a Flashcards
thermal occupant
definition
condition of mind which expresses satisfaction with the thermal environment
- the state where the person is entirely unaware of their surroundings
thermal energy
how heat moves
heat - form of energy that transfers from hot to cold
‘measurable’ physical factors
dry bulb air temperature, mean radiant temperature of surfaces, air movement ( velocity), relative humidity
personal factors
change how we retain heat
activity level, clothing insulation
- in debate - age/sex - change easily
temperature
definition
objective measures of heat contained in a body
intensity of heat measuring the average kinetic energy of molecules in a substance
radiation
definition
simple definition - radiation is the transfer of heat energy by electromagnetic waves
short wave radiation
temperature of surface
extremely hot surface
long wave radiation
temperature of surface
warm surface
only passes through glazing
best at emitting radiation and absorbing
material type
matte black
worst at emitting radiation and absorbing
material type
shiny silver
convection
transfer of heat energy through a material by the bodily (physical) movement of particles i.e. molecules which make up the material
- occurs in liquids + gases only
process
how do fluids heat the heat source
gain energy, become less dense + rise, forming a convection current, which heats the fluid completely
conduction
transfer of heat energy through a material without the molecules of the material changing their basic position
- solid, liquid + gases - more freq. in solids
transfer of heat particles colliding with each other
how does heat transfer
high temperature to low temperature
