General Information
    • ISSN: 1793-821X (Print)
    • Abbreviated Title: J. Clean Energy Technol.
    • Frequency: Quarterly
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Jennifer Zeng
    • Abstracting/ Indexing: CNKIElectronic Journals Library, Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, Google Scholar, ProQuest.
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Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all the reviewers and editors, who have been working
very hard to ensure the quality of the journal. It's my honor to work with such a wonderful team.

JOCET 2016 Vol.4(5): 375-379 ISSN: 1793-821X
DOI: 10.18178/JOCET.2016.4.5.316

Buildings Sustainability: The HVAC Contribution

Manuel C. Felgueiras, Rute Santos, Luís M. Fonseca, and Nídia S. Caetano
Abstract—A very important part of the globally produced energy is consumed in buildings, being an important share frequently used in the HVAC systems. These ones are increasing both in performance and in complexity, taking advantage from the use of the recent advances in mechanical and power electronic devices, particularly in the speed variation field. However the improved efficiency only occurs while the HVAC unit is working in the conditions specified by the manufacturer, otherwise the energy consumption raises to values considerably higher than the nominal ones. The adequate maintenance enforces the system to run on its nominal performance and the contrary has undesirable impact both in the performance and in the system expected life time. Therefore, HVAC field maintenance assumes a very important role in the global building sustainability concept. This work presents some results of an incorrect use of HVAC and the associated electric energy overconsumption that can assume values 50% higher than those that occur when the installation is operated according to the adequate maintenance plan.

Index Terms—Building sustainability, electric energy, HVAC performance.

The authors are with the School of Engineering of the Polytechnic Institute of Porto, ISEP, Portugal (e-mail:,,,


Cite:Manuel C. Felgueiras, Rute Santos, Luís M. Fonseca, and Nídia S. Caetano, "Buildings Sustainability: The HVAC Contribution," Journal of Clean Energy Technologies vol. 4, no. 5, pp. 375-379, 2016.

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