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Papers by Dr. Hazim Moria
Effect of Chenodeoxycholic Acid on the Performance of Dye-sensitized Solar Cells utilizing Pinang Palm (Areca catechu) Dye
Sains Malaysiana
This study examined and described the optical and photovoltaic (PV) characterizations of the Frui... more This study examined and described the optical and photovoltaic (PV) characterizations of the Fruit Areca catechu (pinang) as a new type of organic sensitizer. Recent reports stated that including chenodeoxycholic acid (CDCA) in the dye improves the performance of dye-sensitized solar cells (DSSCs). The effectiveness of PV dye was investigated by applying it in a DSSC. The absorption spectra indicated that natural dyes with CDCA has an excellent stabilizing ability. The Fourier-transform infrared spectra indicated the existence of carboxylic and hydroxyl functional groups in the naturally extracted dye. These functional groups were responsible for the rapid electron transfer and strong electronic linkages of interactions within the TiO2 surface. In this study, photoluminescence spectra analysis showed that by narrowing the bandgap, incorporating CDCA as a co-adsorbent in natural dye could generate a significant photocurrent. The overall power conversion efficiency was enhanced by 4.6...
Boiling heat transfer characteristics of graphene oxide nanoplatelets nano-suspensions of water-perfluorohexane (C6F14) and water-n-pentane
Alexandria Engineering Journal
Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk
Powder Technology
Operation analysis, response and performance evaluation of a pulsating heat pipe for low temperature heat recovery
Energy Conversion and Management
Optoelectronic properties of electron beam-deposited NiOx thin films for solar cell application
Results in Physics
Profit and efficiency boost of triangular vortex-generators by novel techniques
International Journal of Heat and Mass Transfer
Journal of Marine Science and Engineering
Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two si... more Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two side-by-side cylinders, were computationally investigated to determine optimal location for wake-excited energy harvesters. In the present study, the cylinders of equal diameter D were fixed at center-to-center gap ratio of T / D = 1 . 7 and immersed in sub-critical flow of Reynold number R e D = 10 , 000 . A three-dimensional Navier–Stokes flow solver in an Arbitrary Lagrangian–Eulerian (ALE) description was closely coupled to a non-linear finite element structural solver that was used to model the dynamics of a composite piezoelectric plate. The cantilever plate was fixed at several positions between 0 . 5 < x / D < 1 . 5 and - 0 . 85 < y / D < 0 . 85 measured from the center gap between cylinders, and their flow-induced oscillations were compiled and analyzed. The results indicate that flexible plates located at the centerline between the cylinder pairs experience the lowest...
International Journal of Engineering Research and
Population and urbanization in the region of North African Countries (NAC) have increased quickly... more Population and urbanization in the region of North African Countries (NAC) have increased quickly, with significant improvements in living standards in the last four decades. The Electronic Waste (EW) increases significantly in this fortune. This paper reviews the current NAC drill of EW product management including quantities of EW generation, disposal, and reuse/recycling practices; EW generation forecasts up to 2035, based on two scenarios: low and high; and discusses the long-run potential for EW in the NAC region. The assessment demonstrates that the entire low, high EW generation will be around 1982 and 3568 in 2035. The findings showed that to tackle future environmental concerns and optimize the economic opportunity inherent in EW the EW management laws in the NAC field need to be thoroughly assessed.
Experimental Study of Solar Based Refrigerator Using Thermoelectric Effect
Energy Procedia
A review on aerodynamics and hydrodynamics in sports
Energy Procedia
Effect of Various Deflectors on Drag Reduction for Trucks
Energy Procedia
Experimental study of aerodynamic behaviour of stretchable sport fabrics
Effects of Vehicle Add-Ons on Aerodynamic Performance
ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle ra... more ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle rack, advertising signboard, police and ambulance siren, portable ladder and taxi signs for commercial and professional reasons. As over 80% of the required total vehicle power is essential to overcome the aerodynamic resistance (and the remaining power is used for rolling resistance), any add-ons causes extra drag to the total system hence the extra fuel cost. The primary objectives of this study were to experimentally measure the aerodynamic drag generated by various vehicle add-ons under a range of vehicle operating speeds. The study was conducted using a reduced scale (25%) detailed model of a production large family size passenger car manufactured in Australia. The aerodynamic drag coefficient was related to fuel consumption and a detailed analysis of fuel savings was performed.
