Overview by Coffman Electrical Equipment Onsite power simplified by Coffman Electrical Equipment April 30 2015 Allows for simple integration with renewables Inverter based cogeneration makes small scale CHP possible ID: 1012178
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1. Inverter based CogenerationOverview by Coffman Electrical Equipment Onsite power simplifiedby Coffman Electrical EquipmentApril 30. 2015Allows for simple integration with renewables
2. Inverter based cogeneration makes small scale CHP possibleEliminates need for complicated paralleling gearSimplifies Utility interconnect, similar to solar inverters.Variable speed motor reduces efficiency loses at partial loadsAbility to stage multiple unitsUses standard automotive style engines simplifying maintenance.Allows easy integration with batteries to maintain voltage stability.
3. Combined Heat & Power (aka cogeneration)Definition: The simultaneous production of two useful outputs (electricity + heat) from a single fuel source2-for-1: “A generator that makes free hot water”or“A boiler that makes free electricity”Gas in1,263,000 Btu/hrElectricity out100 kWThermal out700,000 Btu/hr100.0%27.0%55.4%>82.4% total (HHV basis)>92.8% total (LHV basis)
4. Benefits to SiteECONOMICSCut energy costs by 30-50%Qualify for incentives (utility/ fed/ state)Reduce exposure to utility rate volatilityENVIRONMENTALCut carbon footprint by 50%Increase efficiency Lower emissionsSECURITYBlack-start capability (supplemental standby capacity = “convenience power”)Power qualityReduce US dependence on foreign oil
5. Environmental Benefits of CHP: CO2 Emissions ReductionsWith TECOGEN INV-100, 576 fewer tons of CO2 are emitted each year, by 'SAMPLE TECOGEN INSTALLATION'49% Reduction
6. INV-100 FeaturesQualifies for Standardized InterconnectionUL1741 CompliantCE Marked for European UseBlack-Start/Grid-Independent OperationCompatible With CERTS “Wireless Droop” ControlPower QualityNo Reactive Power UsePower Boost for Demand-Side ResponseEnhanced EfficiencyLow EmissionsInternationally Adaptable50/60 hz
7. Premium Power Module - Inverter Interface Power Conversion
8. General LayoutAdditional FeaturesWater-cooled Generator/ ElectronicsLarge Oil SumpNew Exhaust HX/ Catalyst DesignExtra Cat SurfaceExtra Sound- Attenuated Enclosure
9. Power Electronics/ Generator
10. PerformanceExcellent part-load efficiency
11. INV-100 Part Load PerformanceINV-100 ModulationElectricalOutput(kW)FuelUsage(BTU/hr)HeatRecovery(BTU/hr)ElectricalEfficiency(%)OverallEfficiency(%)1001,262,760700,00027.082.580991,440557,80027.683.860751,740442,10027.386.140541,620330,72025.286.3
12. CM-100XTypical Facility - Normal Operation Three Unit SiteAll Feed Power Into The Same Circuit“Load Center”INV-100’s Provide Some Power3 x 100 kW (300 kW)Balance From the UtilityExample:Loads all 100 kW (500 kW Total)Utility Supplies 200 kW“X” Reactance Key Device for Load Sharing ControlsFacility BreakerCM-100XCM-100XUtilityFeedLoad Group 1 Load Group 2 Load Group 3 Load Group 4Load Group 5
13. CM-100XTypical Facility - Outage Facility Breaker is Open to Isolate System/Protect LinemenExcess Loads are Disconnectedload 2 and 4 in this ExampleUnits Power Loads 1, 3, 5Power is Shared EquallyNo Load Sharing Controls RequiredCan be Manual or AutomaticOr “Uninterruptible” (UPS)Facility BreakerCM-100XCM-100XUtilityFeedLoad Group 1 Load Group 2 Load Group 3 Load Group 4Load Group 5
14. Brevoort CHP plant consists of (4) 100kW Tecogen InVerde units which provide heating, domestic hot water and electricity for the 20 story co-op condo building. MICROGID CASE STUDYTHE BREVOORT, a 1950’s era co-op tower in the Greenwich Village section of New York City, maintained power, water and heat during the wide spread power outages left in the wake of Superstorm Sandy thanks to Tecogen’s combined heat and power (CHP) system.
15. Brevoort CHP plant consists of (4) 100kW Tecogen InVerde units which provide heating, domestic hot water and electricity for the 20 story co-op condo building. MICROGID CASE STUDYTHE BREVOORT, a 1950’s era co-op tower in the Greenwich Village section of New York City, maintained power, water and heat during the wide spread power outages left in the wake of Superstorm Sandy thanks to Tecogen’s combined heat and power (CHP) system.
16. DC based CHP These DC based generators are available in either Natural gas/propane or DieselVariable speed with Lithium battery charging integrated in engine controlAre available from 6 kw to 26 kw.Can be integrated into inverter packages up to 80 kw.
17. 25kW30kW60kW200kW100 – 400kWrecip. packaged CHPReciprocating Gas EnginePackaged CHP Systemsrecip. packaged CHP5kW128 – 2,129kW250 & 333kW turbines
18. Absorption Chilling30 tons of cooling available per 100 kw of CHPCombines heat from generator and heat removed from building into common low grade heat sourceThis heat can be reused in other requirements.
19. Engine driven Chillers 50-400 tons Recovers waste heat while providing Chillers.Lower Emissions than Fuel Cells Provides Energy savings at part load similar to Variable Speed ChillersAutomotive based engines.
20. 22 ton Engine driven Heat pumpHot and air cooled versionsBrings cooling tower waste heat to building distributions systemCOP of 2.2 to 3.1Recovers Data Center Heat.
21. Microgrid DesignMicro-grid is the integration of multiple technologies to provide backup power when grid power is unavailable or to maximize renewable power as % of total power.This same design can allow for the integration of Cogeneration and renewable heating/cooling systems.Allow for net zero application by at little additional cost through reduction of backup power cost and size.
22. Integrated CHP, solar PV/thermal with electric and thermal storage
23. Coffman Electrical Equipment Co3300 Jefferson SeGrand Rapids, Mi. 49548616-452-8708www.steadypower.com