0引言在美国,冷水机组和大型空调设备的市场主要取决于总的经济状况、政府的政策以及工业界的技术发展。在2005年,此工业受到几项主要发展的剧烈影响,值得注意的是在能源费用、政府的能源政策和在寻常的自然和气候条件方面。在技术方面,一些更为创新的、高能效和环境友好的技术和产品已经公开推 0 Introduction In the United States, the market for chillers and large air-conditioning units depends largely on the overall economy, government policies, and technological developments in industry. In 2005, the industry was severely affected by several major developments, notably in terms of energy costs, government energy policies and in the usual natural and climatic conditions. In technology, some of the more innovative, energy-efficient and environmentally friendly technologies and products have been publicly pushed