by Simon Calles  , Paul Heitjans  and Alexander Börger

Received: 09 November 2021;  Published: 18 April 2022;  doi: 10.21926/jept.2202015

Prismatic PHEV2 form-factor lithium-ion cells with a nominal capacity of 25 Ah (as used for automotive applications) have been studied with electrochemical impedance spectroscopy (EIS). The data was evaluated using electrical equivalent circuits. Mathematical modeling, system identification, and the determination of model parameters of the lithium-ion cell were also carried out. While a study of the influence of temperature and state-of-charge (SOC) performed using pristine lithium-ion cells showed a nonlinear rela [...]

by Meenal Jain  , Meenakshi Mital  and Matt Syal

Received: 21 November 2021;  Published: 14 April 2022;  doi: 10.21926/jept.2202014

India is a rapidly developing nation and is heavily dependent on fossil fuels. Renewable energy presents an attractive solution to the growing challenges concerning energy needs. Solar energy is abundant in India, and thus, its application and use are rapidly advancing. This study assesses various government initiatives for off-grid Solar Photovoltaic/Solar Water Heating systems for commercial establishments in India and elucidates the need for improvements in their implementation, highlighting the problems in avai [...]

by Hossein Akbari  , Seyed Mojtaba Hosseinnia  , Mikhail Sorin  , Christopher Reddick  and Dominic Laperle

Received: 13 January 2022;  Published: 12 April 2022;  doi: 10.21926/jept.2202013

Heat integration techniques such as pinch analysis can play a significant role in saving energy in the design of buildings. The application of pinch analysis in this sector encounters difficulties due to the highly time-dependent behavior of energy streams such as waste heat and solar thermal collectors, as well as the possible need for heat storage units (HSUs). The existing pinch models in the literature either bear little relation to reality because they ignore the time dependency of the streams, or they do not [...]

by Lotta Lounasmeri

Received: 26 November 2021;  Published: 06 April 2022;  doi: 10.21926/jept.2202012

This paper examines the building of a new nuclear plant as a greenfield operation in Pyhäjoki, Finland. A newly-founded energy company, Fennovoima, was granted a license by the Finnish parliament to build a new power plant in 2010. In the years following this Decision in Principle the project faced several obstacles. Through interviews with key actors, this paper identifies the interests and core beliefs associated with building the plant. It posits that, in Finland, the underlying ideas and values surrounding nucl [...]

by Arnold Hendharto Widdhiarta  , Yousuke Shimaura  , Ichiro Nagai  , Takayuki Shibata  and Yutaka Moritomo

Received: 15 February 2022;  Published: 30 March 2022;  doi: 10.21926/jept.2201011

We fabricated three thermo-rechargeable batteries using low-cost transition metal hexacyanoferrate and determined the thermal voltage (Vcell) and discharge capacity (Qcell) per unit weight of the total active material in the cathode and anode. The obtained values were compared with the calculated values, which were determined by analyzing the temperature and capacity coefficients of the redox potential.

by Zhen Liu  , Li Yang  , Abhishek Lahiri  , James F Rohan  and Frank Endres

Received: 26 December 2021;  Published: 27 March 2022;  doi: 10.21926/jept.2201010

Herein, we report the coating of nanostructured germanium using a polypyrrole (PPy) polymer coat as a composite anode material for the fabrication of lithium-ion batteries. The Ge/PPy composites were synthesized following the direct electrochemical deposition method in an ionic liquid (IL). The results revealed that the coating of PPy on Ge helped realize stable battery cycling and reversible capacities, which were not observed in uncoated Ge. The PPy layers could effectively inhibit side reactions between the elec [...]

by Syuma Ichida  , Daisuke Mori  , Sou Taminato  , Tao Zhang  , Yasuo Takeda  , Osamu Yamamoto  and Nobuyuki Imanishi

Received: 17 February 2022;  Published: 15 March 2022;  doi: 10.21926/jept.2201009

Acidic aqueous lithium-air batteries are attractive candidates for use as energy sources in electric vehicles because of their high energy and power densities and ability to operate under ambient conditions. An aqueous lithium-air battery with an acetic acid catholyte has a high theoretical energy density of 1,478 Wh kg-1, and the reaction product is soluble in the catholyte. In this study, we have studied the cell performance of a Li/interlayer electrolyte/NASICON-type solid lithium-ion conductor/acetic acid catho [...]

by Daming Zhang

Received: 21 January 2022;  Published: 07 March 2022;  doi: 10.21926/jept.2201008

In this paper, a method for operating AC microgrids in both off-grid or standalone and grid-connected modes is proposed to minimize the use of energy storage by increasing the number of PV panels and curtailing their output power. When the intensity of daylight decreases, power is imported from the main grid through an AC/DC/AC converter or solid-state transformers in parallel to compensate for the shortage. By using a three-phase transformer in Δ-Y connection with Y’s neutral connected to its local grounding syste [...]

by Cherechi Ndukwe  , M. Tariq Iqbal  and Jahangir Khan

Received: 16 November 2021;  Published: 17 February 2022;  doi: 10.21926/jept.2201007

SCADA provides real-time system monitoring by constant communication and data exchange between various system devices to achieve data visualization and logging. Presently, in industrial systems, commercial SCADA systems are being used for data monitoring and control. These systems can be expensive, and as such can only be afforded by select industries. Even at these costs, the commercial SCADA systems face some challenges, which include interoperability and scalability issues. Research has shown that these problems [...]

by Zeel Maheshwari  and Rama Ramakumar

Received: 29 August 2021;  Published: 21 January 2022;  doi: 10.21926/jept.2201006

Rural and remote communities are more vulnerable to damage caused by extreme events as compared to urban areas. Natural disasters can disrupt basic supplies such as domestic water supply and cooking needs in addition to electricity outages. The recognition of the interlinked nature of food, water and energy has gained momentum over the past few years. Smart Integrated Renewable Energy System (SIRES) has been proposed to handle basic needs such as cooking, domestic and irrigation water supply, and electricity to rem [...]