Required information Problem 05.088 - Mixing process An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg- K. The enthalpies of air are obtained from air 307.23 kJ/kg, and hroom 297. 18 kJ/kg. Use data from the steam table. table h₁ = 280. 13 kJ/kg, h₂ = 3 Cold air 7°C Warm air 34°C Room 24°C Problem 05.088.b Mixing process Determine the rate of heat gain of the room. The rate of heat gain of the room is kW. (Round the final answer to three decimal places.) Required information Problem 05.088 Mixing process An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg. K. The enthalpies of air are obtained from air 297. 18 kJ/kg. Use data from the steam table. table h₁ 280. 13 kJ/kg, h₂ = 307.23 kJ/kg, and hroom Cold air 7°C Warm air 34°C 어 Room 24°C Problem 05.088.a - Mixing process Using variable specific heats, determine the mixture temperature at the inlet of the room. The mixture temperature at the inlet of the room is °C.
Required information Problem 05.088 - Mixing process An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg- K. The enthalpies of air are obtained from air 307.23 kJ/kg, and hroom 297. 18 kJ/kg. Use data from the steam table. table h₁ = 280. 13 kJ/kg, h₂ = 3 Cold air 7°C Warm air 34°C Room 24°C Problem 05.088.b Mixing process Determine the rate of heat gain of the room. The rate of heat gain of the room is kW. (Round the final answer to three decimal places.) Required information Problem 05.088 Mixing process An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg. K. The enthalpies of air are obtained from air 297. 18 kJ/kg. Use data from the steam table. table h₁ 280. 13 kJ/kg, h₂ = 307.23 kJ/kg, and hroom Cold air 7°C Warm air 34°C 어 Room 24°C Problem 05.088.a - Mixing process Using variable specific heats, determine the mixture temperature at the inlet of the room. The mixture temperature at the inlet of the room is °C.
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
Chapter3: Refrigeration And Refrigerants
Section: Chapter Questions
Problem 31RQ: Define a near-azeotropic refrigerant blend, and give twoexamples.
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Transcribed Image Text:Required information
Problem 05.088 - Mixing process
An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the
conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s
while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to
cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg- K. The enthalpies of air are obtained from air
307.23 kJ/kg, and hroom 297. 18 kJ/kg. Use data from the steam table.
table h₁
=
280. 13 kJ/kg, h₂
=
3
Cold air
7°C
Warm air
34°C
Room
24°C
Problem 05.088.b Mixing process
Determine the rate of heat gain of the room.
The rate of heat gain of the room is
kW. (Round the final answer to three decimal places.)
Transcribed Image Text:Required information
Problem 05.088 Mixing process
An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the
conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.570 m³/s
while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to
cold airstreams is 1.6. The gas constant of air is R 0.287 kPa - m³/kg. K. The enthalpies of air are obtained from air
297. 18 kJ/kg. Use data from the steam table.
table h₁ 280. 13 kJ/kg, h₂ = 307.23 kJ/kg, and hroom
Cold air
7°C
Warm air
34°C
어
Room
24°C
Problem 05.088.a - Mixing process
Using variable specific heats, determine the mixture temperature at the inlet of the room.
The mixture temperature at the inlet of the room is
°C.
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