Performance of Air-Conditioning System with Different Nanoparticle Composition Ratio of Hybrid Nanolubricant

Abstract

To reduce fuel consumption, the automotive air-conditioning (AAC) system’s coefficient of performance (COP) needs to be improved. The use of a diverse selection of hybrid nanolubricant composition ratios is expected to improve the properties of single nanolubricants, resulting in improved AAC system performance. The goal of this study was to find the best combination of hybrid nanolubricants for the best performance of the AAC system. Al2O3-SiO2/PAG hybrid nanolubricants at 0.06% volume concentrations with various composition ratios (20:80, 40:60, 50:50, 60:40, and 80:20) were investigated. An initial refrigerant charge of up to 155 g and a compressor speed of up to 2100 rpm were used in the experiment. The cooling capacity, compressor work, and COP of the AAC system were measured to determine its efficiency. The COP enhancement and compressor work reduction were recorded up to 16.31% and 18.65% for the 60:40 composition ratio, respectively. The maximum cooling capacity up to 75.84% was recorded for the 80:20 ratio, followed by 60:40. The maximum COP value of 8.81 for 155 g of hybrid nanolubricants was obtained at 900 rpm with a 60:40 composition ratio. Therefore, for optimal performance in the AAC system, a 60:40 composition ratio of the Al2O3-SiO2/PAG nanolubricant combination is strongly recommended.

A Tribological Analysis of PAO-Based Hybrid SiO2-TiO2 Nanolubricants

“…Equation 1 was considered in the determination of mass of nanoparticles for a specific volume concentration of nanolubricants. Various researchers have utilised a similar equation to prepare nanolubricants [22][23][24].…”

CFD simulation of a shell and multiple tubes condensing heat exchanger in a modified microwave plant applied for reprocessing End of Life Tires (ELTs)

“…In addition, high temperatures and heating rates can be obtained through microwave heating (Ludlow‐Palafox & Chase, 2001) demonstrating remarkably high conversion efficiency of electrical energy into heat (80%– 85%) (Green et al., 2019; Osepchuk, 2002). Besides, there are numerous works in this regard related to the cooling and air conditioning systems (Alqahtani et al., 2023; Hussain et al., 2022; Zawawi et al., 2022).…”

Durable Nanofluids‐Infused Hierarchical Surfaces with High Corrosion and Abrasion Resistance

“…[24] Recently, the functionalized nanofluids prepared by adding magnetic nanoparticles to lubricating oil have given SLIPS broader application prospects in anti-icing and other fields. [25][26][27][28][29] Mixing perfluorinated ligands with other nanoparticles with which they can form strong interactions can significantly reduce the vapor pressure of the compounds. Perfluorinated ligands are used to create self-suspending nanoparticle fluids, which are used as lubricants in SLIPS to highly inhibit the evaporation rate.…”