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Waste Heat to Power WH2P Applications using SCO2

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Waste Heat to Power WH2P Applications using SCO2 ( waste-heat-power-wh2p-applications-using-sco2 )

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Applications Example for a Remote Power Generation Facility A remote community located in northern Canada includes a 6.5 MWe electrical power collective containing four 1.05 MWe and two 1.13 MWe reciprocating engine gensets fueled by natural gas from a large gas transportation pipeline that passes through the region. The genset sizes and capacity factors and key operating characteristics are summarized in Table 1. Typically three gensets operate to provide 3.2 MWe baseload while maintenance is being performed on the second set of three units. For six months, coinciding with their spring/summer season, all units are operated to provide up to 6.5 MWe of peak power to support the additional demands of their local fishing and canning industry. Results of a waste heat to power analysis using an sCO2 heat engine for bottom cycling for each type of recip genset are summarized in Table 2. Table 1: Reciprocating Genset Operating Characteristics 1Q 2Q 3Q 4Q Genset Unit No. 1 1,050 2 1,050 3 1,050 4 1,050 5 1,135 6 1,135 75 off on 75 off on 75 on on 75 on on 75 off on 75 on on on on 763 on on 763 on off 763 on off 763 on on 794 on off 794 14,500 14,500 14,500 14,500 18,000 18,000 Nameplate Rating (kWe) Capacity Factor (%) Capacity Factor Profile Exhaust Gas Temperature (oF) Exhaust Gas Mass Flow Rate (lb/h) Notes: 1) Units 1, 2 and 5 operate on the same capacity factor schedule to provide 3.2 MWe baseload. 2) Units 3, 4 and 6 operate on the same capacity factor schedule to provide 3.2 MWe baseload. 3) Quarters 2 and 3 (Apr - Sep) is peak power season to support local fishing and canning industry. All units operating provide 6.5 MWe seasonal baseload. Table 2: Waste Heat to Power Analysis for Each Reciprocating Genset Genset Unit No. Nameplate Rating (kWe) Generated Power by Operating Quarter (kWe) 1Q 2Q 3Q 4Q Net Power Recovered Per Unit (kWe) Total Recovered Power by Operating Quarter (kWe) 1Q 2Q 3Q 4Q 1 1,050 --- 2 1,050 --- 3 1,050 1,050 4 1,050 1,050 5 1,135 --- 6 1,135 1,135 Total Generated Power by 3,235 Operating Quarter (kWe): 1,050 1,050 1,050 1,050 1,050 1,050 1,050 1,050 1,135 1,135 1,135 124 --- 1,135 1,135 --- 124 124 6,470 6,470 3,235 939393 939393 93 93 --- 93 93 --- 124 124 124 124 124 --- 620 620 310 1,050 93 --- 1,050 93 --- --- 93 93 --- 93 93 Total Recovered Power by Operating Quarter (kWe): 310 Based on analytical results, two Echogen EPS5 300 kWe heat engines could serve this application with genset Units 1, 2 and 5 connected to one EPS5 and genset Units 3, 4 and 6 connected to the second heat engine. A detailed engineering study would be required to 5

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