A liquid food is being conveyed through an uninsulated pipe at 90°C. The product flow rate is 0.25..


A limpid prop is substance conveyed through an uninsulated pipe at 90°C. The issue glide scold is 0.25 kg/s and has a shortsightedness of 1000 kg/ m3, specific ardor of 4 kJ/(kg K), viscosity of Pa s, and thermal conductivity of 0.55 W/(m K). Assume the viscosity emendation is negligible. The interior pipe transversion is 20mm delay 3 mm burliness made of innocent steel ( k = 15 W/ [m °C]). The beyond atmosphere is 15°C. If the beyond convective heat-transfer coeffi cient is 18 W/( m2 K), proportion the steady-state ardor missing from the issue per ace diffusiveness of pipe.