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[EnergyPlus_Support] VRF DX cooiling coil, error due to Calculated outlet air RH greater than 1
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] VRF DX cooiling coil, error due to Calculated outlet air RH greater than 1
- From: "JFCS" <jamo0312see@xxxxxxxxx>
- Date: Tue, 20 Nov 2012 13:03:16 -0000
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I am modeling a VRF system with given equipment parameters for "FCU 2B-7 VRF DX COOLING COIL"
how can i compute the "outlet air relative humidity"???
given for FCU 2B-7 VRF DX COOLING COIL:
Rated cooling Capacity=28kw
Rated sensible cooling Capacity=22.3kw
Rated air volume flow rate=1.183m3/s
Rated Condition= Indoor:27CDB/19CWB at Outdoor:35CDB
i'm generating errors as follows:
** Severe ** For object = COIL:Cooling:DX:VariableRefrigerantFlow, name = "FCU 2B-7 VRF DX COOLING COIL"
** ~~~ ** . The combination of
** ~~~ ** rated air volume flow rate, total cooling capacity and sensible heat ratio yields coil exiting
** ~~~ ** air conditions above the saturation curve. Possible fixes are to reduce the rated total cooling
** ~~~ ** capacity, increase the rated air volume flow rate, or reduce the rated sensible heat ratio for this coil.
** ~~~ ** If autosizing, it is recommended that all three of these values be autosized.
** ~~~ ** ...Inputs used for calculating cooling coil bypass factor.
** ~~~ ** ...Inlet Air Temperature = 26.67 C
** ~~~ ** ...Outlet Air Temperature = 13.17 C
** ~~~ ** ...Inlet Air Humidity Ratio = 1.125000E-002 kg/kg
** ~~~ ** ...Outlet Air Humidity Ratio = 9.866411E-003 kg/kg
** ~~~ ** ...Total Cooling Capacity used in calculation = 28000.00 W
** ~~~ ** ...Air Mass Flow Rate used in calculation = 1.615252 kg/s
** ~~~ ** ...Air Volume Flow Rate used in calculation = 1.400000 m3/s
** ~~~ ** During Warmup, Environment=SUMMER DESIGN DAY IN ORTIGAS AVE. GREENHILLS SAN JUAN CITY, at Simulation time=07/15 00:00 - 00:15
** Fatal ** Check and revise the input data for this coil before rerunning the simulation.
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