1 Energy Management OMID M. ROUHANI 1* AND ARASH BEHESHTIAN 1 ABSTRACT Energy management is vitally important to address severe energy problems and to reduce the consumption of scarce and valuable resources. The saved amount of energy obtained from energy management activities is proven to be the most economical source of “new” energy. The saved energy not only eases the strain on environment, but also provides time to develop new energy sources. This chapter reviews the fundamental objectives and directive principles of energy management and the major techniques and policy tools proven effective to achieve these objectives. Although the primary goal of energy management programs is profit optimization or cost minimization, these programs also aims at reducing energy consumption, at conserving non-renewable resources and at mitigating greenhouse gas emissions. To pursue these objectives, policy makers at broader levels and facility managers at narrower levels should develop effective monitoring/reporting strategies, evaluation techniques and regulations to accomplish such savings. This chapter provides an overview of the state of the art practices for a vast variety of energy management–related topics including economic evaluation techniques, greenhouse gas emissions management, energy labeling, renewable resources and distributed generation. The concluding section provides a review of world-wide energy management policies and regulations employed in different energy sectors. Key words: Energy management, Economic analysis, Renewable resources, GHG emissions, Distributed generation. 1 School of Civil and Environmental Engineering, Hollister Hall, Cornell University, Ithaca, NY, 14853, USA. *Corresponding author: E-mail: om67@cornell.edu