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Application of Gas Condensing Boilers in Domestic Heating

机译:气体冷凝锅炉在国内供暖中的应用

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A growing number of households have had condensing boilers built in to be used for the heating of spaces and for the hot water supply. The use of condensing boilers is justified from the point of view of energy because they achieve higher thermal efficiency than traditional boilers. Condensation of water vapour occurs in the flue gases, whereby the heat released by condensation is used to heat the water in the boiler. How much water vapour will condense depends on the temperature to which the flue gases are cooled. In this paper, a thermodynamic analysis of thirteen built-in gas condensing boilers was performed; data on the flue gas composition and temperature, as well as on the excess air required for combustion were obtained for that purpose. The calculation results consisting of the amount of condensed water, the thermal efficiency of the boiler, and the volume flow rates of the air and fuel are presented in tables. The analysis identified the cases in which the water vapour condensation occurred and determined the amount of the condensed water. The cases without water vapour condensation were also identified.
机译:越来越多的家庭拥有凝结锅炉,用于加热空间和热水供应。从能量的角度来看,使用冷凝锅炉是合理的,因为它们比传统锅炉达到更高的热效率。水蒸气的冷凝发生在烟道气中,由此通过冷凝释放的热量用于加热锅炉中的水。浓缩的水蒸气依赖于烟道气被冷却的温度。在本文中,进行了十三个内置气体冷凝锅炉的热力学分析;为此目的获得了烟道气组合物和温度以及燃烧所需的过量空气的数据。在表格中介绍了由冷凝水的量,锅炉的热效率和空气和燃料的体积流速组成的计算结果。该分析确定了发生水蒸气冷凝并确定冷凝水的量的病例。还鉴定了没有水蒸气缩合的情况。

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