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The Scientific World Journal
Volume 2014, Article ID 310539, 8 pages
Research Article

Annual Energy Usage Reduction and Cost Savings of a School: End-Use Energy Analysis

1Mechanical Engineering Faculty, Universiti Teknikal Malaysia Melaka, 76100 Melaka, Malaysia
2Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia
3School of Economy, Finance and Banking (SEFB), Universiti Utara Malaysia (UUM), 06010 Kedah, Malaysia

Received 3 July 2014; Revised 19 August 2014; Accepted 30 September 2014; Published 18 November 2014

Academic Editor: Panagiotis Nastos

Copyright © 2014 Aiman Roslizar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Buildings are among the largest consumers of energy. Part of the energy is wasted due to the habits of users and equipment conditions. A solution to this problem is efficient energy usage. To this end, an energy audit can be conducted to assess the energy efficiency. This study aims to analyze the energy usage of a primary school and identify the potential energy reductions and cost savings. A preliminary audit was conducted, and several energy conservation measures were proposed. The energy conservation measures, with reference to the MS1525:2007 standard, were modelled to identify the potential energy reduction and cost savings. It was found that the school’s usage of electricity exceeded its need, incurring an excess expenditure of RM 2947.42. From the lighting system alone, it was found that there is a potential energy reduction of 5489.06 kWh, which gives a cost saving of RM 2282.52 via the improvement of lighting system design and its operating hours. Overall, it was found that there is a potential energy reduction and cost saving of 20.7% when the energy conservation measures are earnestly implemented. The previous energy intensity of the school was found to be 50.6 kWh/m2/year, but can theoretically be reduced to 40.19 kWh/mm2/year.