(1) Atwo-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -35°C and the high-pressure condenser is at 1514.2 kPa. The cascade condenser is a direct-contract type. The refrigeration load is 90 tons. Determine (a) the mass flow rate in the low-pressure loop, (b) the mass flow rate in the high-pressure loop, (c) the power required, (d) the COP, and (e) the quantity of the fluid entering the evaporator.

(1) Atwo-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -35°C and the high-pressure condenser is at 1514.2 kPa. The cascade condenser is a direct-contract type. The refrigeration load is 90 tons. Determine (a) the mass flow rate in the low-pressure loop, (b) the mass flow rate in the high-pressure loop, (c) the power required, (d) the COP, and (e) the quantity of the fluid entering the evaporator.

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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Concept explainers

Strengthening of Alloys

Strengthening of the alloys is required as metals become weak due to various lattice defects, metal bonding phenomena. The strength of the metals is not enough for any mechanical work. The internal dislocations of any metals arise due to forming processes. Due to the movement of these dislocations, the metals are plastically deformed.

Question

(1) A two-stage cascade refrigeration system uses ammonia
as the working substance. The evaporator is at -35°C and the
high-pressure condenser is at 1514.2 kPa. The cascade condenser
is a direct-contract type. The refrigeration load is 90 tons.
Determine (a) the mass flow rate in the low-pressure loop, (b)
the mass flow rate in the high-pressure loop, (c) the power
required, (d) the COP, and (e) the quantity of the fluid entering
the evaporator.
Ans. (a) 0.2572 kg/s, (b) 0.341 kg/s,-
(c) 116.08 kW, (d) 2.73, (e) 10.37%

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I need help I missed classes and idk how to do it ! Help