对使用燃气热水器的组合（组合）加热系统在典型运行年份可能经历的风扇/泵循环次数、燃烧器/燃气阀循环次数以及燃烧器运行小时数进行了分析。根据气候、设备尺寸比和热水使用率的合理范围确定循环特性。气候数据代表了美国能源部（DOE）的六个加热区域，用于评估电器的加热性能。利用类似于用于评估熔炉或热泵性能的料仓计算方法，对多种变量的组合加热系统循环特性进行了预测。对这些运行参数的了解将使设计和安装组合系统的人员对系统和组件循环特性有重要的了解。 关键词:循环、性能、部件、燃气锅炉、组合锅炉、锅炉、空间供暖、燃气、热水器、操作、气候、性能、电器、热泵。引用:研讨会，ASHRAE Trans。1994年，第100卷，第一部分

An analysis has been made to predict the number of fan/pump cycles, the number of burner/gas-valve cycles, and the burner operating hours that combination (combo) heating systems utilising a gas-fired water heater may experience in a typical year of operation. The cycling characteristics were determined for reasonable ranges of climates, equipment sizing ratios, and hot water usage rates. The climatic data represented the six heating regions of the US Department of Energy (DOE) that are used for rating the heating performance of appliances. The combination heating system cycling characteristics were predicted for a wide range of variables utilising a bin calculation method similar to that used for evaluating furnace or heat pump performance. An understanding of these operating parameters will give those who design and install combo systems important insights into system and component cycling characteristics.KEYWORDS: cyclic, properties, components, gas fired boilers, combination boilers, boilers, space heating, gas fired, water heaters, operations, climate, performance, appliances, heat pumps.