# Step 2: Tube Design - Honeywell Eclipse ImmersoJet Design Manual

Iron Phosphate Solutions
These are susceptible to the same problem described
above for zinc phosphate solutions. To reduce early tube
failure, make the immersion tube with stainless steel.
Electro-polishing is not required. Limit the burner to the
capacity shown in the limited capacity portion of Table 3.2
where capacity is based on tube size.
Cooking Oils
To avoid burning the oil, limit heat flux to 50 Btu/h per in
of the tube area.
Table 3.2 Capacity Guide
Low-Pressure
Tube
Model
Size,
in (mm)
IJ-2
2 (50)
190,000 (55)
IJ-3
3 (80)
440,000 (129)
IJ-4
4 (100)
800,000 (234)
IJ-6
6 (150)
2,000,000 (586)
IJ-8
8 (200)
3,200,000 (938)

## Step 2: Tube Design

Determine Effective Tube Length
Find the required effective tube length using the
previously selected tube efficiency, net heat input values,
and Figures 3.1 or 3.2. The effective length of a tube is the
total centerline length of the tube covered by liquid.
32-00069—01
High-Pressure
Packaged
Packaged
Blower,
Blower,
Btu/h (kW)
Btu/h (kW)
235,000 (69)
550,000 (161)
1,000,000 (293)
2,400,000 (703)
N/A
Highly Viscous Liquids
All immersion systems depend on natural convection
currents to carry heat away from the tube and throughout
the tank. Convection is minimal in high viscosity solutions
such as asphalt, residual oil or molasses. This can
severely overheat the liquid around the tube.
2
■ Do not use the ImmersoJet for highly viscous
fluids.
Select Burner Model
Choose a burner model with a maximum capacity greater
than the gross burner input calculated previously. Refer to
Table 3.2.
Limited Capacity
Remote Blower,
Btu/h (kW)
370,000 (108)
850,000 (249)
1,800,000 (527)
3,600,000 (1054)
4,700,000 (1377)
CAUTION
Limited Capacity
Zinc Phospate,
Iron Phospate,
Btu/h (kW)
Btu/h (kW)
110,000 (32)
220,000 (64)
250,000 (73)
500,000 (146)
440,000 (129)
880,000 (258)
1,000,000 (293)
2,000,000 (586)
1,800,000 (527)
3,600,000 (1055)
7