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All Journal International Journal of Renewable Energy Development Emerging Science Journal Automotive Experiences
Koten, Hasan
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Parametric Study of an Organic Rankine Cycle Using Different Fluids Touaibi, Rabah; Koten, Hasan; Boydak, Ozlem
Emerging Science Journal Vol 4, No 2 (2020): April
Publisher : Ital Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/esj-2020-01216

Abstract

This work is an energy study of an organic Rankine cycle (ORC) for the recovery of thermal energy by comparing three organic fluids. This cycle is considered to be a promising cycle for the conversion of heat into mechanical energy suitable for low temperature heat sources; it uses more volatile organic fluids than water, which generally has high molecular weights, thus allowing operating pressures at temperatures lower than those of the traditional Rankine cycle. A thermodynamic model was developed using the Engineering Equation Solver (EES) software to determine its performance using different working fluids (toluene, R245fa and R123) under the same operating conditions, taking into account the effect of certain operating parameters and the selection of organic fluids on cycle performance. The results obtained show that the toluene organic fluid has the best thermal efficiency of the cycle compared to the other fluids; 14.38% for toluene, 13.68% for R123 and 13.19 for R245fa.
Blades Optimization for Maximum Power Output of Vertical Axis Wind Turbine Shoukat, Ahmad Adnan; Noon, Adnan Aslam; Anwar, Muhammad; Ahmed, Hafiz Waqar; Khan, Talha Irfan; Koten, Hasan; Siddiqi, Muftooh Ur Rehman; Sharif, Aamer
International Journal of Renewable Energy Development Vol 10, No 3 (2021): August 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.35530

Abstract

Wind power is a significant and urging sustainable power source asset to petroleum derivatives. Wind machines, for example, H-Darrieus vertical pivot wind turbines (VAWTs) have increased much notoriety in research network throughout the most recent couple of decades because of their applications at destinations having moderately low wind speed. Be that as it may, it is noticed that such wind turbines have low effectiveness. The point of this examination is to plan rotor cutting edges which could create most extreme power yield and execution. Different plan factors, for instance, harmony length, pitch edge, rotor distance across, cutting edge length and pitch point are explored to upgrade the presentation of VAWT. Rotor cutting edges are manufactured using the NACA-0030 structure and tried in wind burrow office and contrast its outcomes and DSM 523 profile. Numerical simulations are performed to get best geometry and stream conduct for achieving greatest power. It is seen that for higher tip-speed-proportion (TSR), shorter harmony length and bigger distance across the rotor (i.e., lower robustness) yields higher effectiveness in NACA 0030. Nevertheless, for lower TSR, the more drawn out agreement length and slighter distance across rotor (i.e., higher strength) gives better implementation. The pitch point is - 2° for TSR = 3 and - 3° for TSR = 2.5. The most extreme power yield of the wind turbine is acquired for the sharp edge profile NACA 0030. Besides, instantaneous control coefficient, power coefficient (CP) is the greatest reason for azimuthal edge of 245° and least esteem for 180°.
Alternative Way to Electric Vehicle Battery Technologies as Sustainable Hydrogen Production System without Storage Vessel for Hydrogen Motors and Engine Test Köten, Hasan
Automotive Experiences Vol 8 No 1 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13209

Abstract

Although electric vehicles are becoming more widespread today, the electric batteries used as power sources still have many issues. The main problems include short driving range, long charging times, safety and security concerns, the lack of environmentally friendly electricity production, recycling challenges, high costs, and sustainability issues. In particular, lithium-based electric vehicle batteries are gradually being replaced by alternative battery technologies due to their high cost and limited availability. In this study, we introduce a novel hydrogen production method that can serve as both a fuel for internal combustion engines and an energy source through fuel cells for electric cars. Unlike conventional approaches, this method enables the on-demand production of hydrogen fuel without requiring a hydrogen storage tank, allowing direct use in engines. This study not only eliminates hydrogen storage issues but also presents a new alternative power source to lithium-ion, lithium-air, lithium polymer, magnesium-based and sodium-based electric batteries. As a result, the study describes an environmentally friendly alternative energy source for the automotive industry, a sustainable hydrogen production system, and a solution that enhances safety and security while reducing associated risks.
Co-Authors Ahmed, Hafiz Waqar Boydak, Ozlem Khan, Talha Irfan Muhammad Anwar Noon, Adnan Aslam Sharif, Aamer Shoukat, Ahmad Adnan Siddiqi, Muftooh Ur Rehman Touaibi, Rabah