Heating – Heat generator heats gas or liquid material in a flow structure – Material heated by mixing with combustion products of generator
Patent
1986-07-14
1988-04-12
Yuen, Henry C.
Heating
Heat generator heats gas or liquid material in a flow structure
Material heated by mixing with combustion products of generator
34230, 236 15BD, 98 315, 432 51, F24H 100, F27D 1900
Patent
active
047371030
ABSTRACT:
There is disclosed an environmental control system for a large volume structure (one horizontal dimension of at least 60 feet) having an air tempering unit including a horizontal cylindrical duct of about three feet diameter with an axial flow propeller fan and motor placed in one end to draw air through the duct and a gaseous fuel burner upstream from the fan with oxygen supplied from the air stream and with combustion products thereof being propelled through the fan. A series of propeller-fan air movers are placed in the structure near ceiling level with the first of the air movers placed about 25 to 50 feet in front of the air tempering unit. The air tempering unit and the air movers are operated by a control unit in response to a cycle timer and various sensor elements including an air velocity sensor for outside air supplied to the air tempering unit and an internal air temperature sensor. For warm or cool outside temperature the air tempering unit and air movers are operated approximately in unison for periods of thirty to one hundred eighty seconds for every 10 minutes. The burner is operated to provide heat when required to maintain the desired inside temperature. For very cold or hot outside temperatures the system runs continuously rather than periodically. In one embodiment an inside air intake supplies from one-tenth to eight-tenths of the air drawn through the fuel burner portion of the duct.
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Keegan Robert R.
Yuen Henry C.
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