Quote:
Originally Posted by natureguy
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Quote:
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Originally Posted by pooja's comment in link
Cooler countries like US and Northern European have an advantage over warmer countries like India and others. They need heating while we need cooling (Air Conditioners).
While most of the renewable energies are capable to provide heating, almost any technology (protable form which is used at home) can't run our air conditioners.
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Heat pumps never really took off in cold climates as much as in hot ones because ground source geothermal heat pumps are the cheapest form of air conditioning (1/3 to 1/4 the energy needed for the same amount of BTUs of cooling) but you can go one step further with annual and daily heat storage because you can store the cool air at night or at cool times of the year in the soil and eliminate the need for a heat pump altogether but still need fans or pumps to move the transfer fluid around unless you build underground like the "Passive Annual Heat Storage" book I mentioned recommends... then you have permanent 18-20 C room temperature without any fans or any mechanical stuff. Many ancient buildings found in the deserts of Iran and Iraq had similar air vent designs built into the walls as was only discovered when they used ultrasonics to see the internal structure of the walls. These buildings are very steady in temperature and working perfectly being unoccupied for decades and being built thousands of years ago and surviving many earthquakes... it can be done and built with dirt and stone and straw... you just need to know how to arrange the air vents inside the walls and under the ground.