Energy-saving rate testing method and system for energy-saving transformation of central air-conditioning system

Abstract

The invention relates to an energy-saving rate testing method and system for energy-saving transformation of a central air-conditioning system. The energy-saving rate testing method is characterized in that two adjacent days are selected as a group of comparison testing time periods, testing of the energy consumption and refrigerating capacity of the central air-conditioning system in a non-energy-saving state and the temperature and humidity of the environment on the first day is carried out, testing of the energy consumption and refrigerating capacity of the central air-conditioning systemin an energy-saving state and the temperature and humidity of the environment on the next day is carried out, more than three groups of comparison test data in the non-energy-saving state and the energy-saving state are selected, the fact that the weather conditions of two adjacent days of each group of comparison data are the same in the test time period is ensured, the refrigerating capacity ofunit energy consumption in the non-energy-saving state and the refrigerating capacity of unit energy consumption in the energy-saving state are compared through analyzing of more than three groups ofeffective test data obtained through calculation, and the energy-saving rate is calculated by dividing the energy consumption difference between the non-energy-saving state and the energy-saving stateby the energy consumption in the non-energy-saving state. The system comprises a data center, an electric parameter recorder, a cooling capacity recorder and a temperature and humidity recorder. According to the energy-saving rate testing method and system for energy-saving transformation of the central air-conditioning system, synchronous acquisition, transmission and processing of the energy efficiency data of the central air-conditioning system can be realized.

Description

technical field [0001] The invention relates to the technical field of air-conditioning energy-saving measurement, in particular to an energy-saving rate testing method and system for energy-saving transformation of a central air-conditioning system. Background technique [0002] At present, building energy consumption is about 30% of the total energy consumption of the society. In our country there are nearly 40 billion m 2 Among the buildings, 99% of them are high-energy buildings, and more than 95% of new buildings are also high-energy buildings. The area of ​​office buildings and large public buildings in our country is less than 4% of the total construction area of ​​cities and towns in the country, but the annual electricity consumption accounts for 22% of the total electricity consumption in cities and towns in the country, and the annual electricity consumption per unit area is as high as 10-10% of that of ordinary residential buildings. 20 times. On the other han...

AI Technical Summary

Problems solved by technology

The existing energy-saving rate test method only uses the difference of power or electric energy before and after the transformation to judge the energy-saving energy. Whether the transformation is effective or not, the energy-saving transformation cannot be judged by simply reducing the energy consumption of the central air-conditioning system, but ignores the cooling effect of the central air-conditioning system before and after the transformation. This simple evaluation will lead to the energy-saving transformation of the central air-conditioning system only reducing the total system Energy consumption, but the central air conditioner loses its basic function of cooling or heating

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