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[EnergyPlus_Support] Solar Collectors
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Solar Collectors
- From: "ebcox" <ebcox@xxxxxxxxx>
- Date: Tue, 26 May 2009 20:03:30 -0000
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- Delivery-date: Tue, 26 May 2009 14:03:44 -0600
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I have a question about the SolarCollectorFlatePlateWater example.
I ran it unaltered with the Chicago O'Hare TMY2 .epw weather file. I read the .CSV output into Excel and I'm comparing column L (STORAGE TANK:Water Heater Source Rate) against column AA (Collector1:Solar Collector Heat Transfer Rate) multiplied by 6 (there are 6 collectors). The value for timestep July 01, 8:30 AM is 6620 for the former, 3770 for the latter. Going forward through the time steps, the values become fairly close but not nearly identical.
I would expect from conservation of energy that the heat energy going into the tank would equal the heat energy leaving the collectors. What do I not understand about Energy Plus?
Thanks!
Edwin Cox
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