Re: [EnergyPlus_Support] Weather Data

[Linda Lawrie <linda@xxxxxxxxxx>]

At 10:57 PM 3/28/02, you wrote:
>I have some queries about the interpolations made by program when using 
>hourly weather data and a time step which is less than one hour. Could you 
>please let me know what type of interpolation scheme does the program use 
>( linear , quad etc? ) and if there is any literature which can give some 
>more information regarding this topic.

It's a simple linear interpolation based on current timestep and number of 
timesteps in the hour:

     WeightNextHour = TimeStep/NumOfTimeStepInHour
     WeightThisHour = 1-WeightNextHour

     DryBulb=Drybulb(thishour)*WeightThisHour + 
DryBulb(nexthour)*WeightNextHour

     etc.
     Hours=1...24

    Note that schedules are NOT interpolated.


Linda


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