Heat exchanger system and method
a heat exchanger and heat exchanger technology, applied in the field of heat exchangers, can solve the problems of difficult manufacturing and relatively expensive heat exchangers of shell and tube types, and achieve the effects of reducing costs, increasing heat transfer per cost, and relatively inexpensive heat exchangers
Inactive Publication Date: 2005-03-24
TEXAS A&M UNIVERSITY
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention provides a heat exchanger with a sheet assembly that can simultaneously benefit from the advantages of shell and tube heat exchanges and plate and frame heat exchangers. The sheet assembly is disposed within the shell, which allows for the use of high-pressure fluids and decreases the cost as compared with prior heat exchangers. The heat exchanger has a lower pressure drop and may utilize polymers to form the sheet assembly for increased cost-effectiveness and corrosion-resistance.
Problems solved by technology
However, shell and tube heat exchangers can be relatively expensive and difficult to manufacture.
Method used
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Embodiment Construction
FIG. 1 illustrates a low-pressure vapor-compression evaporator system 2 performing desalination of salt water. A salt-containing feed 3 flows into an evaporator tank 4, which in this embodiment is operated under vacuum. Although, in the illustrated embodiment, feed 3 is a salt-containing feed, a sugar-containing feed or suitable feed is also contemplated by the present invention. The salt-containing feed 3 boils, producing low-pressure vapors. These vapors are removed from evaporator tank 4 using a jet ejector 5. The pressurized vapors exiting jet ejector 5 flow into a heat exchanger 6, where they condense. Because of the interaction of heat exchanger 6 and evaporator tank 4, the heat of condensation provides the heat of evaporation needed by the salt-containing feed 3. Distilled liquid water 7 is recovered from heat exchanger 6 in any suitable manner, and concentrated salt solution 8 is removed from evaporator tank 4 using any suitable devices. The motive steam 9 added to jet eject...
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A heat exchanger includes a shell and a sheet assembly disposed within the shell. The sheet assembly may include a number of substantially parallel rectangular sheets configured such that they define first passageways extending generally in a first direction and second passageways extending generally in a second direction perpendicular to the first direction. The sheet assembly may be configured such that communicating a first fluid through the first passageways and communicating a second fluid through the second passageways causes heat transfer between the first and second fluids. For example, the first fluid may comprise high pressure vapor and the second fluid may comprise a liquid solution such that the communicating the high pressure vapor and the liquid solution through the first and second passageways, respectively, causes at least a portion of the high pressure vapor to condense and at least a portion of liquid solution to boil off.
Description
TECHNICAL FIELD OF THE INVENTION This invention relates in general to heat exchangers and, more particularly, to a heat exchanger having a sheet assembly disposed within a shell. BACKGROUND OF THE INVENTION Heat exchangers generally transfer heat energy from one fluid to another fluid without mixing the two fluids. As used herein, the term “fluid” may refer to liquids, gasses, vapors, or any other fluid substance. Common applications of heat exchangers include automotive radiators, boilers, furnaces, refrigerators and air conditioning systems. Two common types of heat exchangers are (1) shell and tube heat exchangers; and (2) plate and frame heat exchangers. Shell and tube heat exchangers may be used in applications where high temperature and pressure demands are significant, since a shell may be designed to withstand relatively high pressures. However, shell and tube heat exchangers can be relatively expensive and difficult to manufacture. Plate and frame heat exchangers are oft...
Claims
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IPC IPC(8): F04F5/46F04F5/54F28D9/00
CPCF04F5/466F28D9/0037F04F5/54F04F5/467
Inventor HOLTZAPPLE, MARK T.
Owner TEXAS A&M UNIVERSITY