[Equest-users] eQUEST building skin effects in cooling but notheating

[Gary.Schrader at tac.com]

Brian,
 
You have a significant amount of light and occupant load in your
building. Are you using a heating design day? Does that design day call
for a heating design day schedule? Does that heating design day schedule
shut down the lights/occupants during the course of the day such that no
light/occupant load is contributed to the space during the heating
season?
 
My prediction is that your lights/occupants/etc. are still scheduled
during the winter months and thus your building doesn't NEED heat. Check
your schedules to ensure that the above items are "off" during the
winter months such that the room isn't heating itself.
 
Another way to prove this would be to run an hourly report and check to
see if your cooling coil(s) is/are in use during all days of the year.
 
Just an idea of where to start.
 
Thanks,
Gary Schrader
Engineer I

TAC
16011 College Blvd, Suite 212
Lenexa, KS  66219


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________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Brian
Davis
Sent: Thursday, December 04, 2008 10:44 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] eQUEST building skin effects in cooling but
notheating



I am using the refrigeration version of equest 3.61 and have several
zones within the building which have exterior walls and roof.  The
equest output notes loads in cooling for them but not in heating while
other zones properly indicate loads for both cooling and heating, has
anyone else run across this and can suggest something for me to check.
The output is listed below.

 

 

 

REPORT- LS-B Space Peak Load Components     EL1 NNE Perim Spc (G.NNE16)
WEATHER FILE- Baltimore    MD TMY2

------------------------------------------------------------------------
---------------------------------------------------------

 

SPACE  EL1 NNE Perim Spc (G.NNE16)     

SPACE TEMPERATURE USED FOR THE LOADS CALCULATION IS   70 F /  21 C

 

 

                    MULTIPLIER        1.0          FLOOR MULTIPLIER
1.0

 

                    FLOOR  AREA     28544  SQFT      2652   M2 

                    VOLUME         513785  CUFT     14550   M3 

 

 

                                          COOLING  LOAD
HEATING  LOAD

                                     ==========================
==========================

    TIME                                    AUG  3  7PM


 

    DRY-BULB TEMP                      93 F             34 C

    WET-BULB TEMP                      76 F             24 C

    TOT HORIZONTAL SOLAR RAD           80 BTU/H.SQFT   252 W/M2

    WINDSPEED AT SPACE                5.3 KTS          2.7 M/S

    CLOUD AMOUNT 0(CLEAR)-10            0

 

 

 

                                  SENSIBLE            LATENT
SENSIBLE     

                            (KBTU/H)    ( KW )  (KBTU/H)  ( KW )
(KBTU/H)  ( KW )  

                            --------    ------  --------  ------
--------  --------

 

     WALL CONDUCTION           4.394     1.287     0.000   0.000
0.000     0.000

     ROOF CONDUCTION          28.204     8.264     0.000   0.000
0.000     0.000

     WINDOW GLASS+FRM COND     0.000     0.000     0.000   0.000
0.000     0.000

     WINDOW GLASS SOLAR        0.000     0.000     0.000   0.000
0.000     0.000

     DOOR CONDUCTION           0.000     0.000     0.000   0.000
0.000     0.000

     INTERNAL SURFACE COND     0.000     0.000     0.000   0.000
0.000     0.000

     UNDERGROUND SURF COND    -0.666    -0.195     0.000   0.000
0.000     0.000

     OCCUPANTS TO SPACE       18.451     5.406    15.444   4.525
0.000     0.000

     LIGHT     TO SPACE      144.060    42.209     0.000   0.000
0.000     0.000

     EQUIPMENT TO SPACE        0.000     0.000     0.000   0.000
0.000     0.000

     PROCESS   TO SPACE        0.000     0.000     0.000   0.000
0.000     0.000

     INFILTRATION              1.692     0.496     2.090   0.612
0.000     0.000

                            --------   -------   -------  ------
--------  --------

     TOTAL                   196.134    57.467    17.534   5.137
0.000     0.000

     TOTAL / AREA              0.007     0.022     0.001   0.002
0.000     0.000

 

     TOTAL LOAD              213.669 KBTU/H       62.605  KW
0.000 KBTU/H        0.000  KW 

     TOTAL LOAD / AREA         7.49  BTU/H.SQFT   23.609  W/M2
0.000 BTU/H.SQFT    0.000  W/M2 

 

 

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