[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] electric equipment



If equipment is not adding any heat load to the building how this will make any difference weather load is in building or sitting outside the building. The most simple way of modeling this would be by  using excel by multiplying demand, number of hours of usage and fractional load.

Hope this helps!

On 19 Aug 2015 9:30 pm, "Fakeha Sehar fakeha_s@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
 

Exterior objects only support exterior lights, fuel and water equipment. I am modeling electric vehicles. I have defined them as electric equipment but the schedule values d not simply add to building demand.



On Wednesday, August 19, 2015 10:31 AM, "Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:


 
Fakeha,
You have shown a schedule, so I don't know which eletric equipment object you're using...
 I recommend using ExteriorEquipment instead of ElectricEquipment.  this will add to the electricity use, but that power will not affect the HVAC system.  This is the object used commonly for parking lot lighting, but can be used for other purposes.

On Wed, Aug 19, 2015 at 11:26 AM, Fakeha Sehar fakeha_s@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
 
I am adding an electric equipment to my building model. I do not want this equipment to add to cooling load so I have kept fraction latent, radiant, lost all equal to zero. The equipment schedule is defined as follows:

 For: Weekdays SummerDesignDay,           !- Field 2
    Until: 2:00,            !- Field 3
    0,                    !- Field 4
Until: 3:00,            !- Field 3
    0,                    !- Field 4
Until: 4:00,            !- Field 3
    0,                    !- Field 4
Until: 5:00,            !- Field 3
    0,                    !- Field 4
Until: 6:00,            !- Field 3
    0,                    !- Field 4
Until: 7:00,            !- Field 3
    0,                    !- Field 4
    Until: 7:30,            !- Field 9
    0.006,                    !- Field 10
    Until: 8:00,            !- Field 11
    9.648,                    !- Field 12
    Until: 8:30,            !- Field 11
    15.714,                    !- Field 12
    Until: 9:00,            !- Field 13
    41.166,                    !- Field 14
    Until: 9:30,            !- Field 15
    61.002,                    !- Field 16  
    Until: 10:00,            !- Field 15
    76.890,                    !- Field 16   
    Until: 10:30,            !- Field 15
    82.116,                    !- Field 16  
    Until: 11:00,            !- Field 15
    80.688,                    !- Field 16  
    Until: 11:30,            !- Field 15
    77.250,                    !- Field 16  
    Until: 12:00,            !- Field 15
    68.016,                   !- Field 16 
    Until: 12:30,            !- Field 15
    59.730,                    !- Field 16  
    Until: 13:00,            !- Field 15
    27.852,                    !- Field 16  
    Until: 13:30,            !- Field 15
    23.778,                    !- Field 16  
    Until: 14:00,            !- Field 15
    28.782,                    !- Field 16  
    Until: 14:30,            !- Field 15
    38.730,                    !- Field 16 
    Until: 15:00,            !- Field 15
    55.812,                    !- Field 16  
    Until: 15:30,            !- Field 15
    88.614,                    !- Field 16  
    Until: 16:00,            !- Field 15
    91.662,                    !- Field 16  
    Until: 16:30,            !- Field 15
    89.328,                    !- Field 16 
    Until: 17:00,            !- Field 15
    77.706,                    !- Field 16 
    Until: 17:30,            !- Field 15
    74.916,                    !- Field 16  
    Until: 18:00,            !- Field 15
    71.268,                    !- Field 16  
    Until: 18:30,            !- Field 15
    50.436,                    !- Field 16  
    Until: 19:00,            !- Field 15
    23.094,                    !- Field 16   
    Until: 19:30,            !- Field 15
    9.492,                    !- Field 16 
    Until: 20:00,            !- Field 15
    2.448,                    !- Field 16  
    Until: 20:30,            !- Field 15
    0,                    !- Field 16  
    Until: 24:00,            !- Field 15
    0;                    !- Field 16  
    


Shouldn't the above equipment's power simply add to the building's original demand? Simulation results do not show this. The building's demand is coming out higher  than the  original building demand plus the equipment power. Please if anyone can explain.







--
James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx

Website l  LinkedIn
Life is not easy.  Itâ??s never been easy. Expecting it to be easy is not a healthy attitude.
Relax. Refresh. Regroup. Carry on.




__._,_.___
Posted by: Javed Iqbal <eee.javed@xxxxxxxxx>


Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.



Visit Your Group
Yahoo! Groups
• Privacy • Unsubscribe • Terms of Use

__,_._,___