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RE: [EnergyPlus_Support] Outlet Air Relative Humidity Error



Hi Jean, 

yes, like in the project. Do you know whats can be this error?

Thanks

Tecg. Ivan Mezzacapa

Pós Graduado em Engenharia de Produção


Projetos de Ar Condicionado - Consultoria em Eficiência Energética - Simulação Energética

Celular: (11) 99963-9326



To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
Date: Mon, 18 May 2015 14:19:12 +0200
Subject: Re: [EnergyPlus_Support] Outlet Air Relative Humidity Error

 
The information of inputs at the "rating" point have been incorrectly entered. Did you enter "gross" inputs?

Mit freundlichen Grüßen- Sent from my iPhone (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23

On 14.05.2015, at 16:17, "Ivan Mezzacapa ivan_slip@xxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 


Hi everyone, 

i'm simulating a building with all inputs of project, but, this errors persist.

** Severe  ** For object = Coil:Cooling:DX:VariableRefrigerantFlow, name = "ESCRITORIOS:ZN51ESPERA VRF COOLING COIL"
   **   ~~~   ** Calculated outlet air relative humidity greater than 1. 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    = 7.13 C
   **   ~~~   ** ...Inlet Air Humidity Ratio  = 1.125000E-002 kgWater/kgDryAir
   **   ~~~   ** ...Outlet Air Humidity Ratio = 7.510155E-003 kgWater/kgDryAir
   **   ~~~   ** ...Total Cooling Capacity used in calculation = 16400.00 W
   **   ~~~   ** ...Air Mass Flow Rate used in calculation     = 0.556924 kg/s
   **   ~~~   ** ...Air Volume Flow Rate used in calculation   = 0.530000 m3/s
   **   ~~~   ** ...Air Volume Flow Rate per Watt of Rated Cooling Capacity is also out of bounds at = 3.2317073E-005 m3/s/W
   **   ~~~   **  During Warmup, Environment=AGUAI_VERAO, at Simulation time=01/21 00:00 - 00:15
   **  Fatal  ** Check and revise the input data for this coil before rerunning the simulation.

It's possible to adjust air flow rate or capacity to solve this problem, but, if do this the simulation will not be like the project informations.

There are some solutions in model to correct this problem, maintaining the project characteristics?

Thanks for any help.

Tecg. Ivan Mezzacapa

Pós Graduado em Engenharia de Produção


Projetos de Ar Condicionado - Consultoria em Eficiência Energética - Simulação Energética

Celular: (11) 99963-9326




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Posted by: Ivan Mezzacapa <ivan_slip@xxxxxxxxxxx>


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