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    ROI-TCO labs

    ROI/TCO lab

    1. The PV panel we tested in class produces 165 Watts in ideal sunlight. The cost for this panel today is about $0.50 per Watt
    2. Calculate the price for this panel
    3. If this panel collects 5.5 hours of sunlight per day, how many kWh does it produce each day?
    4. At $0.40 per kWh, how much money does this panel harvest each day?
    5. Divide the price by the amount collected per day, this should give you the number of days needed to pay off the panel.
    6. How many days or years is this? This is called ROI or return on investment.
    7. Total cost of ownership (TCO) is the total cost of operating the system. If the system lasts 25 years, how much money would it produce?
    8. Subtract the cost of the unit from the money the unit produced, the result is the TCO, or total cost of ownership. If this is negative, you made money on the system.
    9. Repeat these steps with the following data:

    Solar PV panel:

    • $0.50 per Watt
    • 165 Watts
    • 5.5 hours per day production
    • lifespan 25 years
    • ROI:
    • TCO:

    Solar thermal panel:

    • 2.5 m2 area
    • 1500 W/m2 solar insolation
    • 5.5 hours per day
    • cost: $900
    • lifespan: 30 years
    • ROI:
    • TCO:

    Wind turbine:

    • 2 kW output
    • 8 hours per day (night time too)
    • cost: $10,000
    • lifespan: 5 years
    • ROI:
    • TCO:

    check your answers:

    PV

    • $0.36 per day
    • 230 days or .63 years or 7.6 months
    • $-3202

    solar thermal

    • $20.62 per day
    • 43 days or 0.11 years, or 1.5 months
    • $-224889

    wind

    • $6.40 per day
    • 1562 days or 4.3 years, or 4 years 4 months
    • $+656 (note cost of device)

    PPA array lab

    1. Look up the power produced by the PPA array here: http://10.14.8.1
    2. Look for PPA gen/use
    3. Look up the solar radiation for the same time here: http://10.14.62.5
    4. go out and measure the effective size of each panel, and count the panels
    5. find the total area of the array in m2
    6. multiply the solar radiation (insolation) by the area to get ideal power capacity
    7. divide the actual power by this number to get % efficiency

    Lab questions:

    1. A solar panel is 2m x 1.5 m and collects 120 Watts in solar radiation of 1000 W/m2. What is the efficiency?
    2. How much heat energy could we collect from a solar thermal panel 3m x 2m in 1500 W/m2 solar insolation?
    3. What are the three clues we can use to detect energy use on a telemetry system like elab2?
    4. What impacted you the most about the e2 film about the Grameen Bank?
    5. Energy storage and efficiency are keys to the ROI and TCO of the devices above. Explain.
    6. Why would the nasty numbers for the wind turbine be offset by the high price of electrical energy storage?
    7. Storing 15 kWh of energy as hot water using a well insulated hot water tank costs $1000. How much is this per kWh?
    8. About how many hours can this store the energy (stay hot)?
    9. Lithium storage batteries like those in the student union now cost $500/kWh for a 10 kWh system. How much did this cost?
    10. How long can this store the energy?
    11. Why is insulating a hot water heater so important?


    Comments

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You should be able to do the following after logging in with your account: To create a new page, click the ...Falseadmin2020-08-19T15:43:59+00:00adminadmin2013-02-05 02:24:03+00:002013-02-05 02:24:03updated4Added tag - hotadminadmin2013-02-05 02:24:02+00:002013-02-05 02:24:02addTag3adminadmin2013-02-05 02:05:35+00:002013-02-05 02:05:35updated2First createdadminadmin2013-02-05 02:03:35+00:002013-02-05 02:03:35created1wiki2013-02-05T02:24:03+00:00groups/apenvironmentalscience/wiki/394a8FalseEnergy notes/groups/apenvironmentalscience/wiki/394a8/Energy_notes.htmladmin4 updatesEnergy notes Week of 2.4.13: energy wrap-up e2 video: coal vs. nuclear in class AP exams: FRQ 2002.1 2004.2 2006.1 2007.2 2008.1 ...Falseadmin2013-02-05T02:24:03+00:00adminadmin2013-02-05 02:23:20+00:002013-02-05 02:23:20updated6Added tag - hotadminadmin2013-02-05 02:23:18+00:002013-02-05 02:23:18addTag5adminadmin2013-02-05 02:23:12+00:002013-02-05 02:23:12updated4adminadmin2013-02-05 02:21:48+00:002013-02-05 02:21:48updated3adminadmin2013-02-05 02:20:26+00:002013-02-05 02:20:26updated2First createdadminadmin2013-02-05 02:06:00+00:002013-02-05 02:06:00created1wiki2013-02-05T02:23:20+00:00groups/apenvironmentalscience/wiki/c360bFalseFeb-May plan/groups/apenvironmentalscience/wiki/c360b/FebMay_plan.htmladmin6 updatesFeb-May plan 1. conclusion of energy chapters (see previous wiki) 2. GCC AP questions FRQ: 2006.2 2005.3 2005.4 2007.3 ...Falseadmin2013-02-05T02:23:20+00:00adminadmin2012-03-07 05:53:55+00:002012-03-07 05:53:55updated14adminadmin2012-03-07 05:43:38+00:002012-03-07 05:43:38updated13adminadmin2012-03-07 05:41:35+00:002012-03-07 05:41:35updated12adminadmin2012-03-07 05:38:57+00:002012-03-07 05:38:57updated11Added tag - hotadminadmin2012-03-07 05:38:55+00:002012-03-07 05:38:55addTag10adminadmin2012-03-07 05:36:47+00:002012-03-07 05:36:47updated9adminadmin2012-03-07 05:22:26+00:002012-03-07 05:22:26updated8adminadmin2012-03-07 05:20:01+00:002012-03-07 05:20:01updated7adminadmin2012-03-07 05:18:58+00:002012-03-07 05:18:58updated6adminadmin2012-03-07 04:58:55+00:002012-03-07 04:58:55updated5adminadmin2012-03-07 04:57:33+00:002012-03-07 04:57:33updated4adminadmin2012-03-07 04:56:53+00:002012-03-07 04:56:53updated3adminadmin2012-03-07 04:54:20+00:002012-03-07 04:54:20updated2First createdadminadmin2012-03-07 04:53:33+00:002012-03-07 04:53:33created1weblog2012-03-07T05:53:55+00:00groups/apenvironmentalscience/weblog/de030FalseGreen Apple/groups/apenvironmentalscience/weblog/de030/Green_Apple.htmladmin14 updatesGreen Apple Team, Please watch this video about NYC: Trailer: http://www.pbs.org/e2/episodes/101_the_green_apple_trailer.html On the server: http://physics.hpa...Falseadmin2012-03-07T05:53:55+00:00adminadmin2011-09-13 19:08:24+00:002011-09-13 19:08:24updated4Added tag - hotadminadmin2011-09-13 19:08:22+00:002011-09-13 19:08:22addTag3adminadmin2011-09-13 19:08:10+00:002011-09-13 19:08:10updated2First createdadminadmin2011-09-13 19:04:30+00:002011-09-13 19:04:30created1weblog2011-09-13T19:08:24+00:00groups/apenvironmentalscience/weblog/4ecddFalseQuestions for Wednesday, wiki adds/groups/apenvironmentalscience/weblog/4ecdd/Questions_for_Wednesday_wiki_adds.htmladmin4 updatesQuestions for Wednesday, wiki adds Team, I'd like to try something for class tomorrow: each of you to create a question from chapter 3, and email it to me by this evening (Tuesday). 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