By Detlev Kroger
This new textual content represents the main specific and accomplished booklet providing sleek perform and thought appropriate to the thermal-flow functionality assessment, layout, and optimization of air-cooled warmth exchangers and cooling towers. Kroger presents glossy analytical and empirical instruments used to guage the thermal-flow functionality and layout of air-cooled warmth exchangers and cooling towers. He additionally covers the way to arrange more advantageous necessities and review extra serious bids with appreciate to thermal functionality of latest cooling structures. additional, Kroger explores development chances with admire to retrofits of present cooling devices in addition to attainable affects of plant operations and environmental impacts
Read or Download Air-cooled Heat Exchangers And Cooling Towers: Thermal-flower Performance Evaluation And Design, Vol. 2 PDF
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Extra resources for Air-cooled Heat Exchangers And Cooling Towers: Thermal-flower Performance Evaluation And Design, Vol. 2
24) and The effective area, Ae3, corresponds to the frontal area of the heat exchanger bundles if they are installed horizontally. In the case of an array of A-frames, Ae3 corresponds to the projected frontal area of the bundles. 23. However, if the flow resistance of the heat exchanger support structure, Khes, is not considered separately, this value is realistic. 3, where the heat exchangers are arranged vertically around the circumference at the base of the tower. qxd 6/14/04 2:47 PM Page 48 AIR-COOLED HEAT EXCHANGERS AND COOLING TOWERS Fig.
Meyer and Kröger show this is not the case. 4. Both the energy correction factor and the recovery coefficient depend on numerous geometric and operating variables. 542 m diameter • bell-type, inlet casing • 960 rpm and 750 rpm operating speeds (at or near the point of maximum fan efficiency) Their tests included heat exchangers made up of different types of industrial finned tube bundles. 599. 8. Fig. 22. If the outlet of the fan is flush with the plenum chamber wall, xFhe = Hpᐉ where Hpᐉ = the plenum height Due to the recovery of kinetic energy, V/Vcd > 1 for xFhe ≥ xcr, despite the fact that αe > 1.
The result is a corresponding reduction in cooling tower performance. Where specific information on fouling is available, this can be incorporated directly in the design. 1. The heat exchanger bundles are located horizontally at the inlet cross section of the tower. The density of the heated air inside the tower is less than the density of the atmosphere outside the tower. As a result, the pressure inside the tower is less than the external pressure at the same elevation. This pressure differential causes air to flow through the tower at a rate dependent on the various flow resistances encountered, the cooling tower dimensions, and the heat exchanger characteristics according to Buxmann, Moore and Hsieh, Moore, Montakhab, and Becker.
Air-cooled Heat Exchangers And Cooling Towers: Thermal-flower Performance Evaluation And Design, Vol. 2 by Detlev Kroger