指出大多数大型燃油锅炉都配备了两级燃烧器。部分负荷控制包括在“关闭”和“低”以及“低”和“高”状态之间循环燃烧器。锅炉的尺寸通常适用于满负荷时的供水和排气温度分别为60摄氏度和80摄氏度。在部分负荷下，水排气温度可降至最低，通常在50摄氏度左右或以上。介绍了几年来获得的300多个测试和模拟结果。一些结果也取自文献。重点研究锅炉效率对水温和部分负荷的敏感性。坚持认为，利用本文给出的结果，可以对任何工况下的燃油锅炉效率做出相当准确的估计。 根据可用信息，详细说明了几种可能的近似值。关键词:锅炉，试验，模型，计算，燃油锅炉，效率，水温，部分负荷。引用:研讨会，ASHRAE Trans。，1993年，第99卷，第2部分，论文编号DE-93-1-1429-439，图7，表2，参考文献。

States that most large fuel oil boilers are equipped with two-stage burners. Part-load control consists in cycling the burner between 'off' and 'low' and between 'low' and 'high' regimes. Boilers are usually sized for water supply and exhaust temperatures of 60degC and 80degC respectively, in full load. In part load, the water exhaust temperature can be reduced to a minimum, which is usually around or above 50degC. Describes the results of more than 300 test and simulation results obtained over several years. A few results are also taken from the literature. Focuses on the sensitivity of boiler efficiency to water temperature and part load. Maintains that with the results presented in this paper, it is possible to make a fairly accurate estimate of fuel oil boiler efficiency in any regime. Details several levels of approximations which are possible according to the information available.KEYWORDS: Boilers, testing, models, calculating, oil fired boilers, efficiency, water temperature, part load.