RE: [EnergyPlus_Support] weather file for park merced (south san francisco)

["Crawley, Drury" <Drury.Crawley@xxxxxxxxxx>]

Rather than guess, here's a link to the documentation on the calculations:

 

http://www.meteonorm.com/meteonorm/media/pdf/mn6_theory.pdf

 

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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Joe Huang
Sent: Wednesday, March 11, 2009 11:25 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] weather file for park merced (south san francisco)

Horrors! Meteonorm is fine for generating synthetic weather data when
actual
weather data are unavailable, but this is a case of discerning
microclimate variations
in a specialized situation near the ocean. In my opinion, using
Meteonorm would
be setting you further back, rather than forwards, than simply using SFO
data without
interpolation.

There are programs for interpolating microclimatic variations like PRISM
out of
Univ. of Oregon, work done by CCB in Colorado, or Stuart Malkin at GBS,
but that's an order of magnitude greater detail than what MeteoNorm does.

Joe Huang
White Box Technologies

Edward G. Lyon wrote:
>
> this seems like a situation where Meteronorm would be valuable if you
> can embrace their methodology.
>
>
> *Ned Lyon, P.E. (MA)
> *Staff Consultant
>
> *SIMPSON GUMPERTZ & HEGER*
> *|* Engineering of Structures and Building Enclosures
>
> 41 Seyon Street, Bldg. 1, Suite 500
> Waltham, MA 02453
>
> 781.907.9000 main
> 781.907.9350 direct
> 781.907.9009 fax
>
> ----------------------------------------------------------
> *From:* EnergyPlus_Support@yahoogroups.com
> [EnergyPlus_Support@yahoogroups.com] On Behalf Of Emanuele Naboni
> [emanuele.naboni@gmail.com]
> *Sent:* Wednesday, March 11, 2009 8:58 PM
> *To:* EnergyPlus_Support@yahoogroups.com
> *Subject:* Re: [EnergyPlus_Support] weather file for park merced
> (south san francisco)
>
> Thank you Joe,
>
> Yes, seems like micro climate conditions are quite determinant for
> energy performances.
> Thanks anyway for your extended answer!
>
> Emanuele Naboni
>
> PhD Building Science, LEED AP, EU licensed architect
>
> +1.510.395.7241
>
> Please consider the environment before printing this email.
>
>
> On Wed, Mar 11, 2009 at 5:41 PM, Joe Huang <joe@drawbdl.com
> <mailto:joe@drawbdl.com>> wrote:
>
> Emanuele,
>
> Yes, there are many microclimates in San Francisco, but
> unfortunately only
> two active weather stations - one at SFO and the other at the
> Civic Center.
> This reminds me of some work I did about 15 years trying to
> simulate a
> building
> at the San Francisco Presidio, and looking around for a better
> weather
> file.
> There used to be a station at the Presidio, but that's been
> defunct for
> 30+ years.
> The other possibilities are to go up and down the coast, and find
> some
> station
> with data, such as Arena Point, etc., but then you're trading off
> geographical
> distance and sparseness of data against closeness to the coast. You
> could also
> cull local sources of weather data, such as PG&E or CMIS. Or, you
> might
> be able to get sparse data, i.e., max/min temperatures, etc. (I
> have a
> set from
> EarthInfo that I haven't looked at yet), for a closer stations and
> then
> run that against
> the detailed hourly data from a first-order station to "learn" the
> pertubations and
> get a hourly data set, but that's a research project (ASHRAE Weather
> Committee
> is actually working on a Work Statement (RFP) in this area).
>
> Joe Huang
> White Box Technologies
>
>
>
> Emanuele Naboni wrote:
> >
> > Dear All,
> >
> > Is there anyone that could suggest a weather file for Park Merced
> > (close to lake Merced - south San Francisco)?
> > The weather is very particular over there and San Francisco airport
> > data seems to be not appropriate.
> >
> > Thanks you so much.
> > Regards,
> >
> > Emanuele Naboni
> >
> > PhD Building Science, LEED AP, EU licensed architect
> >
> > +1.510.395.7241
> >
> > Please consider the environment before printing this email.
> >
> >
>
>
>

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