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Eclipse Extern-A-Therm Recuperators, Design Guide 540, 3/9/2009
Introduction
Product Description
The Extern-A-Therm recuperators are compact tubular
air-to-air heat exchangers designed to recover the waste
heat in industrial exhaust gases. The recovered heat is
used to preheat the combustion air for the system’s
burners, thereby increasing the thermal efficiency. To
ensure that all the wasted heat is drawn across the
recuperator tubes, the recuperator is typically mated with
an Eclipse eductor.
The single-ended design of the Extern-A-Therm
recuperator allows for free expansion of the recuperator
tubes; no expansion joints are required.
The design of the Extern-A-Therm, housing and eductor
ensure ease of installation and efficient use of existing
pipe work. The housings are internally insulated; there is
no need for additional external insulation.
Figure 1.1. Extern-A-Therm Recuperator
Audience
This manual has been written for people who are already
familiar with all aspects of industrial heating equipment
design.
These aspects are:
• Design/Selection
• Use
• Maintenance
The audience is expected to have previous experience
with this type of equipment.
Extern-A-Therm Documents
Design Guide No. 540
• This document
Datasheet, Series No. 540-1 through 540-4
• Available for individual Extern-A-Therm models
• Required to complete design calculations in this
guide
Related Documents
• EFE 825 (Combustion Engineering Guide)
• Eclipse Bulletins and Info Guides: 610, 710, 720,
730, 742, 744, 760, 930
Purpose
The purpose of this manual is to ensure that the design of
a safe, effective, and trouble free system is carried out.
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