The standard conditions flow rate (SCFM) vs. Temperature is shown below (per kW). When the exit temperature required is greater than 925°C please choose the THN/DNA/SH or DPF models (the graphs may be used for all MHI Airtorch® models except for the very low KW such a LTA750-01 or 2 KW models). In the graphs below please use the light blue ot black thin lines for continuous mode with typically encountered start-stop conditions. The thick blue line is experienced in instances where the units have been in service and retain heat before the next run. This also happens when the Airtorch® is in a recuperative mode. For the graphs below, the inlet temperature is assumed as ~50C. The Airtorch® is an energy efficient device. MHI can provide 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.
When comparing and 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 psig) pressure, then almost ~200 kW of power could be wasted for just driving the flow when compared to the Airtorch® systems that offer an extremely low pressure drop (~ 1 psig). Please contact MHI for details.
Tips: The graphs of temperature vs. SCFM/kW above are for air at the very lowest loss conditions. The position along the SCFM/kW axis changes with the gas. For nitrogen it is almost the same. Because of the range of inlet temperatures and power a range of steady state temperatures become feasible with every Airtorch as long as used within the device limitations. Please consult MHI on the correct system for your application. MHI Airtorch® models also offer a low pressure drop. MHI Airtorch models are designed with high efficiencies in mind. Please consult with MHI on the best solution for your industrial process gas or inline heating. If the flow of 1~1.2 kg/s is driven with 10 Bar pressure as opposed to low pressure (Airtorch® type) then almost ~1 MW of power may be wasted for just driving the flow! So please compare this power loss for pressure flow when comparing manufacturers.
The following table is provided as a tool to change back and forth between different pressure units. All values in each line and for their corresponding units are identical. For instance, in the first line of the table:
1 psi = 0.068947 bar = 68.947 mbar = 0.068046 atm …