Renewable Energy Technology Assessments - Kauai Island Utility ...

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Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 10.0 Landfill Gas Annual Generation, MWh/yr 6,500 6,400 6,300 6,200 6,100 6,000 5,900 5,800 5,700 5,600 5,500 2008 2010 2012 2014 2016 2018 2020 2022 2024 2026 Figure 10-2. Annual Electrical Generation. Table 10-1. LFG Capital Cost Estimate. Construction Item Cost Engine Generator Set 599,000 Electrical System 301,000 LFG Collection System 1,580,000 Total Direct Cost 2,480,000 Indirect Cost 748,000 Total Capital Cost 3,228,000 Total Capital Cost, $/kW (810 kW) 3,965 10.6.2 Operating and Maintenance Costs Black & Veatch has estimated that the first year O&M cost will be $190,000. This is inclusive of fixed and variable costs. It is assumed that one full time staff will operate and maintain the facility, likely remotely. Other items included are planned replacements of bearing and heads and routine maintenance such as changing the oil. Periodic engine rebuilds are also included as planned maintenance costs. 21 March 2005 10-5 Black & Veatch
Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 10.0 Landfill Gas 10.6.3 Applicable Incentives There are several federal incentives available for the development of landfill gas power generation facilities. The federal production tax credit provides a $9/MWh incentive for five years following the initial commercial operation date of the facility, however the facility must be owned by a taxable entity to claim this credit. The PTC is included in the life-cycle cost analysis for the developer ownership scenario. Various federal grants and low interest loan programs would be applicable to these projects; however, the exact impact of these programs is uncertain and not quantified at this time. Therefore, no incentives are included for the KIUC ownership scenario in the life-cycle cost analysis. 10.6.4 Life-cycle Economics The life-cycle cost of providing power from the potential landfill gas-to-energy project at the Kekaha landfill was calculated with the levelized cost. The project performance and economic assumptions as well as the results of the life-cycle cost analysis are presented in Table 10-2. Figure 10-3 shows an example life-cycle cost calculation for the Kekaha Landfill Gas project. Table 10-2. Landfill Gas Life-Cycle Economic Assumptions ($2005). Unit Kekaha Landfill Capacity MW 0.8 Capital Cost $/kW 3,965 First Year Fixed O&M $/kW-yr 111 First Year Variable O&M $/MWh 16 First Year Fuel Cost $/MBtu - Net Plant Heat Rate Btu/kWh 11,491 Capacity Factor percent 86% KIUC Levelized Cost 2009$/MWh 98.83 KIUC Premium 2009$/MWh (61.54) Developer Levelized Cost 2009$/MWh 119.96 Developer Premium 2009$/MWh (40.40) The levelized cost of the landfill gas project was calculated to be about $99/MWh, with a premium of about ($62)/MWh. The favorable economics of the landfill gas project relative to forecasted avoided costs are due, in part, to the free fuel and the high capacity factor. 21 March 2005 10-6 Black & Veatch
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Principal Investigators: Ryan Pletk
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