21 Feb '12, 5am

Green Building Q&A: Slab dimensions for passive solar

I found the following answer and need clarification on the last paragraph. When Robert Riversong says " floor area", does he mean the whole floor area of the house or just the floor that could be exposed to sunlight? For both radiant thermal mass and passive solar thermal mass, the ideal thickness of a poured concrete slab happens to be exactly the same as the industry standard for residential applications: 4". For reasonable response time, it's best to have radiant tubing at about 2" from the slab surface. Heat conducts through concrete at approximately 1 hour per inch. So a 4" slab will absorb and release solar heat during an approximate 8-hour cycle. This corresponds well with absorption during the heat of the day (noon) and release by early evening when the sun is down and the house is cooling. For passive solar thermal mass, the area of slab in direct sun relative to ...

Full article: http://www.greenbuildingadvisor.com/community/forum/green...

Tweets

Apple Building 100-Acre Solar Array

Apple Building 100-Acre Solar Array

ecorazzi.com 21 Feb '12, 4pm

Apple Building 100-Acre Solar Array 0 Tweet by Michael dEstries February 21, 2012 Categories: Causes , Environment , Inter...

Anyone familiar with Passive House design?

Anyone familiar with Passive House design?

passivehouseinthewoods.com 26 Feb '12, 2am

A high-performance building delivering carbon-neutrality

U.S. Group Will Relax Passive House Standard - EBN

U.S. Group Will Relax Passive House Standard - EBN

buildinggreen.com 29 Feb '12, 2am

What's Happening from Environmental Building News U.S. Group Will Relax Passive House Standard “TrekHaus," a Passive House...

Passive House in the Woods Goes Energy-Positive

greenbuildingadvisor.com 27 Feb '12, 11am

As the clock wound down on 2011, marking a full year of monitoring for Passive House in the Woods , in frosty Hudson, Wisc...

Thermal Storage Gets More Solar on the Grid

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What is an environmentally conscious — but air-conditioning-loving — homeowner to do? Peak demand for electricity in the U...

House Published in New Passive House Book

passivehouseinthewoods.com 27 Feb '12, 4pm

House Published in New Passive House Book February 27th, 2012 by Tim Delhey Eian The Passive House in the Woods project wa...

Apple polishes green credentials with giant 20M...

businessgreen.com 21 Feb '12, 1pm

Apple has revealed plans to build a giant 20MW solar array to help power its North Carolina data centre, as part of its la...

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greentechmedia.com 22 Feb '12, 6pm

Last week we reported that Samsung was withdrawing from the crystalline solar market , a market to which it had previously...

In Focus: Integrated Solar Storage Tile

In Focus: Integrated Solar Storage Tile

solarfeeds.com 26 Feb '12, 2am

Solar researchers from Kerala, a southern state of India, have designed the world’s first integrated solar energy storage ...

Green Building Q&A: Radon and Sub Slab Drainage

greenbuildingadvisor.com 29 Feb '12, 1pm

Asked this over at JLC, I am still interested in opinions on question and comments... I am going to use the formadrain in ...

We've just had confirmation @DECCgovuk will lod...

businessgreen.com 21 Feb '12, 10am

The government is reportedly poised to lodge a Supreme Court appeal against two court rulings that branded its plans to cu...