An ammonia ice plant operates between a condenser temperature of 35oC and evaporator of –15oC. It produces 10 metric tons of ice per day from water at 30oC to ice at –5oC. Assuming simple saturation cycle, determine the horsepower of the motor if the adiabatic efficiency of the compressor ηc = 0.80 and mechanical efficiency ηm = 0.90. The specific heat of ice is 2.094 kJ/kg.oC and the latent heat is 335 kJ/kg. From the table for ammonia the following enthalpies are: condenser entrance = 1703 kJ/kg, exit = 366.1 kJ/kg; compressor entrance = 1443.9 kJ/kg, exit = 1703 kJ/kg A. 14.55 hp B. 24.55 hp C. 34.55 hp D. 44.55 hp
An ammonia ice plant operates between a condenser temperature of 35oC and evaporator of –15oC. It produces 10 metric tons of ice per day from water at 30oC to ice at –5oC. Assuming simple saturation cycle, determine the horsepower of the motor if the adiabatic efficiency of the compressor ηc = 0.80 and mechanical efficiency ηm = 0.90. The specific heat of ice is 2.094 kJ/kg.oC and the latent heat is 335 kJ/kg. From the table for ammonia the following enthalpies are: condenser entrance = 1703 kJ/kg, exit = 366.1 kJ/kg; compressor entrance = 1443.9 kJ/kg, exit = 1703 kJ/kg A. 14.55 hp B. 24.55 hp C. 34.55 hp D. 44.55 hp
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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An ammonia ice plant operates between a condenser temperature of 35oC and
evaporator of –15oC. It produces 10 metric tons of ice per day from water at 30oC
to ice at –5oC. Assuming simple saturation cycle, determine the horsepower of
the motor if the adiabatic efficiency of the compressor ηc = 0.80 and mechanical
efficiency ηm = 0.90. The specific heat of ice is 2.094 kJ/kg.oC and the latent heat
is 335 kJ/kg. From the table for ammonia the following enthalpies are: condenser
entrance = 1703 kJ/kg, exit = 366.1 kJ/kg; compressor entrance = 1443.9 kJ/kg,
exit = 1703 kJ/kg
A. 14.55 hp B. 24.55 hp C. 34.55 hp D. 44.55 hp
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