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Sequential load distribution scheme seems not working

asked 2017-11-12 06:45:00 -0600

katsuya.obara gravatar image

updated 2017-11-13 19:23:18 -0600

I am modelling with multiple water cooled chiller in energyplus.
In idf file, I specified SequentialLoad for Chilled Water Distribution Scheme. However, looking at the result, it seems that multiple chiller is operating before 1 chiller get to full load as shown below graph.(x:part load ratio/y:COP)
image description
Does anyone know why this happen?

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answered 2017-11-16 21:08:15 -0600

Your question is too broad, and there is not enough information provided, to provide a concise answer. There are a number of things you can check - What capacity does each chiller have - have you autosized the chillers using a 'Sizing Factor' set at the default of 1? - The chart presented is not a good choice for the question you've posed - to definitively say that more chillers are operating than you expect at any given time step, you need to plot the time series on the x axis. (it is a nice looking chart though !) - The chillers may not get to 'full load' at every time step. the capacity of the chiller will vary as the condenser water and chilled water temperatures vary, so they may be operating at max. available capacity - look into the CW temperatures and CHW temperatures at unexpected operating PLR/COPs

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Asked: 2017-11-12 06:45:00 -0600

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Last updated: 16 hours ago