Energy blogs

  • Dbrodt
    9 Jun 2014 - 13:54 by Dbrodt

    If you are interested in Energy Systems Integration and you want to find out more about a group forming to share data and information about energy systems integration, then check out the new web site.  The National Renewable Energy Lab is managing this site.  Learn more about what NREL is doing related to energy systems integration at:

  • Allandaly
    13 May 2014 - 12:49 by Allandaly
    Utility Rate

    Hi again,

    I feel like the squeaky wheel here ... apologies for that ... but I am trying to figure out if/how to use this great resource.

    I'm interested in the California PG&E E-19 rate structure. As I understand things right now, there are two issues/problems where the E-19 rate does not fit into the current schema.

    1) The demand charges for this structure consist of three separate line-items each month. Here's what the official E-19 documentation says.

    This schedule has three demand charges, a maximum-peak-period demand
    charge, a maximum part-peak-period and a maximum-demand
    charge. The maximum-peak-period-demand charge per kilowatt applies to
    the maximum demand during the month’s peak hours, the maximum partpeak-
    period demand charge per kilowatt applies to the maximum demand
    during the month’s part-peak hours, and the maximum demand charge per
    kilowatt applies to the maximum demand at any time during the month. The
    bill will include all of these demand charges.

    So the 'maximum' demand charge overlaps 'maximum peak period' and the 'maximum part-peak period' charges.

    It seems to me that the way you currently have the demandweekdaysschedule and demandweekendsschedule fields set up that there is no ability for two demand period tier rates to apply to the same hour. Am I understanding this correctly?

    2) The time periods for this rate are defined as follows.

    SUMMER Period A (Service from May 1 through October 31):
    Peak: 12:00 noon to 6:00 p.m. Monday through Friday (except holidays)
    Partial-peak: 8:30 a.m. to 12:00 noon Monday through
    AND 6:00 p.m. to 9:30 p.m. Friday (except holidays)
    Off-peak: 9:30 p.m. to 8:30 a.m. Monday through Friday
    All day Saturday, Sunday, and holidays
    WINTER Period B (service from November 1 through April 30):
    Partial-Peak: 8:30 a.m. to 9:30 p.m. Monday through Friday (except holidays)
    Off-Peak: 9:30 p.m. to 8:30 a.m. Monday through Friday (except holidays)
    All day Saturday, Sunday, and holidays 
    The current schema does not seem to be able to capture the 8:30 am and 9:30 pm start/end times. You currently only allow for on-the-hour rate assignments. Again, am I seeing this correctly?
    Do the upcoming schema changes address these issues?
    Thanks for your help.
    3 comment(s)
  • Allandaly
    13 May 2014 - 11:59 by Allandaly
    Utility Rate

    Hi again,

    Thank you for your help so far. Do you have an example function that you can post that uses the data in the URDB format that you can post that calculates the hourly/daily/monthly (whatever) utility cost? This would help greatly in understanding the schema format and the intent behind the different fields.

    Any language would be fine for this code --> c, c++, python, java ...

    Thanks again.


  • Allandaly
    9 May 2014 - 13:48 by Allandaly
    Utility Rate


    I'm new to the group and looking forward to using the URDB API for a web-based energy-efficiency applicaiton I am building. I would like to understand the schema of the URDB so I can make sense of the data that is returned through the API in JSON format. I spent a bit of time looking around, but I could not find any documentation of the fields / schema for the database. Apologies if I just missed it and did not dig far enough ... but ... is that available somewhere here?

    Thank you.


    2 comment(s)
  • NickL
    2 May 2014 - 15:06 by NickL

    Challenge participants can submit their challenge documents in this group.  

    Use the following steps to submit challenge related materials:

    1. Join the group
    2. Use Create Content option (upper right corner of group page)
      • Select type = Document
      • Create
    3. This will generate a new form used to create your document.
      1. Give your document submission a title, including your group name(s) and submission type
        • example: Nick Langle Final Submission
      2. Enter tags
        • Geothermal Area name
        • School Name
      3. Add context to the body
        • Enter any other necessary details regarding your submission, this field is optional
      4. Attach files
        • This option is at the bottom of the form
        • Use the Choose File button to select your document
          • Note the file size and file type restrictions
        • Attach the document using the Upload button
        • Repeat this step as needed for additional documents
      5. Save
        • The save button is in the bottom left of the create document form
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