Human Energy Behaviors: Using Electricity Over 98% is wasted ! E Bulb = 5% CO 2 E W = ~ 50% ~50% % E C = ~10% Example: Overall efficiency for conversion of fuel energy to lighting= E PP x E T x E Bulb = 1.6% E PP = 0.35E T = 0.90
What is a kWh? Cost (PG&E)…. 11 – 44 cents CO 2 emissions (PG&E): 106 balloons 100 Watt10 hours A measure of electrical energy consumed = 1000 Watt-hours = 1 kiloWatt-hour = 1 kWh
Activity #1: Getting to Know Your Electricity Bill
Electricity Bill 1. Estimate weekly electricity usage: = total kWh / 4 weeks 2. Estimate weekly CO 2 emissions: = total kWh x 106 balloons / 4 wks. 3. Calculate weekly cost of electricity: = total charges / 4 weeks 4. Compare to savings from Observation Worksheet
Daily Device Use Activity Worksheet 2. Fill-in the times when the devices are actually being used 3. Use an X to mark times when you are not using these devices 1. Use a horizontal line to mark times when devices are on in your household
Action Items for Session 3 1. Finalize and work toward your personal low- electricity goal 2. Monitor & record your Observation Worksheet practices during the week 3. Compute your individual & team totals before class (balloons & dollars saved) 4. Estimate gasoline consumption per week
Resources Slides and materials available on Google group: http://groups.google.com/group/lp-climate-action-teams Additional materials: Vocabulary list, supplementary reading….