Household Energy(Gas Heat)Household Energy(Gas Heat)
My house-November 173 “therms”My house-November 173 “therms”
–$0.45 per day–$0.45 per day
–$0.39 per therm for first 29 therms–$0.39 per therm for first 29 therms
–$0.22 per therm for next 39 therms–$0.22 per therm for next 39 therms
–$1.36 per therm delivery charge–$1.36 per therm delivery charge
–Total Cost is $266–Total Cost is $266
What is a therm?What is a therm?
ThermTherm
=100,000 British Thermal Units (BTU)=100,000 British Thermal Units (BTU)
~100 cubic feet of natural gas at standardtemperature and pressure~100 cubic feet of natural gas at standardtemperature and pressure
29.3 kilowatt-hours29.3 kilowatt-hours
1 therm = 0.80 gallons of gasoline1 therm = 0.80 gallons of gasoline
–173 thems = 138 gallons of gasoline–173 thems = 138 gallons of gasoline
1 therm ~ 11 pounds of dry wood1 therm ~ 11 pounds of dry wood
Household Energy(Electricity)Household Energy(Electricity)
1542 kilowatt-hours1542 kilowatt-hours
–Delivery charges $0.065 per kWh–Delivery charges $0.065 per kWh
–Generation charges $0.108 per kWh–Generation charges $0.108 per kWh
Total Cost=$333Total Cost=$333
1542 kwh=42 gallons of gasoline1542 kwh=42 gallons of gasoline
How much energy does it take topower a human?How much energy does it take topower a human?
2000 Calories per day2000 Calories per day
365 days per year365 days per year
730,000 Calories = 23 gallons ofgasoline per year730,000 Calories = 23 gallons ofgasoline per year
–Or about 600 miles driven–Or about 600 miles driven
Energy UsageEnergy Usage
Figure by UMB OpenCourseWare
Energy UsageEnergy Usage
Industrial (Facilities used for producing and processing goods.)Industrial (Facilities used for producing and processing goods.)
–22% chemical production–22% chemical production
–16% petroleum refining–16% petroleum refining
–14% metal smelting/refining–14% metal smelting/refining
Transportation (Vehicles which transport people/goods)Transportation (Vehicles which transport people/goods)
–61% gasoline fuel–61% gasoline fuel
–21% diesel fuel–21% diesel fuel
–12% aviation–12% aviation
Residential (Living quarters for private households.)Residential (Living quarters for private households.)
–32% space heating–32% space heating
–13% water heating–13% water heating
–12% lighting–12% lighting
–11% air conditioning–11% air conditioning
–8% refrigeration–8% refrigeration
–5% electronics–5% electronics
–5% wet-clean (mostly clothes dryers)–5% wet-clean (mostly clothes dryers)
Commercial (Service-providing facilities and equipment (businesses,government, etc)Commercial (Service-providing facilities and equipment (businesses,government, etc)
–25% lighting–25% lighting
–13% heating–13% heating
–11% cooling–11% cooling
–6% refrigeration–6% refrigeration
–6% water heating–6% water heating
–6% ventilation–6% ventilation
–6% electronics–6% electronics
Energy Homework (2 pts)Energy Homework (2 pts)
1.) Find your household Electricity and Heating(oil, natural gas, or propane).  Determine yourannual energy usage per household.1.) Find your household Electricity and Heating(oil, natural gas, or propane).  Determine yourannual energy usage per household.
–Note: If you rent and do not pay your own utilities, tryto find this from your landlord.  If not available, find thisnumber for the average American.–Note: If you rent and do not pay your own utilities, tryto find this from your landlord.  If not available, find thisnumber for the average American.
2.) Convert the total energy usage (for electricaland for heat) to gallons of gasoline (US) usingthe following website:2.) Convert the total energy usage (for electricaland for heat) to gallons of gasoline (US) usingthe following website:
3.) Estimate how much energy your householdcould realistically conserve.3.) Estimate how much energy your householdcould realistically conserve.
Images removed due to copyright restrictions.