Re: [EnergyPlus_Support] Re: can't figure out how to fix errors

[Fred Buhl <wfbuhl@xxxxxxx>]

It's pretty unusual to not not have any design cooling loads. The warning message is coming from
the zone sizing calculation. This calculation does not know or care anything about the system or
plant level input. It is strictly a zone level calculation. Thus the problem must be coming from
the zone level inputs. Check your design days and zone level schedules. Make sure the schedules are active
for SummerDesignDay. Anything you are not mentioning - like the building is at the South Pole? Did you check
the Sizing:Zone inputs and make sure the specified "Zone Cooling Design Supply Air Temperature" is less than
your expected zone temperature?

Fred Buhl

On 4/13/2010 9:09 AM, Morss, Greg wrote:

Hello,

Yes I have a sizing object for the zones and the plant.  And yes there are internal gains (people, equip and lights) for all zones.  I am getting the cooling load Warning for each of my 15 zones.  Any idea what to do?

 

Greg

 

---

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of mneves32
Sent: Tuesday, April 13, 2010 2:18 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: can't figure out how to fix errors

 

 

Hello

Some questions:
- Does your zone have a sizing object?
- Does your plant have s sizing object?
- Does your zone have internal gains ?

MN

--- In EnergyPlus_Support@yahoogroups.com, "greg.morss" <gmorss@...> wrote:
>
> Hello,
> I am trying to simulate a 100% Outside air with Heat Recovery system for a project that I am working on, and have fixed all the connection errors that have come up, but now I am getting a large number of warning which are causing the simulation to fail and I cant figure out how to correct them or where to look. The first one is:
> ** Warning ** Calculated design cooling load for zone=CORNER 1 is zero.
> ** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs
>
> and when I check where it recommends, everything looks correct.
>
> The next one is :
> ** Warning ** PlantFlowResolver: Branch flow rates out of bounds, for Plant Loop=HW LOOP, Branch=HW INTERIOR REHEAT COIL BRANCH
> ** ~~~ ** Conditions should be: 0.631 <= 0.132 <= 0.568 Occurrence info=NORMAL, 01/01 00:00 - 00:15
>
> Any ideas where i should start?
>
>
> Thanks
>

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