= 1.0 Btu/lbm-°F) of a diesel engine from 190°F to 140°F, using air (c = 0.245 Btu/lbm F) with an inlet11-80E A single-pass crossflow heat exchanger is used to cool jacket water (cptemperature of 90°F. Both airflow and water flow are unmixed. If the water and air mass flow rates are 92,000 lbm/h and 400,000 lbm/h, respectively, determine the log mean temperaturedifference for this heat exchanger.FIGURE P11-80EAir flow(иктіхеd)Water flow(апmixed)

Answered: = 1.0 Btu/lbm-°F) of a diesel engine…

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 10.48P

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A single-pass cross-flow heat exchanger is used to cool jacket water (cp = 1.0 Btu/lbm·°F) of a diesel engine from 190°F to 140°F, using air (cp = 0.245 Btu/lbm·°F) with inlet temperature of 90°F. Both air flow and water flow are unmixed. If the water and air mass flow rates are 92,000 lbm/h and 400,000 lbm/h, respectively, determine the log mean temperature difference for this heat exchanger.
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