1278516991595a1267106724867-brochure-o-wartsila-solutions-2015

Environmental excellenceOffshore gas flaring is increasingly recognised as a major environmentalproblem, causes 400 million tons of CO 2 in annual emissions, not tomention the valuable resources that go to waste.The associated gas, separated from crude oil, is traditionally flaredand not utilised because it varies in composition, and contains a lotof heavier hydrocarbons. Generally it is considered as waste or anunreliable source of energy.With the Wärtsilä GasReformer, this undesired gas can be reliablyand efficiently utilised by Wärtsilä dual-fuel engines. When utilisingassociated gas or recovered VOCs as a reliable source of energy,the operator can achieve self-sufficiency in terms of energy supplyand thus the need for fuel bunkering, a costly operation in offshorelocations, decreases. With an 8 MW Wärtsilä GasReformer combinedwith a dual-fuel engine utilising associated gas, the operator canreduce the need for bunkered fuel oil by about 35–39 tons per day.With a Wärtsilä DF engine the system produces electricity with anoverall efficiency of up to 44.5%.Key benefits• z Reduction of CO 2 and VOC emissions• z Flare gas can be utilised for power production• z No need for flaring• z Reduced fuel consumption and fuel bunkering• z Low NO X emissions from proven dual-fuel engines• z Dual-fuel engines can operate at full load and efficiency• z Operator can change gas source during operation• z Decreased carbon footprint for operating companyProduct Specification per 1 MW shaft power of DF enginePressure (design)7–10 (11) bargTemperature (design) 300-420 (500) °CFeed gas (MN 50) mass flow rate 189 kg/h/MWFeed gas volumetric flow rate 176 kg/h/MWTotal steam demandof which recycled condesate waterof which fresh water220 kg/h/MW170 kg/h/MW50 kg/h/MWCooling demand150 kW/MWDimensions (mm) and weights (tonnes)GasReformer capacity Length Width Height WeightGAS RECOVERYEl. heater,max (kW)Nitrogenconsumptionstart-up(shut-down)4 MW 5000 3000 3000 15 30 5 (20) Nm 38 MW 5800 3500 3500 18.5 100 6 (27) Nm 318 MW 7000 4800 4200 40 250 15 (60) Nm 3105