Investigation on the Performance of Domestic Refrigerator with Zirconium Oxide-R134a Nanorefrigerant

Table 1

Comparison of various nanorefrigerants for the performance enhancement of VCRS.

Author	Ref system	Ref. type	Oil in compressor	Nanoparticles			Test rig	COP	System power consumption
				Type	Concentration	Weight in g per ml of oil
Syed Shaheed [28]	VCRS	CARE 30		Al2O3; TiO2
Shaik Imaduddin [29]	VCRS	R134a	POE	TiO2		2.5 g/350 ml	YES	22.5% higher
Sendil Kumar et al. [30]	VCRS	R134a	PAG (poly alkylene glycol)	Al2O3	0.2%V	PAG-150 ml, 180 ml, and 200 ml	YES	3.5	10.32% reduced
Fadhilah et al. [31]	Copper tube of an evaporator coil	R134a		CuO	1%V
Coumaressin et al. [32]	VCRS	R134a		CuO	0.05 to 1%		YES
Sanukrishna et al. [33]	VCRS	R134a	PAG (poly alkylene glycol)	CuO	0.06%, 0.08%, 0.1% by volume		Yes
Sendil Kumar et al. [34]	VCRS	R152a		ZnO	0.1%V, 0.3%V, 0.5%V		Yes		21% less@0.5%V
Present study	VCRS		PAG (poly alkylene glycol)	ZrO2		0.2 g/L	Yes	2.1% higher	Energy consumption is reduced by 6.25%; Refrigeration capacity increased by 38.7%%; Pull downtime decreased by 23.3%