insulation - Sp3 Flashcards

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1
Q

in what ways can energy be transferred by heating?

A

through conduction, convection and radiation

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2
Q

what methods of thermal insulation reduce unwanted energy transfer?

A

placing tinfoil behind radiators, curtains, double glazed windows, cavity wall, loft insulation

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3
Q

what are different ways of reducing energy transfer by heating work?

A

use insulators (anything with low thermal conductivity)
use thicker materials (more air pockets)

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4
Q

what does thermal conductivity mean?

A

how good an object can preserve thermal energy within a contained environment

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5
Q

What are the effects of the thickness and thermal conductivity of the walls and its cooling rate

A

Thickness reduces heat loss as it takes longer for heat to pass through. Thermal conductivity - heat is trapped in air bubbles - conductivity can be increased with cavity walls (stops air circulation + increases air bubbles) - cooling rate = quite slow as there is a lot to get through

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