Presentation on theme: "UMED District Plan Update"— Presentation transcript:
1UMED District Plan Update ML&P MeetingAugust 27, 2013Municipality of AnchorageCommunity Development DepartmentKristine Bunnell, Project ManagerCarol Wong, Manager, Long Range PlanningPage & TurnbullwithRSA EngineeringDick Armstrong, PE, CEMKittelson & AssociatesHMSStrategic Economics
2UMED District Plan Update | What and Why Now? STAKEHOLDER-DESIRED PLANDesignated as a Major Employment Center in Anchorage 2020District Planning and ZoningState Grant ApplicationNo Federal or Muni FundsGRANT REQUIREMENTSCommunity Involvement PlanUMED District Plan UpdateParking Utilization StudyEnergy Cogeneration Study
3UMED Cogen Study Purpose Validate UAA/MLP 2008 Plan and UpdateCentralized 10 megawatt (MW) CHP Gas Turbine PlantUtilidors to distribute waste heat: $55M just UAA & PAMC,$63M with UAA DormsLocation for a centralized plant – UAA or APU near PAMCLimited distribution to only UAA, APU and PAMCEvaluate Alternate Solutions of Distributed CHP Systems at:● PAMC ● UAA● UAA Dorms ● MYC● SCF ● ANTHC● APU ● APIDefine Major Constraints:Tariff relief for demand chargesCode restrictionsML&P safety concernsEnstar concerns
4DISTRIBUTED COGENERATION DEFINED: Electricity and Heat production that is on-site or close to the load center and is interconnected to the utility distribution system.
5WHAT IS A MICRO TURBINE?CombustionchamberExhaust outputRecuperatorFuel injectorAir bearingsCompressorGeneratorAir intakeCooling finsTurbineIn layman's terms, “A miniature jet engine that runs at speeds up to 96,000 rpm and generates electricity and heat.Electrical Power Output30 kW to 100 MW rangeHighly ReliableUltra Low EmissionsMultiple Fuelsnatural gas, propane diesel, biodiesel, methane/biomass/liquid fuelsSimple/Cost Effective DesignVery Low Maintenance
6MICROTURBINES VS PISTON ENGINES Traditional Piston EngineUltra low emissionsLocal air permits and exhaust cleanup requiredLow maintenance – Six hours per yearHigh maintenance – Oil, Coolant, Injectors-160 scheduled maintenance periods in 5 yearsOn board digital electronicsExternal controls without power electronicsIntegrated utility protection & synchronizingRequires external relays & control equipmentLightweight & small footprintMore than twice the weight & footprint
8Equipment Basis of Analysis Capstone Micro Turbines Used for Analysis2 major suppliers analyzedCapstone: Represented locallyFlex Energy: Not represented locallyCapstone has 3 Size Offerings: 30 kW, 65 kW, 200 kW, MultiplesFlex Energy has 250 kW, MultiplesCapstone Fuels Selection: Liquid & Gas (diesel, jet fuel, propane, NG)Flex Energy: Only NG, PropaneCapstone has Direct Drive, 1 Moving Part, Air Bearings, Low MaintenanceFlex Energy Requires Gearbox, Lubricants, More MaintenanceBoth Allow Dual Mode – Standalone or Grid ConnectedFlex Energy Requires 8 hrs Maintenance/year, Capstone Requires 6Both Have Extremely Low NOX Emissions Due to Lean Fuel Mixture
9No Heat Exchanger Installed C200’s Cascaded for 1,000 kW total Capstone C30No Heat Exchanger InstalledC200’s Cascaded for 1,000 kW total10’ x 30’Exterior Installation at Cell Tower in Alaska
10Example CHP Alaska Locations Remote cell towers off gridPortage: 1 C30Homer: 1 C30Tazlina: 1 C30H2 Oasis Water Park1 C65 and 3 C60sMiscellaneous other locationsAlyeska Prince Hotel in GirdwoodFairbanks: 1 C65Montana creek DOT station (Mile 82 Steese Highway) 1 C65Kenai Peninsula (Fort Beluga, Kenai, Happy Valley, Nikiski, Ninilchik): 5 C30’s,4 C60’s, 14 C65’s, 4 C200’s, (this fall 2013: 2 C1000’s)Shemya: 7 C65’sBeing Installed NowOliktok Point: 4 C30’s (Diesel) US DOE Atmos. Radiation Meas. Program
12Potential Roadblocks to Implementation ML&P Interconnection requirements (113) state that cogen units cannot connect to the user’s load, but must be sold back to utility.CEA allows the customer to connect a CHP unit on the load side of the meter which reduces their demand charges.Financial incentive to use CHP is significanty reduced if customer cannot reduce his demand chargesPower Back Feed to Grid ConcernsInterconnecting disconnect device allows for non-utility generation lockoutUtility Power Quality ConcernsProtective relays are required to continuously analyzed both the load and the grid to isolate non-utility generation in the event of system disturbances.Finding Room Inside Existing or Outside Building for InstallationCode Restrictions: NFPA, Building Codes, Utility Restrictions
