Question-and-Answer Resource for the Building Energy Modeling Community
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Sorry for the late reply. There is also an example file titled "5zoneWaterSystems" that comes with EnergyPlus that uses rainwater harvesting capabilities. I have run this example file and been unable to find a rhyme or reason to when water flows into the tank (not all times that rain is falling) and out of the tank (not all times that makeup water is being used in the cooling tower). I initially did this using v8.0, then ran the same example file in v8.1 and VOILA, water flow times all correlate to rain fall and makeup water use. I guess chalk this up to a bug that was fixed between versions, and make a note that rainwater harvesting capabilities should only be modeled with v8.1 and above for EnergyPlus.
