9. The following data refer to summer air conditioning of a restaurant : = 27°C DBT and 21°C WBT Inside design conditions Outside design conditions = 38°C DBT and 27°C WBT ,= 126 000 kJ/h Sensible heat load Latent heat load = 50 400 kJ /h The outside air is supplied at the rate of 20 m³ /min directly into the room through ventilators and by infiltration. The outside air to be conditioned is passed through a cooling coil which has an apparatus dew point of 12°C and 60% of the total air is recirculated from the conditioned space and mixed with conditioned air after the cooling coil. Find: (a) condition of air after the cooling coil before mixing with recirculated air; (b) condition of air entering the restaurant; (c) mass of fresh air entering the cooling coil; (d) by-pass factor of the cooling coil; and (e) total refrigeration load of the cooling coil. [Ans. 18.5°C, 16.5°C: 22.5°C, 8.5°C; 267 kg/min; 0.25; 47.5 TR]

9. The following data refer to summer air conditioning of a restaurant : = 27°C DBT and 21°C WBT Inside design conditions Outside design conditions = 38°C DBT and 27°C WBT ,= 126 000 kJ/h Sensible heat load Latent heat load = 50 400 kJ /h The outside air is supplied at the rate of 20 m³ /min directly into the room through ventilators and by infiltration. The outside air to be conditioned is passed through a cooling coil which has an apparatus dew point of 12°C and 60% of the total air is recirculated from the conditioned space and mixed with conditioned air after the cooling coil. Find: (a) condition of air after the cooling coil before mixing with recirculated air; (b) condition of air entering the restaurant; (c) mass of fresh air entering the cooling coil; (d) by-pass factor of the cooling coil; and (e) total refrigeration load of the cooling coil. [Ans. 18.5°C, 16.5°C: 22.5°C, 8.5°C; 267 kg/min; 0.25; 47.5 TR]

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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