Engineering, 05.02.2020 21:40 hervinlouis014

A5-m × 6-m × 8-m room is to be heated by an electrical resistance heater placed in a short duct in the room.

initially, the room is at 15°c, and the local atmospheric pressure is 98 kpa.

the room is losing heat steadily to the outside at a rate of 200 kj/min.

a 300-w fan circulates the air steadily through the duct and the electric heater at an average mass flow rate of 50 kg/min.

the duct can be assumed to be adiabatic, and there is no air leaking in or out of the room.

if it takes 13 min for the room air to reach an average temperature of 25°c, find

(a) the power rating of the electric heater

(b) the temperature rise that the air experiences each time it passes through the heater.

Answers: 1

Show answers

Another question on Engineering

Engineering, 03.07.2019 15:10

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

Answers: 2

Answer

You know the right answer?

A5-m × 6-m × 8-m room is to be heated by an electrical resistance heater placed in a short duct in t...

Questions

SAT, 17.05.2021 04:50

I miss you pushing me close to the edge I miss you I wish I knew what I had when I left I miss you You set fire to my world, couldn...