地下车站冷水机组部分负荷性能系数研究
Study on part load value of water chillers in underground stations
摘要：
部分负荷性能系数的概念综合考虑了气象因素、实际负荷及运行条件，便于在更贴近实际使用条件下对机组进行比较、评价，有助于促进机组实际运行性能水平的提高，目前已被空调行业广泛采用。国标定义的部分负荷性能系数具有广谱性，力求覆盖全国各气候区及各种建筑类型。地铁车站应用场景下，空调负荷有其固有的特点，不宜直接采用国标定义的部分负荷性能系数定义工况点及计算方法。本文选取我国不同气候区域的代表城市，在深入研究地下车站空调负荷特点的基础上，提出适应于地下车站应用场景的部分负荷性能系数定义工况点及相应的计算方法。
Abstract：
The part load value (PLV) comprehensively considers meteorological factors, actual load, and operating conditions. This makes it convenient to compare and evaluate the units under actual conditions of use, helps to promote the actual operating performance level of the units and has been widely adopted by the air conditioning industry. The PLV defined by the national standard has a broad spectrum and aims to cover all climate zones and various building types in the country. In the application scenario of the subway station, the air conditioning load has its inherent characteristics. Therefore, it is not suitable to use the PLV points and calculation method defined and recommended by the national standard directly. This paper selects the representative cities of different climate regions in China, on the basis of an in-depth study of the characteristics of air conditioning load in underground stations, and proposes the definition of the PLV as well as corresponding calculation method for the application scenario of underground stations.
Keywords:integrated part load value (IPLV); non-standard part load value (NPLV); water chiller; underground railway; load ratio; entering condenser water temperature (ECWT)