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Lecture 6

GEOG 3EE3 Lecture Notes - Lecture 6: Thermal Mass, Facing Windows

Course Code
Maureen Padden

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Sep 29 Energy
Solar radiation
Seasonal differences – more energy in summer than winter
In the summer, the sun spends more time overhead, so horizontal surfaces will get more energy
than vertical surfaces, opposite is true for winter
Solar heat to produce electricity – focused parabolic mirrors to heat a black pipe that then
powers a generator
- mirrors concentrated on one point
Solar ovens – small simple systems that can be used in poor areas
- the current large source of food cooking is biomass = wood and dung
- not enough wood for everyone, massive deforestation
- using free fertilizer and resorting to buying replacements
- issues with it, not for urban settings, restricted on the sun, has to move with the sun
Heating water more efficiently.
Planting deciduous trees and plants on south facing windows is useful because they have
leaves when you want the shade, and allow energy when in winter.
Tromwall – glass exterior heats a large thermal mass creating a convection cycle heating the
area behind it
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