Word: steams
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Dates: during 1990-1999
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...Cambridge Electric Company's power plant on Western Ave. uses either natural gas or fuel, depending on which one is cheaper to heat the water to steam, Hawkes says...
...efficient for the University to heat the buildings by steam rather than natural gas because the University "does not need storage tanks, a boiler room or a gas main," Hawkes says...
...walking through the tunnels, one can see the three main steam pipes lining the walls as well as a fourth pipe that carries condensate, or chilled water, back to the power plant to be reheated to steam...
Their other main function is to check the expansion joints. Because the temperature in the pipes can vary between 70 and 400 degrees when the steam is turned on and off, the steel is constantly expanding and contracting...
These expansion joints allow for the horizontal expansion when the steam is turned on around Sept. I and contraction when the steam is turned off after commencement, Hawkes says...