Symbols
c	Specific heat, $\mathrm{kJ}·{\mathrm{kg}}^{-1}·{\mathrm{K}}^{-1}$
E	Exergy rate, kW
$\mathrm{h}$	Specific enthalpy, $\mathrm{kJ}·{\mathrm{kg}}^{-1}$
k	Thermal conductivity, $\mathrm{W}·{\mathrm{m}}^{-1}·{\mathrm{K}}^{-1}$
$\mathrm{m}$	Mass flow rate, $\mathrm{kg}·{\mathrm{s}}^{-1}$
P	Pressure, kPa
Q	Thermal capacity, kW
$\mathrm{s}$	Specific entropy, $\mathrm{kJ}·{\mathrm{kg}}^{-1}·{\mathrm{K}}^{-1}$
T	temperature, K or °C
W	Power, kW
Greek
$\mathsf{\eta }$	Efficiency
$\mathsf{\mu }$	Dynamic viscosity, Pa $·\mathrm{s}$
$\mathsf{\rho }$	Density, $\mathrm{kg}·{\mathrm{m}}^{-3}$
$\mathsf{\phi }$	Volume fraction
$\mathsf{\omega }$	Mass fraction
Abbreviations
COP	Coefficient of performance
GWP	Global Warming Potential
HCs	Hydrocarbons
HCFOs	Hydrochlorofluoroolefins
HFCs	Hydrofluorocarbons
HFOs	Hydrofluoroolefins
NP	Nanoparticle
NR	Nanorefrigerant
ODP	Ozone Depletion Potential
RI	Relative irreversibility
VCRC	Vapor-compression refrigeration cycle
Subscripts
1, 2, 3..	State point
con	Condenser
comp	Compressor
des	destruction
eva	Evaporator
exp	Expansion valve
imp	Improvement of energy efficiency
is	Isentropic process
NR	Nanorefrigerant
R	Refrigerant