Page 67 - CARILEC CE Journal CEMAY2021

CASE STUDY power plant. The customer, who owns 5 Jenbacher
engines (cogenerators) with internal combustion,
ZE-50-ULH - Italy chose to recover the hot fumes generated by his
One of the projects we are completing is at a engines, in order to produce further electricity
livestock farm specializing in cattle rearing and with ORC technology, increasing in this way, the
located in the province of Padua, Italy. It has been overall efficiency if his power plant. The ORC
decided to acquire a biogas production system module selected at this purpose exploits the
on the farm fuelled by the fermented sewage heat contained in the engine fumes using a heat
created from the cows. The biogas produced in recovery heat-exchanger, which transfers the heat
the fermenting tanks is used as fuel for a micro- of these exhaust gases in clean water, generating
power plant based on a 637-kW engine by the superheated water at 160 ° C to feed the ORC
German firm Jenbacher. The plant takes advantage module. The selected system can produce up to
of the favourable, all-comprehensive tariff which 420 kW of gross electricity, bringing the current
the Italian government grants to new, small power electric production of 6800 kWe of the motors
plants powered by renewable energy sources. alone to 7220 kWe, with a percentage increase of
The ORC system supplied, a ZE-50-ULH low 6.2%.
temperature Organic Rankine Cycle module -
recovers waste heat from flue gases and cooling ZE-40-ULH – Korea
jackets of the aforementioned Jenbacher engine, This plant – our first installation in the Far East – is
and thus contributes significantly to the overall found in the main hamlet of a small island, located
system efficiency and productivity. The ORC module in the Yellow Sea off the south-eastern shore of
is entirely contained in a custom container, located South Korea. This small island, occupying less than
outdoors, which is both compact (4,2 x 1,5 x h 3,1m) 20 km2, is home to about 3,000 persons who rely
and fully weatherproof. This container hosts the on a local power station based on eight large diesel
whole ORC system, including turbine, secondary gensets for their electricity.
heat exchangers and control panel, as well as a The plant owner has given a Korean private
climatization system for the control panels. Cooling firm has been given the task to increase plant
for the condensation part of the cycle is ensured efficiency. As such, Zuccato Energia was asked
by an EvapCo cooling tower located beside the to manufacture a 30 kWE nominal output Low-
container. Temperature ORC Module with a peak output
power of 40 kWE and maximum efficiency of 9%
ZE-400-LT – Argentina designed to operate by recovering the heat from
This Argentinian customer has decided to valorize a 1 MW diesel engine operating one of the gensets
his company's waste heat by creating an ORC according to their specifications.

CONCLUSION
"Environmental sustainability" is becoming the
watchword of the company vision; and energy
consumption is the key element in assessing the
environmental impact of an energy-intensive sector.
Waste heat recovery through ORC technology
becomes the means to achieving this goal –
recovering heat at medium and low temperatures
regardless of the fuel burned by the engine to reduce
the environmental impact, while at the same time
reducing economic impact, allowing the exploitation
of waste and conversion into electricity, with high
flexibility and minimal maintenance requirements.

Fig. 3 Zuccato Energia ORC System in Area Test

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