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Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db- temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s. Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine (i) (ii) (iii) (iv) db-temperature and relative humidity of the supply air to the space, wb-temperature of the space, temperature of the air entering the cooling coil, and refrigeration capacity of the cooling coil.

Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db- temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s. Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine (i) (ii) (iii) (iv) db-temperature and relative humidity of the supply air to the space, wb-temperature of the space, temperature of the air entering the cooling coil, and refrigeration capacity of the cooling coil.

Elements Of Electromagnetics
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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Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db- temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s. Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine (i) (ii) (ii) (iv) db-temperature and relative humidity of the supply air to the space, wb-temperature of the space, temperature of the air entering the cooling coil, and refrigeration capacity of the cooling coil. 100 105 110 115 120 kJ/kg(d.a) 30 95 29 1. 28 90 27 85 26 SENSIBLE HEAT TOTAL HEAT Qt 80 25 1.0 24 75 23 70 22 65. ENTHALPY HUMIDITY RATIO aw dH 21 60 20 19 55 18 50 17 45 16 15 40 14 35 13 30 12 500 :- 25 20 11 10 9 15 8 10 7 g0% 6 5 5 10% 3 2 1 -10 -10 -5 0 5 10 15 20 25 30 35 40 50 45 Dry Bulb Temperature, °C. Pressure = 101325 Pa Humidity Ratio, g/kg(d.a) 09 %08 70% %06 -0.5-
Transcribed Image Text:Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db- temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s. Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine (i) (ii) (ii) (iv) db-temperature and relative humidity of the supply air to the space, wb-temperature of the space, temperature of the air entering the cooling coil, and refrigeration capacity of the cooling coil. 100 105 110 115 120 kJ/kg(d.a) 30 95 29 1. 28 90 27 85 26 SENSIBLE HEAT TOTAL HEAT Qt 80 25 1.0 24 75 23 70 22 65. ENTHALPY HUMIDITY RATIO aw dH 21 60 20 19 55 18 50 17 45 16 15 40 14 35 13 30 12 500 :- 25 20 11 10 9 15 8 10 7 g0% 6 5 5 10% 3 2 1 -10 -10 -5 0 5 10 15 20 25 30 35 40 50 45 Dry Bulb Temperature, °C. Pressure = 101325 Pa Humidity Ratio, g/kg(d.a) 09 %08 70% %06 -0.5-
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