F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
165/20
F28D 19/00 (2006.01) F26B 23/00 (2006.01) F28F 27/00 (2006.01)
Patent
CA 1308648
ABSTRACT OF THE DISCLOSURE: A heat recovery unit for use to preheat fresh air with hot air produced in an industrial process, such as the hot air exhaust from a dryer of a pulp and paper mill. The recovery unit makes use of water circulating from one air/water heat exchanger tank to another air/water heat ex- changer tank as heat transfer medium. Hot air whose heat is to be recovered at least in part, flows past a set of revol- ving discs of metal partially immersed in the water flowing in one of the heat exchanger tanks. The portions of the discs which are exposed to the hot air above the water level transfer the heat they recover to the flowing water. The water which is so heated passes into the other heat exchanger tank where it raises the temperature of an identical set of revolving discs which in turn heats a fresh air intake to provide warm air. The main advantage of this recovery unit is that the heat recovery conditions can be easily adjusted to fit any seasonal fresh air change. Such an adjustement can be carried out by varying one or more of the following factors: (1) ro- tation speed of the discs; (2) flow rate of the water in the heat exchanger tanks; and (3) depth of immersion of the discs in the water in the tanks.
555396
Cowan Ben
Robic
LandOfFree
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