Paper Title
LCEA Application in Buildings for Energy Efficiency: A Literature Review

Abstract
Worldwide, the use of energy in buildings accounts for almost up to 40 percent of the total primary energy use both as embodied energy and in the form of operational energy. The building sector constantly seeks to reduce energy consumption to lower the amount of C02 emissions associated with buildings. Life Cycle Energy Analysis (LCEA) is an approach that accounts for all energy inputs to a building in its lifecycle and plays an important role in reducing the negative environmental impacts caused by the human activities. This study aims at review of available literature on application of Life Cycle Energy Analysis (LCEA) in buildings for energy efficiency.It is concluded that operating energy has major share in life cycle energy use of buildings followed by embodied energy, whereas demolition and other process energy has negligible or little share.It is further observed that a low energy building performs better than self-sufficient building in life cycle context due to the use of lesser amount of embodied energy in the former comparing to the later one.