Titlebook: Design and Operation of Heat Exchangers; Proceedings of the E Wilfried Roetzel,Peter John Heggs,David Butterwort Conference proceedings 199

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Approximate Equations for the Design of Cross- Flow Heat Exchangersexchangers. Approximate equations for the thermal calculation of these flow arrangements with arbitrary numbers of passes are proposed. Their accuracy and limitations are discussed. The accuracy of the given equations is more than sufficient for practical design.

GUILE

Numerical Studies of a Compact Fin-Tube Heat Exchangershow that at low Reynolds number (~ 400) the Nusselt number in the neighborhood of the second tube of a two-tube in-line configuration is close to the Nu given by the periodically fully developed flow.

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Compact New Formulae for Mean Temperature Difference and Efficiency of Heat Exchangersen presented by the author[1, 2]. The advantages of these new formulae in the calculations required in thermal design of heat exchangers will be demonstrated for a number of flow configurations. Shell-and-tube exchangers with multiple passes, with split flow and two tube passes, as well as a number

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RALES

fixed-joint

infatuation

Simple Algorithms for Optimization of Shell and Tube Heat Exchangerspling between the geometry and the heat transfer in the near-optimal region of the feasible design space irrespective of the objective function used. Hence, the algorithm is quite general in nature and can handle various objective functions like weight, cost and volume. A decision table is provided

progestin

Dispersion Model for Divided-Flow Heat Exchangerss flow rate on the shellside, variable entrance location of the shellside flow and piecewise variation of heat transfer coefficient (or NTU), considering shellside maldistribution such as bypassing and leakage. Especially, the explicit formulas for calculating thermal effectivenesses as well as tem

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Approximate Equations for the Design of Cross- Flow Heat Exchangersexchangers. Approximate equations for the thermal calculation of these flow arrangements with arbitrary numbers of passes are proposed. Their accuracy and limitations are discussed. The accuracy of the given equations is more than sufficient for practical design.