56.4MW GAS POWER PLANT FOR THE EKO ATLANTIC CITY, LAGOS, NIGERIA

The distributor MIKANO has officially entered into an agreement with HHI-EMD for the supply of six gas engine generator sets (HYUNDAI HiMSEN 20H35GV) to deliver a total of 56.4MW in the first phase of this partnership with a plan to extend to a total of 500MW.

This project will establish a primary power plant for the Eko Atlantic City development in Victoria Island , Lagos, with the supply of the of first batch of generators being delivered in early 2024.

The genset manufacturer HHI-EMD has become the forerunner in the sector of engine power generation as well. A great number of its domestic and overseas engine power plants have given superb performance, contributing to the HYUNDAI’s high reputation.

Specifications on the HYUNDAI gas engine genset are as follows: H35/40G(V) Rated Power of Genset at 100% load Heat Rate & Electrical Efficiency 720 rpm / 60 Hz

Rated Output (kW) Engine Type Heat rate In-line type Electrical In-line type Efficiency Vee type, It conforms to ISO 3046/1 reference conditions and is optimised to TA luft legislation at the reference condition.

The heat rate & electrical efficiency at generator terminals, without engine driven pumps and with +5% tolerance, are within normal parameters.

Fuel gas L.H.V. is 35 MJ/Nm³ with M.N. 80. The set is arranted at 100% load only.

The engine block is made of monoblock cast iron with a combustion air chamber.

The camshaft is of a split type for each cylinder and each camshaft is jointed by screws. Each piece of camshaft has an intake cam and an exhaust cam. Surface hardening has been provided for the each cam profile. The gear wheel for driving the camshaft, as well as the gear wheel for connection of governor drive, are mounted on the flywheel side. The front end block is located on the free end of the engine.

The extreme miller timing for intake cam has been applied to reduce NOx emission and prevent knock combustion. Variable Cam Timing (VCT) has been proven to be a very effective method in PFI (Port Fuel Injection) engines for improved fuel economy and combustion stability, and reduced emissions. In DISI (Direct Injection Spark Ignition) engines, VCT is applied in both stratified-charge and homogeneous charge operating modes.

Studies conducted in the past conceptualised Miller cycle by early inlet valve closure (EIVC) using also high values of boosted air pressure through two-stage turbocharging. These studies showed that extreme values of EIVC in conjunction with increased boost pressure resulted in a remarkable reduction of engine-emitted NOx up to 50% without deterioration of brake specific fuel consumption (BSFC) compared to conventional diesel engine operation.

Though various methods have been proposed in studies to materialise Miller cycle in diesel engines, it has not been clarified which is the best combination of methods for simultaneous reduction of diesel-emitted specific CO2 and NOx emissions.

More about the gas genset H35/40G(V) gensets provide an automation system for engine safety, control and indicating based on programmable logic controller. The system is independently installed in each engine and also can be connected to the remote system, for example main switch board of engine control room via hard-wired communication cables.

Gas engines like these are able to operate with more stability than other gas turbine under different ambient temperatures. The HYUNDAI gas engines have a shorter start time compared with gas turbines. Gas engines only take 7 minutes.

HYUNDAI gas engines have higher efficiency and lower emission rates in energy production, reports the company.

Engine specifications

Specifications are as follows:

*Number of cylinders: multi-cylinder

*Product applications: for generator sets, power generation

* Other characteristics- highefficiency

*Power:

Min.: 5,558 kW (7,556.774 hp)

Max.: 9,600 kW (13,052.363 hp)

*Rotational speed

720 rpm, 750 rpm (4,523.89 rad. min-1)

*Weight

Min.: 56 t (61.73 us ton)

Max.: 153.9 t (169.65 us ton)

*Length 10,810 mm, 11,435 mm, 12,384 mm, 12,437 mm, 13,062 mm (425.6 in)

*Width

1,460 mm (57.5 in)

*Height 4,753 mm, 5,325 mm (187.1 in) www.hyundai-ec.com