Heat exchange – Regenerator
Patent
1984-06-18
1985-12-17
Davis, Jr., Albert W.
Heat exchange
Regenerator
165 10, 137309, F28D 1700
Patent
active
045587310
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with a control device for medium flows for a regenerative heat exchanger, in which the control device is placed between ductings which are divided into medium flow ducts by means of at least one partition wall.
There are two main types of heat exchangers, recuperative and regenerative. In the former type, the heat is transferred from one medium flow to the other through the walls in the heat exchanger. In the latter one, on the other hand, a heat accumulating material in the cell of the heat exchanger is charged with the heat energy of the warm flow, and thereupon the charge is discharged by passing a cold flow into contact with the charged material. It results from the principle of operation of the regenerator that either the heat faces must be mobile, e.g. rotating designs, or the medium flows must be controlled periodically along different routes.
A rotating, regenerative heat exchanger is known, e.g., from the German Pat. No. 881,046, wherein a cell wheel placed in a casing is provided with through openings that contain radial wires that accumulate heat. The casing and the wheel are provided with control wings which guide the cold and warm air flows via the charging wires depending on the position of the wheel. A drawback of such a device is low heat accumulating capacity and complicated construction. Moreover, sealing of the passages of the air flows causes problems.
Air flows can be controlled along different routes by means of flow-exchange valves, but such an apparatus requires fairly high capacities of actuating devices and causes high investment costs in relation to the overall cost of the equipment. In such devices, in which air flows are guided alternatingly along different routes, the cell of the heat exchanger is, e.g., in a two-duct system, divided into two parts, cold and warm air being alternatingly passed through different parts.
The object of the present invention is to provide a control device for medium flows which is of a very simple construction and inexpensive and in which efficient sealing can be achieved easily. The control device in accordance with the invention is characterized in that the medium-flow control device consists of a cell that is divided into compartments by means of partition walls parallel to the medium flows and substantially transverse to the partition wall between the ductings and whose ends are provided with plate elements substantially transverse to the medium flows, at least one of the said plate elements being displaceable substantially in the transverse direction of the partition walls of the cell and the said plate elements being provided with alternatingly located through openings and blocking members, whose area corresponds to the area of the opening between one medium-flow duct and at least one compartment in the cell. Thus, the control device in accordance with the invention consists of a cell divided into compartments and of plate elements connected to the ends of the cell, the said elements guiding the flowing medium out of the inlet ducting into the desired compartment and from there again into the desired flow duct. In order that it should be possible to make the medium flow through different ducts, at least one of the plate elements is displaceable. It is to be noticed that this control effect is achieved by means of a simple device which requires little space and only a low-power actuating device.
According to a preferred embodiment of the invention, the cell of the control device consists of a heat exchanger, which is divided into compartments by means of partition walls, whereat the plate elements are placed at the ends of the heat exchanger. In this embodiment, the control device requires particularly little space in the longitudinal direction of the heat exchanger, because the length of the heat exchanger is increased only by the thickness of the plate elements. The plate element or elements can be displaced readily in the transverse direction of the partition walls, and they can be sealed easily in relatio
REFERENCES:
patent: 1739507 (1929-12-01), De Lorenzi
patent: 1759916 (1930-05-01), Riley
patent: 1811455 (1931-06-01), Cook
Pentikainen Ismo
Pentikainen Seppo
Pentikainen Timo
Davis Jr. Albert W.
Orpocon Oy
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