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[EnergyPlus_Support] Re: GBR_Ebbw.Vale.Wales_MN6 weather file does not contain SizingPeriod:DesignDay
for the heating design day I shall I use the same figure?
thanks
Fernando
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
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> There are some wind speed and direction data in the .stat file. I picked 200 to give you a warmer condition. As pointed out by the experts, the MN6 file is not the same as ASHRAE data. So do use with care. As the design day sizing is the first step in simulation, the exact value is not that important. Remember to adjust and verify the equipment size when you are doing the actual simulation. During the actual annual simulation run, the design day sizing run is not required. I used the daily local extreme weather condition in the design day object for building design studies. Dr. Li
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: motabmx1@...
> Date: Sat, 15 Oct 2011 04:15:10 -0700
> Subject: Re: [EnergyPlus_Support] GBR_Ebbw.Vale.Wales_MN6 weather file does not contain SizingPeriod:DesignDay
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> Dear Dr Li,
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> I have a query about wind direction where does the 200 degree figure come from?
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> Thanks
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> From: Dru Crawley <dbcrawley@...>
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Saturday, October 15, 2011 10:43 AM
> Subject: Re: [EnergyPlus_Support] GBR_Ebbw.Vale.Wales_MN6 weather file does not contain SizingPeriod:DesignDay
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> For locations such as Ebbw Vale where there are not design conditions in the ASHRAE Handbook, the design condtions noted in the .STAT for THIS FILE ONLY -- not the longer period of record in the ASHRAE Handbook. (That's why there are no data listed in the .DDY.)
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> You should compare these with the data for nearby locations in the ASHRAE Handbook. They could vary significantly.
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> On Fri, Oct 14, 2011 at 1:23 PM, YuanLu Li <yli006@...> wrote:
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> From the MN6 weather file the .ddy has the following:-
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> Site:Location,
> Ebbw Vale_Wales_GBR Design_Conditions, !- Location Name
> 51.78, !- Latitude {N+ S-}
> -3.21, !- Longitude {W- E+}
> 0.00, !- Time Zone Relative to GMT {GMT+/-}
> 298.00; !- Elevation {m}
> ------------------------------------
> The following is from the .stat file:-
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> Statistics for GBR_Ebbw.Vale.Wales_MN6
> Location -- Ebbw Vale Wales GBR
> {N 51° 46'} {W 3° 12'} {GMT +0.0 Hours}
> Elevation -- 298m above sea level
> Standard Pressure at Elevation -- 97796Pa
> Data Source -- MN6
>
> -------------------
> Design Stat Coldest Month HDB 99.6% HDB 99%
> Units {} {C} {C}
> Heating 1 -5.5 -4.8
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> Design Stat Hottest Month CDB .4% CDB 1% CDB 2% CDP .4% CDP 1% CDP 2%
> Units {} {C} {C} {C} {C} {C} {C}
> Cooling 8 22.3 21.8 20.9 18.6 17.6 16.6
> ------------------
> From the next table, the corresponding minimum temperature is 5.0°C for August and 5.4°C for July. The maximum for July is 22.1°C. 22.3 and 5.4 combination is warmer.
> Therefore use 22.3 and 16.9 is as the max and difference in the DesignDay Data.
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> Dew points for the two months are: 18.5 and 18.8. (WetBulb)
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> Barometer reading: 97796.
> ============================
> Site:Location,
> Ebbw Vale_Wales_GBR HDB 99.6% , !- Name
> ===================
> The indented lines have been changed using the above
> data.
> ---------------
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> SizingPeriod:DesignDay,
> Ebbw Vale_Wales_GBR Annual Cooling 0.4% Design Conditions , !- Name
> 22.3, !- Maximum Dry-Bulb Temperature {C}
> 16.9, !- Daily Temperature Range {deltaC}
> 18.5, !- Humidity Indicating Conditions at Maximum Dry-Bulb
> 97796., !- Barometric Pressure {Pa}
> 3.0, !- Wind Speed {m/s}
> 200, !- Wind Direction {deg}
> 1.0, !- Sky Clearness
> 0, !- Rain Indicator
> 0, !- Snow Indicator
> 21, !- Day of Month
> 7, !- Month
> SummerDesignDay, !- Day Type
> 0, !- Daylight Saving Time Indicator
> WetBulb; !- Humidity Indicating Type
> ========================
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> You can copy any other DesignDay object for Winter and
> modify using the heating data from the .stat file. -5.5, 0, -5.5 and 0.0 for the sky clearness (no sun)
> Hope this will help.
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> TMY data exclude the extreme cases. You can use the sizing multiplying factor to increase or decrease the autosized equipment. Dr. Li
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> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: motabmx1@...
> Date: Fri, 14 Oct 2011 07:27:03 -0700
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> Subject: Re: [EnergyPlus_Support] GBR_Ebbw.Vale.Wales_MN6 weather file does not contain SizingPeriod:DesignDay
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> Dear Mr. Crawley,
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> Thanks for your quick replay. I have attached the map that you forwarded to me with same weather files that may be closer enough to the ebbw vale file. I wonder if as you mentioned in your previous e-mail, I could get them from you.
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> Many thanks
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> Fernando
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> From: Dru Crawley <dbcrawley@...>
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Wednesday, October 12, 2011 11:36 PM
> Subject: Re: [EnergyPlus_Support] GBR_Ebbw.Vale.Wales_MN6 weather file does not contain SizingPeriod:DesignDay
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> Unless there was design data available in the ASHRAE Handbook, the Meteonorm files that we created do not have the design day objects. Suggest finding a nearby location with similar climate and elevation and use the data from there.
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> My knowledge of Wales topography and geography is poor -- if one of the pins on the attached map look close, let me know and I'll send you the data.
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> On Wed, Oct 12, 2011 at 6:17 PM, motabmx1 <motabmx1@...> wrote:
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> Dear all,
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> I wonder if you can help me in the foolowing matter.
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> I download from this page the file GBR_Ebbw.Vale.Wales_MN6 which I am using in a project I am working at the moment. The problem is that this weather file does not contain any object in the section SizingPeriod:DesignDay which I think I need for sizing my HVAC, Does anyone have a file for this location with the design day objects?
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> thanks
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> fernando
>
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