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美国区域供热、制冷系统已有一百多年的历史，其管网敷设形式是由本地区的经济发展、实践经验、技术标准等诸多因素决定的，经历了几代演变发展。下文将对美国部份城市及地区的典型管网作一简要介绍，以供参考。1、圣·保罗市区域热网（DistrictEnergySt．Paul）该市以“石油危
The US district heating and cooling system has a history of more than one hundred years. The form of pipe network laying is determined by many factors such as the economic development, practical experience, and technical standards in the region. It has undergone several generations of evolution and development. The following section will provide a brief introduction to typical pipe networks in some cities and regions of the United States for reference. 1. The City of St. Paul’s District Energy St. Paul