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Heat and Mass Transfer

, Volume 54, Issue 5, pp 1367–1380 | Cite as

Component-wise exergy and energy analysis of vapor compression refrigeration system using mixture of R134a and LPG as refrigerant

  • Jatinder Gill
  • Jagdev Singh
Original

Abstract

In this work, the experimental examination was carried out using a mixture of R134a and LPG refrigerant (consisting of R134a and LPG in a proportion of 28:72 by weight) as a replacement for R134a in a vapor compression refrigeration system. Exergy and energy tests were carried out at different evaporator and condenser temperatures with controlled environmental conditions. The results showed that the exergy destruction in the compressor, condenser, evaporator, and a capillary tube of the R134a / LPG refrigeration system was found lower by approximately 11.13–3.41%, 2.24–3.43%, 12.02–13.47% and 1.54–5.61% respectively. The compressor exhibits the highest level of destruction, accompanied by a condenser, an evaporator and a capillary tube in refrigeration systems. The refrigeration capacity, COP and power consumption of the compressor of the R134a /LPG refrigeration system were detected higher and lower compared to the R134a refrigeration system by about 7.04–11.41%, 15.1–17.82%, and 3.83–8.08% respectively. Also, the miscibility of R134a and LPG blend with mineral oil discovered good. The R134a and LPG refrigerant mixture proposed in this study perform superior to R134a from component-wise exergy and energy analyses under similar experimental conditions.

Nomenclature

e

Specific Exergy, kJ kg−1

S

Entropy, kJ kg−1 K−1

E

Exergy Destruction (kW)

T

Temperature K

COP

Coefficient of performance

ODP

Ozone depletion potential

P

Pressure, Bar

h

Enthalpy, kJ kg−1

W

Compressor power kW

Q

Refrigeration capacity, kW

MR

Refrigerant charge, g

d

Diameter of capillary tube, mm

ΔTsub

Inlet Sub cooling, K

L

Capillary tube length, m

D

Coil Diameter, mm

LPG

Liquefied petroleum gas

GWP

Global Warming Potential

Greek letters

ξ

Mass flow rate, kg s−1

μ

Dynamic viscosity, Pa-s

Subscripts

evap

Evaporator

Cap

Capillary

comp

Compressor

cond

Condenser

in

Inlet

out

Outlet

el

Electrical

f

fluid

h

heater

Notes

Acknowledgements

The authors would like to acknowledge the IKG PTU, Kapurthala and BCET Gurdaspur for their excellent support.

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIKGPTUKapurthalaIndia
  2. 2.Faculty of Mechanical Engineering DepartmentBCET GurdaspurPunjabIndia

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