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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…
Ashok Kumar Pandey, Ravi Prakash
Industrial sector is the largest user of energy in India and in many parts of the world. The pulp and paper industry accounted for 6% of total global industrial energy consumption, being the fourth largest energy consumer worldwide. For India, energy audit of…
John Vourdoubas
The necessity to cope with the global threats of climate change has increased our concern on the energy sources used increasing the share of renewable energies and shifting from fossil fuels to benign energy sources. European Union through various directives…
Isiaka Adeyemi Abdul-Azeez
Universities are challenged to play a leadership role in addressing unsustainable practices that are exacerbating global warming. Basically, many assessment tools have been suggested for measuring emission scenarios and achieve sustainability within universit…
Ahmed Badr Al Hashmi, Abdel Aziz Abdulla Mohamed, Zin Eddine Dadach
The main objective of this investigation is to obtain an optimum value for the flue gas recirculation ratio in a 620 MW-Natural Gas Combined Cycle (NGCC) power plant with a 100% excess air in order to have a composition of the exhaust gas suitable for an effe…
John Vourdoubas
The possibility of electrifying the transport sector in Crete, Greece has been investigated. Currently the conventional vehicles in Crete consume annually 316,872 tons of gasoline and diesel oil emitting 1,030,188 tons of CO 2 . Electrification of the transpo…
Jie-yuan Yang, Jin-ping Li, Rong Feng
A combined system of heating, power and biogas (CHPB) system has been developed and tested in a single building in MinQin County, Gansu Province, China. The proposed system satisfies the user’s demand of power, heat, and gas. The CHPB system can effectively o…
John Vourdoubas
The possibility of creating zero CO 2 emissions residential buildings due to life cycle energy use in the island of Crete, Greece has been examined. In a typical residential building located in Crete, Greece, its annual operating energy has been appraised at…
T. K. Jyothi, B. N. Varsha, S. Raghunath, K. S. Jagadish
It is well-known that a product or a system is sustainable if it is economically viable, socially acceptable and environmentally friendly. Load bearing masonry is one such example which is quite sustainable, especially if the masonry units are locally availab…
Dilawar Husain, Sarvesh Shukla, Vivek Kumar Umrao, Ravi Prakash
Various studies have confirmed that high thermal resistance in roof & wall can reduce the heat transfer load of the buildings. In this study, experimental investigation of the effects of some sustainable features (such as green roof, reflective coated roof &…
John Vourdoubas
A description and assessment of a small renewable energy community located in Crete, Greece is presented. The community included private residential and agricultural activities without any involvement of the public sector. Small-scale decentralized energy sys…
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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).