Increasing Heat Exchanger Performance

Increasing heat Exchanger Performance KEVIN M. LUNSFORD, Bryan Research & Engineering, Inc., Bryan, Texas INTRODUCTION Increasing heat Exchanger Performance usually means transferring more duty or operating the Exchanger at a closer temperature approach. This can be accomplished without a dramatic increase in surface area. This constraint directly translates to Increasing the overall heat transfer coefficient, U. The overall heat transfer coefficient is related to the surface area, A, duty, Q, and driving force, T. This equation is found in nearly all heat Exchanger design references1-3. As stated in this form, U can be calculated from thermodynamic considerations alone.

For shell-and-tube exchangers, the area is usually the outside surface of the tubes. Table 2 shows design overall heat transfer coefficients for some common shell-and-tube exchanger conditions3. These coefficients do not necessarily represent final designs but are sufficient for estimating purposes. The

Loading..

Tags:

  Design, Tubes, Heat, Exchanger, Shell, And tube, And tube exchangers

Information

Related search queries