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

Authors

  • Tauseef Aized Mechanical Engineering Department; UET, Lahore
  • Sajid Mehmood
  • Zahid Anwar

Abstract

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.

References

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Published

2017-08-21

Issue

Section

Mechanical Engineering, Automotive, Mechatronics, Textile, Industrial and Manufacturing Engineering