In a closed loop industrial heating process, the main four elements are:
These four main elements need to be connected with each other. The thermocouple and the heaters have standard lead wires of 12 inches (although they can easily be made longer), but the control panel may still be a couple of feet away from them. To connect them, you may need thermocouple wire or thermocouple extension wire and wires for the electrical power. If the wires are potentially exposed to temperature above 450 degree Fahrenheit, high temperature wire will be needed.
Thermal calculations include the calculation of heat loss during startup and processing. This heat losses can be significant and a major cost factor which can be reduced through insulation. For example: each square foot of uninsulated oxidized steel at 400deg F will radiate 350W (or 1200 BTU) into the atmosphere. Insulation is rated by the insulative or “R” value. The “R” value is simply the reciprocal value of the conductivity “k” (k = btu/in/hr/sqft/degF) The higher the “R” value, the better the insulation quality. To reduce heat loss, different types of industrial thermal insulation are available.
Please see the other sections of the Delta T website for more information or contact us with any additional questions.