(2) A well-insulated 170 m' room initially at 11°C and 104 kPa is heated by the radiator of a steam heating system. The radiator has a volume of 75 L and is filled with superheated vapor at 1600 kPa and 350°C. At this moment both the inlet and the exit valves to the radiator are closed. A 260-W fan is used to distribute the air in the room. The pressure of the steam is observed to drop to 100 kPa after 132 min as a result of heat transfer to the room. ASsuming constant specific heats for air at room temperature and that the room is perfectly sealed, the temperature rise will be:

Elements Of Electromagnetics
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(2) A well-insulated 170 m' room initially at 11°C and 104 kPa is heated by the
radiator of a steam heating system. The radiator has a volume of 75 L and is
filled with superheated vapor at 1600 kPa and 350°C. At this moment both the
inlet and the exit valves to the radiator are closed. A 260-W fan is used to
distribute the air in the room. The pressure of the steam is observed to drop to
100 kPa after 132 min as a result of heat transfer to the room. Assuming
constant specific heats for air at room temperature and that the room is
perfectly sealed, the temperature rise will be:
Fan
Steam
radiator
(a) 18.1 K
(b) 19.4 K
(c) 20.3 K
(d) 21.2 K
(e) 22.5 K
Transcribed Image Text:Start convers- (2) A well-insulated 170 m' room initially at 11°C and 104 kPa is heated by the radiator of a steam heating system. The radiator has a volume of 75 L and is filled with superheated vapor at 1600 kPa and 350°C. At this moment both the inlet and the exit valves to the radiator are closed. A 260-W fan is used to distribute the air in the room. The pressure of the steam is observed to drop to 100 kPa after 132 min as a result of heat transfer to the room. Assuming constant specific heats for air at room temperature and that the room is perfectly sealed, the temperature rise will be: Fan Steam radiator (a) 18.1 K (b) 19.4 K (c) 20.3 K (d) 21.2 K (e) 22.5 K
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