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Eclipse ThermJet Design Guide No. 205, 3/5/07
Table of contents
1
2
3
Introduction
Product Description .......................................................................... 6
Figure 1.1 The ThermJet Burner ..................................................... 6
Safety
Introduction ........................................................................................ 7
Safety ..................................................................................................... 7
Capabilities ......................................................................................... 8
Operator Training ............................................................................... 8
Replacement Parts ............................................................................. 8
System Design
Design ................................................................................................... 9
Step 1: Burner model selection ....................................................... 9
Step 2: Control Methodology .......................................................... 10
Figure 3.1: Modulating gas & air:
On-ratio control or excess air @ low re ............................ 12
Figure 3.2: Modulating gas with xed-air control ...................... 13
Figure 3.4: High/Low gas with xed-air control ........................ 15
Step 3: Ignition System ..................................................................... 16
Figure 3.5: Bypass start gas circuit schematics ........................... 17
Step 5: Combustion Air System: Blower
and air pressure switch ............................................................. 19
Table 3.1: Required calculation information ................................ 20
Table 3.2: Fuel gas heating values ................................................... 20
Example blower calculation ............................................................. 21
Step 6: Main gas shut-off valve train .............................................. 22
Step 7: Process Temperature Control System ............................ 22
Appendix
Conversion Factors ........................................................................... 23
Key to System Schematics ............................................................... 24