I have a design which has a very specific sequence of operation on its waterside economizer. In short there is an outdoor dry bulb temperature when the hydronic economizer can active (anything below 38°F) and when the economizer is operating the chiller is off. Also when the hydronic economizer is working the cooling tower condenser water temperature is allowed to go below its specific boundary for chiller operation.
Does anyone know 1. If there is a control to turn the chiller off in EnergyPlus when the economizer is working? 2. if there is a control that will allow me to control the condenser water temperature when the chiller is operating and a completely different set of controls on the condenser water temperature when the hydronic cooling tower is working?
I am assuming if these controls do not exist then I will need to write some EMS. If this is the case and anyone has experience with writing these I would certainly appreciate pointers for this case.
