Word: steams
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Dates: during 1990-1999
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...Commonwealth Energy makes steam and we buy it from them," Hawkes says. "The steam travels in underground tunnels and across the river to serve different buildings at Harvard. There are about three-and-a-half miles of tunnels extending from the Blackstone power station along Memorial Drive and north to the Law School and through the Weeks Memorial foot bridge to the Business School...
Approximately 200 University buildings are currently heated with steam although only Radcliffe and the Quadrangle have their own boiler rooms, says Hawkes...
...Steam is an older method of heating that Harvard has used since the 1920s, but the College is by no means the only institution to maintain this seasoned process. According to Morris A. Pierce, district energy historian and energy manager for the University of Rochester, a recent census by the Department of Energy found more than 30,000 district heating systems in the United States and thousands more worldwide...
...This method of heating is used in various parts of the country, but mostly in Europe," Hawkes says. Chief Engineer Paul A. Parziale adds, "Harvard is the plant's biggest customer. We're a small co-generating plant. We produce electricity and steam, [and] the steam mostly goes to Harvard...
Hawkes says that the plant produces steam at high pressure, runs it though turbines to create electricity and then distributes the lower pressure steam to be used for heating...