介绍了真空泵系统（设计用于改变可用蒸汽温度）的引入，作为一种方法和设备，用于大幅改进常规蒸汽加热操作，该操作通常包括锅炉或区域蒸汽供应，作为热源。中央系统可由（1）一个蒸汽-热水热交换器，（2）一个用于热交换装置的蒸汽疏水器，（3）一个真空泵（设计用于抽26英寸的真空）组成，用于排出不凝气体，从而使蒸汽压力复位，（4）一个监控面板，用于控制锅炉的燃烧器燃烧率或待接受的区域蒸汽量。 改造后的真空泵和控制装置提高了加热系统的效率，同时显著降低了控制系统的运行成本。关键词:空气泵，室外，控制，蒸汽，温度，蒸汽锅炉，现代化，区域供暖，集中供暖，蒸汽疏水阀，热交换器，水-空气热交换器，效率，性能，成本，节能，能源消耗，美国。引文:研讨会，ASHRAE交易1993，第99卷，pt。1.

Describes the introduction of a vacuum pumping system (designed to vary the usable steam temperature) as a method of and apparatus for substantially improving a conventional steam-heating operation, which normally consists of a boiler(s) or a district steam supply, as a source of heat. The central system could be composed of (1) a steam to hot water heat exchanger, (2) a steam trap for the heat exchange unit, (3) a vacuum pump (designed to pull 26 inches of vacuum) for removing noncondensable gases, thus allowing the vapour pressure to be reset, and (4) a monitoring panel designed to control either the burner firing rate of the boiler(s) or the volume of district steam to be accepted. The retrofit vacuum pump and control apparatus improve the efficiency of the heating system while markedly reducing the control system operating cost.KEYWORDS: air pumps, outdoor, controls, steam, temperature, steam boilers, modernising, district heating, central heating, steam traps, heat exchangers, water air heat exchangers, efficiency, performance, costs, energy conservation, energy consumption, USA.