Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1974-05-29
1976-05-04
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
60527, 165 2, F03G 706
Patent
active
039539733
ABSTRACT:
The present invention introduces a heat engine, or a heat pump, in which the working medium used is subjected alternatively to solidification and melting operations. A working medium so used is referred to as an S/L type working medium. In a new heat engine, an S/L type working medium is subjected to cyclic operations, each cycle comprises of a high temperature melting step conducted under a first pressure, and a low temperature solidification step conducted under a second pressure. In a new heat pump, each cycle comprises of a high temperature solidification step conducted under a first pressure and a low temperature melting step conducted under a second pressure. When a non-aqueous medium is used, the first pressure and the second pressure are a relatively high pressure and a relatively low pressure, respectively. When an aqueous medium is used the two pressures are a relatively low pressure and a relatively high pressure, respectively. it is noted that the operation of a heat pump is the reverse operation of a heat engine.
REFERENCES:
patent: 2215157 (1940-09-01), Platzner
Cheng Chen-Yen
Cheng Sing-Wang
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