Comparative aerodynamic analysis of commercial swimsuits
Sports Technology, 2012
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Aerodynamic behaviour of stretchable sports fabrics
Sports Technology, 2011
Aerodynamics of ski jumping suits
Sports Technology, 2011
Comparative aerodynamic analysis of commercial swimsuits
Sports Technology, 2010
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Hydrodynamics of swimsuits
Assessment of Wind Characteristics and Electricity Generation Potential for Yanbu, Saudi Arabia
ABSTRACT The analysis of recently collected wind speed data is presented for Yanbu (24°05′N 38°00... more ABSTRACT The analysis of recently collected wind speed data is presented for Yanbu (24°05′N 38°00′E), located at the west coast of Saudi Arabia. With an average wind speed of 5.3 m/s at a height of 40m, the average wind speed varies from a minimum value of 4.44m/s in October to a maximum value of 6.14 m/s in June. Wind characteristics and electricity generation potential have been assessed using a web tool, „Wind Energy Assessment (WEA)Tool‟. Weibull parameters, namely, Shape factor, k and Scale factor, c have been calculated using both Graphical method and Standard Deviation method for 12 months, May‟11–April‟12.Along with the assessment of the wind energy density, the energy generation potential by Polaris P-21 wind turbine with rated power of 100 kW have been assessed using Weibull based approach and Rayleigh based approach. Total annual energy output of 154 MWh, 308 MWh, 170 MWh by this wind turbine have been estimated using Graphical method, Standard Deviation method and Rayleigh based approach, respectively. The cost of electricity have been calculated as US$ 0.097/kWh, US$0.048/kWh and US$ 0.088/kWh for capacity factors of 17.5%,35.2% and 19.5% estimated using three different statistical models, respectively considering the turbine cost of US$ 160,000 and rate of return of 5%
A comparative study of golf ball aerodynamics
Effect of Chenodeoxycholic Acid on the Performance of Dye-sensitized Solar Cells utilizing Pinang Palm (Areca catechu) Dye
Sains Malaysiana
This study examined and described the optical and photovoltaic (PV) characterizations of the Frui... more This study examined and described the optical and photovoltaic (PV) characterizations of the Fruit Areca catechu (pinang) as a new type of organic sensitizer. Recent reports stated that including chenodeoxycholic acid (CDCA) in the dye improves the performance of dye-sensitized solar cells (DSSCs). The effectiveness of PV dye was investigated by applying it in a DSSC. The absorption spectra indicated that natural dyes with CDCA has an excellent stabilizing ability. The Fourier-transform infrared spectra indicated the existence of carboxylic and hydroxyl functional groups in the naturally extracted dye. These functional groups were responsible for the rapid electron transfer and strong electronic linkages of interactions within the TiO2 surface. In this study, photoluminescence spectra analysis showed that by narrowing the bandgap, incorporating CDCA as a co-adsorbent in natural dye could generate a significant photocurrent. The overall power conversion efficiency was enhanced by 4.6...
Boiling heat transfer characteristics of graphene oxide nanoplatelets nano-suspensions of water-perfluorohexane (C6F14) and water-n-pentane
Alexandria Engineering Journal
Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk
Powder Technology
Operation analysis, response and performance evaluation of a pulsating heat pipe for low temperature heat recovery
Energy Conversion and Management
Optoelectronic properties of electron beam-deposited NiOx thin films for solar cell application
Results in Physics
Profit and efficiency boost of triangular vortex-generators by novel techniques
International Journal of Heat and Mass Transfer
Journal of Marine Science and Engineering
Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two si... more Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two side-by-side cylinders, were computationally investigated to determine optimal location for wake-excited energy harvesters. In the present study, the cylinders of equal diameter D were fixed at center-to-center gap ratio of T / D = 1 . 7 and immersed in sub-critical flow of Reynold number R e D = 10 , 000 . A three-dimensional Navier–Stokes flow solver in an Arbitrary Lagrangian–Eulerian (ALE) description was closely coupled to a non-linear finite element structural solver that was used to model the dynamics of a composite piezoelectric plate. The cantilever plate was fixed at several positions between 0 . 5 < x / D < 1 . 5 and - 0 . 85 < y / D < 0 . 85 measured from the center gap between cylinders, and their flow-induced oscillations were compiled and analyzed. The results indicate that flexible plates located at the centerline between the cylinder pairs experience the lowest...
