MHI Airtorch® Design Graphs
For flow calculations please contact MHI.
From 2 KW to 16 MW
Energy and Environment Improvement with an MHI Airtorch®.
The Airtorch® may alsobe be used in a recuperative mode.
MHI can provide an Airtorch® unit for up to greater than 800°C in input temperature, Output up to 1200°C making the MHI DH add-on an ideal component for all large ovens.
Why do hundreds of customers prefer MHI for their best energy-efficient air heating needs? Now offering new and improved with an incredible warranty on heating elements. Please Contact MHI.
When comparing Airtorch® against heat exchangers, please note that the MHI Airtorch® units often save considerable energy because of their low pressure drop. This power loss could be substantial with heat exchangers. For example, if a flow of 0.6 kg/s is driven with a 5 Bar (~90 psi) pressure, then almost ~200 kW of power could be wasted for driving the flow compared to the Airtorch® systems that offer an extremely low-pressure drop (~ 1 PSIG). Or 2000KW if the ultra-low pressure drop Airtorch® models are used for 0.1 psig.
Please contact MHI for details.
Please review the properties of gases and formulas to use for power calculations.
1kW Savings per year is $876 @10c per kWh
10kW Savings per year is $8760 @10c per kWh
100kW Savings per year is $87600 @10c per kWh
Large Flow MVTA. For 1000-1100°C. These are sealed process gas heaters (THN or DNA class) with a blower or inline capability. High KW – High Flow.
Large Flow GTA – For high-pressure vessel Airtorch use. Custom engineering. Please contact us directly for assistance.
Typical Conversion of Gas
LTA – Up to 900°C. LTA is a process heater for air that requires a compressed air input.
VTA – Up to 900°C. VTA is a process gas heater with a fan or blower with low flow sensor capability.
MTA925 and GTA – Up to 925°C/1100°C. These are flow or inline sealed process gas heaters which can take compressed air or compressed gas input. New Models for MVTA-DPF-DNA Class.
DPF – Up to 1150°C-1250°C/~2200°F. DPF models can take fan or blower input as well as a compressed air/gas input.
| N2 gas | Weight | Gas | ||
| pounds (lb) |
kilograms (kg) |
cubic feet (scf) |
cu meters (Nm3) |
|
| 1 pound | 1.0 | 0.4536 | 12.83 | 0.36 |
| 1 kilogram | 2.205 | 1.0 | 28.24 | 0.8 |
| 1 SCF gas | 0.07245 | 0.03286 | 1.0 | 0.02832 |
| 1 Nm3 gas | 2.757 | 1.2506 | 35.3 | 1.0 |
| Scf (Standard cubic foot) gas measured at 1 atmosphere and 70°F. Nm3 (Normal cubic meter) gas was measured at 1 atmosphere and 0°C. |
Quick conversion mm H2O column difference to psi:
1 mm H2O column difference to psi = 0.00142 psi
50 mm H2O column difference to psi = 0.07112 psi
100 mm H2O column difference to psi = 0.14223 psi
Quick Conversion of bar to kPA
| bar | kPa |
| 1 | 100 |
| 1.2 | 120 |
| 1.4 | 140 |
| 2.0 | 200 |
Airtorch® Mode. Heat from cold to hot quickly.
Airtorch® Recuperator Mode. SH models accept inlet up to 800°C.
Example-Air. Use the blue-black line for steady state and cold start.
Use the purple line only in recuperator mode.
Conversions:
Actual: 1 m³= 35.31467 ft³
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Standard value (approximate Conversion)
1 Nm³/h is ~ 0.6 SCFM
Or
1 SCFM ~1.6 Nm³/hr.
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Power
1 MBH = 0.293 kW
Psst: A very approximate way to theoretically calculate is SCFM = KW x 3193/∆T where ∆T is in °F. Use this method (and a little margin) for temperatures below 1200°F. For higher than 1200°F Contact MHI.
Ideation
New and improved with incredible warranty on heating elements
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The following table is for converting between different pressure units. 1 psi = 0.068947 bar = 68.947 mbar = 0.068046 atmosphere. |
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For 500Kw – 6 MW
New VSH Airtorch® Model
