US 2013/0092105 A1 · FLUE HAVING AN ADJUSTABLE FLUE GAS FLOW UNIT

Abstract

Known chimneys or chimney furnaces use flue gas flow units for heating buildings, said devices having displaceable or fixed obstacles for deflecting flue gas for generating flue gas turbulence. The invention relates to a device and method for transferring heat through a flue gas discharge pipe (28) in which (44, 45) pivotal guide plates (37) are inserted in the longitudinal direction of the pipe run, at which the flue gas flow (22) is more or less deflected in a sinuous line as function of the pivot angle (24) of the guide plates (37) that can be adjusted during furnace operation. A fan (19) can increase the flue gas flow (22). An optional furnace heat exchanger (29) generates additional hot water as needed. The controller (5) activates the actuators for the fan (19), guide plate pivot angle setting (24), and at least one circulating pump (10 or 11) as a function of the prescribed controlled variables such as flue gas temperature, reservoir temperature, heat exchanger performance, or flue gas flow.

Claims20

Dependent claims

1-14. (canceled)

A flue heat transfer system for transferring heat from a furnace heat source in a flue gas pipe, said flue heat transfer system comprising:

a heat exchanger integrated in a flue gas pipe and possessing a liquid media chamber, impinged by an all-enveloping flue gas flow, said heat exchanger comprising an inner and outer heat exchanger regions, and pivotal guide plates, said inner and outer heat exchanger regions being configured to be impinged by said flue gas flow, said pivotal guide plates are arranged spatially one behind the other in a longitudinal direction in said inner heat exchanger region;
wherein said guide plates are configured to deflect said flue gas flow from said inner heat exchanger region into said outer heat exchanger region up to an exterior wall of said flue gas pipe, such that, at low flue gas temperatures, said guide plates do not cause any deflections of said flue gas flow through said heat exchanger regions and that, with increasing flue gas temperatures, deflections of said flue gas flow as well as a resulting flue gas flow turbulences increase with decreasing angles of said guide plates.

A method of using a heat transfer system for transferring heat from a furnace heat source, said method comprising the steps of:

a) setting a flue gas flow while a furnace is heating up by one of manual operation, and automatic control operation;
and
b) setting a rotational speed of ventilation and an angular position of guide plates in a heat exchanger integrated in a flue gas pipe of said furnace by one of stepwise, and continuously;
wherein said guide plates are configured to deflect said flue gas flow from an inner heat exchanger region into an outer heat exchanger region up to an exterior wall of said flue gas pipe, such that, at low flue gas temperatures, said guide plates do not cause any deflections of said flue gas flow through said heat exchanger regions and that, with increasing flue gas temperatures, deflections of said flue gas flow as well as a resulting flue gas flow turbulences increase with decreasing angles of said guide plates.

1 more element

Dependencies are inferred from the claim text.

Flue having an adjustable flue gas flow unit

Life of this patent

Flue having an adjustable flue gas flow unit

Life of this patent

Abstract

Claims20