2671-07 Heating Plant FACT Sheet New - Dartmouth Collegeopdc/energy/heatingplant.pdf · Heating...
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HEATING PLANT The Dartmouth College Heating Plant has a storied history; the original Boiler Room granite foundation and brick building still exist today. The primary purpose of the Heating Plant has always been to supply steam to campus for heat and hot water. Today steam is also used for indirect humidification, dining services, and as the energy for steam absorption chillers, which supply campus buildings with chilled water used for air conditioning. The boiler plant is always operational and is constructed for reliability with standby equipment and systems always available to ensure the flow of steam. COGENERATION PLANT The Dartmouth Heating Plant is a cogeneration plant producing electricity as a byproduct of sending 20 pound. low pressure steam to campus. Back-pressure turbines act as reducing stations to lower the main steam pressure from the boilers down to the campus distribution pressure. The thermal energy of the steam is converted to mechanical energy in the turbine which in turn drives a generator to produce electrical energy. The thermal energy at the exhaust of the turbine is used to perform work on campus and is returned as condensate to the heating plant. Through cogeneration the plant supplies, on average, 45% of the electricity consumed by the main campus over the course of a year. The Dartmouth Plant is one of the oldest continually operated Cogeneration plants in the country with electrical generation commencing in 1904. HEATING PLANT 1898 PROCESS ONE-LINE OVERVIEW DARTMOUTH COLLEGE H E AT I N G P L A N T
Transcript of 2671-07 Heating Plant FACT Sheet New - Dartmouth Collegeopdc/energy/heatingplant.pdf · Heating...
HEATING PLANTThe Dartmouth College Heating Plant has a storied history; the original Boiler Room granite foundation andbrick building still exist today. The primary purpose of theHeating Plant has always been to supply steam to campusfor heat and hot water. Today steam is also used for indirect humidification, dining services, and as the energyfor steam absorption chillers, which supply campus buildings with chilled water used for air conditioning.The boiler plant is always operational and is constructedfor reliability with standby equipment and systems alwaysavailable to ensure the flow of steam.
COGENERATION PLANTThe Dartmouth Heating Plant is a cogeneration plant producing electricity as a byproduct of sending 20 pound. lowpressure steam to campus. Back-pressure turbines act as reducing stations to lower the main steam pressure from theboilers down to the campus distribution pressure. The thermal energy of the steam is converted to mechanical energy in the turbine which in turn drives a generator to produce electrical energy. The thermal energy at the exhaustof the turbine is used to perform work on campus and is returned as condensate to the heating plant. Through cogeneration the plant supplies, on average, 45% of the electricity consumed by the main campus over the course ofa year. The Dartmouth Plant is one of the oldest continually operated Cogeneration plants in the country with electrical generation commencing in 1904.
HEATING PLANT 1898
PROCESS ONE-LINE OVERVIEW
DARTMOUTH COLLEGEH E A T I N G P L A N T
BOILER AND TURBINE GENERATOR EQUIPMENT
The energy input for the boilers is #6 Fuel Oil.Taking suction from two(2) 125,000 gallon tanks, oil isheated and pumped to the boiler burner fronts via acommon header. There are four high pressure boilers inthe boiler room and thru a combination of boiler loading and the number of units on line the campusdemand for steam is satisfied. Low emission NOx burners provide turndown ratios in the neighborhood of7:1 allowing the burners to go from minimum to maximum firing rates in order to meet the variablesteam demand of the campus.
With the turbines in automatic pressure control maintaining the 20# campus distribution pressure electrical production is optimized. Steam and electricityare distributed to campus in piping that is located in underground duct banks, along with a walking underground utility tunnel bisecting the main campus.A modern Distributed Control System consisting of analog and digital inputs and outputs control most all theplant process systems in automatic.
BOILER FRONT
TURBINE GENERATOR
BOILERS #1 #2 #3 #4Manufacturer Zurn Industries Babcock & Wilcox Nebraska Combustion Engineering
Year Built 1986 1958 1996 1966
Capacity (lbs/hr) 90,000 35,000 75,000 70,000
Turbine Generators #1 #2 #3Manufacturer Dresser-Rand Worthington Dresser-Rand
Year Built 1991 1970 1991
Rating 2MW 3MW 3MW
Employees: 16 total Operators: 8 Full Time (2 always on shift), All personnel qualified as operatorsMaintenance: Mechanical Maintenance (4)/ Instrument and Control Technicians (2)Managers: Plant Manager and Plant Supervisor
Tours are available by going to http://dartmouth.edu/~fom/services/engineering/powerplant.html
