Calculate the heat loss per linear foot from a 3-in. steel pipe (id = 3.07 in.,od = 3.5 in., k = 25 btu/hr-ft-ºf) covered with 0.5-in thick insulation (k = 0.11 btu/hr-ft-ºf). the pipe transports a fluid at 300 ºf with an inner unit-surface heat transfer coefficient of 40 btu/hr-ft2-ºf and is exposed to ambient air at 80 ºf with an average outer heat transfer coefficient of 4.0 btu/hr-ft2-ºf.

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