thermal Technology Platform (ESTTP). Published in late December 2008, more than 100 experts developed the Strategic Research Agenda (SRA), which includes a deployment roadmap showing the non-technological framework conditions that will enable this ambitious goal to be reached by 2050. A strategy for achieving a vision of widespread low-temperature solar thermal installations was first explored by ESTTP in 2006, but since then the SRA has identified key areas for rapid growth. These focus points include the development of active solar buildings, active solar renovation, solar heat for industrial processes and solar heat for district heating and cooling. Meanwhile, amongst the main research challenges is the development of compact long-term efficient heat storage technology. Once available, they would make it possible to store heat from the summer for use in winter in a cost-effective way.

Wall mounted Passive Infrared PIR motion sensor LED lights and energy saving lamps for outdoor and garden areas.

Steinel 230v motion sensor and occupancy sensor with 360° and 180° angle of coverage and area of detection reach upto 20 metres. These occupancy sensor and motion sensor lights can either be ceiling mount or wall mount and are available in Passive Infrared (PIR) and ultrasonic / microwave technologies.

Motion sensor Suppliers for 230v PIR based motion detector with 360° and 180° angle of coverage, area of detection and reach upto 20 metres. These PIR movement sensors for lighting can either be ceiling or wall mounted and is available in Passive Infrared (PIR) and ultrasonic / microwave technologies.

Motion sensor Suppliers for 230v PIR based motion detector with 360° and 180° angle of coverage, area of detection and reach upto 20 metres. These PIR movement sensors for lighting can either be ceiling or wall mounted and is available in Passive Infrared (PIR) and ultrasonic / microwave technologies.

From the outside, there is nothing unusual about the stylish new gray and orange row houses in the Kranichstein District, with wreaths on the doors and Christmas lights twinkling through a freezing drizzle. But these houses are part of a revolution in building design: There are no drafts, no cold tile floors, no snuggling under blankets until the furnace kicks in. There is, in fact, no furnace. Published to:

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Steinel German quality fine movement PIR occupancy sensor and presence detector for Classroom, Staff room and Study hall

Ceiling mount 360° ultrasonic motion detector and PIR motion sensor for car parking area and garage lighting control

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PIR motion sensor, occupancy sensor, presence detector, 230v PIR motion detector for energy saving and lighting automation in indoor and outdoor areas of hotel, school, warehouse, office building, car parking areas. Pammvi is dealer of german quality steinel brand PIR motion sensor, occupancy sensor, presence detector, LED lights in India.

Ceiling mount PIR motion sensor and wall mount ultrasonic motion sensor light for toilets, bathrooms, WC, washrooms and restroom.

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The City Council on Wednesday became the first in Ohio with a plan to channel grants and loans to residents and businesses to replace tar and shingles with vegetation. Supporters of the idea want to see Cincinnati become a leader in green roofs, a European-born movement that has spread to only a few U.S. cities, including Chicago, Milwaukee and Seattle.