空气加热器和锅炉采暖系统------外文文献及译文.doc
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空气加热器和锅炉采暖系统------外文文献及译文,most u.s. homes are heated with either furnaces or boilers. furnaces heat air and distribute the heated air through the house using ducts; boilers heat water, p...
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Most U.S. homes are heated with either furnaces or boilers. Furnaces heat air and distribute the heated air through the house using ducts; boilers heat water, providing either hot water or steam for heating. Steam is distributed via pipes to steam radiators, and hot water can be distributed via baseboard radiators or radiant floor systems, or can heat air via a coil. Steam boilers operate at a higher temperature than hot water boilers, and are inherently less efficient, but high-efficiency versions of all types of furnaces and boilers are currently available.
Understanding the Efficiency Rating of Furnaces and Boilers
A central furnace or boiler's efficiency is measured by annual fuel utilization efficiency (AFUE). The Federal Trade Commission requires new furnaces or boilers to display their AFUE so consumers can compare heating efficiencies of various models. AFUE is a measure of how efficient the appliance is in the energy in its fuel over the course of a typical year.
Specifically, AFUE is the ratio of heat output of the furnace or boiler compared to the total energy consumed by a furnace or boiler. An AFUE of 90% means that 90% of the energy in the fuel becomes heat for the home and the other 10% escapes up the chimney and elsewhere. AFUE doesn't include the heat losses of the duct system or piping, which can be as much as 35% of the energy for output of the furnace when ducts are located in the attic.
大部分美国家庭都用锅炉取暖。锅炉加热空气并且把加热的气体通过管路输送到房间里。蒸汽通过管道输送到蒸汽散热器里，而热水可以通过散热器和地板辐射环路把热量传给房间。蒸汽锅炉和热水锅炉相比，它的工作温度高，热效率低；目前各种高效率的新型锅炉已经面世了。
了解锅炉和空气加热器的效率
锅炉的燃料效率通过年度燃料利用率afue来衡量。联邦贸易委员会的要求新出厂的锅炉标注出年度燃料利用率，这样消费者可以比较各种加热设备的热效率年度燃料利用率是设备效率的衡量标准。具体地说，它表明了一年里燃料所贡献出的有效能量。
年度燃料利用率90%意味着90%的能量变成有效热量，而其他10%的热量失散了。年度燃料利用率不包括管道系统的热损失，当管道设置在阁楼时，这部分热损失高达锅炉输出热的35%。全电锅炉没有烟气损失。
Understanding the Efficiency Rating of Furnaces and Boilers
A central furnace or boiler's efficiency is measured by annual fuel utilization efficiency (AFUE). The Federal Trade Commission requires new furnaces or boilers to display their AFUE so consumers can compare heating efficiencies of various models. AFUE is a measure of how efficient the appliance is in the energy in its fuel over the course of a typical year.
Specifically, AFUE is the ratio of heat output of the furnace or boiler compared to the total energy consumed by a furnace or boiler. An AFUE of 90% means that 90% of the energy in the fuel becomes heat for the home and the other 10% escapes up the chimney and elsewhere. AFUE doesn't include the heat losses of the duct system or piping, which can be as much as 35% of the energy for output of the furnace when ducts are located in the attic.
大部分美国家庭都用锅炉取暖。锅炉加热空气并且把加热的气体通过管路输送到房间里。蒸汽通过管道输送到蒸汽散热器里，而热水可以通过散热器和地板辐射环路把热量传给房间。蒸汽锅炉和热水锅炉相比，它的工作温度高，热效率低；目前各种高效率的新型锅炉已经面世了。
了解锅炉和空气加热器的效率
锅炉的燃料效率通过年度燃料利用率afue来衡量。联邦贸易委员会的要求新出厂的锅炉标注出年度燃料利用率，这样消费者可以比较各种加热设备的热效率年度燃料利用率是设备效率的衡量标准。具体地说，它表明了一年里燃料所贡献出的有效能量。
年度燃料利用率90%意味着90%的能量变成有效热量，而其他10%的热量失散了。年度燃料利用率不包括管道系统的热损失，当管道设置在阁楼时，这部分热损失高达锅炉输出热的35%。全电锅炉没有烟气损失。
