【正文】
n we arrive home from work. The Central plant and Mixed Use Standard energy delivery systems have bee antiquated and grossly inefficient Conventional thermoelectric stations convert only about 30% of the fuel energy into electricity. The remaining 70% is lost into electricity. The remaining 70 % is lost in the form of waste heat. Moving energy production to a central plant within the building stars to reduce these inefficiencies. Adding trigeneration technology that provides simultaneous production of power heat and cooling from a single energy source yields additional savings .waste heat from energy production is recover and used for free domestic hot water and space heating ,or in warmer climates waste heat can be run through heat absorption chillers for supplemental cooling. Maximum reuse of waste energy depends on the building use. The typical tall building often function as a monouse tower for either mercial or residential use. The single use typology has been driven for the most part by zoning and floor plates size requirements. Office floor plates are very deep to maximize structural efficiency while residential floor plates are shallower to allow for ample access to fresh air, daylight and views. With the new generation of super tower, We are now seeing multiuse programs with bined mercial office and residential ponents. The bottom third may contain offices, followed by condominiums, then topped with a hotel. While this can be a design challenge, the