Problem 3 An air-cooled condenser is to reject 70 kW of refrigerant to air. The condenser has an air-side area of 210 m² and a U value based on this area of 0.037 kW/m²-K; it is supplied with 6.6 m³/s of air which has a density of 1.15 kg/m³. If the condensing temperature is to be limited to 55°C, what is the maximum allowable temperature of the inlet air? heat from condensing a th = constant O(= th – te) 1 2

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems
Section: Chapter Questions
Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....
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Problem 3
%D
An air-cooled condenser is to reject 70
kW of heat
refrigerant to air. The condenser has an
air-side area of 210 m? and a U value
from
a
condensing
th
= constant (= th – t.)
based on this area of 0.037 kW/m²-K; it
is supplied with 6.6 m³/s of air which has
a density of 1.15 kg/m3. If the
condensing temperature is to be limited
to 55°C, what is the maximum allowable
temperature of the inlet air?
1
Transcribed Image Text:Problem 3 %D An air-cooled condenser is to reject 70 kW of heat refrigerant to air. The condenser has an air-side area of 210 m? and a U value from a condensing th = constant (= th – t.) based on this area of 0.037 kW/m²-K; it is supplied with 6.6 m³/s of air which has a density of 1.15 kg/m3. If the condensing temperature is to be limited to 55°C, what is the maximum allowable temperature of the inlet air? 1
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