Greenhouse Gas Calculations - NorCal
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This spreadsheet was created by Danny Parker (FSEC) as part of the Passive House California (PHCA) workshops on Heat Pump Water Heaters
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Please provide credit to Danny and PHCA when using this resource.
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Date:April 2018
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Hot Water Energy Estimator & GreenHouse Gas Emission Rates
key inputs
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Lbs CO2/kWh
lbs/Therm
$/kWh$/therm
Nat. GasTank
Nat Gas:Tankless
ElecResistance
HPWH
PV_HPWH
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PaloAlto
0.72711.70.191.39EF/UEF0.540.750.843.006.00
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Therms/yr
202.74110.2000
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kWh/yr002885808404
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lbs CO2/yr
237212902098587294
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$Dollars/yr
$282$153$548$153$77
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Energy for Heating Hot Water
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Gallons per Day*
Water T
Hot Water T
Btu/day
kWh/Day
kWh/yr
Therms/day
Therms/yr
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37.858130226516.6424230.302110.2
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Clotheswasher (CW)
Dishwasher (DW)
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Tank Standby Loss
Btu/day
kWh/Day
kWh/yrTotal
Seasonal_EF
Hot Water Draw Influences
Parameter
CW Cycles/yr
DWCycles/yr
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UA tank_Elec
ClothesWasher_gpd
1.9306181
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2.543201.2746228850.84
Dishwasher_gpd
4.1
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Total Occupants
3.0
Energy Star CW?
EnergyStar DW?
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UA_tank_gas
Btu/day
Therms/Day
Therms/yr
Total
Seasonal_EF
Fmix0.65NN
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11190080.25392.5202.70.54Teenagers0.0CW/gpcDW/gpc
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Children1.02.38.2
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Firing Efficiency
VintageFixtures
1.00
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Gas firing efficiency
NatGas Heat Content
Electric Heat Content
Non-demographic GPD
49.3
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0.751000003412
Total Gallons/day
37.8
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Energy Rates
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https://www.cityofpaloalto.org/civicax/filebank/documents/8089
https://www.pge.com/tariffs/index.page
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Data for GHG Calculations
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https://www.pge.com/includes/docs/pdfs/shared/environment/calculator/pge_ghg_emission_factor_info_sheet.pdf
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https://www.cityofpaloalto.org/civicax/filebank/documents/25543/
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Data for Hot Water Gallons per Day
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http://fsec.ucf.edu/en/publications/pdf/FSEC-PF-464-15.pdf
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