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Old 03-20-12, 04:54 PM   #1
briligg
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Default Heat loss in watts, stored heat in joules - how to compare?

Hi all, i'm new
We are designing a passive solar house, and we have worked out how much heat we can store in its thermal mass, and how much solar energy passes through the glazing, both in joules. The heat leaking to the outside is all expressed in watts. How can i calculate how many joules it takes to maintain the same temperature inside the house?

I have a book that explains the whole business in Btu's (Kachadorian - The Passive Solar House), and i'm going to do the calculation that way, and then convert it, but it would be a lot easier if i could stick to metric - we live in metric-land, and most of the materials we are checking out are listed with metric specs. Can anyone help?

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