HVAC-R Definitions
HVAC 101 Definitions
Atom – Is the smallest particle of an element.
BTU – The amount of heat required to raise the temperature of 1lb of water 1 degree F
Molecule – The smallest particle that a substance can be broken into and still retain its chemical identity.
Conduction – Is energy that travels from one molecule to another molecule.
Convection – To move heat from one location to another be means of current set up in a fluid medium.
Density – The weight per unit of volume of a substance.
Horsepower – Is 33,000lb to a height of 1ft in 1 min.
Mass – A material that occupies space and has weight.
Matter – A substance that occupies space and has a mass.
Latent Heat – Is heat energy absorbed or rejected when a substance is changing state and there is no change in temp.
Power – Is the rate of doing work.
Pressure - Force per unit of area.
Sensible Heat – Heat that causes a change in temperature.
Specific Heat – The amount of heat required to raise the temperature of 1lb of a substance 1 degree F.
Specific Gravity – The weight of a substance compared to the weight of an equal volume of water.
Specific Volume – The volume that each pound of a gas occupies.
Superheat – The temperature of a refrigerant above its saturation (change of state) temperature.
Radiation – Heat that passes through the air, heating solid objects that in turn heat the surrounding area.
Work – Is a force moving an object in the direction of the force.
Laws
Boyles Law – States that for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional.
Charles Law – The volume of a fixed mass of gas at constant pressure expands by a constant fraction of its volume at 0°C for each Celsius degree or kelvin its temperature is raised.
Daltons Law – States that the total pressure of a gas in a container is the sum of the partial pressures of the individual gases in the container.
Law of Conservation of Energy - Is that energy cannot be
Atom – Is the smallest particle of an element.
BTU – The amount of heat required to raise the temperature of 1lb of water 1 degree F
Molecule – The smallest particle that a substance can be broken into and still retain its chemical identity.
Conduction – Is energy that travels from one molecule to another molecule.
Convection – To move heat from one location to another be means of current set up in a fluid medium.
Density – The weight per unit of volume of a substance.
Horsepower – Is 33,000lb to a height of 1ft in 1 min.
Mass – A material that occupies space and has weight.
Matter – A substance that occupies space and has a mass.
Latent Heat – Is heat energy absorbed or rejected when a substance is changing state and there is no change in temp.
Power – Is the rate of doing work.
Pressure - Force per unit of area.
Sensible Heat – Heat that causes a change in temperature.
Specific Heat – The amount of heat required to raise the temperature of 1lb of a substance 1 degree F.
Specific Gravity – The weight of a substance compared to the weight of an equal volume of water.
Specific Volume – The volume that each pound of a gas occupies.
Superheat – The temperature of a refrigerant above its saturation (change of state) temperature.
Radiation – Heat that passes through the air, heating solid objects that in turn heat the surrounding area.
Work – Is a force moving an object in the direction of the force.
Laws
Boyles Law – States that for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional.
Charles Law – The volume of a fixed mass of gas at constant pressure expands by a constant fraction of its volume at 0°C for each Celsius degree or kelvin its temperature is raised.
Daltons Law – States that the total pressure of a gas in a container is the sum of the partial pressures of the individual gases in the container.
Law of Conservation of Energy - Is that energy cannot be