The research on energy saving of air conditioning mainly base on isolated device,and air conditioning is complex system composed of multiple device, with the changes in the environment of the air conditioning system load changes, how to determine the energy consumption of different load composed air conditioning system, the lowest standard device problems such as how to run the most reasonable, rely on the existing research results cannot be effectively solve the problem of energy saving and consumption on the electricity. Air conditioning is used to complete the indoor and outdoor energy exchange. If the ratio of the device and air conditioning exchange of energy to the electricity consumption is defined as device energy efficiency and system energy efficiency, regardless of air conditioning load energy to change, can use efficiency of air conditioning, compared to judge the air-conditioning system status, and energy saving potential of the work mode and the optimal utilization efficiency and system equipment. The use of device energy efficiency and system energy efficiency of the actual operation of the air-conditioning system was analyzed, results showed that the energy efficiency in particular, the system can determine the energy efficiency air conditioning system running, energy consumption to a reasonable level and highlights the work of air-conditioning energy saving mode of operation.
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