A pipe with a 1.5 cm in diameter and 10 min length is gaining 800 W/m² constant heat from its outer surface. Water enters the pipe at 25 °C with velocity of 0.1 m/s. What is the wall temperature at the exit plane of the pipe? Assume that all gaining heat is transferring the water. For water: k = 0.6 W/mK, v = 0.75x10-6 m²/s, p = 1000 kg/m³, cp = 4187 J/kgK, Pr = 6.

A pipe with a 1.5 cm in diameter and 10 min length is gaining 800 W/m² constant heat from its outer surface. Water enters the pipe at 25 °C with velocity of 0.1 m/s. What is the wall temperature at the exit plane of the pipe? Assume that all gaining heat is transferring the water. For water: k = 0.6 W/mK, v = 0.75x10-6 m²/s, p = 1000 kg/m³, cp = 4187 J/kgK, Pr = 6.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.38P

See similar textbooks

Similar questions

Hot water at 90°C flows on the inside of a 2.5-cm-ID steel tube with 0.8mm wall thickness at a velocity of 4 m/s. Engine oil at 20°C is forced across the tube at a velocity of 7 m/s. If the convection heat transfer coefficient at the inner and outer surface areas of the tube are 20,000 and 1167 W/m2-°C, respectively. Calculate the overall heat transfer coefficient based on the outer surface area of the tube. k (steel) = 36 W/m-°C
A pipe with a 1.5 cm in diameter and 10 min length is gaining 800 W/m2 constant heat from its outer surface. Water enters the pipe at 25 °C with velocity of 0.1 m/s. What is the wall temperature at the exit plane of the pipe? Assume that all gaining heat is transferring the water. For water: k = 0.6 W/mK, ν = 0.75x10-6 m2/s, ρ = 1000 kg/m3, cp = 4187 J/kgK, Pr = 6. Please choose one: A. 30.10 °C B. 40.50 °C C. 34.68 °C D. 35.56 °C
Water (5.2 L/min) is flowing in a tube "D= 3 cm, L= 5 m" and is to be heated from 15°C to 59.9°C by applying a uniform heat flux on the outer surface of the tube by electric resistance heater. What is the power rating of the resistance heater (kW)? 0.8 II If turbulent flow use Dituss-Boetler relation Nu= 0.023 Re Pr. 3 Properties : p = 992.1 kg/m , C 4179 J/kg. °C, k=0.631 W/m°C, Pr= 4.32, v= 0.658E-6 m /s Select one:
A pipe with a 1.5 cm in diameter and 10 min length is gaining 800 W/m2 constant heat from its outer surface. Water enters the pipe at 25 °C with velocity of 0.1 m/s. What is the wall temperature at the exit plane of the pipe? Assume that all gaining heat is transferring the water. For water: k = 0.6 W/mK, ν = 0.75x10-6 m2/s, ρ = 1000 kg/m3, cp = 4187 J/kgK, Pr = 6.
Water (5.0 L/min) is flowing in a tube "D = 3 cm, L= 5 m" and is to be heated from 15°C to 64.0°C by applying a uniform heat flux on the outer surface of the tube by electric resistance heater. What is the power rating of the resistance heater (kW)? 00 0.8 If turbulent flow use Dituss-Boetler relation Nu= 0.023 Re Pr. 3 Properties : p = 992.1 kg/m ,C = 4179 J/kg. °C, k = 0.631 W/m°C, Pr= 4.32, v = 0.658E-6 1m/s
Water is flowving in a tube “D = 3 cm, L=5 m" and is to be heated from 15°C to 47°C by applying a uniform heat flux on the outer surface of the tube by electric resistance heater. If the Power rating is 11kW and the convective heat transfer coefficient is 864 W/m².K, what is the surface temperature at the exit “°C"? 3 Properties : p = 992.1 kg/m , C = 4179 J/kg.°C, k= 0.631 W/m°C, Pr = 4.32, v = 0.658E-6 m /s
Engine oil is heated by flowing through a circular tube of Diameter D= 50 mm, length L= 25, and whose surface is maintained at 150 Deg. C. If the flow rate and inlet temperature of the oil are 0.5 Kg/s and 20 Deg.C Use the following properties: p= 852 kg/m³, o-u/p-37.5 x10-6 m²/s, k=138x10-3 W/m.K, Pr = 490, C₂= 2131 J/kg.K. u= px 0= 0.032 kg/m.s m = 0.5 kg/s Engine Oil Tml = 20 C DIA = 0.05 m 9 Ts = 150 C L = 25 m Tmo? Based on the above information. 1. Find Rep 2. Based on the value of Rep, what type of flow do we have? 3. Determine the outlet mean temperature Tm.o, with the average heat transfer coefficient = 33.12 W/m^2.K
Hot exhaust gases leaving a stationary diesel engine at450°C enter a l5-cm-diameter pipe at an average velocity of3.6 m/s. The surface temperature of the pipe is 180°C. Deter-mine the pipe length if the exhaust gases are to leave the pipeat 250°C after transferring heat to water in a heat recovery unit.Use properties of air for exhaust gases.
Water flows in a 3.5-cm-diameter pipe so that the Reynolds number based on diameter is 2000 (laminar flow is assumed). The average bulk temperature is 10◦C. What would the heat transfer coefficient be in W/m2-°C for such a system if the tube wall was subjected to a constant heat flux and the velocity and temperature profiles were completely developed? Evaluate properties at bulk temperature.
0.06kg/s of hot air flows through an insulated sheet metal duct of 180 mm Diameter. The air enters the duct at a temperature of 110⁰ and after a distance of 4.5 m gets cooled to a temperature of 70⁰c if the heat transfer officiant between the outer surface of the duct and cold ambient air at 5⁰C is 6.5 w/m²-C calculate the following: a. The heat loss from the duct over its 4.5m at a length of 4.5m b. The heat flux and the duct surface temperature at a length of 4.5m
A constant heat flux of 40 W/cm² is applied from the outside to the three surfaces (top surface adiabatic) of a 6cmx6cm square pipe. Water enters the pipe at 25°C and its flow rate is 1 kg/s. If the length of the channel is 1.5 m, what will the outlet temperature of the water be? You can get the properties of water at 320K.
Water (7.7 L/min) is flowing in a tube "D = 3 cm, L= 5 m" and is to be heated from 15°C to 62.1°C by applying a uniform heat flux on the outer surface of the tube by electric resistance heater. What is the power rating of the resistance heater (kW)? If turbulent flow use Dituss- Boetler relation Nu= 0.023 Re0.8 Pr". Properties : p = 992.1 kg/m³ , C, = 4179 J/kg.°C, k = 0.631 W/m°C, Pr = 4.32, v = 0.658E-6 m²/s