纳什维尔已经扩大了其固体废物区域供暖和制冷系统，以跟上其服务的城市中心区的动态增长。1986年，一项耗资3600万美元的扩建工程完工，为新的市中心会议中心和酒店、新的金融中心以及几座主要的新办公楼和现有办公楼提供蒸汽和冷冻水服务。垃圾发电厂为大约750万平方英尺（70万平方米）的公共和私人建筑供暖和制冷。该厂自1974年建成以来，92.5%的能源来自160多万吨（145万公吨）城市固体废物的消耗。热电联产包括在扩建项目中，以充分利用该设施1120吨/天（1016 tpd）的垃圾焚烧能力。 一台7.3兆瓦的汽轮发电机生产电力，出售给地区公用事业公司。新的400吨/天（363 tpd）大规模燃烧水冷壁焚烧炉锅炉结合了废物燃烧技术的最新发展（McNertney等人，1986年），其中几项首次被证明是对原有纳什维尔装置的改进。通过增加两台汽轮机驱动的离心式制冷机，制冷厂的制冷能力翻了一番，达到27000吨。配电系统扩展了7150多线性英尺（2179米），现在系统总长度约为4.2英里（6.8公里）。配水管道位于一条直径为8.5英尺（2.6米）的隧道内，该隧道穿过石灰岩。单位:双引文:研讨会，ASHRAE交易，1987年，第93卷，第。1，纽约州纽约市

Nashville has expanded its solid waste fired district heating and cooling system to keep pace with the dynamic growth of the downtown area of the city which it serves.A $36 million expansion was completed in 1986 to provide steam and chilled water service to the new downtown convention center and hotel, new financial center plus several major new and existing office buildings. The waste-to-energy plant heats and cools approximately 7.5 million square feet (0.7 million square meter) of public and private buildings. 92.5% of the energy produced by the plant since its beginning in 1974 has been generated from the consumption of more than 1.6 million tons (1.45 million metric tons) of municipal solid waste.Cogeneration of electricity was included in the expansion to fully utilize the facility’s 1120 tons/day (1016 tpd) waste burning capacity. A 7.3 MW steam turbine generator produces power for sale to the regional utility. The new 400 tons/day (363 tpd) mass burning, waterwall incinerator-boiler incorporates the latest developments in waste combustion technology (McNertney et al. 1986), several of which were first demonstrated as modifications to the original Nashville units.Chilling plant capacity was doubled to a total of 27,000 tons of refrigeration by the addition of two steam turbine-driven centrifugal chillers. The distribution system was e~pandedby more than 7150 linear feet (2179 m) to a system total now of approximately 4.2 miles (6.8 km). The distribution piping is in a tunnel 8.5 ft (2.6 m) in diameter bored through limestone rock.Units: Dual