Posted by *Curbie* on April 18, 2009, 7:07 pm

I finished TMY (Typical Meteorological Year) conversion and

normalization routines to compile the 239 reporting station's data

into summary records for each station, the idea here is to select a

location based on the closest station to use that station's summarized

data elements to drive calculations within for spread-sheet.

I also finished the porting of NREL's solar.c/h to VB for use in the

spread-sheet which along with TMY station data summaries should

provide (among other things) solar heat gain on any opaque or through

and glass construction surface. So my next step is to focus on the

application of all this in the spread-sheet.

The general calculation I have been currently using for total heating

& cooling loads is:

1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or

CDD (supplied by TMY).

So, if anyone can offer any constructive ideas, I would appreciate it.

Thanks

Curbie

Posted by *Eeyore* on April 18, 2009, 7:29 pm

Curbie wrote:

*> I finished TMY (Typical Meteorological Year) conversion and*

*> normalization routines to compile the 239 reporting station's data*

*> into summary records for each station, the idea here is to select a*

*> location based on the closest station to use that station's summarized*

*> data elements to drive calculations within for spread-sheet.*

*> I also finished the porting of NREL's solar.c/h to VB for use in the*

*> spread-sheet which along with TMY station data summaries should*

*> provide (among other things) solar heat gain on any opaque or through*

*> and glass construction surface. So my next step is to focus on the*

*> application of all this in the spread-sheet.*

*> The general calculation I have been currently using for total heating*

*> & cooling loads is:*

*> 1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or*

*> CDD (supplied by TMY).*

Does anyone have a clue what this is supposed to mean ?

Graham

Posted by *Martin Riddle* on April 18, 2009, 11:49 pm

*> Curbie wrote:*

*>> I finished TMY (Typical Meteorological Year) conversion and*

*>> normalization routines to compile the 239 reporting station's data*

*>> into summary records for each station, the idea here is to select a*

*>> location based on the closest station to use that station's *

*>> summarized*

*>> data elements to drive calculations within for spread-sheet.*

*>>*

*>> I also finished the porting of NREL's solar.c/h to VB for use in the*

*>> spread-sheet which along with TMY station data summaries should*

*>> provide (among other things) solar heat gain on any opaque or through*

*>> and glass construction surface. So my next step is to focus on the*

*>> application of all this in the spread-sheet.*

*>>*

*>> The general calculation I have been currently using for total heating*

*>> & cooling loads is:*

*>> 1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or*

*>> CDD (supplied by TMY).*

*> Does anyone have a clue what this is supposed to mean ?*

*> Graham*

I believe it’s the heat gain thru a 'surface' any where there was

supplied data.

Where a 'surface' can be glass or a solid.

Cheers

Posted by *daestrom* on April 20, 2009, 9:57 pm

*> Curbie wrote:*

*>> I finished TMY (Typical Meteorological Year) conversion and*

*>> normalization routines to compile the 239 reporting station's data*

*>> into summary records for each station, the idea here is to select a*

*>> location based on the closest station to use that station's summarized*

*>> data elements to drive calculations within for spread-sheet.*

*>>*

*>> I also finished the porting of NREL's solar.c/h to VB for use in the*

*>> spread-sheet which along with TMY station data summaries should*

*>> provide (among other things) solar heat gain on any opaque or through*

*>> and glass construction surface. So my next step is to focus on the*

*>> application of all this in the spread-sheet.*

*>>*

*>> The general calculation I have been currently using for total heating*

*>> & cooling loads is:*

*>> 1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or*

*>> CDD (supplied by TMY).*

*> Does anyone have a clue what this is supposed to mean ?*

What's the matter, no Imperial units listed for you to bash?

The only term that is unit specific is Thermal Resistance must be stated in

<units of energy> / area-degree-hour. That is so the '* 24' will convert it

to <units of energy> / area-degree-day which will then work well with HDD or

CDD.

If the 'Heating Degree Days' or 'Cooling Degree Days' are in terms of

degrees Centigrade, even a SI fanatic like you could use this formula.

If your units for area and temperature difference don't match those in the

thermal-resistance term, a little unit analysis should help you figure out

the conversions. Or have you forgotten how to do that since it's been so

long..??

daestrom

Posted by *Eeyore* on April 21, 2009, 3:35 pm

daestrom wrote:

*> > Curbie wrote:*

*> >*

*> >> I finished TMY (Typical Meteorological Year) conversion and*

*> >> normalization routines to compile the 239 reporting station's data*

*> >> into summary records for each station, the idea here is to select a*

*> >> location based on the closest station to use that station's summarized*

*> >> data elements to drive calculations within for spread-sheet.*

*> >>*

*> >> I also finished the porting of NREL's solar.c/h to VB for use in the*

*> >> spread-sheet which along with TMY station data summaries should*

*> >> provide (among other things) solar heat gain on any opaque or through*

*> >> and glass construction surface. So my next step is to focus on the*

*> >> application of all this in the spread-sheet.*

*> >>*

*> >> The general calculation I have been currently using for total heating*

*> >> & cooling loads is:*

*> >> 1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or*

*> >> CDD (supplied by TMY).*

*> >*

*> > Does anyone have a clue what this is supposed to mean ?*

*> What's the matter, no Imperial units listed for you to bash?*

I still use a few of them myself for routine everyday stuff but never for

engineering.

*> The only term that is unit specific is Thermal Resistance must be stated in*

*> <units of energy> / area-degree-hour. That is so the '* 24' will convert it*

*> to <units of energy> / area-degree-day which will then work well with HDD or*

*> CDD.*

*> If the 'Heating Degree Days' or 'Cooling Degree Days' are in terms of*

*> degrees Centigrade, even a SI fanatic like you could use this formula.*

I've never heard those terms before, nor TMY.

*> If your units for area and temperature difference don't match those in the*

*> thermal-resistance term, a little unit analysis should help you figure out*

*> the conversions. Or have you forgotten how to do that since it's been so*

*> long..??*

It was the acronyms that puzzled me. How do you define a HDD or CDD or a TMY ?

Graham

> I finished TMY (Typical Meteorological Year) conversion and> normalization routines to compile the 239 reporting station's data> into summary records for each station, the idea here is to select a> location based on the closest station to use that station's summarized> data elements to drive calculations within for spread-sheet.> I also finished the porting of NREL's solar.c/h to VB for use in the> spread-sheet which along with TMY station data summaries should> provide (among other things) solar heat gain on any opaque or through> and glass construction surface. So my next step is to focus on the> application of all this in the spread-sheet.> The general calculation I have been currently using for total heating> & cooling loads is:> 1Â° Heat-Loss Per-Day = ((Area / Thermal Resistance) * 24)) * HDD or> CDD (supplied by TMY).