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					                                McCRACKEN POWER PLANT GENERAL INPORMATION

The power plant has no electrical generating capability (peak summer demand is 95 mW). It
provides steam, hot water and chilled water for campus consumption. The plant generates
85% of the non-electric Btus used by the main campus. Steam produced at the plant
supplies: space and water heating, turbine driven chilling, absorption air conditioning,
autoclaves, distillation units, food service, soil sterilization at some of the
greenhouses, humidification, and experiments. The average steam load during the summer
is approximately 150,000 1bs/hr. Peak winter load is 500,000 1bs/hr and the average
winter load is 312,000 1bs/hr.

      The Power Plant has five boilers:
   #   FUEL               STEAM CAPACITY                   STEAM PRESSURE   TEMP.
                          (1bs/hr)                         (psig)           (oF)
   1   Gas/#2 oil         150,000                          200              660
   3   Gas/#2 oil         150,000                          200              660
   5   Gas/#2 oil         220,000                          600              750
   6   Gas/#2 oil         150,000                          200              660
   7   Gas/#2 oil         150,000                          200              660

There is storage capacity for 480,000 gal (a seven day supply) of #2 fuel oil and 30,000
gal of diesel fuel located in a tank farm behind the plant. The coal fired boiler (#8)
was removed from service in 2005 due to problems with the boiler and pollution control
equipment. The 200 psi boilers supply a 200 psig loop header system that feeds 6 campus
main steam lines, 2 turbine driven chillers and auxiliary loads. #5 boiler supplies 600
psig steam to a pressure reducing valve which feeds the 200 psig steam header.

There are two 138 KV feeders that supply OSU Substation from American Electric Power
Company. The campus power system distributes power at 13.2 kV through underground
feeders. Most campus buildings have two power feeders (radial feed) to increase
reliability. A third transformer has been purchased and is on site awaiting

There are 3 diesel generators for emergency power at McCracken Power Plant. One 1200 KW
and two 2250 kW diesel generators feed power plant loads in case of a power outage.
There is no way to export power from those units to other campus buildings. Steam or gas
turbine generation is under consideration to supply critical campus loads in case of a
regional power outage.

Two 2,000 ton turbine-driven centrifugal chillers, five 2,000 ton dual compressor
electric centrifugal chillers, two 775 ton electric centrifugal chillers, a 450 ton
electric rotary screw chiller, nineteen cooling towers, and a plate-and-frame heat
exchanger have been installed to supply some of the campus from a central chilled water
system. Thirty inch mains supply chilled water to some central campus buildings at 42oF
and return it at 58oF. The system utilizes variable speed pumping at the consumer
buildings. In addition to comfort cooling, the chilled water system provides cooling for
research lasers, cooling and dehumidification for clean rooms and a heat sink for the
refrigerators and freezers at Blackwell Inn. Regional chilling plants are planned to
provide chilled water to the medical center complex and the east regional buildings,
which can’t be fed economically from the central power plant.

D:\Docstoc\Working\pdf\56b1f3ea-0904-4f41-9b0f-4f1d7a69d703.doc                     7/5/2010