| abido |
A measure of the amount of
light reflected by a body (typically a solar body like a
planet or a moon |
| carnot efficiency |
A measure of the maximum
amount of work that can be derived from an ideal heat
engine. The theoretical maximum efficiency of an engine
is given by the equation:
Percentage of energy converted to work = (1 -
Tcold / Thot) * 100
where Thot is the temperature of the
hot side in deg K
and Tcold is the temperature of the
cold side in deg K |
| Stirling Engine |
A type of thermo-mechanical
engine that does mechanical work as a result of heat
transfer. The Striling engine (sometimes called an,
"Air Engine") is a sealed device in which a
gas (air) is alternately heated and cooled. This cycle
can by made to operate near the theoretical efficiency
limits of a heat engine by incorporating a thermal
recovery system in which the heat of the previous cycle
is used in the subsequent expansion phase. This creates
a nearly thermally reversible cycle. The Stirling engine
was created to make thermal engines safer as it was
developed during the period of steam engines when boiler
failure could be catastrophic. The Stirling engine
has proven less practical to date as a result of
materials limitations on the hot side of the engine. The
Stirling cycle is most commonly used today convert
mechanical energy to cooling of cryogenic gases. |
| TEC |
Thermo Electric Cooler - A
device that uses electrical current passed through
dissimilar metals (or semiconductors) to move heat from
one side of the device to the other. The name effect
utilized by this device is called the "Peltier"
effect. The effect function is called the "Seebeck"
effect. |
| TEG |
Thermo Electric Generator -
A device that generates an electrical current as heat
moves from the hot side of the device to the cold side.
The name of the effect utilized by this device is the
"Seebeck" effect. |
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