Compact heat exchangers / W.M. Kays, A.L. London - Details - TroveCompact Heat Exchangers: Selection, Design, and Operation, Second Edition, is fully revised to present the most recent and fundamental ideas and industrial concepts in compact heat exchanger technology. This complete reference compiles all aspects of theory, design rules, operational issues, and the most recent developments and technological advancements in compact heat exchangers. New to this edition is the inclusion of micro, sintered, and porous passage description and data, electronic cooling, and an introduction to convective heat transfer fundamentals. New revised content provides up-to-date coverage of industrially available exchangers, recent fouling theories, and reactor types, with summaries of off-design performance and system effects and installations issues in, for example, automobiles and aircraft. Hesselgreaves covers previously neglected approaches, such as the Second Law of Thermodynamics , pioneered by Bejan and co-workers. The justification for this is that there is increasing interest in life-cycle and sustainable approaches to industrial activity as a whole, often involving exergy Second Law analysis. Heat exchangers, being fundamental components of energy and process systems, are both savers and spenders of energy, according to interpretation.
Compact Heat Exchangers
Science Magazine, Figure 5. A further related point is that the friction factor used is that of Fanning, which is one quarter of the Moody factor used predominantly in the USA? Note that since the olndon is derived from the core mass velocity equation, the face area is largely independent of surface type.A typical range of hydraulic diameters is from mm. The fluid passages are Figure 2. Basic concepst in heat exchangers, uses, shape and weight. In addition to the basic design theo.
The second term is the sum of available work or exergy contents of the 1. This then promotes the formation and groxyth of bubbles. DUCTS The continuous duct is perhaps the most important class of surface for compact exchangers, encompassing plain circular tubes to the very compact polygonal passages of gas turbine rcgenorator matrices. This proportion varies widely in different heat exchanger passage geometries.
Initial observation of equation 3. As hydraulic diameter is progressively reduced, in view of the above, especially for process exchangers. The function of secondary surfaces fins It is instruc? HI NUx!
embodiments and applications are disclosed utilizing a plurality of thermoelectric modules or thermoelectric elements sandwiched between heat exchangers.
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Handbook of Thermal Science and Engineering pp Cite as. This chapter offers a concise review of a limited selection of topics involving an important family of heat exchangers called compact heat exchangers. Compact heat exchangers are thermal devices inherently present in many systems that feature an involvement of a single or multiple fluid streams exchanging thermal energy at differing temperatures but characterized by a large compactness. The concept of compactness refers to the magnitude of the heat transfer surface area scaled by the corresponding heat exchanger core volume. This chapter includes i descriptions of major types of compact heat exchangers, ii the construction details specific for compact heat exchangers, and iii design problems formulations. Skip to main content. Advertisement Hide.
Then equation 4! Bergles and F. The… Documents. Those relationships arc best illustrated by means of an example. Thonon, V.
The baffle visible is to aid distribution of the flow between ports. Other aspects of installation are dealt with more fully in chapter 7. Clearly, for the intermediate case of developing laminar flow, a superior performance to the equivalent shell side of a tubular unit. The corrugated crossflow side has parallel channels a.
Heat Mass Transfer; Download preview PDF. The heat of reaction is matched by heat addition or removal by the secondary stream. The films have a corrugation width of 2mm and height of l mm.