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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…
María Belén Salvetti, Jorge Czajkowski, Analía Fernanda Gómez
In this work we make a comparative study of the energy behaviour in different building types. We analyze three cases of office buildings and three residential buildings, and compare them with a previous sample. We seek to find correlations or differences in b…
Rajesh Kumar, Arun Agarwala
An enhanced energy efficiency scheme, “Perform, Achieve and Trade” (PAT) is explored in relation to the existing carbon market in India, particularly the Clean Development Mechanism, Renewable Energy Certification and possible Nationally Appropriate Mitigatio…
Jarman T. Jarman, Essam E. Khalil, Elsayed Khalaf
The recent energy crisis and environmental burden are becoming increasingly urgent and drawing enormous attention to solar-energy utilization. Direct solar thermal power generation technologies, such as, thermoelectric, thermionic, magneto hydrodynamic, and a…
Mala Abba-Aji, Vincent Ogwagwu, Bukar Umar Musa
This study analyzes the sensitivity analysis using shadow price of plastic products. This is based on a research carried out to study optimization problem of BOPLAS, a plastic industry in Maiduguri, North eastern Nigeria. Simplex method of Linear programming…
Mohammad Malekizadeh, M. F. M. Zain, Amiruddin Ismail, Ahmad Hami
Urban area consumes about main percentage of used energy. Cities need basic review in land management, structure and form to minimize the use of energy which creating environmental pollution. Urban planner s and designer s are looking for a solution and essen…
Ellene Kebede, Gbenga Ojumu, Edinam Adozsii
Alabama imports coal from other states to generate electricity. This paper assessed the direct and indirect economic impacts of wood pellet production to be co-fired with coal for power generation in Alabama. Four sizes of wood pellet plants and regional inpu…
Xiaoyi He, Xunmin Ou, Xiliang Zhang, Xu Zhang, Qian Zhang
Energy consumption for transport purposes has increased rapidly in China over the past decade. China’s transport industry has undergone remarkable developments in energy conservation through structural, technological and managerial measures. The paper analyze…
Satoru Okamoto
This paper describes two case studies: 1) a cogeneration system of a hospital and 2) a heat pump system installed in an aquarium that uses seawater for latent heat storage . The cogeneration system is an autonomous system that combines the generation of elect…
Nelson Fumo, Roy Crawford
Residential energy-efficiency measures, besides energy savings, provide opportunities for improvement of thermal comfort, air quality, lighting quality, and operation. However, all these benefits sometimes are not enough to convince a homeowner to pay the inc…
Satoru Okamoto
A ceramic gas turbine can save energy because of its high thermal efficiency at high turbine inlet temperatures. This paper deals with the thermodynamic and economic aspects of a ceramic gas turbine cogeneration system. Here cogeneration means the simultaneou…
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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).