APES_personalenergyaudit

docx

School

University Of Georgia *

*We aren’t endorsed by this school

Course

42706270

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

docx

Pages

Uploaded by ProfPencil1619

Personal Energy Audit Lab In this lab you will use your understanding of energy consumption and energy conversions to evaluate your personal energy use and compare that to the total use in your household per month, as determined by a recent energy bill. 🧪 Lab Supplies: Energy Bill/s for your household. 🧪 Ask your parent/guardian to review your energy provider bill/s for the total kWh (or other unit) of energy used in any ONE month this year for your entire household. Record this in the table below (add rows if needed). Research and record the source of the energy, too. (coal, natural gas, nuclear, etc.) Example provided below. Month/Year Company/Source of Energy Total energy (kWh) used in that month March 2023 Georgia Power/Natural Gas 623 kWh January 2022 Georgia Power/ Natural Gas 1,059 kWh Part 1: Personal Electrical Use Survey Make a hypothesis about how much energy you believe you use daily. Your units for this prediction will be in kWh/day. Type this below: I hypothesize that I personally use around 25kWh/day on a daily basis with all of the appliances I use and the amounts in which I use them. Part 2: Personal Electrical Use Survey In the table below, perform the following actions: 1. Record the total amount of time you use each appliance in one day (#hours/day ). Pro-rate (estimate daily use for) any that you use a few times a week or less. 2. Convert the watts (W) of power to kilowatts (kW) . Hint: 1000W = 1kW 3. Multiply kW by the time used (h) to get kWh/day . 4. Add the names of TWO additional electrical appliances to the bottom of your list. Record the #hours/day for those appliances. You must determine the watts for those two appliances by looking at the appliance label and multiplying the volts by the amps. (volts x amps = watts) 5. Ensure your table is complete. Sum the final column to determine your total daily energy use (kWh/day) . Show all calculations within the table. An example is shown for Room AC that you should delete/replace. Appliance Power (W) Power (kW) #hours/day (h) Energy/day (kWh/day) Room AC 1360 1360/1000 = 1.36kW 4h 1.36x 4 = 5.44kWh/day Clothes washer 512 512/1000 = .512kW 1h .512 x 1 = .512kWh/day Clothes dryer 5000 5000/1000= 5kW 1h 5 x 1= 5kWh/day Dishwasher 1200 1200/1000= 1.2 kW 1h 1.2 x 1= 1.2kWh/day Refrigerator 795 795/1000= .795kW 4h .795 x 4 = 3.18 kWh/day Blender 300 300/1000 = .300 0h .3 x0= 0 kWh/day Coffeemaker-Drip 1100 1100/1000= 1.10 0h 1.1 x 0= 0 kWh/day Food Processor 370 370/1000= .30 kW 0h .3x0 = 0 kWh/day Hot plate 1200 1200/1000= 1.2kW 0h 1.2x0 = 0 kWh/day Microwave oven 750 750/1000= .750kW 0.5h .75x0.5 = 0.375

Mixer 150 150/1000= .150kW 0h .15x0 = 0 kWh/day Toaster 1100 1100/1000= 1.10 .1h 1.1x0.1 = 0.11 kWh/day Computer 60 60/1000= .060kW 5h 0.06x5 = 0.3 kWh/day Radio 70 70/1000= .070kW 0h 0.07x0 = 0 kWh/day Television 90 90/1000= .090kW 5h 0.09x5 = .45 kWh/day Stereo 125 125/1000= .125kW 2h 0.125x2 = .25 kWh/day Ceiling Fan 65 65/1000= .065kW 3h 0.065x3. = 0.195 kWh/day Window fan 200 200/1000= .200kW 0h 0.2x0 = 0 kWh/day Hair dryer 1200 12000/1000=12kW 0h 1.2x0 = 0 kWh/day Iron 1100 1100/1000= 1.1kW 0h 1.1x0 = 0 kWh/day Vacuum cleaner 650 650/1000= .65kW 0.05h 0.65x0.05 = 0.0325 Incandescent light bulb (@75W) 75 75/1000= .075kW 0h 0.075x0 = 0 kWh/day LED light bulb 9 9/1000= .009kW 5h 0.009x5 = 0.045 Dehumidifier 240 240/1000 = .24kW 2h 0.24x2 = 0.48kWh/day LED Christmas lights 5 5/1000 = .005kW 24h 0.005x24 = .12kWh/day TOTAL (kWh/day): 19.0495 kWh/day Part 3: Energy Audit Analysis Complete the following analysis questions. Use the following energy conversion factors to help you with the problems that follow. To receive full credit, you must show all work. Circle your answers. You may handwrite equations or use the equation editor in Word. Energy Conversion Factors 1 Btu = 2.93 x 10 -4 kWh 1 barrel (40 gallons) oil = 5.6 x 10 6 Btu = 5.91 x 10 9 J 1 kWh = 3.42 x 10 3 Btu 1ft 3 natural gas = 1,030 Btu = 1.09 x 10 6 J 1 pound bituminous coal = 12,000 Btu 1 g 235 U = 4.0 x 10 7 Btu = 4.22 x 10 10 J 12,000 Btu = 3.52 kWh = 1.27 x 10 7 J 1. You calculated your personal energy use per day in the table above. How much do you use each year ? Show all work and units. 19.0495kWh/day x 365 days/year = 6,953.0675kWh/year 2. Which non-renewable energy source does most of your household energy come from (check ONE): ___ natural gas (if you check this, skip #3) ___ nuclear ___ coal 3. (Skip if you check natural gas in #2) If you primarily use nuclear or coal energy, calculate how many cubic feet of natural gas is needed to support your lifestyle per year (use your answer to #1 and the Energy Conversion Factors above). Show all work and units. 4. Estimate your family’s yearly energy use based on your answer to #1 or #3. (Multiply #1 or #3 by the number of people in your family). Show all work and units.

