The outlet temperature controlling tactics of condenser in evaporating stage were introduced.

Taking an air conditioning system with two identical chillers in parallel as an example, analyses the performance of the chillers under part load conditions, and points out that the cooling output of the system shall be only equally shared by the two chillers if the outlet temperature of chilled water is not reset, and that a master-slave control mode can not be adopted.

Summary: This article makes use of the high accuracy water temperature data revised in the period of “the Ninth Five-Year-Plan” to make comparative studies before and after the digitization and analyze the unusual characteristics and quake reflection efficiency.