13Code Restrictions for Use of Micro-Turbines (Sample) NFPA 37: Std for Installation & Use of Gas TurbinesAdopted by reference in 2012 IFGC 616Adopted by reference in 2012 IMC 915Key Provisions (not all inclusive)Locate where accessible for fire fighters – NFPA 37,No combustible materials stored in room – NFPA 37,Interior walls, floors, ceilings must be 1-hour construction,except top floor – NFPA 37,Ventilation adequate to prevent build up of gasses – NFPA 37,Attached engine rooms need 1-hr wall where attached to structures – NFPA 37,Noncombustible construction on detached structure – NFPA 37,Keep detached structures 5’ from main building – NFPA 37, 4.1.4Natural gas supplies, piping, gas trains, regulators – NFPA37, 5.1Exhaust systems – NFPA 37, Chapter 8Controls & Instrumentation of turbines – NFPA, Chapter 9.3NFPA Chapter 11IEEE 1547: Interconnection of Distributed Resources w/gridAdopted provisions by serving utilityIncludes protective relays, utility manual disconnects
14ML&P Issues Rates for purchase of Energy: Non-Firm Power Rate $ /kWhML&P Interconnection Guidelines113 Class C FacilitiesNon-utility generator installations from 100 kVA to 1,000 kVA, where the stiffness ratio is at least 30, are Class C installations. The larger capacity of Class C facilities (relative to Classes A and B), and the consequent potential to island large sections of the ML&P electric system is of much greater concern. In addition, Class C installations can significantly influence primary feeder devices and operations.Class C installations shall have the producer’s non-utility generation equipment connected directly to the ML&P electric power system. Class C installations shall not serve any of the producer’s load(s) normally served by ML&P.CEA Interconnection Guidelines163 Class C FacilitiesNon-utility generator installations of 100 kVA to 1,000 kVA, where the stiffness ratio is at least 30, are identified as Class C installations.Given the larger capacity of Class C facilities (relative to Classes A and B), the potential to island large sections of the Chugach electric system is of much greater concern. In addition, Class C installations can significantly influence primary feeder devices and operations. Accordingly, the probability of interference with Chugach consumers and system equipment is high enough to necessitate more stringent interconnection requirements.
15ML&P Does NOT Permit Connecting CHP to Building Load
22UMED CHP Stakeholder Options Do nothingBase load CHPs to feed heat & power to building.**Size CHPs to feed heat, power to ML&P grid – no demand reductionCHPs in buildings that can be totally off grid via backup generation, or ML&P backup with open transition transfer switch. Pay 12 months demand at ($13.64/kW to $15.64/kW) if using ML&P for >15 minutes.Carry the entire facility campus using CHP generators, interconnected using smart grid to meet all thermal loads, and maximize efficiency by turning down lightly loaded units. Provide backup using diesel micro- turbine or existing diesel recip generators. Completely sever connection to ML&P, or work out a mutual backup agreement.Pick 1-2 buildings per stakeholder to test a proof of concept CHP to determine if they integrate to the system, work as desired and save as expected.**** Requires Interconnection Requirements Section 113 relief from ML&P
23RecommendationsRequest that ML&P remove Interconnection Requirement Section that prohibits demand reduction and requires selling all power back to ML&P. Permit connection of CHP on customer side of meter.Size distributed CHP units to pick up thermal loads, use power as base load and demand reduction.Priority locate CHP units in high thermal load buildings.Consider smart grid variable loading in primary metered locations.Use steam micro-turbines if high pressure steam (150 psi) is available to be reduced to 15 psi.
24Stakeholder Feedback Most Want to Try a Proof of Concept CHP Unit Example Potential POC Locations:Native Hospital mechanical room using steam micro turbineSCF data roomUAA Integrated Science buildingUAA Sports ComplexUAA Energy ModulesAPU Mosley Pool BuildingAPI boiler roomMYC boiler roomPAMC boiler roomMost Prefer to Base Load CHP, Sized to Pick up Thermal LoadAll Would Prefer to Continue Service with ML&PAll Want to See Relief on Connection Requirement to Reduce DemandSome Would Like to Use Smart Grid Behind Primary Metered Grid