Search Results - "Azmi, W H"

Experimental determination of turbulent forced convection heat transfer and friction factor with SiO2 nanofluid by Azmi, W.H., Sharma, K.V., Sarma, P.K., Mamat, Rizalman, Anuar, Shahrani, Dharma Rao, V.

“…•Experiments are undertaken with SiO2 nanofluid up to 4% concentration.•The heat transfer coefficient increased up to 3% and decreased thereafter.•The friction…”
Get full text

An overview of vapor compression refrigeration system performance enhancement mechanism by utilizing nanolubricants by Nugroho, Agus, Mamat, Rizalman, Bo, Zhang, Azmi, W. H., Alenezi, Raslan, Najafi, Gholamhassan

“…Nanolubricants are dispersed nano-scales solid particles in a base fluid. Due to high demand for higher efficiency in thermal application systems,…”
Get full text

A review on thermo-physical properties and heat transfer applications of single and hybrid metal oxide nanofluids by Azmi, W. H., Zainon, S. N. M., Hamid, K. A., Mamat, R.

“…Nanofluids have been widely explored by various investigators for different types of nanomaterials either the single nanoparticles or hybrid types. This is due…”
Get full text

Heat transfer performance of TiO2–SiO2 nanofluids in a tube with wire coil inserts by Abdul Hamid, K., Azmi, W.H., Mamat, Rizalman, Sharma, K.V.

“…•Thermal hydraulic performance of TiO2-SiO2 nanofluids with wire coil inserts.•Experiments are undertaken for 0.5–3.0% concentration and P/D of…”
Get full text

Comparison of convective heat transfer coefficient and friction factor of TiO2 nanofluid flow in a tube with twisted tape inserts by Azmi, W.H., Sharma, K.V., Sarma, P.K., Mamat, Rizalman, Anuar, Shahrani

“…Nanofluids have gained extensive attention due to their role in improving the efficiency of thermal systems. The present study reports a further enhancement in…”
Get full text

Experimental investigation on stability and thermo-physical properties of Al2O3–SiO2/PAG nanolubricants with different nanoparticle ratios by Zawawi, N. N. M., Azmi, W. H., Sharif, M. Z., Najafi, G.

“…The thermo-physical properties enhancement of nanolubricants can improve the heat transfer performance in refrigeration system. In this study, thermo-physical…”
Get full text

Performance augmentation of retrofitted sustainable R1234yf in R134a air conditioning system using Al2O3–SiO2 hybrid nanolubricant by Sharif, M. Z., Azmi, W. H., Ghazali, M. F., Ali, Hafiz Muhammad

“…Low global warming potential hydrofluoroolefin-1234yf (R1234yf) is an alternative green refrigerant for the automotive air conditioning (AAC) system to replace…”
Get full text

Experimental determination of thermophysical properties of Indonesian fly-ash nanofluid for heat transfer applications by Kanti, Praveen, Sharma, Korada Viswanatha, C. G., Ramachandra, Azmi, W. H.

“…The heat transfer fluid's thermal properties are a significant topic of current research. In this study, coal fly ash nanoparticles of 14 nm average diameter…”
Get full text

Heat transfer and electrical discharge of hybrid nanofluid coolants in a fuel cell cooling channel application by Zakaria, I.A., Mohamed, W.A.N.W., Azid, N.H.A., Suhaimi, M.A., Azmi, W.H.

“…•Hybrid TiO2:SiO2 nanofluid coolants for advanced fuel cell thermal management.•Experimentally-derived cooling rate and electrical power loss relationship.•A…”
Get full text

Experimental investigation on thermo-physical properties of metal oxide composite nanolubricants by Zawawi, N.N.M., Azmi, W.H., Redhwan, A.A.M., Sharif, M.Z., Samykano, M.

