Abstract
The Importance of LCEM (Life Cycle Energy Management) has been recognized from the view of life cycle energy saving of sustainable buildings. The purposes of this research are proposal of flame work of LCEM and development of prototype of HVAC system simulation tools for LCEM. In this report outline of flame work of LCEM and necessity of energy simulation tool for LCEM are discussed. And the algorithm and structure of the tool are described. In addition, one concrete example of application of simulation tool for regulation of a water supply system is shown.