a boiler delivers 5400kg of steam per hour at a pressure of 750KN/m^2 and with a dryness fraction of 0.98.The feedwater of the boiler is at a temoerature of 41.5 °c . The coal used for firing the boiler haas a calorific value of 31000KJ/kg and is used at the rate of 670Kg/hr. Determine the thermal efficiency of the boiler and the equivalent evaporation F and A 100 °c .​

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