by Deewakar Poudel  , Benjamin Belfore  , Shankar Karki  , Grace Rajan  , Sina Soltanmohammad  , Angus Rockett  and Sylvain Marsillac

Received: 28 October 2020;  Published: 06 January 2021;  doi: 10.21926/jept.2101001

The effect of water ingress on the surface of the buffer layer of a Cu(In, Ga)Se₂ (CIGS) solar cell was studied. Such degradation can occur either during the fabrication process, if it involves a chemical bath as is often the case for CdS, or while the modules are in the field [...]

by Wisut Chamsa-ard  , Derek Fawcett  , Chun Che Fung  and Gerrard Poinern

Received: 28 September 2020;  Published: 29 December 2020;  doi: 10.21926/jept.2004018

The demand for high-quality freshwater is increasing due to global population growth, intensifying agricultural practices and expanding industrial development. Additionally, many global regions have low levels of rainfall which makes them arid and incapable of supporting large human populations or a [...]

by Samuel Cruz-Manzo

Received: 31 July 2020;  Published: 24 November 2020;  doi: 10.21926/jept.2004017

In this study, uncertainties during the assessment of the electrochemical impedance spectrum of the polymer electrolyte fuel cell (PEFC) attributed to inductive artefacts at high frequencies and inductive loops at low frequencies as well as oxygen diffusion time constant are discussed. A validated i [...]

by Katarzyna Grubel  , Ji Su  , Jotheeswari Kothandaraman  , Kriston Brooks  , Gabor A. Somorjai  and Tom Autrey

Received: 01 September 2020;  Published: 23 November 2020;  doi: 10.21926/jept.2004016

In this perspective on hydrogen carriers, we focus on the needs for the development of robust active catalysts for the release of H2 from aqueous formate solutions, which are non-flammable, non-toxic, thermally stable, and readily available at large scales at reasonable cost. Formate salts can be st [...]

by Jacob Ladenburg

Received: 28 April 2020;  Published: 12 August 2020;  doi: 10.21926/jept.2003015

Visual external costs are significant elements in the cost-benefit analysis of wind farm locations. This has been demonstrated well in the literature. However, in the assessment of the visual costs, a large share of the earlier studies used no or only simplistic visualizations of the visual impacts [...]

by Mohammad Jafari  and Zahra Malekjamshidi

Received: 13 June 2020;  Published: 05 August 2020;  doi: 10.21926/jept.2003014

In this paper, a topology of a residential hybrid renewable energy system based on a high-frequency multi-winding transformer is introduced and analyzed. The system includes a PV and a wind-turbine as renewable energy sources, a battery as energy storage and their energies are integrated through a h [...]

by Najmul Hoque  , Wahidul Biswas  , Ilyas Mazhar  and Ian Howard

Received: 29 June 2020;  Published: 31 July 2020;  doi: 10.21926/jept.2003013

Hydrogen is regarded as a potential solution to address future energy demands and environmental protection challenges. This study assesses the triple bottom line (TBL) sustainability performance of hydrogen as an automotive fuel for Western Australia (WA) using a life cycle approach. Hydrogen is con [...]

by Peter Leary  , Peter Malin  , Graeme Saunders  and Charles Sicking

Received: 03 December 2019;  Published: 29 July 2020;  doi: 10.21926/jept.2003012

A core feature of convective geothermal resource production is wellbore energy flow Q ~ ρC x T x V. E.g., for wellbore fluid of volume heat capacity ρC ~ 4.3MJ/m³∙^oC, temperature T ~ 230^oC, and volumetric flow V ~ 50L/s, wellbore h [...]

by Kosmas A. Kavadias  and Stefanos Tzelepis

Received: 03 June 2020;  Published: 24 July 2020;  doi: 10.21926/jept.2003011

The fluctuations in the cost of energy coupled with the gradual decrease in natural resources (i.e., oil, natural gas, coal) and the environmental issues caused by the extensive use of fossil fuels, demand the urgent need for the development of advanced and clean energy systems. The European Union h [...]

by Ryan J. Clarke  and David A. Miller

Received: 15 April 2020;  Published: 09 June 2020;  doi: 10.21926/jept.2002010

As wind turbine blades grow longer, new design parameters gain additional importance such as blade weight, tip deflection and material cost. These parameters require designers to relook at carbon fiber as a potential design solution. However, the composite materials in wind turbine blades are subjec [...]