Building Energy Consumption Analysis, Energy Saving Measurements and Verification by Applying HAP Software

Tauseef Aized, Sajid Mehmood, Zahid Anwar


Energy consumption in building sector in Pakistan is almost 30 % [1] of its total energy use and it is increasing with annual growth rate of 4.7 % and 2.5 % in domestic and commercial sector respectively. Currently there is severe energy crises in Pakistan and this has adversely effected economical growth of the country. The geographical orientation of Pakistan (latitude between 24N - 35N) explains that the country remains in sunny and hot climate throughout the year. Utilization of modern energy efficient materials in existing building envelopes can help in reduction of building energy demands. In this study research effort focuses on identification of energy consumption pattern for an existing building (Lahore based) in its current and retrofitted form. A computer program (Hourly Analysis Program HAP) has been used to simulate actual operating conditions, existing cooling load of the building was estimated and possible retrofitting measures were tested in terms of their energy saving potential. Important parameters like window size, double glazing, windows orientation, and building envelop orientation, space between window frames, window frame materials, and use of shade on windows, are considered as key decision variables, these are simulated to study their effect on building energy demands. Results presented in this study suggests that significant energy saving can be obtained with slight modification in the existing building. In this study 28.6 % energy was saved by applying different retrofitting techniques.

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Ahmad, K., Badshah, S., Rafique, A. F. (2014). A simulated case study of office building in pakistan to improve the energy efficiency. International Journal of Engineering and Advanced Technology, 04(2), 7-9.

Hameed, R., Nadeem, O., Altaf, S., & Ameen, F. (2014). Improving the Energy Efficiency of Existing Commercial Buildings in Lahore Through Retrofitting Technique. Journal of Faculty of Engineering & Technology, 21(2), 95-104.

Tahsildoost, M., & Zomorodian, Z. S. (2015). Energy retrofit techniques: An experimental study of two typical school buildings in Tehran. Energy and Buildings, 104, 65-72.

Ahmad, K., Rafique, A. F., Badshah, S. (2014). Energy efficient residentail buildings in pakistan. Energy and Environment, 25, 991-1002.

Mohammed, M. A., & Budaiwi, I. M. (2013). Strategies for reducing energy consumption in a student cafeteria in a hot-humid climate: A case study. Journal of Sustainable Development of Energy, Water and Environment Systems, 1(1), 14-26.

Khan, A., Arif, S., Alamgir, K. (2012). Comparison of buildings thermal loads against building orientations for sustainable housing in pakistan. Mehran University Research Jounal of Engineering & Technology, 31, 431-436.

Khalid, S. A. (2015). Economic and Environmental benefits for adopting energy efficiency methods for a typical house in Pakistan. Technical Journal, University of Engineering and Technology (UET) Taxila, Pakistan, 20(3), 25-33.

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