Engineering, 24.05.2020 00:03 masonprice

A double-pipe heat exchanger is used to cool a hot fluid (cp = 3800 J/kgK) entering the heat exchanger at 200°C with a flow rate of 0.4 kg/s. In the cold side, cooling fluid (cp = 4200 J/kgK) enters the heat exchanger at 10°C with a mass flow rate of 0.5 kg/s.
The double-pipe heat exchanger has a thin-walled inner tube, with convection heat transfer coefficients inside and outside of the inner tube estimated to be 1400 W/m^2K and 1100 W/m^2K, respectively. The heat exchanger has a heat transfer surface area of 2.5 m^2 , and the estimated fouling factor caused by the accumulation of deposit on the surfaces is 0.0002 m^2*K/W.
(a) Determine the effectiveness values for the parallel- and counter-flow configurations.
(b) Determine outlet temperatures of the hot fluid for the parallel- and counter-flow configurations.
(c) Determine outlet temperatures of the cold fluid for the parallel- and counter-flow configurations.

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 08:10, doggo242

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Answers: 1

continue

Engineering, 04.07.2019 18:10, ahmedeldyame

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Answers: 1

continue

Engineering, 04.07.2019 18:10, abdirahmansoloman

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Answers: 1

continue

Engineering, 04.07.2019 18:10, meganwintergirl

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Answers: 3

continue

You know the right answer?

A double-pipe heat exchanger is used to cool a hot fluid (cp = 3800 J/kg*K) entering the heat exchan...