Heat Exchanger Designs and Selections

Download Acrobat (PDF) Specification Sheet CMS_Design_Selection.pdf (601kb)

Heat Exchanger Designs & Selections • Differential Thermal Expansion • Pass Arrangements for Flow Through Tubes
Shell Side Fluid Flow • Impingement Plates (based on application) • Maintenance and Servicing Considerations
Principal Components • Heat Exchanger Tubes • Materials of Construction • Economic Considerations in Heat Exchanger Selection
Heat Exchanger Rating versus Expected Loads • Fundamental Heat Transfer • Load is the Measure of Heat Transferred
A Combination of Three Factors Governs Load Capacity • Heat Transfer Coefficient (U) Depends on Many Variables
Area is the Total Effective Tube Area

Heat Exchanger Designs and Selections

Shell and Tube Heat Exchangers are simple devices with no moving parts which function on the principal that heat is exchanged between one fluid or vapor flowing through the tubes and another fluid or vapor flowing in the space around the tubes within the shell.

There are four basic considerations in choosing a mechanical arrangement that provides for efficient heat transfer between the two fluids or vapors, while taking care of such practical matters as preventing leakage from one into the other.

These are:
• Consideration for differential thermal expansion of tube and shell
• Means of directing fluid through the tubes
• Methods of controlling fluid flow through the shell
• Consideration for ease of maintenance and servicing

Various types of heat exchangers have been developed with different approaches to these fundamental design factors. The following will show how the three principal types of heat exchangers meet these design basics.

CMS Heat Transfer Division, Inc.

273 Knickerbocker Avenue ï¿½ Bohemia, NY 11716 USA

Tel: 631-968-0084 ï¿½ Fax: 631-968-0184 ï¿½ Email: info@cmsheattransfer.com

CMS Heat Transfer products include shell and tube heat exchangers, fixed tubesheet and u-tube exchangers, oil coolers, pre-heaters, condensers, after-coolers, steam converters, kettles, reboilers and evaporators. CMS engineering include custom heat exchanger, process and mechanical design services to all TEMA and ASME conformance requirements.

IMPORTANT DISCLAIMER: All information on this site is provided for reference. While we make effort to provide accurate information, CMS cannot be held responsible for errors either of omission or typographical.

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