For Questions 5 to 7 The winter air conditioning system has a preheat coil, an air washer, and a reheat coil as processing units. It supplies air at 38°C db-temperature to a space maintained at 21°C db- temperature and 13°C wb-temperature. The sensible and latent heat loads on the space are 50 kW and 25 kW, respectively. Of the return air from the space, 40% by dry air mass is discharged to the ambient and replaced with fresh outdoor air at 2°C db-temperature and 95% relative humidity. In the preheater, the air is heated to a db-temperature of 21°C. Assume that the water added in the air washer is at the wb-temperature of the air entering it. The pressure is constant at 95 kPa. Determine: Question 5 The mass flow rate of supply air in kg/s. Round your answer to 3 decimal places. Add your answer Question 6 The rate of heat input in the preheat coil in kW. Round your answer to 2 decimal places. Question 7 The mass flow rate of water sprayed in the air washer in kg/s. Hint: moisture level is constant through the preheater and the reheater, as well as through the fan. Round your answer to 4 decimal places. Add your answer

For Questions 5 to 7 The winter air conditioning system has a preheat coil, an air washer, and a reheat coil as processing units. It supplies air at 38°C db-temperature to a space maintained at 21°C db- temperature and 13°C wb-temperature. The sensible and latent heat loads on the space are 50 kW and 25 kW, respectively. Of the return air from the space, 40% by dry air mass is discharged to the ambient and replaced with fresh outdoor air at 2°C db-temperature and 95% relative humidity. In the preheater, the air is heated to a db-temperature of 21°C. Assume that the water added in the air washer is at the wb-temperature of the air entering it. The pressure is constant at 95 kPa. Determine: Question 5 The mass flow rate of supply air in kg/s. Round your answer to 3 decimal places. Add your answer Question 6 The rate of heat input in the preheat coil in kW. Round your answer to 2 decimal places. Question 7 The mass flow rate of water sprayed in the air washer in kg/s. Hint: moisture level is constant through the preheater and the reheater, as well as through the fan. Round your answer to 4 decimal places. Add your answer

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

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 13RQ: If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F,...

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