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| Heat exchangers are useful in transferring heat from hot fluid streams to a colder ones and are employed in a wide variety of thermodynamic devices including air-conditioners, refridgerators, freezers, engines, electronic devices, and in manufacturing. Traditionally, heat exhangers have been constructed of metals such as aluminum because of the relatively light weight, low cost, and high thermal conductivity of such materials. Problems that are associated with metallic heat exchangers, however, include their high rate of thermal expansion, which results in low life due to stresses at their joints, and the susceptibility to corrosion that metals exhibit. The use of composites offers the ability to overcome these drawbacks because composites can offer greater thermal conductivity, lower weight, and superior resistance to corrosion.Heat exchangers transferring heat hot fluid streams colder employed wide variety thermodynamic devices air-conditioners refridgerators freezers engines electronic manufacturing Traditionally exhangers metals aluminum relatively light weight cost thermal conductivity Problems associated metallic rates expansion life due stresses joints susceptibilities corrosion composites ability drawbacks greater superior resistance corrosionThis enables thereby traditional materials First higher better facilitate adjacent elements lighter compact similar capacity Second greatly prolonging operating third metalsThis teaches techniques effective lightweight durable machining thermally oriented blocks layering multiple sheets ribbed case machined fin arrays opposite sides layered subtantially parallel spaced integrally bonded ribs bars plates fins specially maximize passageways fluids flowing passagewaysIn construction predetermined depth Composite disposed Machined stacked integrated platesIn embodiment alternating first second sufficient accomplish overalltransfer two therethrough Two separated increased class carbon fiber polymeric resin matrix performance significantly compared conventional coefficient cross sectional circular linear square rectangular triangular diamond individual conductances coefficients components matched either reduce preferably primary axis anisotropic transverse plane platesFinally tchnology fabricating steps plurality planar inserting direction separating along position relation bonding fixedly |
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