6,953.0675kWh/year x 2 people = 13,906.135kWh/year 5. Determine the kWh/year using your monthly bill. Show all work and units. 1059kWh/month x 12 months/year = 12,708 kWh/year 6. Compare your personal energy estimate (#4) with your monthly energy bill (#5). Calculate is the percent difference? Show all work and units. My personal energy estimate for my family’s yearly energy usage was higher than the estimate calculated with the monthly bill. [13906.135 kWh/year−12708 kWh/year×100=9.00375%] (13906.135 kWh/year+12708 kWh/year) Percent Difference: Difference in kWh/year estimates 7. Explain one or more reasons for the difference in #6. One reason that could have caused the difference in the two yearly energy use estimates calculated in #6 could be the AC in our house is more efficient than the given wattage value provided in the chart. Additionally, we use the AC much less in the winter months than the summer months and the base monthly value listed in Part 1 was from January, so our yearly energy usage resulting from the AC could be higher than the amount calculated into the January energy bill. 8. How could we have redesigned this energy audit to account for the difference in #6? This audit could have been redesigned by making each student look up and find the exact wattage for each of the listed appliances that they have in their home since some appliances can have a higher or lower wattage output than what is listed in the chart. Part 4: Lab Conclusion I refute my hypothesis regarding my daily energy use because I used less energy per day than I originally hypothesized. Based upon my energy audit, I use around 19kWh/day, but I hypothesized that I used around 25kWh/day. I believe that this difference is significant enough to justify the refutation of my hypothesis, and additionally, if I did use around 25kWh/day my personal yearly energy use would be 9,125kWh/year and would significantly increase the percent difference between my energy audit and the estimate derived from the monthly bill I sourced. One way that I can decrease my electrical use is to reduce my hot water usage by taking shorter showers and washing my clothes with warm/cool water instead of hot water. Additionally, my family could reduce our overall electrical use by installing energy efficient windows. Energy efficient windows can reduce the total AC and Heating electrical usage by 10-20% every year (Energy Sage, 2022). Another way that my family can decrease our electrical use is to be mindful of the amount and number of lights that are used daily. We have lots of windows in our house, so we can use sunlight instead of using unnecessary electrical energy by turning on lights. This can significantly reduce the electrical energy we use on a regular basis which can lower our monthly and yearly usage. One possible alternative source of renewable energy that my family could use to generate electrical power for our home is solar power. Since we are out in the country, we have the space and unobstructed land to install solar panels that would be able to generate power for our home. Solar energy would be the most viable source of alternative energy because we are not close to a water source that could be used to source energy by tidal or hydroelectric means. Solar panels are low in maintenance which makes them economically efficient in the long- term, and solar energy is a stable and reliable energy source so we would be able to generate enough energy for our home with ease which reduces the stress we cause on the environment. Additionally, solar panels do not release chemicals into the atmosphere or toxins into the ground which makes them ecologically and environmentally friendly and sustainable. Cite any sources used in this section and provide references. Power Consumption of Typical Household Appliances . (2021). Daft Logic. Retrieved February

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

25, 2022, from https://www.daftlogic.com/information-appliance-power- consumption.htm Energy Conservation: 15 Ways to Save Energy | EnergySage . (2022, February 21). Energy Sage. Retrieved February 25, 2022, from https://www.energysage.com/energy- efficiency/101/ways-to-save-energy/