International Journal of Engineering Research and
Population and urbanization in the region of North African Countries (NAC) have increased quickly... more Population and urbanization in the region of North African Countries (NAC) have increased quickly, with significant improvements in living standards in the last four decades. The Electronic Waste (EW) increases significantly in this fortune. This paper reviews the current NAC drill of EW product management including quantities of EW generation, disposal, and reuse/recycling practices; EW generation forecasts up to 2035, based on two scenarios: low and high; and discusses the long-run potential for EW in the NAC region. The assessment demonstrates that the entire low, high EW generation will be around 1982 and 3568 in 2035. The findings showed that to tackle future environmental concerns and optimize the economic opportunity inherent in EW the EW management laws in the NAC field need to be thoroughly assessed.
Experimental Study of Solar Based Refrigerator Using Thermoelectric Effect
Energy Procedia
A review on aerodynamics and hydrodynamics in sports
Energy Procedia
Effect of Various Deflectors on Drag Reduction for Trucks
Energy Procedia
Experimental study of aerodynamic behaviour of stretchable sport fabrics
Effects of Vehicle Add-Ons on Aerodynamic Performance
ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle ra... more ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle rack, advertising signboard, police and ambulance siren, portable ladder and taxi signs for commercial and professional reasons. As over 80% of the required total vehicle power is essential to overcome the aerodynamic resistance (and the remaining power is used for rolling resistance), any add-ons causes extra drag to the total system hence the extra fuel cost. The primary objectives of this study were to experimentally measure the aerodynamic drag generated by various vehicle add-ons under a range of vehicle operating speeds. The study was conducted using a reduced scale (25%) detailed model of a production large family size passenger car manufactured in Australia. The aerodynamic drag coefficient was related to fuel consumption and a detailed analysis of fuel savings was performed.
Comparative aerodynamic analysis of commercial swimsuits
Sports Technology, 2012
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Aerodynamic behaviour of stretchable sports fabrics
Sports Technology, 2011
Aerodynamics of ski jumping suits
Sports Technology, 2011
Comparative aerodynamic analysis of commercial swimsuits
Sports Technology, 2010
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Hydrodynamics of swimsuits
Assessment of Wind Characteristics and Electricity Generation Potential for Yanbu, Saudi Arabia
ABSTRACT The analysis of recently collected wind speed data is presented for Yanbu (24°05′N 38°00... more ABSTRACT The analysis of recently collected wind speed data is presented for Yanbu (24°05′N 38°00′E), located at the west coast of Saudi Arabia. With an average wind speed of 5.3 m/s at a height of 40m, the average wind speed varies from a minimum value of 4.44m/s in October to a maximum value of 6.14 m/s in June. Wind characteristics and electricity generation potential have been assessed using a web tool, „Wind Energy Assessment (WEA)Tool‟. Weibull parameters, namely, Shape factor, k and Scale factor, c have been calculated using both Graphical method and Standard Deviation method for 12 months, May‟11–April‟12.Along with the assessment of the wind energy density, the energy generation potential by Polaris P-21 wind turbine with rated power of 100 kW have been assessed using Weibull based approach and Rayleigh based approach. Total annual energy output of 154 MWh, 308 MWh, 170 MWh by this wind turbine have been estimated using Graphical method, Standard Deviation method and Rayleigh based approach, respectively. The cost of electricity have been calculated as US$ 0.097/kWh, US$0.048/kWh and US$ 0.088/kWh for capacity factors of 17.5%,35.2% and 19.5% estimated using three different statistical models, respectively considering the turbine cost of US$ 160,000 and rate of return of 5%
A comparative study of golf ball aerodynamics