[esp-r] Re: Heating and Cooling Loads
Felipe Durán
felipe at b-green.cl
Thu Sep 10 18:31:13 BST 2009
David,
Thank you for your help.
The results of the 1 zone 10x10x3 concrete box are:
IES_VE 14,66 kW (heating) 5,27 kW (cooling)
ESP-r 11,90 kW (heating) 1,86 kW (cooling)
1. Geometry: 1 zones of 10 m x 10 m x 3 m high.
2. Materials (outside to inside)
2.1 External Wall: Cast Concrete 0,2m, U-value = 3,1963 (W/m2K)
2.2 Roof: Cast Concrete 0,2 U-value = 3,5354 (W/m2K)
2.3 Ground Floor: Cast Concrete 0.2 m, U-value = 2.8340 (W/m2K)
3. Boundary Conditions: All the walls and the roof faces the outside.
The ground floor faces the ground.
4. Run Period: 1/1 31/12 (whole year)
5.No Internal gains
6. Climate file CHL_Santiago_IWEC.epw (from the energyplus database)
7. Comfort band 20 Cº-24Cº, on Heating and Cooling Profile:
continiously
8. No Ventilation
Thank you again
Felipe Durán Palma
Arquitecto PUC, MPhil. U. Cambridge
Director de Proyectos y Asesorías
Obispo Donoso 5 oficina 62 - Providencia - Santiago
felipe at b-green.cl - www.b-green.cl - 56 (2) 3431868
El 9 Sep 2009, a las 22:56, Tang, David escribió:
> Felipe,
> I'd like to start with your 'a zone of 10 x 10 x 3 mt. high with no
> ventilation and no internal gains' model which is an excellent case
> to evaluate the fundamental algorithms.
>
> Please provide info of that model likewise.
>
> Having worked at IES-VE for 8+ years and coded part of Apache-sim
> and the whole of macroflo, it is interesting to see how it works
> from user's point of view.
>
>
> Regards,
> David Tang
> Chief Engineer, Energy Solutions
> Owens Corning
> T: +86 21 6101 9587; F: +86 21 6101 9588; m: +86 13817249419
>
>
>
> From: Felipe Durán [mailto:felipe at b-green.cl]
> Sent: Thursday, September 10, 2009 1:01 AM
> To: Tang, David
> Cc: leen peeters; Tang, Kevin; Xing, Nina; esp-r at lists.strath.ac.uk;
> Rodrigo Perez
> Subject: Re: [esp-r] Re: Heating and Cooling Loads
>
> David and Rodrigo,
>
> Thank you for your help.
> I`ve simplify the model and the results of the 3-floor office
> building are:
>
> IES_VE 390 kW (heating) 123 kW (cooling)
> ESP-r 246 kW (heating) 205 kW (cooling)
>
>
> The model conditions of the 3-floor office building are:
> IES_VE 390 kW (heating) 123 kW (cooling)
>
> 1. Geometry: 3 zones of 25 m x 60 m x 2.5 m high. 40% of glazing
> ratio for all the orientations
>
> 2. Orientation: North towards the long side (25 meters)
>
> 3. Materials (outside to inside)
> 3.1 External Wall: cast concrete 0,2m, Polystyrene 0.02m, Gypsum
> Plasterboard 0,01m. U-value = 0.9597 (W/m2K)
> 3.2 Window: Double glazing, clear float 6mm + 12mm cavity. U-
> Value=2.82 (W/m2K)
> 3.3 Roof: Cast concrete (lightweight) 0.05m, Polystyrene 0.15m, cast
> concrete 0,15m. U-value = 0.1859 (W/m2K)
> 3.4 Ground Floor: Cast Concrete 0.15 m, polystyrene 0.05 m, U-value
> = 0.5041 (W/m2K)
> 3.5 Slabs: cast Concrete 0.15, U-value = 3,2558 (W/m2K)
>
> 4. Boundary Conditions: All the walls and the roof faces the
> outside. The slabs are interiors and only the ground floor faces the
> grund.
>
> 5. Run Period: 1/1 31/12 (whole year)
>
> 6. Internal gains: Occupancy 6 m2/person (70 W Sensible, 35 W
> latent), Lighting 8 W/m2, Equipment 5 W7m2. All the time for the
> whole year, including nights, weekends, etc.
