Study of IPLV (Part 1): Interpretation of the definition

Studying the national standards GB 50189—2005 and GB/T 18430.1—2007, analyses the definition of IPLV in China’s current standards. Points out that since product standards are regarded as reference to and constraint of the design criteria, it is not appropriate to discuss product and design standards separately while researching IPLV standards. Emphasizes that the calculation and examination formula for IPLV is not complete one and it should also be restricted by the other special articles in GB/T 18430.1—2007. The formula cannot be independently tenable without these articles. Although the present IPLV index is less perfect for evaluating a water chiller and its system, it cannot be replaced until a bettle evaluating index is generally accepted. Adopting two evaluating indexes, COP and IPLV, is more objective and reasonable than adopting either of them.