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Call for papersThe 2026 special issue on Climate & Health is open for submissions.Learn more
Open Journal of Energy Efficiency (OJEE) is an open access journal published quarterly. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in all areas of energy efficiency. All manuscripts must be prep…
Nikos Sakkas, Evangelos Kaltsis
The assessment of an energy retrofit necessarily requires an energy measurement campaign before (base year energy consumption) and after (post retrofit energy consumption) the retrofit. Only in this way is it possible to reach a safe conclusion, on the true r…
Paul Ojeaga, Deborah Odejimi, Emmanuel George, Dominic Azuh
The increased cost of accessing energy and the effects on economic growth (GDP) across regions is one of grave concern [1]. The Cost implication of energy supply often shapes regional energy policies across the globe. This paper presents an empirical investig…
Ahmed Rebbani, Omar Bouattane, Lhoucine Bahatti, Mimoun Zazoui
This paper deals with a dynamic analysis of an optimal technique used for direct electrical energy storage, where a concept of charge transfer between different electric storage units is used. This analysis is developed to seek for efficient and real time con…
Avijit Choudhury
Conducting complete energy audit (both process and utility) of a sponge iron unit is challenging as there is no laid down procedure to audit the process side. Further, the average heat to power ratio (kW<sub>th</sub>/kW<sub>e</sub>) of sponge iron plants rang…
Melissa Matlock
GRID Alternatives, a non-profit solar contractor, installs solar electric systems for low-income families. Part of GRID Alternatives’ program is to provide solar electric systems that are designed to replace 75% of the homeowners’ electricity usage with solar…
Jay Zarnikau, Shuangshuang Zhu
When typical meteorological year (TMY) data are used as an input to simulate the energy used in a building, it is not clear which hours in the weather data file might correspond to an electric or natural gas utility’s peak demand. Yet, the determination of pe…
Sudhir Gota
Department of Energy of Philippines statistics reveal that from 2000 to 2010, the road transport fuel consumption and corresponding CO 2 emissions have grown modestly with an annual growth rate of 0.5%. This modest growth is in contrast to the rapid increase…
Esin Okay
After the implementation of Energy Efficiency Law (EEL) in Turkey, Turkish engineering firms show considerable interest in energy savings projects. There is a growing sign of an energy effi - ciency implementation in Turkey. However, energy importation costs…
Mohamed Darwish
Qatar energy consumptions are among the highest in the world, and can easily serve double the present population. Energy conservation is a must, as the energy resources are finite, and their consumptions are increasing at alarming rates. The country depends o…
Nand Kishore Gupta, Anil Kumar Sharma, Anupama Sharma
The building construction industry is a major contributor of environmental pollution, with high levels of energy consumption and greenhouse gas emissions, all of which contribute to climate change. Housing is the single largest subsector of the construction i…
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Open Journal of Energy Efficiency (OJEE) is an open access journal published quarterly. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in all areas of energy efficiency. All manuscripts must be prep… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
Authors submit their manuscript, metadata, and declarations through the portal. There is no submission fee.
The editorial office screens the manuscript for scope, completeness, and formatting before assigning a handling editor.
At least two independent reviewers evaluate the manuscript under single-blind review. Where revisions are required, authors respond point by point.
On acceptance the article processing charge is invoiced and the CC BY 4.0 copyright handover is signed.
The article is copyedited, typeset, and given a DOI, then publishes open access with a permanent link.
Manuscripts must be original and not under consideration elsewhere. Submit in Microsoft Word or LaTeX with figures at 300 dpi minimum. Structure research articles as Abstract, Introduction, Methods, Results, Discussion, and References.
Use the journal's numbered (Vancouver) reference style. Cite sources consecutively in the order they appear, and ensure every reference is complete and retrievable.
Declare all funding sources, conflicts of interest, and ethical approvals (including informed consent and animal-care statements where applicable).