1. 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 S₁ =ST=1.5 cm. There are 30 rows in the flow direction with 15 tubes in each row. a. Determine the refrigeration capacity of the system. b. Determine the pressure drop across the tube bank. 0°C 1 atm 4 m/s 0.4 m Air ST=1.5 cm 0.8 cm S₁ = 1.5 cm Refrigerant, -20°C
1. 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 S₁ =ST=1.5 cm. There are 30 rows in the flow direction with 15 tubes in each row. a. Determine the refrigeration capacity of the system. b. Determine the pressure drop across the tube bank. 0°C 1 atm 4 m/s 0.4 m Air ST=1.5 cm 0.8 cm S₁ = 1.5 cm Refrigerant, -20°C
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Transcribed Image Text:1. 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
S₁ =ST=1.5 cm. There are 30 rows in the flow direction with 15 tubes in each row.
a. Determine the refrigeration capacity of the system.
b. Determine the pressure drop across the tube bank.
0°C
1 atm
4 m/s
0.4 m
Air
ST=1.5 cm
0.8 cm
S₁ = 1.5 cm
Refrigerant, -20°C
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