对IPLV的学习和研究（1）：定义解读
Study of IPLV (Part 1): Interpretation of the definition
摘要：
通过对GB 50189—2005和GB/T 18430.1—2007的研读,探讨了我国标准中对IPLV的定义。鉴于产品标准作为设计标准的引用和约束标准，认为在研究IPLV时，将产品标准与设计标准分开讨论的研究方式是不可取的。强调了IPLV计算和检测的公式不是IPLV完整的表达式，还应受到GB/T 18430.1—2007标准中其他特定条款的约束。离开这些特定条件，IPLV计算和检测公式不能单独成立。尽管目前的IPLV指标不是评价冷水机组及其系统最完善的方法，但是在更完善的评价方法得到广泛认同之前尚无法被替代，采用COP和IPLV两个评价指标要比只采用其中任何一个要更客观，也更科学。
Abstract：
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.
Keywords:national standard, IPLV, NPLV, PLV, COP