[EnergyPlus_Support] Modeling Degradation of a VAV System Using EnergyPlus

["noelcrrl" <noelcrrl@xxxxxxxxx>]

Hi.  I am trying to model a VAV HVAC system and study its performance 
as a function of time.  In essence, I am trying to model the 
degradation of a HVAC system over time.  I am aware that EnergyPlus is 
limited and in some ways not capable of simulating the degradation of 
an HVAC in terms of performance and efficiency. However, would it be 
possible to input a defined efficiency versus time curve into 
EnergyPlus that would represent the HVAC system efficiency as a 
function of time?  If this is possible, what process should I follow 
to accomplish this?  Also, is this the right approach or should I go 
about this another way?  And finally, is there a resource that I could 
tap into that would have a number of efficiency versus time curves 
that could be helpful.  

Thanks in advance for your help!






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