Thermodynamics

Download Heat Exchangers : Selection, Rating, and Thermal Design, by Sadik Kakaç, Hongtan Liu, Anchasa Pramuanjaroenkij PDF

By Sadik Kakaç, Hongtan Liu, Anchasa Pramuanjaroenkij

Praise for the Bestselling moment Edition

The first version of this paintings accrued in a single position the essence of significant info previously scattered in the course of the literature. the second one version provides the subsequent new details: introductory fabric on warmth move enhancement; an software of the Bell-Delaware strategy; new

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Praise for the Bestselling moment Edition

The first version of this paintings accrued in a single position the essence of vital details previously scattered during the literature. the second one variation provides the next new info: introductory fabric on warmth move enhancement; an software of the Bell-Delaware strategy; new correlation for calculating warmth move and friction coefficients for chevron-type plates; revision of a few of the solved examples and the addition of numerous new ones.
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Additional resources for Heat Exchangers : Selection, Rating, and Thermal Design, Third Edition

Example text

Two-phase heat transfer could also occur on both sides of the heat exchanger such as condensing on one side and boiling on the other side of the heat transfer surface. However, without phase change, we may also have a two-phase flow heat transfer mode as in the case of fluidized beds where a mixture of gas and solid particles are transporting heat to or from a heat transfer surface. 6 Flow Arrangements Heat exchangers may be classified according to the fluid-flow path through the heat exchanger.

This type of heat exchanger is mainly intended for condensing vapors with subcooling of condensate and noncondensable gases. The top cover, therefore, has a special distribution cone where the vapor is distributed to the uncovered spiral turns in order to maintain a constant vapor velocity along the channel opening. For subcooling, the two to three outer turns of the vapor channel are usually covered, which means that a spiral flow path in countercurrent to the cooling medium is obtained. The vapor–gas mixture and the condensate are separated, and the condensate then flows out through a downward connection to the periphery box while the gas through an upward connection.

In multipass condensers, it is important to have each successive pass occurs below the previous one to enable the condensate to continue downwards. 5 Heat Transfer Mechanisms Heat exchanger equipment can also be classified according to the heat transfer mechanisms as 1. Single-phase convection on both sides 2. Single-phase convection on one side, two-phase convection on other side 3. 1e–g. 1f and g illustrate two possible modes of two-phase flow heat exchangers. 1g, fluid A is being condensed, giving up heat to fluid B.

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