Discover Solar Energy, a comprehensive resource of more than 9,000+ renewable energy
links
to relevant websites of individuals, governments and organizations.   
The links are c
ross-referenced  to help homeowners, engineers, hobbyists, teachers
and students
find quick answers  to issues relating to alternative energy
Please 
Contact us with your comments, suggestions or to report bad links. Thanks!

 

HOME    Contact Us    Solar Energy    Wind Energy    Ocean Power    Energy Storage    Living Green    Fuels (BioEnergy)    Systems     
Self-Sufficient Living   
Green Transportation    Research & Reference     LINK to DSE / Link Exchange 


What is Solar Energy?
Solar Energy Basics  -  Passive Solar - Photovoltaic
Solar Cooking -  Solar Sails - Solar Radiation - Solar ThermalGeothermal

        Videos:  Geothermal - Photovoltaic - Solar Energy - Solar Thermal       

 

 

 

What is Passive Solar?  --  Ideas for Passive Solar
Last Updated on:  06/25/2015 06:31 AM

Why Passive Solar Works

The earth's axis is tilted, we learned that in elementary school.  As a result of the earth's tilt, the sun rises lower in the winter sky and rises higher in the summer sky.  In planning for passive solar in our homes, we must remember that in a Northern Hemisphere, the winter sun rises in the South East, stays low in the South sky, and then sets in the South West.  The summer sun rises more in the North East, quickly gains height to a higher elevation than in winter, and then sets back in the North West. 

So the best things to do in the Northern Hemisphere are:

  • Let the sunshine in to heat a thermal mass.  Orient the house such that the major axis runs east-west.  

  • Carefully place the windows.  Limit the number and size of windows on the Northern side of the house, to reduce Summer heating of the interior. Place more windows on the Southern side of the house.  Use wide eaves and tall shade trees to limit solar radiation in the Summer, yet provide plenty of solar heating in the Winter. Clerestory windows and dormers can bring winter light into otherwise dark areas of the house (minimize skylight use). Use a solar path chart to design a building so that low winter sun shines in and high summer sun is blocked by effective use of windows, overhangs and shade.

  • High R values with minimal air leaks are key to any low-energy house.  Do a blower door test to verify house tightness. Invest in a high performance ventilation system; an air to air heat exchanger recovers the heat in exhausted ventilation air.

  • Thermal mass, inside the building, moderates temperature swings by storing heat during the day and releasing it a night. Materials commonly used for mass include water, concrete, masonry, and earth. Keep the mass at 3-4 thick, and keep it in the direct sun for best effectiveness. Mass must be carefully balanced with glazing area to perform properly in a given climate.

  • Do your homework before building.  Time spent on the building site observing sun, wind, rain, and ground water pays off in selecting the ideal location and design for the house.

In colder climates, it's important to store as much of the incoming solar energy during the day as possible, and then allow it to continue heating the house during the night.  The best way to store this heat is in a large thermal mass.  One popular (and patented) way to do this is with a thick slab floor.  This floor could be solid concrete, or a layer of rock.  Since the incoming sunlight will only heat the South side of the slab (via the windows) several ingenious methods have been devised to circulate air through the slab.  This air serves to moderate the temperature of the slab during the day, and help heat the air within the house during the night.  

Please suggest additional links      

 

Passive Solar Links

CEPHEUS:Cost Efficient Passive Houses as European Standards - Austria 
National Home Plans Inc :Browse through home plans, many featuring energy-efficient "passive-solar design," Charles Koty, A.I.A. Order plans by phone, fax or mail.

Please suggest additional links 
More Passive Solar Links  


HOME    Contact Us    Solar Energy    Wind Energy    Ocean Power    Energy Storage    Living Green    Fuels (BioEnergy)    Systems      
Self-Sufficient Living  
Green Transportation    Research & Reference    LINK to DSE / Link Exchange     Privacy Policy

Copyright 2000-2013  www.discoversolarenergy.com.   All rights reserved.
Please note that www.DiscoverSolarEnergy.com does not endorse or sponsor the external sites listed on this site. 
We do not
attest to the accuracy of the information given on these external sites. 
Any trademarks are the property of their respective owners.