Re: [EnergyPlus_Support] HVAC doubt

[Jaime Zuluaga Machado <jaimezuluagam@xxxxxxxxx>]

Thanks James,

Let me explain what I want to do; I am doing a simulation No looking for an auto-sizing, I just want to know the results of the actual conditions of a building, I get all variables, like internal loads, weather file, construction materials, schedules, and even the HVAC equipment. So I do not know why the program get problem with the Design Day file if I do not want to do with this.

Thanks in advance.

 

Jaime Zuluaga M

---

From: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Thursday, 15 August 2013, 13:30
Subject: RE: [EnergyPlus_Support] HVAC doubt

 

Jaime,

Your main problem seems to be that your DX coil is missing a setpoint.  I run full weather simulations all the time with auto-sizing and do not â??Run Simulation for Sizing Periodsâ??.  Whenever autosizing is used, you must define DesignDays (but the simulation need not include the sizing periods)

 

James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653

 

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jaime Zuluaga Machado
Sent: Thursday, August 15, 2013 12:52 PM
To: EnergyPlus Suppport Yahoo
Subject: [EnergyPlus_Support] HVAC doubt

 

 

Hi!

 

How I do work the HVAC system with the Weather File and no with Design Day.

When i change my Design Day the next error appears:

nput file has requested Sizing Calculations but no Simulations are requested (in SimulationControl object). Succeeding warnings/errors may be confusing.

   ** Severe  ** Sizing: Coil:Cooling:DX:SingleSpeed "OS:COIL:COOLING:DX:SINGLESPEED 1": Rated air volume flow rate per watt of rated total cooling capacity is out of range.

   **   ~~~   ** Min Rated Vol Flow Per Watt=[4.027E-005], Rated Vol Flow Per Watt=[6.997E-005], Max Rated Vol Flow Per Watt=[6.041E-005]. See Input-Output Reference Manual for valid range.

   ** Severe  ** CoilSystem:Cooling:DX: Missing temperature setpoint for DX unit= OS:COIL:COOLING:DX:SINGLESPEED 1 COILSYSTEM

   **   ~~~   **   use a Setpoint Manager to establish a setpoint at the unit control node.

   **  Fatal  ** Previous severe set point errors cause program termination

   ...Summary of Errors that led to program termination:

   ..... Reference severe error count=2

   ..... Last severe error=CoilSystem:Cooling:DX: Missing temperature setpoint for DX unit= OS:COIL:COOLING:DX:SINGLESPEED 1 COILSYSTEM

 

 

 

Jaime Zuluaga M