Engineering, 28.05.2021 20:30 naynay4evr

A well-insulated 1 m × 1 m × 0.5 m icebox initially at 20°C is to be cooled by a placing a cooling 200 L refrigerant cylinder. The Refrigerant used is R-134a at 160
kPa such that half of the cylinder is filled by liquid R-134a while the other half
contains R-134a in vapor phase. A 260 W DC fan is used to distribute the air inside
the box. As a result of heat transfer from the box to the cooling cylinder, the pressure
of the refrigerant reaches 500 kPa after 45 min. Assume constant specific heats for
the air at the box and the air pressure remains constant at 100 kPa; Determine
1- The mass of the refrigerant inside the cylinder.
2- The rate of heat transfer from the room to the refrigerant.
3- The mass of air in the box.
4- The final temperature of the box.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

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

Answer

Engineering, 04.07.2019 18:10

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

Answers: 3

Answer

You know the right answer?

A well-insulated 1 m × 1 m × 0.5 m icebox initially at 20°C is to be cooled by a placing a cooling...

Questions