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