: For porous materials like wood or insulation, moisture significantly increases conductivity because water ( ) is more conductive than air (
: Higher density typically leads to higher conductivity because particles are more closely packed, facilitating easier energy transfer. thermal conductivity ppt download
: Conduction occurs via molecular collisions and diffusion . Because molecules are further apart than in solids, liquids (except for liquid metals like mercury) are typically poorer conductors. : For porous materials like wood or insulation,
: Materials like expanded polystyrene (EPS) or rock wool are used in building envelopes to prevent heat loss in winter and heat gain in summer. : Materials like expanded polystyrene (EPS) or rock
: Heat is transferred through two main methods: lattice vibrations (phonons) and the movement of free electrons . Metals are generally excellent conductors because their free electrons can carry kinetic energy quickly across the material.