• 249 views | 6 messages Discussion: LEAP
    Topic: Modelling residential lighting energy requirement in LEAPSubscribe | Previous | Next
  • Anjana Das 3/31/2020

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    Dear colleagues,

    Is it possible to model lighting energy demand in lumen hour and lighting technology with efficiency in lumen/W, so that one can analyse the policy on penetration of efficient lighting technology. Please let kindly me know your suggestion, if one should do in terms of energy or lumen hour ?

  • Charlie Heaps 3/31/2020
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    >>Is it possible to model lighting energy demand in lumen hour and lighting technology with efficiency in lumen/W, so that one can analyse the policy on penetration of efficient lighting technology. Please let kindly me know your suggestion, if one should do in terms of energy or lumen hour ?

    Yes - you will need to specify the lumens as an activity level variable. You will also need another variable to describe the hours of lighting per year. You may want to use a user-defined variable for the hours. Then, you can specify the energy intensity of different light bulbs as kWh/lumen-hr.

    Something like this:

    Activity Level (AL) = Households x Number of Light bulbs/HH x Share of a Particular Type of Light bulb x Hours of Use x Lumens/Bulb = HH x [Bulbs/HH] x [Fraction] x [Hrs] x [Lumens/Bulb] = [Lumen-Hrs]
    Energy Intensity (EI) = KWh/Lumen-hrs

    Energy demand = AL x EI

  • Anjana Das 3/31/2020
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    Thank you Charlie. I am trying a case following your instructions. Thank you so much.
  • Anjana Das 4/1/2020
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    Dear Charlie

    Thank you once again for your help.

    I could manage to get the calculation done correctly for small case, by
    defining number of households, lumens of light per households, duration per
    households at different levels as activity and then defining technology with
    share and energy intensity at the lowest level. But, I wanted to define duration
    per households in hour (LEAP defined as per Lumens of light based on unit of previous activity level (Please see the picture)), however, could not use a non-energy unit, so I defined
    as unspecified. I enclosed the picture, it would be nice if I could use hour,
    it would look correctly.     Please let know if you have better advice.



    I tried to
    use the User Variables, but was not successful. I searched the document LEAPTrainingExerciseEnglish2015
    for some description, but it is not there. It may be a useful feature, so I would be interested to know how to use it. Would be grateful if you could kindly share some
    presentation/materials that explain the User Variables.



    Thanking you in advance

    Best regards

    Anjana


    LEAP.PNG
  • Emily Ghosh 4/1/2020
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    Hi Anjana,

    If you would like to create/add new units, like "hours", refer to the following help page: https://www.energycommunity.org/Help/Supporting_Screens/Units.htm

    To learn how to create User Variables, refer to this webpage: https://www.energycommunity.org/Help/Supporting_Screens/User_Variables.htm

    If you have any other questions, please let us know.

    Thanks,
    Emily

  • Anjana Das 4/1/2020
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    Hi Emily

    Unit worked, now it looks good. I will look into the Users Variable materials.

    Thanks you

    Anjana