Hi everyone, here are my specification of chillers that I simulate in EnergyPlus,
I choose Chiller:Electric:EIR as build of CHU-1~2
But I only can choose Chiller:Electric:Reformulated EIR as build of BHU-1~2, because of my evaporator fliud temperatue is below 0℃.When I use Chiller:Electric and Chiller:Electric:EIR to simulate BHU-1~2 it will show error about my evaprator fluid temperature.
Can anyone tell me why? That's my first question.
My second question is about chiller performance curves.
From documentation [EngineeringReference], the topic of Electric ChillerModel Based on Condenser Entering Temperature says there are three curves to determine chiller operation at off-reference conditions. 1) Cooling Capacity Function of Temperature Curve 2) Energy Input to Cooling Output Ratio Function of Temperature Curve 3) Energy Input to Cooling Output Ratio Function of Part Load Ratio Curve
The equation of curve 1 and 2 are same, how come the coefficients are different?
(From DataSet\Chillers.idf)
It also showed in Commercial Buildings Energy Modeling Guidelines & Procedures (MGP) chapter 6.8.2 CHILLERS
link text
I have the same question about different coefficients problem in Electric ChillerModel Based on Condenser Leaving Temperature in [EngineeringReference].
If there is any response, then I would be very grateful.
Sincerely, Yueh-Chin
