A two stage cascade refrigeration system uses R-11 as the working substance. The evaporator is at -30 0C and the high pressure condenser is at 300C. The cascade condenser is a direct contact type. The refrigeration load is 28 tons. Given that, h2 = 391 kJ/kg; h6 = 407 kJ/kg Determine: 1) the mass flow rate in the low pressure loop in kg/s 2) mass flow rate in the high pressure loop, in kg/s 3) total power requirement in KW
A two stage cascade refrigeration system uses R-11 as the working substance. The evaporator is at -30 0C and the high pressure condenser is at 300C. The cascade condenser is a direct contact type. The refrigeration load is 28 tons. Given that, h2 = 391 kJ/kg; h6 = 407 kJ/kg Determine: 1) the mass flow rate in the low pressure loop in kg/s 2) mass flow rate in the high pressure loop, in kg/s 3) total power requirement in KW
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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A two stage cascade refrigeration system uses R-11 as the working substance. The evaporator is at -30 0C and the high pressure condenser is at 300C. The cascade condenser is a direct contact type. The refrigeration load is 28 tons. Given that, h2 = 391 kJ/kg; h6 = 407 kJ/kg
Determine:
1) the mass flow rate in the low pressure loop in kg/s
2) mass flow rate in the high pressure loop, in kg/s
3) total power requirement in KW
4.) COP
5.) heat rejected in the condenser, KW
6.) amount of cooling water needed for a temp rise of 130C. in kg/s
7.) amount of ice (kg)for a 10 hrs operation if the initial temp of water is 34 0C to ice at 40C. Answer in kg.
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