[EnergyPlus_Support] Re: ** Warning ** Calculated design cooling load for zone=EXISTINGWORKSHOP:ZONE1 is zero.

** Warning ** Output:PreprocessorMessage="ExpandObjects" has the following Warning conditions:

** ~~~ ** The value ConstantFlow is not a valid choice for object:

** ~~~ ** HVACTemplate:Plant:ChilledWaterLoop with the name: Chilled water loop and

** ~~~ ** field: Chilled Water Pump Configuration

************* Beginning Zone Sizing Calculations

** Warning ** Site:GroundTemperature:BuildingSurface: Some values fall outside the range of 15-25C.

** ~~~ ** These values may be inappropriate. Please consult the Input Output Reference for more details.

** Warning ** Calculated design cooling load for zone=EXISTINGWORKSHOP:ZONE1 is zero.

** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.

************* Beginning Plant Sizing Calculations

** Warning ** In calculating the design coil UA for Coil:Cooling:Water NEWWAREHOUSE:ZONE1 COOLING COIL

** ~~~ ** the apparatus dew-point is below the coil design inlet water temperature;

** ~~~ ** the coil outlet design conditions will be changed to correct the problem.

** ~~~ ** The initial design conditions are: Tair,in = 25.4717

** ~~~ ** Wair,in = 1.093345E-002

** ~~~ ** Twater,in = 7.2200

** ~~~ ** Tair,out = 14.0000

** ~~~ ** Wair,out = 8.000000E-003

** ~~~ ** The revised design conditions are: Tair,out = 12.6116

** ~~~ ** Wair,out = 8.560853E-003

** Warning ** The design coil load is zero for Coil:Cooling:Water EXISTINGWORKSHOP:ZONE1 COOLING COIL

** ~~~ ** The autosize value for max water flow rate is zero

** Warning ** Chiller:Electric:EIR = DOE-2 CENTRIFUGAL/5.50COP: Integrated Part Load Value (IPLV) cannot be calculated.

** ~~~ ** Check limits in Cooling Capacity Function of Temperature Curve , Curve Type = BIQUADRATIC, Curve Name = DOE-2 CENTRIFUGAL/5.50COP COOLINGCAPACITY DOE-2 CENTRIFUGAL/5.50COP CAPFT

** ~~~ ** Check limits in EIR Function of Temperature Curve, Curve Type = BIQUADRATIC, Curve Name = DOE-2 CENTRIFUGAL/5.50COP ENERGYINPUTRATIO DOE-2 CENTRIFUGAL/5.50COP EIRFT

************* Testing Individual Branch Integrity

************* All Branches passed integrity testing

************* Testing Individual Supply Air Path Integrity

************* All Supply Air Paths passed integrity testing

************* Testing Individual Return Air Path Integrity

************* All Return Air Paths passed integrity testing

************* No node connection errors were found.

************* Beginning Simulation

** Warning ** ControlCompOutput: Maximum iterations exceeded for ZoneHVAC:FourPipeFanCoil = EXISTINGWORKSHOP:ZONE1 FAN COIL

** ~~~ ** ... Load met = -115.50579 W.

** ~~~ ** ... Load requested = -115.29693 W.

** ~~~ ** ... Error = 0.18114984 %.

** ~~~ ** ... Tolerance = 0.10000000 %.

** ~~~ ** ... Error = (Load met - Load requested) / MAXIMUM(Load requested, 100)

Jeremiah D. Crossett

CleanTech Analytics

503-688-8951

www.cleantechanalytics.com

This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics

On Tue, Jul 3, 2012 at 11:31 PM, CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx> wrote:

Hello,
I have this model I just got to the final touches stage and something strange that I can not figure out what the issue is..

So the model shows zero cooling consumption and zero cooling load size for one zone-( ExistingWorkshop )  but not for others -

Also this zone has the highest cooling load of the building- as it is a manufacturing production area.

I see the advise of the warning-to check thermostats and sizing and have not found the issue. I have tried to use an ideal loads system to see if it was an HVAC issue and am using the same construction set for both.

I have pasted the key warnings below and attached the IDF... Again the other zones are working as expected but this one zone is showing zero cooling load/consumption and I am hopeful someone may have some insight.

Many thanks




Jeremiah D. Crossett

CleanTech Analytics

503-688-8951
www.cleantechanalytics.com

This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics