Renewable Energy Technology Assessments - Kauai Island Utility ...

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Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 10.0 Landfill Gas Plant Input Data Economic Input Data Rate Escalation Capital Cost ($1,000) 3,633 First Year Fixed O&M ($1,000) 101.69 3.0% Total Net Capacity (MW) 0.81 First Year Variable O&M ($1,000) 110.43 3.0% Capacity Factor 86% Fuel Rate ($/MWh) 0.00 3.0% Full Load Heat Rate, Btu/kWh (HHV) 11,491.00 Debt Term 15 Project Life 15 Present Worth Discount Rate 5.0% Hours per Year Annual 8,760 Levelized Fixed Charge Rate 9.63% Avoided Avoided Capital Variable PW Total Capacity Energy Cost Fixed O&M O&M Fuel Rate Fuel Cost Total Cost Cost Busbar Cost PW Cost Cost Cost Year ($1,000) ($1,000) ($1,000) ($/MBtu) ($1,000) ($1,000) ($1,000) ($/MWh) ($/MWh) ($/kW) ($/MWh) 2009 350 102 110 - - 562 535 91.66 87.30 0.00 111.89 2010 350 105 114 - - 568 516 92.70 84.08 0.00 121.46 2011 350 108 117 - - 575 497 93.77 81.00 0.00 131.10 2012 350 111 121 - - 582 479 94.87 78.05 0.00 133.40 2013 350 114 124 - - 589 461 96.00 75.22 0.00 139.93 2014 350 118 128 - - 596 445 97.17 72.51 160.34 146.48 2015 350 121 132 - - 603 429 98.37 69.91 162.00 155.09 2016 350 125 136 - - 611 413 99.61 67.42 160.15 159.54 2017 350 129 140 - - 619 399 100.89 65.03 192.08 155.25 2018 350 133 144 - - 627 385 102.20 62.74 192.80 164.57 2019 350 137 148 - - 635 371 103.56 60.55 192.35 168.47 2020 350 141 153 - - 644 358 104.95 58.44 183.14 166.80 2021 350 145 157 - - 652 346 106.39 56.42 203.74 163.22 2022 350 149 162 - - 661 334 107.87 54.48 200.11 168.86 2023 350 154 167 - - 671 323 109.39 52.62 196.32 159.73 Levelized Bus-bar Cost, $/MWh Net Levelized Cost ($1,000) Kekaha Landfill Landfill Gas 98.83 606.04 Levelized Avoided Capacity Cost, $/MWh 14.11 Levelized Avoided Energy Cost, $/MWh 146.25 Levelized Cost Premium, $/MWh (61.54) Figure 10-3. Kekaha Landfill Gas 15-Year Busbar Cost Calculation. 10.7 Advantages and Disadvantages of Technology 10.7.1 Fit to KIUC Needs This landfill gas project is a good, but not ideal fit to KIUC’s needs. It is a small amount of generation that is well-sized to be of value to KIUC. Further, the capacity of the system fits well with KIUC’s current system needs. 10.7.2 Environmental Impact The environmental benefit of this project would be twofold. The first benefit is preventing additional methane from escaping to the atmosphere. Methane is a potent greenhouse gas – 21 times more damaging than carbon dioxide. Capturing it and burning it in an engine or a flare reduces greenhouse gas emissions. Second, because the methane is not actively collected, there is potential that it could build up and cause an explosion in the future. Installing an LFG project would greatly reduce this possibility. 21 March 2005 10-7 Black & Veatch
Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 10.0 Landfill Gas 10.7.3 Socioeconomic Impact This LFG project would have relatively minimal socioeconomic impact. It is not expected that more than one long term salaried position would be created by the project. Construction labor impacts will also be relatively low compared to the other renewable energy projects. 10.7.4 Incentives and Barriers LFG projects have good appeal in terms of incentives and barriers. Generally, the public understands and accepts the technology as mature and environmentally positive. The project would be quick to implement with minimal planning, engineering and permitting compared to other technologies. KIUC already maintains staff who are knowledgeable of IC engine operations. There would be minor nuances to learn about burning LFG, but the transition would be straightforward. This project has previously been considered and studied, so there is already positive momentum toward implementing the project. Finally, the landfill owner seems willing to consider the project; this can be a significant hurdle for other projects. There are no significant non-economic barriers perceived for this project. 10.8 Next Steps The first step that should be taken to advance this project is to definitively understand what the closure date will be. As illustrated earlier, this will have a tremendous impact on the project gas production numbers. Another early activity to pursue is obtaining and testing a gas sample from the existing landfill. Of primary importance are the lower heating value and gas contaminants. Unsatisfactory results could require additional capital expenditures for gas improvement equipment or modification of landfill operations. After the gas sampling, the next two steps would be executing a Letter of Intent with the County to establish terms of the development. Execution of this document is a precursor to signing a gas transfer agreement with the County by which KIUC will be entitled to use the LFG. This is analogous to a PPA for landfill gas. 21 March 2005 10-8 Black & Veatch
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Renewable Energy Technology Assessments - Kauai Island Utility ...

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