Aspherical tank 2m diameter contains liquefied fuel gas. it is covered in insulation 120mm thick with a thermal conductivity of 0.025w/mk. the surface heat transfer coefficient between the lagging and the surrounding air is 30w/m2k. the air is at 25°c and the liquid is -125°c. assume the inner surface temperature is the same as the liquid. calculate the heat transfer rate required to keep the liquid at a constant temperature and surface temperature of the insulation.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.

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