Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1976-07-02
1979-05-29
Lazarus, Ronald H.
Heat exchange
Movable heating or cooling surface
Rotary drum
237 1A, 126271, G05D 2300, F24D 300, F24J 302
Patent
active
041564553
ABSTRACT:
A method of controlling a heating system includes regulating feed temperature of the heat carrying medium as a function of the differential between the feed medium temperature and the return medium temperature, and limiting the lower limit of the temperature of the feed medium to a predetermined minimum. An apparatus for carrying out the method includes first and second thermostats which determine feed and return medium temperatures and a control device responsive to the determined temperatures for adjusting feed medium temperature in accordance with the temperature difference. A further thermostat arrangement, in cooperation with a further control device, is provided for maintaining a minimum feed medium temperature, an auxiliary energy source being controlled by the further control device.
REFERENCES:
patent: 3768545 (1973-10-01), Wills
patent: 3931806 (1976-01-01), Hayes
patent: 3998207 (1976-12-01), Watt
patent: 4007776 (1977-02-01), Alkasab
patent: 4010734 (1977-03-01), Chayet
patent: 4027821 (1977-06-01), Hayes et al.
patent: 4031880 (1977-06-01), Devin
patent: 4034738 (1977-07-01), Barber, Jr.
Lall P. S.
Lazarus Ronald H.
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