研究了燃气热水器中不同的烟道插入件及其对烟道压降和相应的水侧总传热的影响。设计了一个冷流装置来测量压降，并可视化各种插入件的流量。这允许在实际加热器中进行测试之前，对不同插件的性能进行比较评估。然后安装浸没式燃烧室热水器，并配备选定的插件，以确定燃烧效率、压降和回收效率。随着压降（由挡板在气流中诱导的湍流引起）增加，直至开始不完全燃烧，预计装置的性能将得到改善。 收集的数据验证了冷流压降测试的预期趋势。这证实，在一定程度上，可以从冷流试验中选择最佳插入件。在不完全燃烧开始之前，回收效率随着气道压降的增加而增加。该评估程序适用于不同尺寸的强制通风装置和大气装置，为气道挡板插入件的设计和选择提供了一个有趣的新视角。单位:双引文:研讨会，ASHRAE交易，1987年，第93卷，第。田纳西州纳什维尔2号

Various flueway inserts and their effect on the pressure drop in the flueway and the corresponding total heat transfer to the water side of a gas-fired water heater were studied. A cold-flow setup was designed to measure the pressure drop and to visualize the flow for various inserts. This permitted a comparative evaluation of the performance of different inserts prior to testing in the actual heater.A submerged combustion chamber water heater was then instnlmented and equipped with selected inserts to determine combustion efficiency, pressure drop, and recovery efficiency. It was expected that the performance of the unit would improve as the pressure drop (resulting from turbulence induced in the flow by the baffle) increased up to the onset of incornplete combustion. Data collected verified the trends anticipated from the cold-flow pressure drop testing. This confirmed that, to some extent, optimum inserts could be selected from cold flow tests.The recovery efficiency was shown to increase with an increase in the flueway pressure drop up to the onset of incomplete combustion. The evaluation procedure is applicable to forced draft units and atmospheric units of different size, presenting an interesting new perspective to the design and selection of flueway baffle inserts.Units: Dual