Solar Space Heater
Solar Space Heater
With the wind gusting at our doors, how can we stay energy-efficient this season?
Even though the official start of winter is still days away, many parts of the country have been in a deep freeze for more than a week. And with electricity and fuel costs on the rise, saving energy is increasingly important for the average Canadian household.
To help keep his barn warm on cold days, a farmer stores 880 kg of solar-heated water (Lf = 3.35 x105 J/kg) in?
To help keep his barn warm on cold days, a farmer stores 880 kg of solar-heated water (Lf = 3.35 x105 J/kg) in barrels. For how many hours would a 1.0 kW electric space heater have to operate to provide the same amount of heat as the water does, when it cools from 10.0 to 0.0°C and completely freezes?
By Q = m x c x delta t*C + m x L
=>Q = 880 x 4187 x 10 + 880 x 335000
=>Q = 331645600 J
As 1 kW = 1000 W = 1000 J/sec
Let the space heater is operated for t sec
=>1000 x t = 331645600
=>t = 331645.60 sec
=>t = 10.23 hours
How to Build a Solar Space Heater (Part 2) NCSSM, YIKES, and The Forest Foundation
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