Azura-Edo Independent Power Plant Environmental Impact ... - IFC

Government parastatal that has been established for the purpose of acquiring
the bulk of the power generated from new IPPs.
3.2.6 Power Plant Fuel Supply and Consumption
Fuel Supply and Supply System
The Project site is located less than a kilometre away from the ELPS, the
country’s main natural gas trunkline. The plant, therefore, will use natural gas
as the only fuel source. Natural gas will be delivered to the plant via the ELPS
and a circa 1 km spur line from the ELPS to a gas receiving station on the plant
site. Between the interconnect point on the ELPS and the boundary of the
Project Site, this spur will share the same right of way used by the spur that
connects the ELPs to the adjacent NIPP power plant.
The ELPS is owned and operated by the Nigerian Gas Company (NGC), the
centrepiece of which is a 36 inch trunk line with a capacity of 1 billion scf/d.
The ELPS is currently undergoing expansion and a second “twinned” pipeline
following the same right of way is under construction. Based on the current
speed of the pipeline construction, the ELPS Expansion is scheduled to reach
Ihovbor-Evboeka village and the Project site before the end of 2012, at least 18
months in advance of when the Project is likely to need commissioning gas.
The specification of the gas delivered to the gas receiving station will be in line
with the national gas specification adopted by the NGC.
The gas receiving station will be located in a fenced compound, and will
include an emergency shutdown system with a slam shut valve station. The
gas receiving station will also include scrubbers, filters, metering, dew point
heating units and pressure reducing equipment.
Black Start System
During power outages from the National Grid system (a frequent occurrence
in Nigeria) power required for the auxiliaries and for the gas turbine starting
(cranking) motors will not be available. As a result, Azura Power plans to
install three 3.7 MVA diesel units to provide the estimated 7.4 MVA required
to “Black Start” the power station. These units will also be available to assist
in the emergency shutdown required in the event of a total grid system
collapse.
Fuel Consumption
The typical full load fuel flow for a 9E configuration burning natural gas is
1,350 GJ per hour. This is equivalent to approximately 120 mmscf per day of
gas.
AZURA EDO IPP
3-8
DRAFT EIA REPORT