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  1. #14
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    5,997

    GREEN HEAT the SpeedWay

    Quote Originally Posted by motoguy128 View Post
    In those rates, I don't know if you factored in that with electric resistance or hydronic bakc-up the HP keep running and generates heat, so the ocmposite COP is >1, WIth a dual fuel, it's either/or, so you don't get to run the heat pump while the furnace is running.

    For example, with a Carrier Greenspeed heat pump, it's optimized for capaicity and according to data sheets actually has a lower COP <40F than a Infinity 16 or 19 heat pump. However, it produces a lot of capacity, so it won't need the heat strips nearly as much, so the overall effciency is much much higher.
    The power level is increased to provide a somewhat level heat output.

    Greenspeed 4 ton added to graph.

    It sure limits any significant need for Aux Heat.!
    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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