Cogeneration
The CHP group equipped with a thermal engine
In such configuration the cogeneration group is made by coupling
an internal combustion engine to an electric generator, and a recovery
system for the generated heat.
Heat is recovered from the cooling circuits of the engine (cylinders
head), of the lubrication oil, and from the thermal exchange with
the high temperature exhaust gases.
The CHP system output is electric power and hot water.
In some cases it is useful to add to the system a water-fired absorption
chiller, so to produce “cool water” for climatisation.
In this situation the cogeneration unit is fitted into a” tri-generation”
system.
Generally, the hydraulic circuit for the heat recovery from the
thermal engine is separated from the user’s circuit through
an external heat exchanger, while
In the TANDEM® Micro-CHP group the thermal energy recovery
system is completely integrated inside the unit itself.
The TANDEM ® is equipped with
all the devices and protection systems complying with the current
EU technical regulations, and is certified by the FIAT Centre of Research
accordingly with the Electromagnetic Compatibility Directive.
The dedicated electronic system keeps under control all the basic
parameters (circuit temperature, oil pressure, etc.) and is actually
also a monitoring system for the user, even in a remote mode.
The parallel operation with the public electricity grid , a service
the TANDEM ® is ready to perform
accordingly to its safety intrinsecal protections, generally is
to be upgraded by additional devices certified by Local Electricity
Boards.
Such devices practically protect the CHP plants from being fed from
or to reverse to the public grid, shutting them to OFF in case of
a failure in the grid occurs respect to voltage and line frequency.
A special configuration of the TANDEM unit enables its use as an
EMERGENCY GENERATING SET
In this situation the TANDEM ®
runs “in island” like a real generating set at variable
output, keeping on the electric power toward priority loads, and
is ready for a new “parallel mode” operation, as soon
as the public line voltage and frequency parameters return to their
standard values.
In such a technical configuration it is necessary, of course, to
provide also for a radiator cooled by an electric fan, so to dissipate
the extra heat not used by the system itself, and guarantee a continuous
service in electric power.
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