Turbine ExhaustTemperature (°F)Pressure (psia)Flow rate (lbm/hr)Density (lbm/ft³)Specific heat (Btu/lbm °F)0.259A cross flow plate fin compact heat exchanger is to be used for this heat recoveryapplication.80516.1196,000Compressor Discharge0.0316347132193,0000.43800.251 We wish to select a heat exchanger which will yield & = 0.75, using stainless steel fin materials.Calculate the UA required to obtain & = 0.75. Calculate UA by e-NTU methods and state whythe LMTD method is difficult to use. For the & -NTU methods, first use the graphical methodand then the equation.

We wish to select a heat exchanger which will yield & = 0.75, using stainless steel fin materials. Calculate the UA required to obtain & = 0.75. Calculate UA by e-NTU methods and state why the LMTD method is difficult to use. For the & -NTU methods, first use the graphical method and then the equation.

We wish to select a heat exchanger which will yield & = 0.75, using stainless steel fin materials. Calculate the UA required to obtain & = 0.75. Calculate UA by e-NTU methods and state why the LMTD method is difficult to use. For the & -NTU methods, first use the graphical method and then the equation.

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 10.3DP

See similar textbooks

Similar questions

Design Heat Exchanger Sell side Water Fluid condition Component Flow rate (kg/hr) Temperature in(°C) Temperature out (°C) Pressure (bar) 911.8585 25 40 1.01325 Tube side H2SO4 ? 50 25 1.01325
BTU 5. A heat exchanger has been designed based on calculated Uc (clean H.T coefficient) equal to 50; h. ft².°F h. ft².°F and a dirt/fouling factor of 0.005 I Do you think that the exchanger will have an "apparent overdesign" BTU (i.e., the initial area will be different from the final area once the HX is fouled) for some period after installation? What is the apparent % excess area at the start, assuming no change in q?
7) Outlet Temperature and Heat-Transfer Rate via Minimum Allowable Approach Temperature. Hot oil at a flow rate of 3.00 kg/s (Cp = 1.92 kJ/(kg-K)) enters an existing 1-1 counterflow exchanger at 400 K and is cooled by water entering at 325 K (under pressure) and flowing at a rate of 0.70 kg/s. The overall U = 350 W/(m².K) and A= 12.9 m². Calculate the heat-transfer rate and the exit oil temperature if the minimum allowable approach temperature is to be 10 °C (10 K).
Task 03 B) Double-pipe heat exchangersare used in many industries because of their low design and maintenance costs, flexibility, and low installation cost. They are mainly used for sensible heating or cooling of process fluids in applications of small heat transfer Water at the rate of 68 kg/min is heated from 35 0C to 75 0C by an oil having specific heat of 1.9 kg/kJ.0C . The fluids are used in a counter flow double-pipe heat exchanger, and the oil enters in the exchanger at 175 0C and leaves at 140 0C . The overall heat transfer coefficient is 320 W/m2. 0C . Apply heat transfer formulae to heat exchangers and calculate the heat exchanger area.
1. 400,000 Ibm/hr of 270°F water is to be heated to 370°F by condensing saturated 390°F steam. (The steam does not sub cool upon condensing). Your job is to design the heat exchanger. The following parameters represent constraint your design. number of tube passes 4 tube fluid water being heated number of shell pass shell fluid steam being cooled U (based on outside tube area) 700 BTU/hr – ft² – °F 1 in tube outside diameter tube wall thickness 1/16 in bulk tube fluid velocity 5 ft/s (a) How many tubes are required per pass? (b) How many tubes are required total? (c) Allowing 3 ft for headers and flanges, how long should the exchanger be?
Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine. The dimensions and values are given. One of the steps is not required to find the required length of the HX, if the oil leaves at 60 C? Oil and water inlet temperatures are 100 and 30 C, respectively. Log mean temperature difference Overall heat transfer coefficient Thermal entry length to validate the steps None of the above Reynolds number, Prandtl number and Nusselt number
Design of Heat Transfer Unit No.(20): i-C4 Condenser No. of Group: ( ) Fluid Condition Shell Side Tube Side Names of Group Component Ethylene refrigerant i-C4 1- Flow rate (Kg/hr) ? 4300 Temperature in ("C) 7 (Liquid) 67 (Vapor) 2- Temperature out ("C) 7 (Vapor) 67 (Liquid) Pressure (bar) 47.98 10.16
11.3 A type-302 stainless steel tube of inner and outer diameters D;= 22 mm and D, = 27 mm, respectively, is used in a cross-flow heat exchanger. The fouling factors, R', for the inner and outer surfaces are estimated to be o.0004 and o.0002 m² . K/W, respectively. Fouling R, factors Tube, SS302 R Water Tmi= 75°C umi= 0.5 m/s D; D. V,= 20 m/s T,= 15°C Air (a) Determine the overall heat transfer coefficient based on the outside area of the tube, U o. Compare the thermal resistances due to convection, tube wall conduction, and fouling. (b) Instead of air flowing over the tube, consider a situation for which the cross-flow fluid is water at 15°C with a velocity of V, =1m/s. Determine the overall heat transfer coefficient based on the outside area of the tube, Uo. Compare the thermal resistances due to convection, tube wall conduction, and fouling. (c) For the water-air conditions of part (a) and mean velocities, u m. i, of o.2, 0.5, and 1.0 m/s, plot the overall heat transfer coefficient…
Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine. The dimensions and values are given. One of the steps is not required to find the required length of the HX, if the oil leaves at 60 C? Oil and water inlet temperatures are 100 and 30 C, respectively. Log mean temperature difference Thermal entry length to validate the steps Overall heat transfer coefficient Reynolds number, Prandtl number and Nusselt number None of the given
10. Recall when you were collecting data for the Entrance Loss experiment, there was a ten second delay before the data was posted in Excel. Why was there a delay, and why was it important? 11. Were your theoretical entrance loss factors, KL, higher or lower than your experimental value? What may be some causes for each entrance type? Concentric Tube Heat Exchanger 12. Why was it difficult to achieve steady-state conditions? 13. List at least two assumptions that are being made in the Heat Exchanger experiment, and explain the reasons why they are approximations. 14. What are thermal and hydrodynamic entrance lengths? Are either (or both) of them an issue for the experiment? Why or why not?
The specific heat value in phase change heat exchangers is approximately infinity 0 kJ/(kgC) negative constant 1 kJ/(kgC) not sufficient information
11.120 The lubricating oil cooler for a large gas turbine consists of a one-shell-pass, one-tube-pass heat exchanger. The oil (c, = 0.5 Btu/lb,m F) enters at 320 F flowing through the tubes at 7000 lb,/hr. The water coolant enters at 80 F and flows through the shell at 9000 lb/hr. Find (a) the maximum possible heat-transfer rate (i.e., the rate for a very large heat exchanger) and (b) the outlet temperatures of the two fluids for both parallel- flow and counterflow arrangements. m