Engineering, 28.11.2019 02:31 mel4245

Engine oil (cp = 2048 j/kg. k) flows through a thin-walled copper tube at a rate of 0.3 kg/s. the engine oil enters at 80℃ and is cooled by water (cp = 4180 j/kg. k) entering the heat exchanger at 20℃. it is desired to limit the exit temperature of the engine oil to a maximum of 40℃. the convective heat transfer coefficients of the oil and water sides of the heat exchanger are 750 w/m2 . k and 350 w/m2 . k, respectively. if the water exits the heat exchanger at a temperature of 32℃, for a parallel flow heat exchanger, determine
(a) the mass flow rate of the water,
(b) the log mean temperature difference and
(c) the total area of the heat exchanger. (40 points)

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, Strick1530

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Answers: 2

continue

Engineering, 04.07.2019 18:10, chadatkin

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

Answers: 3

continue

Engineering, 04.07.2019 18:10, mamasbug4285

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Answers: 3

continue

Engineering, 04.07.2019 18:20, hayleymckee

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Answers: 2

continue

You know the right answer?

Engine oil (cp = 2048 j/kg. k) flows through a thin-walled copper tube at a rate of 0.3 kg/s. the en...