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Math Help - Efficiencies of Equipment

  1. #1
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    Efficiencies of Equipment

    I am trying to track the efficiencies of equipment I manage for a large Hotel. In year one it is assumed that all equipment is running 100% efficient. As the years go by this same equipment will become less efficient by virtue of aging. I am able to see these inefficiencies in the KW usage. Less efficiency means more kw used. If the equipment was running all the time and with the same ambient outside temperature it would be easy to see these inefficiencies. Heres the problem...A hotel has an occupancy that changes. If the occupancy is directly proportional to Kw usage, then I should still be able to track the inefficiencies through the Kw usage. But outside ambient temperature also affects Kw usage. How do I merge these three variables (Temp, Occupancy & Kw use) into one variable to be tracked. My own limited knowledge is telling me I would end up seeing something like 0 being 100% efficient. After a few years this number will start going down...Year 1 for example will be 0, year 2-0, year 3 -.89, year 4 - .32 so on and so forth...
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  2. #2
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    Quote Originally Posted by sllim0725 View Post
    How do I merge these three variables (Temp, Occupancy & Kw use) into one variable to be tracked.
    Since it is highly unlikely that occupancy affect the ambient temperature, and vice versa, it is highly unlikely that one variable could stand for both.

    You will probably need an equation with many variables, and that equation will probably be determined from many, many data points.
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