|Title:||Life cycle energy analysis & cost evaluation of a hotel building|
|Subject:||Hong Kong Polytechnic University -- Dissertations|
Hotels -- Energy conservation -- China -- Hong Kong -- Evaluation
Hotels -- Energy consumption -- China -- Hong Kong -- Evaluation
Department of Building Services Engineering
|Pages:||xiii, 105,  : ill. ; 30 cm|
|Abstract:||With growing global concerns in environment protection, and buildings in Hong Kong are responsible for more than half of the total energy consumption, building professionals have prompted a search for criteria, approaches and practices for guiding environment design, construction and operation. Unfortunately, the meritorious saving of energy is affected by the cost producing the energy saving. As in most of our lives situation, choices between cost and outcome must always be balanced. This study takes into account of life cycle energy as well as life cycle cost consumed for construction and operation of a building. A 3-star hotel in Hong Kong having 10,314 sq. m gross floor area is selected for case study. In life-cycle energy analysis, focus is put on the embodied energy and operation energy, demolition energy is neglected since it is insignificant in the amount of total life cycle energy. Construction cost and electricity cost are also discussed in depth in life-cycle cost analysis as it is important to strike a right balance in face of cost saving issues. Recent global economic downturn has badly affected tourism in Hong Kong and in turn has led to difficulty in running hotel business. According to the statistic information published by Hong Kong Government, occupancy rate of hotels have further fallen down after 11 September Terrorist Attack. Hotel operators are hesitating for development, either building a new property or renovating for existing one. This study points out that this 3-star hotel development type -'Addition & Alternation' can save 48% construction cost and 60% embodied energy. Those savings mainly due to retention of existing reinforced concrete (RC) structure which represents great proportion in total amount of embodied energy and construction cost of buildings. Besides, it is also verified that operating energy represents the most significant component of life-cycle energy and far more significant than embodied energy. On the other hand, construction cost is dominant over the building life but electricity cost becomes comparable with construction cost when the building life span becomes longer and longer. According to the result, from 40 to 60-year-life span, ratio of operating energy to embodied energy increases from 93:7 to 96:4, ratio of electricity cost to construction cost increase from 40:60 to 50:50. At this time, strategies for reducing the life-cycle energy and money use should clearly progress first by introducing those design considerations and management practices they significantly reduce building operating energy for energy saving, and reduce construction cost & electricity cost for cost saving.|
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