Transforming clinical
trial outsourcing
As part of an energy rationalisation project, a major global pharmaceutical company
is benefiting from a new combined heat and power plant that generates electrical
power and process cooling for its site operations.
Combined heat and power (CHP) systems offer an
environmentally friendly option for the provision
of power and energy through the simultaneous
generation of usable thermal energy and electricity. Heat
can be delivered as hot water, hot air or steam, or in any
combination of the three forms.
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This cogeneration system can achieve an operational availability in
excess of 92% at full load. |
Dresser-Rand has manufactured, installed and
commissioned its own cogeneration project for a major
pharmaceutical company. The resulting heat energy will
be used to produce chilled water via an absorption
chilling plant. This cogeneration system consists of two
natural gas-fuelled cogeneration units. Each unit is rated
at 1.475MW electrical output and generates power at
10.4kV, three-phase, 50Hz for direct use at the facility.
Heat is recovered from the engines’ cooling and exhaust
systems in the form of hot water and is fed directly to
close-coupled, single-effect, lithium bromide absorption
chillers, each of which produce 1.025MW of chilled water
to serve cooling loads.
Efficiency and savings
The Dresser-Rand cogeneration system is designed to
achieve an operational availability in excess of 92% at full
load and deliver an annual electrical output of 24.2GWh
with an annual cooling output of 16.8GWh. Anticipated
CO2 savings, compared with conventional forms of supply,
are 6,300t per year.
“This project demonstrates how the correct application
of cogeneration can assist companies in delivering their
energy-saving and carbon-reduction commitments,
while improving their competitiveness,” said Ian Hopkins,
director of worldwide business development for the Dresser-
Rand CHP business unit based in Peterborough, UK.
The CHP process displaces a large percentage of the
electricity previously supplied by the grid. Currently, the
facility operates at 65% efficiency for electricity and
chilled water delivery, with an overall thermal efficiency of
77% on a gross fuel input basis (85% on a net fuel input
basis).This compares favourably with importing grid
power that can be generated at an efficiency level as low
as 35% at the generation point, with an additional
efficiency loss of 7-9% in the transmission and distribution
system (and in producing chill from a conventional vapour
compression chilling plant).
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"The cogeneration system offers
potential CO2 savings of 6,300t
per year compared with
conventional forms of supply." |
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The chillers have been assembled with all necessary
pumps, heat exchangers and controls into engineered
packages of the same construction as the matched gas,
engine-driven generator sets and heat recovery units.
Cooling of the absorption chiller packages and engine
systems is carried out by a separate cooling tower system
controlled by the integrated overall scheme control system.
About Dresser-Rand
Dresser-Rand is among the largest suppliers of rotating
equipment solutions to the worldwide oil, gas, petrochemical
and process industries. The company operates manufacturing
facilities in the US, France, UK, Germany, Norway, India, and
China, and maintains a network of 39 service and support
centres covering more than 140 countries.
Dresser-Rand has principal offices in Paris and Houston and
reported revenues of approximately $2 billion in 2010. |
