Forthcoming and Online First Articles

International Journal of Renewable Energy Technology

International Journal of Renewable Energy Technology (IJRET)

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International Journal of Renewable Energy Technology (3 papers in press)

Regular Issues

  • Thermal and exergy analysis of N-semi-transparent photovoltaic thermal air collectors connected in series/parallel   Order a copy of this article
    by G.N. Tiwari, Prashant Bhardwaj, Sujata Nayak, Arvind Tiwari, V.K. Dwivedi 
    Abstract: An attempt has been made to develop a thermal model of a semi-transparent photovoltaic thermal (SPVT) air collector connected in series and parallel for a given total number of PVT air collectors. It has been observed that the temperature of outlet fluid (air) increases with the increase of the number of SPVT air collectors connected in series along with the decrease in electrical efficiency of a solar cell of PV module. In order to maximise the thermal as well as electrical output, one has to analyse the combination of SPVT air collectors (N). It has been observed that: 1) all SPVT air collectors should be connected in series based on an overall thermal energy; 2) 3-SPVT and 4-SPVT air collectors should be connected in series and parallel combination respectively for maximum overall exergy for given 12-SPVT air collectors. Further, the effect of mass flow rate and packing factor has also been studied.
    Keywords: SPVT air collectors; overall energy; series and parallel connection; and solar energy.
    DOI: 10.1504/IJRET.2022.10051513
  • Experimental analysis of biodiesel production from used cooking oil and its combustion, performance and emission analysis at different blending ratios in diesel engine   Order a copy of this article
    by Brihaspati Singh, Anmesh Kumar Srivastava, Om Prakash 
    Abstract: Energy demand is increasing rapidly, and as per forecast, this time’s important fossil energy source will end in the next 50 years. Everyone has to think of some renewable energy source to meet future energy demand. In this study, the experimental analysis of biofuel production from used cooking oil and its performance and emission analysis is done for fuel blending B00, B05, B10, and B15. The biodiesel yield is obtained 97% with 1:10 oil methanol ratio with transesterification reaction. The biofuel’s viscosity is 2.061 cp and viscosity of used cooking oil was 25.78 cp. Engine behaviour have been analysed for all fuel blending. The fuel blending B10 has shown the better engine performance among all other fuel. In the emission analysis, the fuel blending B10 shows the maximum CO2 and NOX emissions. HC emission is maximum for B15 and minimum for B05 fuel blending. Minimum CO emission found for fuel B10.
    Keywords: used cooking oil; biodiesel; combustion; performance; emission.
    DOI: 10.1504/IJRET.2022.10052736
  • Effects of airfoil thickness on the aerodynamic efficiency of a small-scale wind turbine blade   Order a copy of this article
    by Silverio Vazquez Ruiz, Hoe-Gil Lee, William Flores 
    Abstract: The airfoil thickness is investigated on its effects in efficiency and structural characteristics in a wind turbine blade. Eight single-airfoil blades are constructed based on a fixed-speed fixed-pitch design and their corresponding optimum design to accurately describe the airfoil thickness effects on the overall geometry of the blade. Based on a linear profile, the geometry of the blade is optimised with the use of the blade element momentum theory. By also obtaining the performance of the blade, this study reveals the airfoil aerodynamic characteristics in which a thinner airfoil reaches a glide ratio that is greater than its thicker counter parts, however, an unstable stall is also encountered with a thinner airfoil ultimately reducing the blades overall efficiency. A nonlinear static simulation is conducted on the blades based on extreme wind conditions revealing an increase in deflection and stress on the blades as the airfoil thickness decreases.
    Keywords: blade design; optimisation; wind turbine; airfoil thickness.