Mechanisms of heat transfer

Insulation · The Basics · printed page 232 (PDF page 233)

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Heat Transfer – Mechanisms Insulation – the Basics

Text in the illustration

solid masonry
heat
outside (cold)
inside (warm)
conduction
heat transfer through a solid material
the direction of heat travel is always from hot to cold
radiation
heat transferred through invisible light waves e.g. thermal infrared energy (sunlight)
air above the pot warms up (becomes less dense) and rises - drawing more cool air in from the sides to be heated up
convection
heat transfer within a gas or liquid

Generated explanation

The illustration explains conduction, radiation, and convection using three side-by-side diagrams. Conduction is shown as heat moving through a solid masonry wall from a warm interior toward a cold exterior. Radiation is represented by waves traveling from the sun toward a house. Convection is illustrated by warm air rising above a pot, with arrows showing cooler air being drawn in from the sides. The figure explains heat-transfer principles rather than depicting an insulation installation or defect.

Components

solid masonry wall house

Materials

masonry