Nowadays, the power load has been well increased and the differences between the crest and the valley of the load has become larger and larger. At the same time, the central air conditioning system plays a more important role in modern life and it has the potential to change these differences. In this paper, in view of a building’s central air conditioning system, central air conditioning system’s power load unload model have been built. A method of calculation of the ability of central air conditioning to unload the load which is based on comfort has been proposed. And it uses the enumeration method for solving optimization of the unloading. Via this research, we can figure out how much load can be unloaded to ease the crest and the valley of the load. And how can we minimize the loss of comfort can also be published.
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