1. Perpindahan Panas Minggu 09
Priyambodo Nur Ardi Nugroho, ST, MT
Mochamad Yusuf Santoso, ST, MT

2. Aliran Turbulen dalam Tabung
Water is to be heated from 15C to 65C as it flows through a 3cm internal diameter 5m long tube. The tube is equipped with an electric resistance heater that provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 10L/min. determine the power rating of the resistance heater. Also estimate the inner surface temperature of the pipe at the exit. ρ = kg/m3 k = W/mC v = x 10-6 m2/s Cp = 4179 J/kgC Pr = 4.32

3. Aliran Turbulen dalam Tabung

4. Tugas
Water at 15 0C (ρ = kg/m3 and μ = x 10-3 kg/ms) is flowing in a 4 cm diameter and 30m long horizontal pipe made of stainless steel steadily at a rate of 5 L/s Determine the pressure drop and the pumping power requirement to overcome this pressure drop
01. Water at 10°C ( = kg/m3 and  = x kg/m s, Cp = 1875 J/kg °C) is flowing in a 0.20-cm-diameter 15-m-long pipe steadily at an average velocity of 1.2 m/s. Determine (a) the pressure drop and (b) the pumping power requirement to overcome this pressure drop. (c) Rate of heat loss if the environment was at -5 °C and h = 18 W/m2 oC (nilai 50%) 02. Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 8 L/min, determine the power rating of the resistance heater. Also, estimate the inner surface temperature of the pipe at the exit. (nilai 50%) ρ = kg/m3 k = W/mC v = x 10-6 m2/s Cp = 4179 J/kgC Pr = 4.32