Loading...
HomeMy WebLinkAbout97.Energy Policy PowerPointPresented by Rob Thompson Engineering Director OCSD Energy Policy Update OCSD Energy Picture (Average month: July 2015 –April 2016) •Internal •Bio Gas 22,877,440 kWhr Electrical Gen. 7,430,900 kWhr •External •Natural Gas 2,740 kWhr •*SCE Electricity 4,745,000 kWhr •Diesel Emergency Power Total 27,655,180 kWhr •Electricity 12,175,900 kWhr •Thermal 2,697,000 kWhr •Process 2,071,000 kWhr •HVAC 626,000 kWhr Supply Demand * 13,565,000 kWhr of biogas needed for electrical energy independence at 35% efficiency. Energy Demand •OCSD is very efficient in it’s utilization •Premium efficiency motors •Variable frequency pumping systems •Turbo air blowers •Fine bubble diffusers •Lighting Systems •Energy Audits Energy Recovery— Bio Gas Creation Secondary Treatment Primary Treatment Digester Bio Gas 65% Methane (CH4) 34% Carbon Dioxide (CO2) -640 BTU/CuFt 96°F 57% Solids Destruction Recirculation/Mixing Pump Hot Water Hot Water Return Biosolids 2.8% of Input Energy 9% of Input Energy 36% Conversion In case of emergency or Central Generation shutdown Captures: •Siloxane •Hydrogen Sulfide Bio Gas Cooler Gas Compressor Activated Carbon Central Generation Hot water/Steam to Process Electricity Chilled Water to HVAC Flare Energy Recovery— Bio Gas to Electricity and Heat Condensed Water Proposed Policy Statement •OCSD strives to be energy independent by minimizing energy utilization and maximizing useful energy recovery from the sewage it receives. •Energy independence supports OCSD’s primary mission by providing resilient, reliable operations at the lowest cost and environmental impact. •Once OCSD’s energy needs are met, excess renewable energy will be sold to support the electrical grid, natural gas distribution or as transportation fuel. Research/Partnering Focus •OCSD is focused on increasing Bio Gas production to fully utilize Central Generation Capacity to meet electricity and heat demand (no imported energy, fully utilize 18 MW generation capacity). •Sell excess energy to private markets: •Electrical Grid •Gas exports •Transportation Fuels (Bio Diesel, Compressed Gas, Hydrogen) •Maintain our carbon neutral exemption from the Cap and Trade System.