A commercial refrigeration system with refrigerant R-134a as working fluid is used to keep the refrigerated space at -25 °C by rejecting waste heat to cooling water that enters the condenser at 15 °C as saturated liquid, as shown in Figure Q3, leaves at 30 °C as saturated liquid as well and flow rate is 1080 kg/h. The refrigerant enters the compressor at 500 kPa and leaves at 1.4 MPa and 68 °C. The pressure drop inside the condenser is 86 % and the density is 200 kg/m³. Determine : (i) refrigerant mass flow rate, (ii) compressor power input, (iii) the refrigerant load, (iv) coefficient of performance (COP), and (v) COP Carnot refrigerant system and compressor power input at minimum temperature
A commercial refrigeration system with refrigerant R-134a as working fluid is used to keep the refrigerated space at -25 °C by rejecting waste heat to cooling water that enters the condenser at 15 °C as saturated liquid, as shown in Figure Q3, leaves at 30 °C as saturated liquid as well and flow rate is 1080 kg/h. The refrigerant enters the compressor at 500 kPa and leaves at 1.4 MPa and 68 °C. The pressure drop inside the condenser is 86 % and the density is 200 kg/m³. Determine : (i) refrigerant mass flow rate, (ii) compressor power input, (iii) the refrigerant load, (iv) coefficient of performance (COP), and (v) COP Carnot refrigerant system and compressor power input at minimum temperature
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 commercial refrigeration system with refrigerant R-134a as working fluid is used to keep the
refrigerated space at -25 °C by rejecting waste heat to cooling water that enters the condenser at
15 °C as saturated liquid, as shown in Figure Q3, leaves at 30 °C as saturated liquid as well and
flow rate is 1080 kg/h. The refrigerant enters the compressor at 500 kPa and leaves at 1.4 MPa and
68 °C. The pressure drop inside the condenser is 86 % and the density is 200 kg/m³. Determine :
Q3
(i)
refrigerant mass flow rate,
(ii)
compressor power input,
(iii)
the refrigerant load,
(iv)
coefficient of performance (COP), and
(v)
COP Carnot refrigerant system and compressor power input at minimum temperature](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7f1e8e29-c224-4dc0-b533-9e5d4dacb769%2F264fbca2-cd29-4744-9dbd-5cd721fab138%2F9f4bycx_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A commercial refrigeration system with refrigerant R-134a as working fluid is used to keep the
refrigerated space at -25 °C by rejecting waste heat to cooling water that enters the condenser at
15 °C as saturated liquid, as shown in Figure Q3, leaves at 30 °C as saturated liquid as well and
flow rate is 1080 kg/h. The refrigerant enters the compressor at 500 kPa and leaves at 1.4 MPa and
68 °C. The pressure drop inside the condenser is 86 % and the density is 200 kg/m³. Determine :
Q3
(i)
refrigerant mass flow rate,
(ii)
compressor power input,
(iii)
the refrigerant load,
(iv)
coefficient of performance (COP), and
(v)
COP Carnot refrigerant system and compressor power input at minimum temperature
![30°C
water in 15°C
Он
1.4 MPa
68°C
Condenser
Expansion
valve
E-
Compressor
-Wit
4
1
Evaporator
-25°C
QL
500 kPa
20°C
Figure Q3
3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7f1e8e29-c224-4dc0-b533-9e5d4dacb769%2F264fbca2-cd29-4744-9dbd-5cd721fab138%2Fc10xv5d_processed.jpeg&w=3840&q=75)
Transcribed Image Text:30°C
water in 15°C
Он
1.4 MPa
68°C
Condenser
Expansion
valve
E-
Compressor
-Wit
4
1
Evaporator
-25°C
QL
500 kPa
20°C
Figure Q3
3.
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