. A liquid of mass 7 kg and specific heat 4 kJ/kg K is contained in a cylinder type heater of diameter 0.15 m and height
Posted: Sat May 21, 2022 4:09 pm
- A Liquid Of Mass 7 Kg And Specific Heat 4 Kj Kg K Is Contained In A Cylinder Type Heater Of Diameter 0 15 M And Height 1 (31.6 KiB) Viewed 17 times
. A liquid of mass 7 kg and specific heat 4 kJ/kg K is contained in a cylinder type heater of diameter 0.15 m and height 0.40 m. The cylinder surface is exposed to the atmosphere at 20°C. Both sides caps of the cylinder are completely insulated to prevent heat leakage from the ends. Following data are noted: Heater wall thickness and thermal conductivity = 2 mm and 10 W/mK, respectively. Heat transfer coefficient of liquid and air = 100 W/m²K, and 10 W/m²K, respectively. Calculate (1) Overall heat transfer coefficient (ii) time required the temperature of the fluid to reduce 50 °C after the heater is switched off.