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 as 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 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.
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 just driving the flow when 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.
Tips: The graphs of temperature vs. SCFM/kW above are for air at the very lowest loss conditions. The position along with 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 becomes 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.