1.4.3. Energy analysis according to the project life cycle
life cycle energy analysis (Life cycle energy analysis - LCEA) is a basic form of life-cycle assessment (LCA) and something special is in the analysis of energy in life cycle of construction works is very interesting to work towards using energy in the past few decades due to the construction industry is the sector of energy use very large (approximately 40% of total energy consumption of the economy national economy). LCA is part of the ISO 14 000 - Standards for Environmental Management and was included in the group with ISO 14 040.
Aspects of energy use is not the only aspect of environmental impact . However, the purpose of LCEA is not to replace a method of evaluation of environmental aspects in a broader scope, such as LCA, which is to create more favorable conditions for making decisions related to energy efficiency measure. For example, compare the energy contained (Embodied energy) of a building and its operational energy can indicate strategies for energy efficiency project life cycle and energy conservation strategies potential. Similarly, the concept of assessment over the life energy (LCEA) can be used to demonstrate the benefits over the life of the strategy is designed to optimize the operation of energy or energy content of a building contains. For example, thermal insulation solutions have contained energy costs energy to make high insulation - but save energy during operation over the life. LCEA can be used to estimate the net savings for the lifetime of the building, and perhaps more importantly, the "energy payback" is the appropriate time to operators to contain energy costs the original is returned by energy saving continuous operation accumulation [17].
the main benefit of the proposed LCEA approach to calculating the cost of energy products, design changes and war strategies used to optimize the operation of energy can be evaluated. Energy in the energy life cycle includes the original buildings and recurrence, energy shown throughout its expected lifetime (see Figure 1-7, the source [18]).
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