Air Cooled Heat Exchanger Design

Similarly for relatively small air cooled heat exchangers the air flow may be horizontal across vertical tube bundles.

Air cooled heat exchanger design.

Other important heat exchanger components include those in the floating head assemblies supports and rectangular headers in air cooled exchangers. Fans in various duties where for reasons of control an air cooled heat exchanger. A heat transfer surface area per unit length of tube ft 2 ft a total exchanger bare tube heat transfer surface ft 2 aw average wall thickness in bwg birmingham wire gauge cp specific heat btu lb f cair ccold q t q t 2 t 1 air side heat capacity rate btu hr f 1 08 fv l w. The annual power requirement for an exchanger is a function of the means of air flow control the exchanger service the air temperature rise and the approach temperature.

The proximity of potential sources of warm air e g. These and other components are described in the heat exchanger design handbook. Furnaces should be considered when choosing the location of the air cooled heat exchanger and selecting the design temperature. Kays london s compact heat exchangers 1 contains measured heat transfer and pressure drop data on a variety of circular and rectangular passages including circular tubes tube banks straight fins louvered fins strip or lanced offset fins wavy fins and pin fins.

This document is intended to provide a guide to the process engineer who may be involved in the specification or operation of air cooled heat exchangers aches. Power requirements for air cooled heat exchangers can be lower than at the summer design condition provided that an adequate means of air flow control is used. Process design of air cooled heat exchangers air coolers project standards and specifications page 5 of 19 rev. It is concerned with such matters as choice of exchanger specification of duty.

01 april 2011 at least two fans shall be provided for each bay. In a typical air cooled heat exchanger the ambient air is either forced or induced by a fan or fans to flow vertically across a horizontal section of tubes. As a guide the in plant temperature may be 2 3 c over the local ambient temperature. This article will discuss air cooled compact heat exchanger design using published data.