在本研究中，我们开发、测试并演示了软件HVAC Cx（NIST和CSTB 2014）的最新扩展，该软件是一种自动调试工具，用于检测冷冻水分配系统（回路）中的常见机械故障和控制错误。调试过程可以提高乘员舒适度，确保系统持续正确运行，并降低能耗。自动化工具通过减少执行必要的质量保证措施所需的时间和技能水平来支持这一过程，因此，它们能够对建筑供暖、通风和空调（HVAC）系统进行更彻底的测试。本文描述了由美国国家标准与技术研究所（NIST）开发的算法，该算法用于分析冷冻水回路，并给出了使用BACnet®（ASHRAE 2016）控制器获得的现场数据进行被动监测调查的结果，并对调查结果进行了现场验证。 该工具在其第一次现场实施中成功地检测到了系统运行中的故障，通过性能监测支持了调查阶段。研究结果导致现场全面投入使用。引文:ASHRAE Transactions，第123卷，pt。2.

In this research we develop, test, and demonstrate the newest extension of the software HVAC-Cx (NIST and CSTB 2014), an automated commissioning tool for detecting common mechanical faults and control errors in chilled-water distribution systems (loops). The commissioning process can improve occupant comfort, ensure the persistence of correct system operation, and reduce energy consumption. Automated tools support the process by decreasing the time and the skill level required to carry out necessary quality assurance measures, and as a result they enable more thorough testing of building heating, ventilating, and air-conditioning (HVAC) systems. This paper describes the algorithm, developed by National Institute of Standards and Technology (NIST), to analyze chilled-water loops and presents the results of a passive monitoring investigation using field data obtained from BACnet® (ASHRAE 2016) controllers and presents field validation of the findings. The tool was successful in detecting faults in system operation in its first field implementation supporting the investigation phase through performance monitoring. Its findings led to a full energy retrocommissioning of the field site.