The paper states equipment performances,of three level the electrical wiring carries on the elaboration,and its load efficiency,According to the analysis result,it proposes the improvement method.

Through a compression refrigeration and heat transfer analysis, evaluates the drop in full load efficiency of water cooled liquid chillers from that according to the ARI standard, and concludes that the chiller selected in China should meet the local weather and water quality requirements to ensure the chillers long term operating efficiency and reliabi.

Quantitative analysis between load factor and coal consumption of electricity supply;