Engineering, 01.12.2021 01:00 mathewsjayden45

7â€“115 Air is to be cooled in the evaporator section of a refrig- erator by passing it over a bank of 0.8-cm-outer-diameter and 0.8-m-long tubes inside which the refrigerant is evaporating at âˆ’ 20Â° C. Air approaches the tube bank in the normal direction at 0Â° C and 1 atm with a mean velocity of 5 m/s. The tubes are arranged in-line with longitudinal and transverse pitches of S L = S T = 1.5 cm. There are 25 rows in the flow direction with 15 tubes in each row. Determine (a) the refrigeration capac- ity of this system and (b) pressure drop across the tube bank. Evaluate the air properties at an assumed mean temperature of âˆ’ 5Â° C and 1 atm. Is this a good assumption?

Answers: 2

Show answers

Another question on Engineering

Engineering, 03.07.2019 23:20

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Answers: 3

Answer

Engineering, 04.07.2019 18:10

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg

Answers: 2

Answer

You know the right answer?

7â€“115 Air is to be cooled in the evaporator section of a refrig- erator by passing it over a bank...

Questions