Flow Process Heaters

Low Flow and High Delta T heaters are often linked together.  Processes often have one or both of these parameters which has led to a new Patent Pending design for HC Thermal.  Why are low flow/high delta heaters so special?  With low flow internal vessel velocities at or near laminar cause very poor heat transfer and elevated element temperatures.  Combined with a high process Delta T, it puts normal heater elements operating at their limits and often pushes vessel temps into high temp and or exotic alloys.  Either of which is detrimental from either budgetary or area location constrictions.   Often traditional heater design would have to be stacked in varied watt density design and vessel diameters to be able to achieve the desired process design.