[esp-r] Re: Heating and Cooling Loads
Felipe Durán
felipe at b-green.cl
Thu Sep 10 19:39:26 BST 2009
David,
I made a mistake and I simulated with esp-r using London Climate.
The rectified cooling and heating loads using CHL_Santiago_IWEC.epw
for the 1 zone 10x10x3 concrete box are:
IES_VE 14,66 kW (heating) 5.27 kW (cooling)
ESP-r 8,029 kW (heating) 2,24 kW (cooling)
Kind Regards,
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 10 Sep 2009, a las 13:31, Felipe Durán escribió:
> 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
>
> <pastedGraphic.tiff>
>
> 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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