A healing contractor must heat
Your assignment is to develop a series of design graphs that can be used to demonstrate acceptable combinations of tube dimensions (D and L) and of hot gas conditions (
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
Fundamentals of Heat and Mass Transfer
Additional Engineering Textbook Solutions
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
Mechanics of Materials
Applied Statics and Strength of Materials (6th Edition)
Fox and McDonald's Introduction to Fluid Mechanics
Fundamentals Of Thermodynamics
Engineering Mechanics: Statics
- The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.3 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 30 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter pipe length. a. Find the convection coefficient in the pipe = Answer W / m² ° C. b. Calculate heat loss per meter pipe length = Answer watt.arrow_forwardThe liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.4 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 20 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter of pipe length. a.Find the convection coefficient in the pipe = AnswerW / m² ° C. b. Calculate heat loss per meter pipe length = Answerwatt.arrow_forward1. Heated air at 1 atm and 35°C is to be transported in a 150-m-long circular plastic duct at a rate of 0.35 m³/s (Fig. 1). If the head loss in the pipe is not to exceed 20 m, using the Colebrook equation and consulting with the FE Reference Handbook and appropriate table(s) for equations and properties. Write a Matlab code to determine the i. ii. iii. iv. minimum diameter of the duct, the friction factor, average flow velocity and Reynolds number of the flow 0.35 m³/s air D -150 m Fig 1arrow_forward
- Consider a cylindrical cross‐section pipe that is 50 m long with a 7 cm diameter, and which has a starting pressure of 320 kPa and an outlet pressure of 105 kPa. A pressure sensor is located 10 m from the start of the pipe. (a) Calculate the pressure that this sensor would read if the fluid were water (ρ = 1000 kg/m3 ). (b) If the pipe instead contains gaseous carbon dioxide in isothermal flow, would the pressure be the same at this sensor as if the fluid were water?arrow_forwardUsing the velocity distribution for a laminar, incompressible flow of a Newtonian fluid in a long vertical tube, for a fluid whose density is 300 kg per cubic meter and viscosity is 1x10 - 4 Pascal-second travelling along a long circular tube of cross sectional area of 1 cm2 owing to a pressure gradient of 1,000 Pascal per meter, the average velocity in meter per second (m/s) is Blank 1.arrow_forwardANSWER ASAP Using the velocity distribution for a laminar, incompressible flow of a Newtonian fluid in a long vertical tube, for a fluid whose density is 300 kg per cubic meter and viscosity is 1x10 - 4 Pascal-second travelling along a long circular tube of cross sectional area of 1 cm2 owing to a pressure gradient of 1,000 Pascal per meter, the average velocity in meter per second (m/s) is Blank 1.arrow_forward
- High-pressure steam condenses at 400 K on the outer surface of a thin-walled tube of 50 mm diameter. The overall heat transfer coefficient between steam and air on the inside of the tube is 200 W/m?. If the air enters the tube at 25 m/s, 150 kPa and 280 K, find the length of the tube required for the air to be heated to 350 K. [Ans. L = 13.9 m]arrow_forwardCalculate the critical and actual heat flux for pool boiling of water at 2.1 bar from a surface at 130 °C. Take: Saturation temperature =123 °C PL= 941.6 kg/m', pv=1.18 Ca= 4.25 KJ/kg.°C K=687*10 W/m°C HL=230*10“ Ns/m2 2=2198 KJ/Kg 0=55*10 N/m Pw at 125°C = 2.5*10$ N/m² P,=2.25*10 N/m²arrow_forwardExample(1-13): steam and water flow through 75 mm inside diameter pipe at flow rate of 0.05 and 1.5 m³/s respectivily. If the mean temperature and pressure are 330 K and 120 kpa, what is the pressure drop per unit length of pipe. Where the pipe roughness 0.00015 mm, liquid and gas viscosities are 0.52x10³ pa.s and 0.0133x10-³ pa.s.arrow_forward
- Conduction 1. A thermodynamic analysis of a proposed Brayton cycle gas turbine yields P= 5 MW of net power production. The compressor, at an average temperature of T. = 400°C, is driven by the turbine at an average temperature of T₁ = 1000°C by way of an L = 1m-long, d= 70mm - diameter shaft of thermal conductivity k = 40 W/m K. Compressor min T Combustion chamber Shaft L Turbine Th out (a) Compare the steady-state conduction rate through the shaft connecting the hot turbine to the warm compressor to the net power predicted by the thermodynamics- based analysis. (b) A research team proposes to scale down the gas turbine of part (a), keeping all dimensions in the same proportions. The team assumes that the same hot and cold temperatures exist as in part (a) and that the net power output of the gas turbine is proportional to the overall volume of the device. Plot the ratio of the conduction through the shaft to the net power output of the turbine over the range 0.005 m s Ls 1 m. Is a…arrow_forward3. For the one-dimensional, radial, steady heat flow through the cylindrical annulus shown below, what is the temperature, T₁, at the inner surface? TI Hot water flow Twater = 140 °F hin 60 Btu/hr-ft²-°F Cool air environment Tair= 70°F hout=4.2 Btu/hr-ft².°F Steel Pipe. Inner diameter = 1 inch Outer diameter = 1.5 inches thermal conductivity = 31 Btu/hr-ft-°F ************ *****************arrow_forwardGas oil at 210 °C is to be cooled to 30 °C and its flow-rate is 20,000 kg/h. The temperature available of cooling water is 25 °C to 55 °C. The pressure drop allowance for each stream is 100 kN/m2. Design Tube-side and Shell-side coefficient Physical properties Water Gas oil T, °C 40 120 Cp, kJ kg1 °C-1 k, kWm-l °C-1 4.18 2.28 631 x 10-6 0.125 µ, mNm2 s 671 x 10-3 0.17 P, kg m3 850 992.8arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning