As we all know that hotels have high requirements on energy-saving, mature successful experience in the industry and stable performance of the products. Midea design was the combination of high efficiency centrifugal chiller and inverter direct-drive centrifugal chiller. Total capacity was 1,900RT. Midea inverter direct-drive centrifugal chiller has less refrigerant charge and lower noise, COP is up to 6.4. The efficiency is 6% higher than single stage with standard economizer design. The noise can be lower to 75-80dB(A).