Yuki's profile - activity

Run .idf file in Parametric Analysis Tool I want to run the XcelEDAReportingandQAQC measure on multiple .idf files. Is t

I am modeling a building that uses DOAS w/ DCV and active chilled beams. The ACB is constant volume and DOAS is variable volume, so I model ACB using FCUs. Now the question is how can I implement DCV in DOAS? I turn the DCV on in the control and the outdoor air seems correct. But the DOAS supply air is not 100% OA. Where can I set the DOAS to be 100% OA while the OA cfm might vary?

I built a model to simulate a water-cool DX unit with water-side economizer. The DX unit is modeled as a unitary water-to-air heat pump with electric reheat, as shown below:

I look into the total clg/htg rate of the unitary HP (purple and orange) and clg/htg rate of its coils (light blue), also the enthalpy of inlet and outlet nodes of the HP (green). These numbers don't make much sense to me. Why the outlet enthalpy is higher than the inlet while the unitary HP total cooling rate is >0 and total heating rate=0? And why the water-to-air HP cooling coil's total cooling rate=0 but the unitary HP's total cooling rate>0?

Thanks in advance.

I have a design using water-cooled CRAC unit in service room with water-side economizer. I simulate the DX cooling using this method, But it gives me following error:

Severe * FindRootSimpleController: Controller error for controller = "CONTROLLER WATER COIL 1" * ~~~ * Environment=NEW YORK LAGUARDIA ARPT ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:00 - 00:15
* ~~~ * Controller function is inconsistent with user specified controller action = Reverse action
* ~~~ * Actuator will be set to maximum action * ~~~ * Controller control type=Temperature
* ~~~ * Controller temperature setpoint = 13.56 [C] * ~~~ * Controller sensed temperature = 22.33 [C] * ~~~ * Controller actuator mass flow rate set to 1.00 [kg/s] * ~~~ ** Controller actuator temperature = 22.35 [C]

Any one has idea what happens?

Thanks in advance!