Heat exchange – Three non-communicating fluids
Patent
1997-04-11
1998-12-08
Kamen, Noah P.
Heat exchange
Three non-communicating fluids
122 7R, F22G 100
Patent
active
058457038
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a heat recovery system. More particularly, it relates to a heat recovery system for a heat transfer between fluids.
BACKGROUND ART
Heat recovery systems of the above mentioned general type are known in the art. In known heat recovery systems one fluid is supplied through a tube bundle arranged in a shell of a heat recovery system, while the other fluid is supplied into the shell of the heat recovery system so that a heat transfer is performed between the two fluids. It is important to increase the heat transfer rate between the fluids.
DISCLOSURE OF THE INVENTION
Accordingly, it is an object of the present invention to provide a heat recovery system which has an improved heat transfer rate between the fluids.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention of the resides, briefly stated, in a heat recovery system which includes two tube bundles for circulation of a first fluid and a second fluid, and a shell which accommodates the tube bundles and through which a third fluid is circulated to be brought into a heat transfer with the first mentioned two fluids, so that a heat transfer between three fluids is performed.
When the heat recovery system is designed in accordance with the present invention, it provides for a substantially increased heat transfer rate between the fluids.
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 of the drawings is a view schematically showing a heat recovery system in accordance with the present invention;
FIG. 2 is a view showing further details of the inventive heat recovery system;
FIG. 3 is a view showing the heat recovery system with a U-shaped shell;
FIG. 4 is a view showing the heat recovery system with the shell and tube bundles located in a tank separator;
FIG. 5 is a view showing the heat recovery system with a U-shaped shell arranged in a tank separator and with a recirculating pump;
FIG. 6 is a view showing the heat recovery system with a vapor cooled in one tube bundle;
FIG. 7 is a view showing the heat recovery system with a heating fluid circulating inside the shell to heat two other fluids;
FIG. 8 is a view showing the heat recovery system with a heat exchange between two fluids having the same phase;
FIG. 9 is a view showing the heat recovery system with independent flows of two fluids;
FIG. 10 is a view showing the heat recovery system with a recirculation of a third fluid;
FIG. 11 is a view showing the heat recovery system with coaxial tube bundles arranged in a storage tank; and substantially corresponding to FIG. 11 but having a different circulation.
FIG. 12 is a view showing a further embodiment of the invention.
BEST MODE OF CARRYING OUT THE INVENTION
A heat recovery system in accordance with the present invention is shown in general in FIG. 1. The system includes a source of a two-phase flow which can be for example a boiler. A tank separator 2 is connected to the source of the two-phase flow, in which the flow is subdivided into two fluids having different phase states, in particular into liquid and vapor. If the source 1 is a boiler, the tank separator 2 subdivides the liquid supplied from the boiler into a blow down water and a flush steam. The system is provided with a shell and two tube bundles identified as a whole with reference numeral 3. The liquid (the blow down water) is supplied from the tank separator into a left part 3' of the heat recovery system which is provided with a first tube bundle, and flows through the tube bundle so as to be discharged at the end, for example into a sewage. The fluid supplie
REFERENCES:
patent: 573111 (1896-12-01), Shepard
patent: 686313 (1901-11-01), Mann
Kamen Noah P.
Zborovsky Ilya
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