[Equest-users] GSHP-Extreme Temperatures

[Matthew Higgins]

I had the same issue recently and resolved it by making sure that my 
bore-field configuration (i.e. 3x5 or other) and the number of identical 
well-fields multiplied out to the correct number of actual bores. Also 
make sure that there is not an error in your ground properties inputs.

Matthew Higgins, LEED AP + ASHRAE-HBDP
Environmental Dynamics, Inc.
Architecture and Sustainability Consulting Services
505.242.2851 x.103

Any data provided by the Consultant, verbal or written, are to be considered opinions of building energy and/or daylight performance. The Client understands that the Consultant has no control of occupant habits, equipment or material performance or characteristics, site or climate conditions or the Contractor's method of assembly, and that the Consultant's opinions regarding building energy/daylight performance are made on the basis of the Consultant's professional judgment and experience. The Consultant makes no warranty, express or implied, that the energy/daylight performance of the building will not vary from the Consultant's opinion of building energy/daylight performance.

Nick Caton wrote:

>The one time I dealt with extreme GSHP temperatures, I believe the cause was rooted in the need to manually enter some of the fields that determine flow and/or pump sizing for the GLHX/loop.  Notably however, they were not this extreme, and while they did occur within the first month, it was not on the first hour of the first day of the first month...  I would suggest to at least review those fields that might, incorrectly entered, cause you to have zero to low flow in the loop.
>
>
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>-----Original Message-----
>From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
>Sent: Monday, August 10, 2009 2:13 PM
>To:; HassanZareh
>Subject: Re: [Equest-users] GSHP-Extreme Temperatures
>
>Are you putting in the right number of wells??
>
>--- On Mon, 8/10/09, Zareh, Hassan <Hassan.Zareh at stantec.com> wrote:
>
>  
>
>>From: Zareh, Hassan <Hassan.Zareh at stantec.com>
>>Subject: [Equest-users] GSHP-Extreme Temperatures
>>To: equest-users at lists.onebuilding.org
>>Date: Monday, August 10, 2009, 11:44 AM
>>
>>Stantec
>> 
>>
>>#yiv1026167879
>>{MARGIN-TOP:25px;FONT-SIZE:10pt;MARGIN-LEFT:25px;COLOR:#000000;FONT-FAMILY:Arial;}
>>
>>
>> 
>> 
>>Hi All,
>>I'm modeling a
>>health care facility and the 
>>HVAC system is GSHP. Each time that I run the model, it
>>gives me warning about 
>>the following errors: 
>>Ground-loop HX: GLHX (VertWell-CM) 
>>is undersized for the load and is producing an
>>extreme
>>temperature of -388F. Mon/Day/Hr: 1/ 1/ 1
>> 
>>OR
>>Ground-loop HX: GLHX (VertWell-CM) 
>>is undersized for the load and is producing an
>>extreme
>>temperature of 351F. Mon/Day/Hr: 1/ 1/
>>1
>> 
>>Anybody has any ideas 
>>what's the reason for these extreme
>>temperatures?
>>Thanks in 
>>advance.
>> 
>>Hassan Zareh, 
>>M.Eng., P.Eng., LEED® AP
>>Project Engineer
>>Stantec Consulting 
>>Ltd.
>>100 - 401 Wellington Street West
>>Toronto ON M5V 
>>1E7
>>Ph: (416) 598-7642
>>Fx: (416) 596-6680
>>hzareh at stantec.com 
>>
>>stantec.com 
>>
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