14-121 A laboratory has a volume of 700 m' and must have one complete air change per minute when being used. Outside atmospheric air at 100 kPa, 30°C dry bulb, and 60 percent rela- tive humidity is ducted into the laboratory air-conditioning equipment and conditioned to 20°C dry bulb and 12°C wet bulb, the required state for air supplied to the laboratory. (a) Sketch the system hardware and the psychrometric diagram for the process. (b) What outside atmospheric air mass flow rate is required for the air change, in kg/h? (c) Determine the mass flow rate of water condensed from the atmospheric air, in kg/min. (d) The cooling fluid in the air-conditioning system is chilled water, which has a 15°C temperature rise during the heat exchange process. Determine the chilled water mass flow rate, in kg/min.
14-121 A laboratory has a volume of 700 m' and must have one complete air change per minute when being used. Outside atmospheric air at 100 kPa, 30°C dry bulb, and 60 percent rela- tive humidity is ducted into the laboratory air-conditioning equipment and conditioned to 20°C dry bulb and 12°C wet bulb, the required state for air supplied to the laboratory. (a) Sketch the system hardware and the psychrometric diagram for the process. (b) What outside atmospheric air mass flow rate is required for the air change, in kg/h? (c) Determine the mass flow rate of water condensed from the atmospheric air, in kg/min. (d) The cooling fluid in the air-conditioning system is chilled water, which has a 15°C temperature rise during the heat exchange process. Determine the chilled water mass flow rate, in kg/min.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:14-121 A laboratory has a volume of 700 m' and must have
one complete air change per minute when being used. Outside
atmospheric air at 100 kPa, 30°C dry bulb, and 60 percent rela-
tive humidity is ducted into the laboratory air-conditioning
equipment and conditioned to 20°C dry bulb and 12°C wet
bulb, the required state for air supplied to the laboratory.
(a) Sketch the system hardware and the psychrometric
diagram for the process.
(b) What outside atmospheric air mass flow rate is required
for the air change, in kg/h?
(c) Determine the mass flow rate of water condensed from the
atmospheric air, in kg/min.
(d) The cooling fluid in the air-conditioning system is chilled
water, which has a 15°C temperature rise during the heat
exchange process. Determine the chilled water mass flow
rate, in kg/min.
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