- Water flows at Too₁ = 50 °C, hoo₁ = 3500 W/m² ° C in a pipe with = 1.25 cm, r2=1.33 cm and L= 1 m, the pipe has k= 16 W/m C. The outside of the pipe is exposed to a fluid with Too2=20° C, hoo₂ = 7.6 W/m²° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. Park L 8(51)

- Water flows at Too₁ = 50 °C, hoo₁ = 3500 W/m² ° C in a pipe with = 1.25 cm, r2=1.33 cm and L= 1 m, the pipe has k= 16 W/m C. The outside of the pipe is exposed to a fluid with Too2=20° C, hoo₂ = 7.6 W/m²° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. Park L 8(51)

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.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.33P

See similar textbooks

Similar questions

B-Water flows at Too 50 °C, hoo1 = 3500 W/m² ° C in a pipe with r₁= 1.25 cm, r₂ =1.33 cm and L= 1 m, the pipe has k= 16 W/m °C. The outside of the pipe is exposed to a fluid with Too2 = 20° C, hoo₂ 7.6 W/m² ° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. 0 3 + 6 f = =
A power plant condenser (heat exchanger) trans- fers 100 MW from steam running in a pipe to sea- water being pumped through the heat exchanger. The wall separating the flows is 4 mm of steel, with k = 15 W/m K, and it has 7°C difference between the two fluids. Find the required area of the heat exchanger.
Water at an average temperature of 23 deg C flows through a 10-cm diameter pipe that is 2.5 m long. The pipe wall is heated by steam and is held at 100 deg C. The convective heat transfer coefficient is 2.25 x 10^4 W/m^2K. Find the heat flow in W.
n electric generator at a power plant produces energy by passing superheated steam from a high temperature container (reservoir), through a pipe connected to a series of fans, and then into a low temperature reservoir. As the steam passes across the blades of the fans some of the heat energy of the steam is transformed into mechanical energy, which turns the fans which in turn are connected to a generator, which in turn converts the mechanical energy into electrical energy. If the high temperature steam has a temperature of 412.1 K and the low temperature reservoir has a temperature of 105.4 K, what is the Carnot efficiency of this process?
Q1 (a) The temperature at the inner and outer surfaces of a boiler wall made of 25 mm thick steel and covered with an insulating material of 15 mm thickness are 350 °C and 600 °C respectively. If the thermal conductivities of steel and insulating material are 68 W/m°C and 0.126 W/mC respectively, determine the rate of flow through the boiler wall. (AT)overall Q = ΣRth
Q2 a) Consider heat transfer to oil flow inside a copper pipe. Is the pipe length affecting the heat transfer rate into the oil? Briefly explain. b) Used engine oil can be recycled by a patented reprocessing system. Suppose that such a system includes a process during which engine oil flows through a 1-cm-internal diameter, 0.02-cm- wall copper tube at the rate of 0.05 kg/s. The oil enters at 35°C and is to be heated to 45°C by atmospheric-pressure steam condensing on the outside, as shown in figure given below. i) ii) iii) Determine the condensing steam temperature at 1 atm, T. [°C]. Calculate the convection heat transfer coefficient for the oil inside the pipe, [W/m'.K]. Calculate the rate of heat transfer rate into the oil, [kW], and, determine the length of the tube required. iv) Condensing steam Ct lam Oil in 35°C Oil out 0.05 kg/s I em 45°C 0.02 cm Copper tube L = ?
Answer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1. Schematic of temperature distribution 2.ΔTLMTD 3.Actual heat transfer rate 4.Cmin 5.Maximum heat transfer rate
Problem 3: Insulation To=1 Toowwww Steam Tx2 T₂ T3 www www R₁ R₁ R₂ www.T R₂ Steam at Tx1 = 320 °C flows in a cast iron pipe (k = 80 W/m. °C) whose inner and outer diameters are 5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection and radiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficient inside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation. The determination is based on a unit length of the pipe (L = 1 m). Assumptions 1. Heat transfer is one-dimensional since there is no indication of any change with time. 2. Heat transfer is one-dimensional since there is thermal symmetry about the centreline and no variation in the axial direction. 3. Thermal conductivities are constant. 4. The thermal contact resistant at the interface is…
Steam at 350 °C flows through the stainless steel pipe with k=26 W/m.°C. The inner and outer diameters of the stainless steel pipe are 6.0 cm and 7.0 cm, respectively. The pipe is insulated from the outside with a 4.0 cm thick glass wool (k= 0.038 W/m.°C) and then a 3.0 cm thick k=0.25 W/m.K material. The insulated pipe is in the environment at 20 °C. The heat loss from the pipe occurs only by [natural convection+radiation]. Film heat transfer coefficient including the effects of [natural convection+radiation] in the insulated pipe is 30 W/m². is C. Calculate the heat transferred per unit pipe length since the film heat transfer coefficient defined according to the inner area of the pipe is 110 W/m².°C.
I need solution please please please
A 61 m rm of 203.2 mm pipe carrying 7.03 kg/cm^2 ga steam is drained by one steam trap. Find the capacity, kg per hr for running operation. The pipe is covered with insulation of 0.962 efficiency and is laid in a trench where the ambient ai temperature is probably 54.4 °C.
Air at (2.9000x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.00x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe.