Industrial refrigeration A Flashcards
refrigerant in screw compressor
propane
liquified overfeed systems in meat packing plants use screw compressor. the refrigerant used
ammonia
heat transfer through physical contact of the molecules to substance
conduction
heat transfer by moving matter
convection
heat transfer by electromagnetic waaves
radiation
matter is packed close together and vibrate slowly
solid
matter with molecules further apart and slide over one another and vibrate faster
liquid
matter with molecules farthest apart they sly away from each other and vibrate quite rapidly
gas
heat cannot be measured with a thermometer
latent heat
heat can be measured with a thermometer
sensible heat
energy that is in motion doing work
kinetic
energy is at rest and is capable of doing work
potential
high pressure side of refrigeration system
compressor, condenser, metering device
low pressure side of refrigeration system
metering device, evaporator, compressor
refrigeration cycle
compress, condense, expand, evaporates