KIUC Community Meeting Pumped Storage Hydro. May 28, 2015

Transcription

1 KIUC Community Meeting Pumped Storage Hydro May 28, 2015

2 Where Kauai Gets Its Power Fuel Mix 2009 Fuel Mix 2015 Hydro 9% Biomass 12% Hydro 9% Oil 91% Oil 62% Solar 17% 2

3 Renewable Energy Outlook for 2023 Oil/gas 34% Hydro 18% Biomass 12% Solar+storage 36% 3

4 Kauai s Solar Challenge 50% of Kauai s daytime demand for electricity will soon be met with solar Challenge is moving cheap solar power to evening peak hours Pumped storage provides a way to store solar energy and releasing energy when it s most needed 4

5 Daily Electricity Demand on Kauai 5

6 What is Pumped Storage Hydro? Generating Pumping 6

7 Pumped Storage Initial Work Identified 5 potential sites on Kauai Initial cost comparison for 7 configurations Two lead sites Puu Lua Puu Opae Worked with KIUC staff to derive routings and cost for transmission lines and grid connections Developed conceptual layouts on 2 lead sites Conducted initial biological surveys on 2 lead sites Identified archaeological and culturally sensitive areas for 2 lead sites 7

8 Pumped Storage Project Overview Load shifting capability to firm solar generation 25 MW design capacity and up to 250,000 kwh of daily storage Closed loop system no consumption of water Two project locations being considered Puu Lua/Haeleele this proposal involves rehabilitation of Puu Lua and construction of a new 30 MG reservoir Puu Opae/Mana this proposal involves rehabilitation of Puu Opae and Mana reservoirs Potential to provide pressurized irrigation Aiming to be operational by

9 9

10 Puu Lua Reservoir - Current 10

11 Puu Lua Reservoir after Rehabilitation 11

12 Puu Opae Reservoir- Current 12

13 Puu Opae Reservoir During Sugar Operation 13

14 Proposed Lower Reservoir Locations 14

15 Location of Haeleele Reservoir 15

16 Rendering of Haeleele Reservoir 16

17 Mana Reservoir During Sugar Operations 17

18 Agricultural Benefits Rehabilitation and long term maintenance of reservoirs Public safety improvements with bringing reservoirs into compliance KIUC pays for rehabilitation and maintenance of state-owned infrastructure Improvement and maintenance of access roads Existing roadways to the project reservoirs will be improved and maintained by the project allowing better access for others using the reservoirs and lands Modernizing and Improving the Kokee Irrigation System Increasing storage capability for downstream irrigation users current and future Reliable pressurized irrigation delivery possible Potential for decreased water losses and improved efficiency 18

19 Island & Community Benefits Most cost effective form of energy storage Supports higher renewable penetration Load shifting solar to evening peak demand Evening hydro generation off-setting fossil fuel Helps avoid curtailment of solar generation Member-owned legacy project that will store power inexpensively and reliably Increased grid system stability and reliability Provides improved access for hunting and recreational fishing 19

20 Current Status Puu Lua Received Approval of Concept by BLNR and ROE allowing KIUC permission to conduct engineering work and environmental & cultural studies Right-of-Entry obtained from ADC Initial phase of geotechnical work completed 20% engineering work nearing completion Wetlands delineation survey and report completed Puu Opae Received ROE from DHHL, including permission to conduct initial geotechnical surveys - expires May 31, 2016 Right-of-Entry obtained from ADC Several site assessments conducted Initial biological survey completed Site Characteristics 20

21 Geotech Survey Work Puu Lua 7

22 Next Steps Complete 20% engineering and costing for Puu Lua Conduct initial phase geotechnical surveys for Puu Opae in early July Conduct 20% engineering and costing for Puu Opae Evaluate project feasibility and potential project selection Final decision by KIUC Board on whether to proceed 22

23 Long Term Steps For Chosen Site Commence environmental assessment and permitting in 2016 Conduct archaeological and cultural surveys in 2016 Commence % engineering work in 2016 Secure financing 23

24 Mahalo and Questions