Hello My Friends, I want to use Openstudio to model the cooling/heating energy consumption of a commercial building that is served by two parallel connected VRF system, but i have some issues with the VRF model. I expect my VRF systems have the following configuration and control logic (but now i cannot figure out how to do that) : 1. The two VRF systems are connected in parallel to serve the same zone, with the capacity of which are sized to 28000W and 16000W respectively. 2. When the cooling/heating load is in the low range, for example 8000W, the smaller VRF will be used while the larger VRF be turned off. 3. When the cooling/heating load is in median range, for example 20000W, the larger VRF will be used while the smaller VRF be turned off. 4. When the cooling/heating load is in high range, for example 40000W, both of the VRFs will be operated. PS: I have investigated the VRF model in Openstudio, and it seems that the the built-in model can only simulate a standalone VFR system and is not able to simulate the control logic i stated above for the parallel connected. Is anyone know the methods that can be used to do this kind of control? Thank you in advance!!!
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