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Ql:- Multi-evaporator system with single compressor and individual expansion valves system used refrigerant 143a at two different temperatures with a single compressor and a single condenser. The low- temperature evaporator operates at -20 °C with saturated vapor at its exit and has a refrigerating capacity of 4 tons. The higher-temperature evaporator produces saturated vapor at 3 bar at its exit and has a refrigerating capacity of 2.5 tons. The compression with isentropic efficiency 85% to the condenser pressure of 10 bar. There are no significant pressure drops in the flows through the condenser and the two evaporators, and the refrigerant leaves the condenser as saturated liquid at 10 bar. Draw the schematic diagram of the cycle and p-h diagram then calculate: 1) The mass flow rate of refrigerant through each evaporator. 2) The compressor power input, in kW. 3) The C.O.P.

Ql:- Multi-evaporator system with single compressor and individual expansion valves system used refrigerant 143a at two different temperatures with a single compressor and a single condenser. The low- temperature evaporator operates at -20 °C with saturated vapor at its exit and has a refrigerating capacity of 4 tons. The higher-temperature evaporator produces saturated vapor at 3 bar at its exit and has a refrigerating capacity of 2.5 tons. The compression with isentropic efficiency 85% to the condenser pressure of 10 bar. There are no significant pressure drops in the flows through the condenser and the two evaporators, and the refrigerant leaves the condenser as saturated liquid at 10 bar. Draw the schematic diagram of the cycle and p-h diagram then calculate: 1) The mass flow rate of refrigerant through each evaporator. 2) The compressor power input, in kW. 3) The C.O.P.

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
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Q1:- Multi-evaporator system with single compressor and individual expansion valves system used refrigerant 143a at two different temperatures with a single compressor and a single condenser. The low- temperature evaporator operates at -20°C with saturated vapor at its exit and has a refrigerating capacity of 4 tons. The higher-temperature evaporator produces saturated vapor at 3 bar at its exit and has a refrigerating capacity of 2.5 tons. The compression with isentropic efficiency 85% to the condenser pressure of 10 bar. There are no significant pressure drops in the flows through the condenser and the two evaporators, and the refrigerant leaves the condenser as saturated liquid at 10 bar. Draw the schematic diagram of the cycle and p-h diagram then calculate: 1) The mass flow rate of refrigerant through each evaporator. 2) The compressor power input, in kW. 3) The C.O.P. 4) The rate of heat transfer from the refrigerant passing through the condenser, in kW. 5) Volumetric displacement of the compressor cylinder if the clearance ratio is 5% and k=1.13.
Transcribed Image Text:Q1:- Multi-evaporator system with single compressor and individual expansion valves system used refrigerant 143a at two different temperatures with a single compressor and a single condenser. The low- temperature evaporator operates at -20°C with saturated vapor at its exit and has a refrigerating capacity of 4 tons. The higher-temperature evaporator produces saturated vapor at 3 bar at its exit and has a refrigerating capacity of 2.5 tons. The compression with isentropic efficiency 85% to the condenser pressure of 10 bar. There are no significant pressure drops in the flows through the condenser and the two evaporators, and the refrigerant leaves the condenser as saturated liquid at 10 bar. Draw the schematic diagram of the cycle and p-h diagram then calculate: 1) The mass flow rate of refrigerant through each evaporator. 2) The compressor power input, in kW. 3) The C.O.P. 4) The rate of heat transfer from the refrigerant passing through the condenser, in kW. 5) Volumetric displacement of the compressor cylinder if the clearance ratio is 5% and k=1.13.
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