Page 232 - Chemical Process Equipment - Selection and Design

202 HEAT TRANSFER AND HEAT EXCHANGERS

IDENTIFICATION I
PROBLEM

THE ELEMENTS WITHIN THIS
OUTLINE MAY BE DONE BY
BASIC HEAT HAND OR BY COMPUTER.

TENTATIVE SET OF
PARAMETERS
THE DESIGN
PARAMETERS
RATING OF THE DESIGN:
THERMAL PERFORMANCE
PRESSURE DROPS

COSTING. ETC

FLOW RATES RATING PROGRAM
F
OUTLET TEMPERATURES
TEMPERATURES Ir
PRESSURES 1. GEOMETRY CALCULATIONS (LENGTH
EXCHANGER CONFIGURATION 2. HEAT TRANSFER CORRE-
FLUID PROPERTIES LATIONS
FIXED)
FOULING FACTORS 3. PRESSURE DROP CORRE- LENGTH DROPS
LATIONS
PRESSURE

RATING PROGRAM
INITIAL OUTPUT:
LENGTH OF LARGEST
DIAMETER SHELL, FEWEST
TUBE PASSES. GREATEST
BAFFLE SPACING
YES

Figure 8.13. A procedure for the design of a heat exchanger, comprising a tentative selection of
design parameters, rating of the performance, modification of this design if necessary, and
re-rating to meet specifications (see also Bell, in Heat Exchanger Design Handbook, Section
3.1.3, Hemisphere Publishing Company, 1983).