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RES: [EnergyPlus_Support] opaque envelopes performances comparison
Emanuele,
You should pay attention on internal loads also.
We got interesting results doing a similar approach for more than 20,000
simulations using E+ with 3 Brazilian weather files. We have developed these
cases with different levels of internal loads and schedules.
Depending on climate, internal loads and schedules, increasing thermal
insulation of the envelop can decrease the building annual energy
consumption or not. For high internal loads a less insulated envelop could
be better. But it depends also on building geometry, as you have mentioned.
We can not generalize a conclusion yet... Other building geometry is being
simulated at this moment.
And I think that a real HVAC system would be necessary. We adopted the
COMPACT HVAC objects, simulating DX units (through the window packages and
split systems are the most common hvac system types in Brazilian office
buildings).
Good luck!
Regards,
Fernando Simon Westphal
Federal University of Santa Catarina - Brazil
_____
De: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] Em nome de
josep.sole@xxxxxxxxxxx
Enviada em: Friday, June 23, 2006 3:31 AM
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Cc: TMaile@xxxxxxx; davide.delloro@xxxxxxxxx
Assunto: RE: [EnergyPlus_Support] opaque envelopes performances comparison
I think it's a good approach.
Estimating the energy "demand" without any equipment it's possible to see
the impact of each solution at building level without system's
interferences.
Some building interventions are in relation between them and it's important
don't forget this situation.
Example: in hot climates if you don't use effective solar protection and
night cooling increase insulation is not favorable but if you use enough
solar protection and night cooling increase insulation is favorable.
Make attention on conclusions !
Josep Sole
URSA Iberica Aislantes SA.
s
____________-_________-_________-__
De: HYPERLINK
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"mailto:EnergyPlus_Support%40yahoogroups.com"EnergyPlus_Support@-yahoogroups
.-com] En nombre de Emanuele Naboni
Enviado el: jueves, 22 de junio de 2006 8:29
Para: HYPERLINK
"mailto:EnergyPlus_Support%40yahoogroups.com"EnergyPlus_Support@-yahoogroups
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CC: 'Tobias Maile'; 'Davide Dell'Oro'
Asunto: [EnergyPlus_-Support] opaque envelopes performances comparison
Gents,
I am doing a research experiment related to study how opaque envelopes
design effects building performances.
Basically the experiment compares different walls:
- high thermal inertia - high insulation - opaque ventilated facades
And different buildings having different ratio surface / volume
That is related to 6 different climates.
The result would be a table that shows which envelope has better performance
in different climates and building geometry.
To comparison parameter will be Kwh/m2 per year.
I'm wondering if to get this values I could use a Purchased Air for evaluate
the different building/envelope performances using the Purchased Air outputs
to evaluate these performances, rather then set up an HVAC for every
building.
Thanks everybody for your attention, and please send me any kind of advises!
Emanuele Naboni
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