Heat exchange – Structural installation
Patent
1988-07-28
1990-10-02
Ford, John
Heat exchange
Structural installation
165 46, 165 51, 165 95, 165154, 165905, 165916, 165 41, 123 4133, 1841043, F28D 710, F28F 142, F28F 2106
Patent
active
049601679
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a heat exchanger for effecting an exchange of heat between two liquid media and being of the kind set forth in the preamble of the following claim 1.
The inventive heat exchanger has been developed primarily for heat-exchange between two media in those cases where at least one of the media involved is contaminated and/or is liable to cause deposits or coatings to form on the wall surfaces of the medium-flow channels.
When contaminated, or impure, liquid media, such as sea water for example, are used for cooling purposes, for instance to cool the engines of watercraft, there is a serious risk that the heat exchanger channels through which the water flows will become blocked and that coatings or deposits may form on the wall surfaces of the channels and therewith on the heat-transfer contact surfaces of the heat exchanger. Both of these phenomenon impair the heat-exchange function of the heat exchanger. In order to reduce the risk of blockaging, the heat-exchange flow channels for the medium in question must be given large flow areas, which increases the volume of the heat exchanger and lowers its effectiveness. There is at present no satisfactory method of preventing coatings or deposits from forming on the walls of the flow channels, and consequently it is necessary, at regular intervals, either to clean the heat-transfer surfaces or to replace the entire heat exchanger. The only alternative in this regard is to so over-dimension the heat exchanger that it will provide an acceptable heat-exchange effect even when the heat-transfer surfaces are thickly coated. The degree of contamination of impure media, such as sea water for example, will often vary widely and rapidly, and hence when such media is used for heat exchanging purposes, there is a significant risk that the heat exchanger will become blocked and lose its effectiveness. One example in this context are heat exchangers intended for the engines of powered watercraft, which in unfavourable circumstances may be supplied with cooling water which is so highly contaminated as to block or clog the heat exchanger.
The object of the present invention is to provide a heat exchanger of the kind disclosed in the introduction which has, from the aspect of heat transfer, relatively effective flow channels which present comparably small flow areas, but which nevertheless have only a slight tendency to become blocked or coated on the contact surfaces and with which the blockages and coatings can be cleared by external manipulation without needing to dismantle the heat exchanger, therewith enabling at least one of the media used in the heat exchanger to be contaminated and/or of a kind which will give rise to coatings or deposits. Another object of the invention is to render such a heat exchanger proof against freezing when the comtaminated and/or coating-engendering medium used is water, without addition of anti-freeze substances, which is the normal practice, for instance in the case of heat exchangers which are used to cool watercraft engines with the aid of sea water.
These objects are achieved by means of a heat exchanger which is constructed in accordance with the following claims.
The invention will now be described in more detail with reference to the accompanying drawing which illustrates schematically and by way of example a conceivable and advantageous embodiment of the inventive heat exchanger, and in which
FIG. 1 is a side view, partly in axial section, of the inventive heat exchanger, and
FIG. 2 is a partial, radially sectioned view of the heat exchanger in larger scale.
The illustrated exemplifying embodiment of the inventive heat exchanger is intended, for instance, for cooling the cooling water or oil circulating in the engines of powered watercraft, with the aid of sea water as a coolant.
The heat exchanger includes a tube 1 which is substantially of circular cross-section and the axial ends of which are open. Tho tube forms a liquid-impervious partition wall which separates the two media, of which one medium flows
REFERENCES:
patent: 2943845 (1960-07-01), Jaklitsch
patent: 3105708 (1963-10-01), Esty
patent: 3374066 (1968-03-01), Farrant
patent: 3731731 (1973-05-01), Kyvsgaard et al.
patent: 3802491 (1974-04-01), Plank, Jr. et al.
patent: 3934618 (1976-01-01), Henderson
patent: 4345644 (1982-08-01), Dankowski
patent: 4461347 (1984-07-01), Layton et al.
patent: 4502533 (1985-03-01), Nielson
patent: 4778002 (1988-10-01), Allgauer et al.
Ford John
Hypeco AB
LandOfFree
Heat exchanger does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat exchanger, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat exchanger will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-288176