elp Delay 1. An ice-making machine is required to remove 0.7 Btu/s of heat from water to produce ice (Qin). This ice machine is a refrigerator that operates steadily using R134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 20 psia and leaves the condenser as saturated liquid at 80 psia. Draw a diagram showing the components of the refrigeration system inside the machine b. Show the cycle on a T-s diagram Calculate the work input required by the machine [0.176 hp or 0.124 Btu/s] a. C. d. What is the COP of this device? What does this represent? [5.6]

elp Delay 1. An ice-making machine is required to remove 0.7 Btu/s of heat from water to produce ice (Qin). This ice machine is a refrigerator that operates steadily using R134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 20 psia and leaves the condenser as saturated liquid at 80 psia. Draw a diagram showing the components of the refrigeration system inside the machine b. Show the cycle on a T-s diagram Calculate the work input required by the machine [0.176 hp or 0.124 Btu/s] a. C. d. What is the COP of this device? What does this represent? [5.6]

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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ode
Delay
1. An ice-making machine is required to remove 0.7 Btu/s of heat from water to produce ice (Qin). This
ice machine is a refrigerator that operates steadily using R134a as the working fluid. The refrigerant
enters the compressor as saturated vapor at 20 psia and leaves the condenser as saturated liquid at
80 psia.
Draw a diagram showing the components of the refrigeration system inside the machine
b. Show the cycle on a T-s diagram
а.
С.
Calculate the work input required by the machine [0.176 hp or 0.124 Btu/s]
d. What is the COP of this device? What does this represent? [5.6]

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4. The values of a vapor compression refrigeration cycle were given below. Calculate the values of refrigerant flow rate, refrigeration capacity, and the COP of the system. T1= Evaporator water outlet = 10 °C T2= Evaporator water inlet = 16 °C T3= Condenser water inlet = 16 °C T4= Condenser water outlet = 22°C Cooling water flow rate = 1.5 L/min Heating water flow rate = 1.5 L/min Enthalpy of R134a in evaporator outlet = 305 kj/kg, Enthalpy of R134a in evaporator inlet =115 kj/kg Enthalpy of R134a in condenser inlet =327 kj/kg
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The values of a vapor compression refrigeration cycle were given below. Calculate the values ofrefrigerant flow rate, refrigeration capacity, and the COP of the system.T1= Evaporator water outlet = 10 °CT2= Evaporator water inlet = 16 °CT3= Condenser water inlet = 16 °CT4= Condenser water outlet = 22°CCooling water flow rate = 1.5 L/minHeating water flow rate = 1.5 L/minEnthalpy of R134a in evaporator outlet = 305 kj/kg,Enthalpy of R134a in evaporator inlet =115 kj/kgEnthalpy of R134a in condenser inlet =327 kj/kg
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