Energy production is another way to increase the energy efficiency of energy production. Both the building and Industry. With the use of electrical energy. And the use of large air conditioning systems. System can produce electricity and heat together. Normally, the production of electricity from power plants to produce energy efficient, which is about 45-55% less electricity and cooling system and participation. Energy efficiency is as high as 80-90%. Cogeneration system. Of Government facilities. It is one of the cogeneration system. Gas turbine with electricity and heat to produce chilled water for air conditioning systems with an Absorption Chiller.