Consider a home heating system consisting of a natural gas-fired furnace and a thermostat. in this case the process consists of the interior space being heated. the thermostat contains both the measuring element and the controller. the furnace is either off or on. draw a p& id schematic diagram for this control system. on your diagram, identify controlled variables, manipulated variables, and disturbance variables. be sure to include several possible sources of disturbances.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k