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[EnergyPlus_Support] Re: DX coils consistency with ASHRAE 9.1-2007 Tab6.8.1A for a Baseline VAV system 5 with reheat
Thank you Jean for the reply.
That is what I suspected. About this this I have one or two more doubt.
I can't figure how to calculate the gross COP to make the standard rated net cop to be consistent with ashrae limitations.
The easiest way is to set up a parametric analisys to find the correct net COP varing the gross COP, but I found that also !- Rated Evaporator Fan Power Per Volume Flow Rate {W/(m3/s)} set at the default 773.3 has an effect on net COP as well as on SEER and IEER.
The I/O ref seems to suggest only to change the 773.3 to obtain pvorrect values for SEER and IEER. In this way the parametric analisys shoul be performed with 2 parameters.
In my opinion this should not be the best way to solve the problem because it implies a sort of "blindness".
Looking for an help I found some examples on ASHRAE 90.1 user manual (examples 11-C and G-G) in which there are showed the calculation which involves the net and gross COP. Even if I found that the same calculations can be repeated using data reported in the html file ans obtaining analitically in this way net or gross cop, those calcs are performed not using user input from the idf.
I don't know if I have been clear in the previous description, but my question is this... in which way should I set the gross cop? Which approach should I follow? In which way should I manage the input !- Rated Evaporator Fan Power Per Volume Flow Rate? Must I satisfy the consistency of IEER an SEER?
Thanks
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Posted by: telemar87@xxxxxxxxx
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