Re: [EnergyPlus_Support] how to fix the recurring errors

Jeremiah D. Crossett

CleanTech Analytics

503-688-8951

www.cleantechanalytics.com

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On Sat, Jun 30, 2012 at 1:27 PM, Jia Hu <hujia06@xxxxxxxxx> wrote:

Hi,

I use example file generator and use package unit HVAC system provided by the example file generator. I got many following recurring error, how can I fix this? If necessary I can provide the IDF file. Thank you!

** Warning ** Coil:Cooling:DX:SingleSpeed "PSZ-AC_1:12:12_COOLC 1 DXCOIL" - Full load outlet air dry-bulb temperature < 2C. This indicates the possibility of coil frost/freeze. Outlet temperature = 1.94 C.

** ~~~ ** ...Occurrence info = LONDON/GATWICK - GBR IWEC Data WMO#=037760, 01/15 01:38 - 01:39
** ~~~ ** ... Possible reasons for low outlet air dry-bulb temperatures are: This DX coil

** ~~~ ** 1) may have a low inlet air dry-bulb temperature. Inlet air temperature = 15.542 C.
** ~~~ ** 2) may have a low air flow rate per watt of cooling capacity. Check inputs.
** ~~~ ** 3) is used as part of a HX assisted cooling coil which uses a high sensible effectiveness. Check inputs.

** Warning ** Coil:Cooling:DX:SingleSpeed "PSZ-AC_1:6:6_COOLC 1 DXCOIL" - Full load outlet air dry-bulb temperature < 2C. This indicates the possibility of coil frost/freeze. Outlet temperature = 1.94 C.

** ~~~ ** ...Occurrence info = LONDON/GATWICK - GBR IWEC Data WMO#=037760, 01/15 01:45 - 01:46
** ~~~ ** ... Possible reasons for low outlet air dry-bulb temperatures are: This DX coil

** ~~~ ** 1) may have a low inlet air dry-bulb temperature. Inlet air temperature = 15.542 C.
** ~~~ ** 2) may have a low air flow rate per watt of cooling capacity. Check inputs.
** ~~~ ** 3) is used as part of a HX assisted cooling coil which uses a high sensible effectiveness. Check inputs.

** Warning ** Coil:Cooling:DX:SingleSpeed "PSZ-AC_1:3:3_COOLC 1 DXCOIL" - Full load outlet air dry-bulb temperature < 2C. This indicates the possibility of coil frost/freeze. Outlet temperature = 1.66 C.

** ~~~ ** ...Occurrence info = LONDON/GATWICK - GBR IWEC Data WMO#=037760, 01/15 03:18 - 03:19
** ~~~ ** ... Possible reasons for low outlet air dry-bulb temperatures are: This DX coil

** ~~~ ** 1) may have a low inlet air dry-bulb temperature. Inlet air temperature = 15.556 C.
** ~~~ ** 2) may have a low air flow rate per watt of cooling capacity. Check inputs.
** ~~~ ** 3) is used as part of a HX assisted cooling coil which uses a high sensible effectiveness. Check inputs.