Calculates the energy consumption and economic index of the full fresh air system and partial circulation air conditioning system.

Three design models of the cold-source of central air conditioning systems are discussed: regular water cooled chiller operation, partial cold-storage operation, and full cold-storage operation.

Then the energy calculation and analysis for two normal run modes of the Water Source Heat Pump (WSHP) residential central air-conditioning were done at the concept of partial load characteristic.