by Elysa Nensy Irawan  , Sandro Sitompul  , Ken-Ichiro Yamashita  and Goro Fujita

Received: 05 October 2022;  Published: 02 January 2023;  doi: 10.21926/jept.2301001

This research aims to know the effect of the Rotor Radius Ratio on the performance of the hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809 model using the Computational Fluid Dynamics method. Two-bladed Savonius is used as an internal rotor, and three-bladed Darrieus NREL S809 as an external rotor. Turbine model performance is analyzed through the value of the Moment Coefficient and Power Coefficient. The result shows that the increase in the Rotor Radius Ratio value causes an increase in the initial M [...]

by Hamidreza Shamsi  , Ehsan Haghi  , Manh-Kien Tran  , Sean Walker  , Kaamran Raahemifar  and Michael Fowler

Received: 11 March 2022;  Published: 25 December 2022;  doi: 10.21926/jept.2204043

Road traffic is a significant source of air pollution that has a harmful impact on human health. To reduce the health and environmental impacts of fossil fuel consumption in the transportation sector, many countries have implemented policies to promote the deployment of electric vehicles (EVs). A vital factor to consider when designing policies to support EV use is the monetized health impacts of fossil fuel consumption. This research aims to investigate the health benefit of replacing internal combustion engine ve [...]

by Lara T. C. Mota  , Igor M. Figueredo  , F. Murilo T. Luna  , Rodrigo S. Vieira  , Célio L. Cavalcante Jr.  and M. Alexsandra S. Rios

Received: 26 September 2022;  Published: 22 December 2022;  doi: 10.21926/jept.2204042

In this study, the oxidative stability of the cottonseed oil biodiesel (CB) and soybean oil biodiesel (SB) was investigated by two methodologies, Rancimat and Differential Scanning Calorimetry (DSC), using samples fresh and aged (mid-term storage condition (100 days)). The biodiesel samples were synthesized by transesterification and characterized by specific mass, kinematic viscosity, acidity value, ester content, viscosity index, and peroxide value. The activation energy (Ea), Arrhenius pre-exponential factor (Z) [...]

by Andrew Williams  and Murray Thomson

Received: 25 September 2022;  Published: 13 December 2022;  doi: 10.21926/jept.2204041

This paper sets out a quantified scenario for the UK to reach net zero carbon emissions. Wind and solar are the main energy sources and their intermittency is accommodated through hydrogen electrolysis, biogas from anaerobic digesters, and their combination into biomethane. Hydrogen and biomethane stocks are tracked. A daily energy balance model is presented, using the most recent recorded weather data-2017 to 2021. Long periods of low wind in 2021 indicated the necessary energy storage capacities, which were adjus [...]

by Hunter Heineman  , Omran Omar  , Benjamin Rippel  , Ryan Keeley  , Michael Mehan  , Surendra Gupta  and Gerald A. Takacs

Received: 21 August 2022;  Published: 06 December 2022;  doi: 10.21926/jept.2204040

Ozone was reacted with the aromatic membrane polyetheretherketone (PEEK) to form oxidized functional groups on the surface to enhance the attraction and transport of protons in fuel cells. Ozonation of unsaturated C-C sp2 bonds in PEEK formed a primary ozonide which dissociated to primarily produce O=C-O/O=C-OH moieties, and the root mean squared roughness factor (Rq) decreased from 7.4 nm, for the untreated sample, down to 3.1 nm. The oxidation of the surface and decrease in surface roughness made the surface incr [...]

by Tanja Radu  , Vincent Smedley  , Dipti Yadav  , Richard Blanchard  , Sheik Aminur Rahaman  , P. Abdul Salam  and Chettiyappan Visvanathan

Received: 21 September 2022;  Published: 28 November 2022;  doi: 10.21926/jept.2204039

The implementation of community-level de-centralised anaerobic digestion (AD) systems offers a sustainable solution for organic waste management and energy provision, but there is currently a need for low-cost methods of system control and management at this scale. The problem becomes accentuated with increasing deployment, as greater complexities are created by the need to both monitor and control a wider network of smaller, community-scale plants. This paper describes research to design, deploy and test such a sy [...]

by Mikhail Pylnev  , Hussain Al-Alawadhi  and Nouar Tabet

Received: 21 September 2022;  Published: 25 November 2022;  doi: 10.21926/jept.2204038

The most commonly used process for fabricating perovskite solar cells is based on wet chemistry, which greatly limits the choice of materials suitable for optimizing the performance of the device. We developed a new approach for the fabrication of perovskite-based solar cells. In the smart stacking process, the perovskite solar cell was assembled by stacking two pieces of perovskite films prepared separately. A working perovskite solar cell was developed with PCE = 0.78% and the perovskite layer was analyzed with X [...]

by John Glasson  , Bridget Durning  and Kellie Welch

Received: 06 July 2022;  Published: 16 November 2022;  doi: 10.21926/jept.2204037

The article examines the nature of impacts of the rapidly growing Offshore Wind Farm (OWF) industry on tourism and recreation in coastal communities, especially in the UK. The multi-methods research approach includes reviews of literature, content of OWF Environmental Statements (ESs) for predicted impacts, recent practice for actual impacts, and the use of mitigation and enhancement measures. Findings from literature indicate that the overall impact on tourism appears relatively benign, and sometimes positive. The [...]

by Shaikha Al-Ballam  , Hamidreza Karami  and Deepak Devegowda

Received: 27 September 2022;  Published: 14 November 2022;  doi: 10.21926/jept.2204036

Electrical Submersible Pumps (ESPs) are one of the most widely used artificial lift methods in the petroleum industry. However, ESP failures are unanticipated and common occurrences with significant financial impacts for the operators. Analysis of the ESP performance and failures are essential in its design and optimization. This paper presents a statistical approach for diagnosing and evaluating the root causes of ESP failures. The analysis is based on the field data gathered from the surface and downhole ESP moni [...]

by Yash Aryan  and Anil Kumar Dikshit

Received: 26 July 2022;  Published: 09 November 2022;  doi: 10.21926/jept.2204035

Electric vehicles are becoming popular among consumers while BS-VI norms have been introduced and mandated for conventional vehicles in India. In the present study, the environmental impacts from the use phase of electric two-wheeler (EV) and gasoline two-wheeler (GV) have been evaluated and compared using the life cycle assessment (LCA) perspective. The functional unit adopted was 1000 km driven by one vehicle under Indian road and traffic conditions. CML 2001 and ReCiPe 2016 methods were used for the assessment u [...]