Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1989-08-30
1994-08-02
Davis, Jr., Albert W.
Heat exchange
Movable heating or cooling surface
Rotary drum
165 39, 165 40, 16510414, 16510425, 16510427, 126590, 126588, 123 4126, 123 4121, F28D 1502, F28F 2700
Patent
active
053336771
ABSTRACT:
Various techniques are disclosed for improving systems that include an evacuated, and in essence hermetically-sealed, fluid circuit containing a heat-transfer fluid which--while circulating, usually with the assistance of a pump, around the fluid circuit--absorbs heat, primarily by evaporation, from a heat source and releases the absorbed heat, primarily by condensation, to a heat sink; the maximum temperature of the heat sink being, at a given instant in time, lower than the maximum temperature of the heat source at that instant in time.
The various techniques disclosed always furnish the fluid circuit with a property named `self-regulation`; and, where applicable, with one or more properties named `overpressure protection`, `freeze protection`, `heat-absorption control`, `heat-release control`, and `heat-source control`.
Self-regulation ensures, by controlling heat-transfer flow around the fluid circuit, that the fluid circuit transfers heat efficiently over a preselected range of operating conditions comprising a preselected range of evaporation rates which includes at least two evaporation rates differing significantly from each other.
REFERENCES:
patent: 2110774 (1938-03-01), Privett
patent: 2845472 (1958-07-01), Narbut
patent: 3845628 (1974-11-01), Bronicki et al.
patent: 4314601 (1982-02-01), Giuffre et al.
patent: 4476922 (1984-10-01), Heilig, Jr. et al.
patent: 4771824 (1988-09-01), Rojey et al.
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