“…•Measurement of thermo-physical properties for metal oxide composite nanolubricants.•Measurements are undertaken at different volume concentrations and…”
Get full text

Performance of Al2O3-SiO2/PAG composite nanolubricants in automotive air-conditioning system by Zawawi, N.N.M., Azmi, W.H., Ghazali, M.F.

“…•Performance investigation of Al2O3-SiO2/PAG composite nanolubricant in AAC system.•Investigation is conducted using 60:40 ratio for up to 0.06% volume…”
Get full text

Thermal–electrical–hydraulic properties of Al2O3–SiO2 hybrid nanofluids for advanced PEM fuel cell thermal management by Khalid, Saifuddin, Zakaria, Irnie, Azmi, W. H., Mohamed, W. A. N. W.

“…Hybrid nanofluid is a new revolutionized cooling liquid with improved thermo-physical properties as compared to conventional coolant. This paper presents the…”
Get full text

Recent Progress on Stability and Thermo-Physical Properties of Mono and Hybrid towards Green Nanofluids by Zainon, S N M, Azmi, W H

“…Many studies have shown the remarkable enhancement of thermo-physical properties with the addition of a small quantity of nanoparticles into conventional…”
Get full text

Numerical and thermo-energy analysis of cycling in automotive air-conditioning operating with hybrid nanolubricants and R1234yf by Sharif, M. Z., Azmi, W. H., Ghazali, M. F., Zawawi, N. N. M., Ali, H. M.

“…Studies on automotive air-conditioning (AAC) systems involving compressor on-off cycling are still limited. This study focuses on improving the cycling of the…”
Get full text

Performance improvement in mobile air conditioning system using Al2O3/PAG nanolubricant by Redhwan, A. A. M., Azmi, W. H., Sharif, M. Z., Mamat, R., Samykano, M., Najafi, G.

“…This paper presents the investigation of Al 2 O 3 /PAG nanolubricant performance for a compact vehicle mobile air conditioning (MAC) system. The Al 2 O 3 /PAG…”
Get full text

Numerical validation of experimental heat transfer coefficient with SiO2 nanofluid flowing in a tube with twisted tape inserts by Azmi, W.H., Sharma, K.V., Sarma, P.K., Mamat, Rizalman, Anuar, Shahrani, Syam Sundar, L.

“…A numerical model has been developed for turbulent flow of nanofluids in a tube with twisted tape inserts. The model is based on the assumption that van Driest…”
Get full text

Energy saving in automotive air conditioning system performance using SiO2/PAG nanolubricants by Sharif, M. Z., Azmi, W. H., Redhwan, A. A. M., Mamat, R., Najafi, G.

“…The use of automotive air conditioning (AAC) nowadays is essential because of the hot climate and global warming. The AAC increases the overall fuel…”
Get full text

Efficiency enhancement of building multi-layer solar collector with SiO2–TiO2 hybrid nanofluids by Zawawi, N. N. M., Azmi, W. H., Majid, Z. A. A., Rahim, R. A., Ali, H. M.

“…Due to the depletion of conventional energy sources and its limitless resources, solar energy is currently being considered as a viable alternative, especially…”
Get full text

Response surface methodology (RSM) based multi-objective optimization of fusel oil -gasoline blends at different water content in SI engine by Awad, Omar I., Mamat, R., Ali, Obed M., Azmi, W.H., Kadirgama, K., Yusri, I.M., Leman, A.M., Yusaf, T.

“…•The optimal ratio ratio of fusel oil–gasoline blended fuels is proposed.•The water content of fusel oil was reduced from 13.5% to 6.5%.•The heating value of…”
Get full text

Application of response surface methodology in optimization of automotive air-conditioning performance operating with SiO2/PAG nanolubricant by Redhwan, A. A. M., Azmi, W. H., Najafi, G., Sharif, M. Z., Zawawi, N. N. M.

“…The effect of compressor speed, initial refrigerant charge and volume concentrations of SiO 2 /PAG nanolubricant on the performance of automotive…”
Get full text