©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comAnalysis TrackUnderstanding and ReportingDegree Days, Greenhouse Gas,Car...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree Day Fundamentals
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com“Degree Days” is a weather analyticthat is only useful in the context of...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree days measure how much thetemperature varies from a “balancepoint ...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree DaysBased on dry bulb temperature only(does not account for humid...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree DaysUsed widely today for fuel oil fill-ups.BPT: NOAA’s selection...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comThe average annual temperature in San Diego is 65F.The average annual te...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWarm days and cool day...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comThese cities had the same 60F averagetemp for two days. Was building ene...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comConclusion:The use of Average Temperature failsto be a good indicator of...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comMDT (Mean Daily Temperature):Middle value between daily high anddaily lo...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comwww.WeatherDataDepot.com
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comwww.WeatherDataDepot.comYearly comparison reportChartsExcel and printMon...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comHow is Weather Used in EnergyCAP?Building ZIP CodeWeather link to Weathe...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWith weather adjustment, $78 savings
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWithout weather adjustment (forunusually mild winter), $352 savings
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWhy not also adjust for humidity,wind, sunshine, precipitation?Data is e...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comGreenhouse GasFundamentals
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comSix gases that have global warmingpotential:Carbon dioxidemethanenitrous...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comGreenhouse Gas FundamentalsMeasured in equivalent metric tons ofCO2 (oft...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA’s eGRID Database
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA’s eGRID Database
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA GHG Equivalencieswww.epa.gov/cleanenergy/energy-resources/calculator...
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA GHG Equivalencieswww.epa.gov/cleanenergy/energy-and-you/how-clean.html
©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comHow is GHG Used in EnergyCAP?MeterBuilding and Organizational rollupsGHG...
QuestionsVisit the Ace Place to learn more!©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com
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Reporting Degree Days, Greenhouse Gas, Carbon Footprint in EnergyCAP

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Degree Day definitions, fundamentals, examples, Degree Day use in EnergyCAP, GHG fundamentals,
eGRID, equivalencies, GHG use in EnergyCAP.

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Reporting Degree Days, Greenhouse Gas, Carbon Footprint in EnergyCAP

  1. 1. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comAnalysis TrackUnderstanding and ReportingDegree Days, Greenhouse Gas,Carbon FootprintPresented by Steve Heinz, PE, CEM
  2. 2. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree Day Fundamentals
  3. 3. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com“Degree Days” is a weather analyticthat is only useful in the context ofbuilding energy consumption.
  4. 4. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree days measure how much thetemperature varies from a “balancepoint temp” at which a building needsno heating or cooling.
  5. 5. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree DaysBased on dry bulb temperature only(does not account for humidity, wind,sunshine, precipitation)Concept developed in the 1930’s toestimate residential gas demand
  6. 6. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comDegree DaysUsed widely today for fuel oil fill-ups.BPT: NOAA’s selection of 65F as the“balance point temperature” is a poorchoice for modern non-residentialbuildings. 60F is better.
  7. 7. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comThe average annual temperature in San Diego is 65F.The average annual temperature in Dallas is 65F.In Dallas, annual A/C usage is 160% more and annualheating use is 350% of San Diego. How can that be?The average annual temperature in Orlando is 72F.The average annual temperature in Phoenix is 72F.In Phoenix, annual A/C usage is 63% more and annualheating use is 100% more than Orlando. Huh?
  8. 8. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWarm days and cool days cancel eachother out when average temperatureis used
  9. 9. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comThese cities had the same 60F averagetemp for two days. Was building energyusage the same?High Low Mean HDD CDDSan DiegoDay 1 65 55 60 0 0Day 2 65 55 60 0 0Average 60DenverDay 1 90 60 75 0 15Day 2 60 30 45 15 0Average 60
  10. 10. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comConclusion:The use of Average Temperature failsto be a good indicator of heating andcooling needs.
  11. 11. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comMDT (Mean Daily Temperature):Middle value between daily high anddaily lowTypically it’s the outdoor temperatureat around 11:00 AMCDD=MDT-BPT (when MDT>BPT)HDD=BPT-MDT (when MDT<BPT)DD=0 (when MDT=BPT)
  12. 12. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comwww.WeatherDataDepot.com
  13. 13. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comwww.WeatherDataDepot.comYearly comparison reportChartsExcel and printMonthly dataFAQs
  14. 14. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comHow is Weather Used in EnergyCAP?Building ZIP CodeWeather link to WeatherDataDepotCalendarization & NormalizationCost Avoidance
  15. 15. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWith weather adjustment, $78 savings
  16. 16. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWithout weather adjustment (forunusually mild winter), $352 savings
  17. 17. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comWhy not also adjust for humidity,wind, sunshine, precipitation?Data is expensiveMany fewer available stationsHuge increase in complexityMarginal increase in accuracy
  18. 18. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comGreenhouse GasFundamentals
  19. 19. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comSix gases that have global warmingpotential:Carbon dioxidemethanenitrous oxideChlorofluorocarbons (sulfurhexafluoride, hydrofluorocarbons,perfluorocarbons)
  20. 20. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comGreenhouse Gas FundamentalsMeasured in equivalent metric tons ofCO2 (often shown as CO2e)Metric ton=1,000 kg=2,205 lbsU.S. national average is 20mTon/person/yr
  21. 21. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA’s eGRID Database
  22. 22. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA’s eGRID Database
  23. 23. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA GHG Equivalencieswww.epa.gov/cleanenergy/energy-resources/calculator.htm
  24. 24. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comEPA GHG Equivalencieswww.epa.gov/cleanenergy/energy-and-you/how-clean.html
  25. 25. ©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.comHow is GHG Used in EnergyCAP?MeterBuilding and Organizational rollupsGHG Report
  26. 26. QuestionsVisit the Ace Place to learn more!©2013 EnergyCAP, Inc. @energycap www.EnergyCAP.com
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