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  1. #1

    Calculating Thermal Load

    I manage a 25,000 s.f. facility that has 32 water source heat pumps, which are aggregately metered, but on a separate meter from the main. I am attempting to determine the thermal load of the facility based on the kWh consumed by these units for purposes of estimating the requirement of a CHP unit. Natural gas is easy, but electricity has me a little stumped. Any help, or advice for simple thermal load calcs?

    Thanks.

  2. #2
    Join Date
    Sep 2009
    Location
    Arnold mo
    Posts
    3,957
    Just a quick google got me this. I have no idea if it will help, but it looks like it should:

    http://en.wikipedia.org/wiki/Seasona...ficiency_ratio

  3. #3
    Not exactly, but thanks anyway.

  4. #4
    Join Date
    Feb 2010
    Location
    Cal
    Posts
    1,596
    electrical usage x COP of equipment = btu out put

    your mechanical contractor can walk you thru this and supply the needed wshp info for COP ratings and guidance regarding condenser fouling

    or you can do a detailed load calculation

    or go here:http://www.eng-tips.com/viewthread.c...=265815&page=1

    hilarious! door #2 sucks aye?

  5. #5
    Join Date
    Dec 2006
    Location
    phoenix
    Posts
    106
    Quote Originally Posted by btuhack View Post

    hilarious! door #2 sucks aye?
    Wow !! That's funny, I don't care who you are, that's funny !!

  6. #6
    Join Date
    May 2008
    Location
    Central Pennsylvania
    Posts
    441
    PES001, What do you mean by CHP unit, I guess I'm having a brain fart.

  7. #7
    Join Date
    Feb 2010
    Location
    Cal
    Posts
    1,596
    I think he left. He's refering to cogen. Old ideas are being reapplied to small buildings as it relates to green, LEED, etc.

  8. #8
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,271

    Thumbs up Keep It Simple Simon

    Quote Originally Posted by PES001 View Post
    I manage a 25,000 s.f. facility


    I am attempting to determine the thermal load of the facility based on the kWh consumed by these units for purposes of estimating the requirement of a CHP unit. Natural gas is easy, but electricity has me a little stumped.

    Any help, or advice for simple thermal load calcs?
    KISS

    http://www.trane.com/commercial/dna/view.aspx?i=1136

    http://www.commercial.carrier.com/co...ID1580,00.html
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

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