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ENGINEERING EVALUATION <br /> I� <br /> I. Emission Unit Increase in Permitted Emissions (IPE) : <br /> The proposal is the new emission unit . The District will use the following equation to <br /> calculate IPE: <br /> IPE = PE (for the new unit) <br /> A . Potential to Emit from the new emission units (PE) <br /> HP rating of IC engine = 20 HP <br /> Input heat required by the engine = 20 HP x 7000 Btu/hp-hr4 <br /> = 140 ,000 Btu/hr <br /> Input heat from gasoline vapors <br /> Maximum Influent concentration of hydrocarbon = 5 , 200 ppm <br /> VOG n„eo, = Conc . idbCnt x flowrate x mol . weight x ( 1 lb-mol/379 ft') <br /> = 5 ,200 ppm x 160 cfm x 95 lb/mole x 1440 min/day x ( I lb-mole/379 ft') <br /> = 300.3 lbs/day <br /> Input gasoline = 300. 3 lbs/day x I gal/6 . 17 lb <br /> = 48. 7 gal/day (or 2 . 0 gal/hr) <br /> Heating value of gasoline = 130,000 Btu/gal <br /> Input heat from gasoline vapors = 2 . 0 gal/hr x 130,000 Btu/gal <br /> = 260,000 Btu/hr <br /> [As the input heat from gasoline vapors is more than needed by the IC engine, therefore <br /> the influent vapor stream will be blended with air to get exact fuel to air ratio] <br /> Input heat required by the engine = 140 , 000 Btu/hr <br /> Heating value of gasoline = 130 , 000 Btu/gal <br /> therefore, Maximum gasoline usage = 140 , 000 Btu/hr - 130 , 000 Btu/gal <br /> = 1 . 1 gal/hr (or 26 .4 gal/day) <br /> 4 Average brake specific fuel consumption (BSFC) value from AP 42 Table 3 . 3- 1 <br /> 5 <br />