[TRNSYS-users] Help in residential building simulation

[David BRADLEY]

Shahen,
   Without seeing the project, it is hard to know what is causing the 
cooling load to be low. Make sure that you check your assumption about 
the boundary temperature beneath the slab of the house. If it is set to 
0C then that would explain a low cooling load.
Kind regards,
  David


On 3/12/2014 09:10, Shahen Fakhraldin wrote:
> Hi all,
>
> Iam getting unreasonable total cooling results (around 2 RT) for a 
> house under semi arid climate (Baghdad, Iraq), even after using 
> maximum cooling without any constraints, e.g. schedules. Besides, I 
> have zero demands for heating in the winter.
> My house consists of 4 beds, 2 baths, 1 WC, corridor, living, dining, 
> kitchen, storage and machine rooms, and I assumed these schedules:
>
> 1-QCCUPATION:
> Bedrooms from 0-7 am is occupied at a rate one person for each bedroom
> Kitchen from 7-8, 12-14 & 19-20 at a rate 2 persons, same schedule is 
> applied for the dining room with rate 4 persons (which am not sure 
> about it)
> Living room from 7-24 at rate 4 persons (also here am not sure about that)
> As for the machine room, I assumed the heating and cooling are ON 24 
> hours.
>
> 2- INFILTEATION
> Constant value equal to (0.5) ACH
>
> 3- VENTILATION
> Constant value at rate 2 ACH for bathrooms and WC, and 5 ACH for the 
> kitchen according to the its occupant scheduale.
>
> 4-COOLING AND HEATING
> Cooling is ON for zones at occupation times when the temperature rises 
> above 25 deg C, otherwise it works when temperature up to 30 deg C for 
> unoccupied times.
> Heating is ON when temperatures drop below 22 for occupation and 15 
> for unoccupied
>
> 5- HEAT GAIN
> Kitchen 24 hr. Fridge + stove when it occupied
> Living room has 2 terminals
> Unfortunately, I don't know what are the gains from (absorption 
> chiller) in the machine room
>
> Are my assumptions true? And what I missed?
>
> Could you please help me
>
> Kind regards,
> Shahen
> /
>
> /
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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