>
> 7. Climate file CHL_Santiago_IWEC.epw (from the energyplus database)
>
> 8. Comfort band 20 Cº-24Cº
>
> 9. Ventilation: infiltration 0.25 (ach/h), auxiliari ventilatios
> 3.25 (ach/h) on ESP-r infiltration of 3.25 (ach/h)
>
> Thank you again
>
>
> Felipe Durán Palma
> Arquitecto PUC, MPhil. U. Cambridge
> Director de Proyectos y Asesorías
>
>
> Obispo Donoso 5 oficina 62 - Providencia - Santiago
> felipe at b-green.cl - www.b-green.cl - 56 (2) 3431868
>
>
>
>
>
> El 9 Sep 2009, a las 00:22, Tang, David escribió:
>
>> Describe your model we'll run DOE2 and EnergyPlus to see who's right.
>>
>> geometry,
>> orientation
>> wall, window, roof materials,
>> boundary conditions (is the wall contact outside, ground, other
>> indoor space?)
>> run period (from mm/dd to mm/dd),
>> etc.
>> as detail as possible.
>>
>> Regards,
>>
>> David Tang
>> Chief Engineer, Energy Solutions
>> Owens Corning
>> T: +86 21 6101 9587; F: +86 21 6101 9588; m: +86 13817249419
>>
>>
>>
>> From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk
>> ] On Behalf Of Felipe Durán
>> Sent: Wednesday, September 09, 2009 5:10 AM
>> To: leen peeters
>> Cc: esp-r at lists.strath.ac.uk
>> Subject: [esp-r] Re: Heating and Cooling Loads
>>
>> Leen,
>>
>> I am working with the EPW climate file of Santiago de Chile in both
>> soft wares. I ve modelled a zone of 10 x 10 x 3 mt. high with no
>> ventilation and no internal gains. The results are:
>>
>> ESP-r = 11.9 (heating), 1.86 (cooling)
>> IES = 14.6 (heating), 5.2 (cooling)
>>
>> Now we got great differences in the cooling load. IES gave me 3
>> times more cooling loads than ESP-r
>>
>> Any ideas how to go proceed?
>>
>> Felipe Durán Palma
>> Arquitecto PUC, MPhil. U. Cambridge
>> Director de Proyectos y Asesorías
>>
>> Obispo Donoso 5 oficina 62 - Providencia - Santiago
>> felipe at b-green.cl - www.b-green.cl - 56 (2) 3431868
>>
>>
>> El 8 Sep 2009, a las 16:49, leen peeters escribió:
>>
>>> Felipe,
>>>
>>> set you climate to some artifical constant climqte with constant
>>> temperature, constant solar radiation,... That is one more set of
>>> variables excluded
>>>
>>> Leen
>>>
>>> 2009/9/8 Felipe Durán <felipe at b-green.cl>
>>> Dear Samuel and Leen,
>>>
>>> Actually, when I found out such big differences I ve modelled a
>>> very simple 3-zone model and the differences persist.
>>>
>>> I will try out with a simple box without ventilation and internal
>>> gains and I will let you know the results.
>>>
>>> Thank you all for your help.
>>>
>>> Felipe Durán Palma
>>> Arquitecto PUC, MPhil. U. Cambridge
>>> Director de Proyectos y Asesorías
>>>
>>> <pastedGraphic.tiff>
>>>
>>> Obispo Donoso 5 oficina 62 - Providencia - Santiago
>>> felipe at b-green.cl - www.b-green.cl - 56 (2) 3431868
>>>
>>>
>>> El 8 Sep 2009, a las 13:19, Aizaz Samuel escribió:
>>>
>>>> Try reducing your model complexity by modelling just one zone
>>>> with minimal
>>>> information possible. Simulate for just one day. If the two
>>>> softwares compare
>>>> well keep building up the model in complexity.
>>>>
>>>> -Aizaz
>>>>
>>>>
>>>> On Tuesday 08 September 2009 17:41, Felipe Durán wrote:
>>>>> Dear All,
>>>>> I am modeling in both ESP-r and IES-VE and office building and
>>>>> the results
>>>>> for heating and cooling loads are very different.
>>>>>
>>>>> ESP-r = 269 kW (heating); 237 kW (cooling)
>>>>> IES-VE = 835 kW (Heating); 360 kW (cooling)
>>>>>
>>>>> Does anyone had a similar experience with such differences?
>>>>>
>>>>> Kind Regards,
>>>>>
>>>>> Felipe Durán Palma
>>>>> Arquitecto PUC, MPhil. U. Cambridge
>>>>> Director de Proyectos y Asesorías
>>>>> [cid:B9AD3F91-76F4-4F37-8A2C-7A559281C059]
>>>>> Obispo Donoso 5 oficina 62 - Providencia - Santiago
>>>>> felipe at b-green.cl<mailto:felipe at b-green.cl> -
>>>>> www.b-green.cl<http://www.b-green.cl> - 56 (2) 3431868
>>
>>
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