You don't change the temperatures, you increase the capacity.
DistrictCooling,
Purchased Cooling, !- Name
Purchased Cooling Inlet Node, !- Chilled Water Inlet Node Name
Purchased Cooling Outlet Node, !- Chilled Water Outlet Node Name
100000; !- Nominal Capacity {W}
You can see how this object is operating by including these report variables (rdd file) in your input file.
Output:Variable,Purchased Cooling Inlet Node,System Node Temp,Hourly;
Output:Variable,Purchased Cooling Outlet Node,System Node Temp,Hourly;
Output:Variable,Purchased Cooling Outlet Node,System Node MassFlowRate,Hourly;
After the simulation, open the results file (csv file)
On 11/23/2011 10:50 AM, energyplus.1984 wrote:
Hi All,
I am modelling district cooling and getting the following error.
The model says that the inlet cold water temperature(Actuator temp) is higher than Sensed temperature. In the idf file i am not able to locate where to change these temperatures..
Thanks in advance.
Error is –
Severe ** FindRootSimpleController: Controller error for controller = VAV_1_COOLC_CONTROLLER
** ~~~ ** Environment=CHICAGO ANN CLG .4% CONDNS WB=>MDB, at Simulation time=07/21 00:00 - 00:10
** ~~~ ** Controller function is inconsistent with user specified controller action = "" action
** ~~~ ** Actuator will be set to maximum action
** ~~~ ** Controller control type=Temperature
** ~~~ ** Controller temperature set point = 12.80 [C]
** ~~~ ** Controller sensed temperature = 41.35 [C]
** ~~~ ** Controller actuator mass flow rate set to 5.56 [kg/s]
** ~~~ ** Controller actuator temperature = 41.93 [C]
** ~~~ ** Note: Chilled water coils should be reverse action and the entering chilled
** ~~~ ** water temperature (controller actuator temperature) should be below the setpoint temperature
** ~~~ ** Note: Hot water coils should be normal action and the entering hot
** ~~~ ** water temperature (controller actuator temperature) should be above the setpoint temperature
J
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