Comfort zone problem

Replies to This Discussion

Permalink Reply by Chris Mackey on April 21, 2015 at 12:01am

Hitoki,

The function that is generating the comfort polygon on the psychrometric chart component is the ASHRAE 55 PMV model, which is the same as the one used in Climate Consultant.  If the two polygons are not aligning exactly, it is probably because the 4 PMV parameters other than air temp and humidity are different between the Ladybug Psych chart and Climate Consultant (including radiant temp, wind speed, metabolic rate, and clothing level).  Check these values on the first window of Climate consultant and make sure that you are inputting the same ones into the Psych Chart component.

If you want an ASHRAE 55 reference that will align more easily with the Ladybug Psych chart by default, I translated the code for the Ladybug PMV model from the open source CBE Comfort tool (http://smap.cbe.berkeley.edu/comforttool).

Hope this helps,

-Chris

Permalink Reply by HitokiKanto on April 21, 2015 at 5:48am

Chris,

Thanks for your replay.

I checked  first window of Climate consultant(like a photo), but i did not find the 4 PMV parameters.

is this Window true?

Could you tell me where I can find the 4 PMV parametersin detail.

Best　Regards.

Permalink Reply by Abraham Yezioro on April 21, 2015 at 5:52am

Is not the first window (no need to be so literal). Go ahead in the screen and you'll see clearly what Chris intended.

-A.

Permalink Reply by HitokiKanto on April 21, 2015 at 6:05am

Abraham,Chris,

I find IT!

Thank you very very much!!!!

Permalink Reply by HitokiKanto on April 21, 2015 at 7:08am

Sorry　for a lot of question.

I could input other data into Psych Chart component.

But I have One question.

Indoors,Climate Consultant say that Rad temperature is same of dry bulb temperatuere.

So I insert Dry bulb temperature to Mean Rad Temperature of Psych Chart

component.

But it does not work.

Can I input one data number  to Mean Rad Temperature of Psych Chart

component?

What should I do?

Best regard.

Hiro

Permalink Reply by Abraham Yezioro on April 21, 2015 at 10:18am

Always good to upload the file to see what is going on ...

-A.

Permalink Reply by Chris Mackey on May 2, 2015 at 10:43am

HitoKanto,

Sorry for such a late reply as things have been busy with my thesis recently.  Also, sorry for the confusion about the page of climate consultant that has the comfort model info.

You can and should put only one or a few values in for Mean Rad Temperature input.  Remember that this is the radiant temperature that is used to generate the comfort polygon and that radiant temperature is, itself, not plotted on the Psychrometric chart.  Effectively, what you are telling the psych chart component to do there is to generate a comfort polygon for each and every air temperature for every hour of the year (so 8760 comfort polygons).  Normally, I think that this process would run for hours into oblivion but I am glad that you get an error instead.

To further clarify, the "Comfort Highest/Lowest Temp calculated by PMV model" inputs on this climate consultant page are what are setting the radiant temperature of the climate consultant comfort polygon:

-Chris