ponents.
Here in the Netherlands there is a requirement for fresh schools, wherby the outside temperature decides the indoor temperature set points.
So if outdoor temp. is below 10 than the indoor temp. is between 20 - 24 degrees
and if outdoor temp is above 10 than the indoor temp. should be between 23 - 26.
Attached is a really simplified picture for what i mean.
Hopefully someone can help and tell me if this is possible.
gr. Lars…
onent are experiential or location specific. For example: humidex has been derived and widely used in Canada.Also both humidex and discomfort index should be used in in-shade conditions.For universal applications and locations, you should concentrate on either PET or UTCI (this is what "Outdoor Comfort Calculator" component is based on).
I have found out, that for instance - OutdoorComfortCalculator - which considers temperatures of 9-26 and other factors, gives the % of comfortable time outdoor for instance in Kenya in Africa (high temperatures and humidity) 55%, whereas within the same .epw data and some additional factors added to the Thermal Indices component, the "humidex" or "Discomfort index" give a result drastically lower, I think it was even 1-5% comfortable.How is that?
Yes, this is one of the issues that I have with UTCI index: the authors wanted to make it as an index applicable in any type of climate. To create the UTCI comfort categories a number of data has been collected from different locations (for hot humid climate, it was the data from Madagascar. I may be wrong on this). This resulted in universal comfortable range of 9 to 26 C which you mentioned. How would the people in Madagascar perceive the feel like temperature of 9 degrees as comfortable is beyond my understanding.Thermophysiology of a human in Madagascar, and in Poland is the same. However their acclimatization is quite different, which raises the issue with the upper universal comfortable range. In general people who live in hotter climates have a bit higher tolerance to high temperature than those living in continental climates. And vice-versa: their tolerance to lower temperatures is lower than the tolerance of the people from the continental climates. Here is a comparison of the UTCI - PET stress categories:
UTCI
all climates stress category
above +46 extreme heat stress+38 to +46 very strong heat stress+32 to +38 strong heat stress+26 to +32 moderate heat stress+9 to +26 no thermal stress+9 to 0 slight cold stress0 to -13 moderate cold stress-13 to -27 strong cold stress-27 to -40 very strong cold stressbelow -40 extreme cold stress
PET
(sub)tropical humid climate temperate climate stress categoryabove +42 above +41 extreme heat stress+38 to +42 +35 to +41 strong heat stress+34 to +38 +29 to +35 moderate heat stress+30 to +34 +23 to +29 slight heat stress+26 to +30 +18 to +23 no thermal stress+22 to +26 +13 to +18 slight cold stress+18 to +22 +8 to +13 moderate cold stress+14 to +18 +4 to +8 strong cold stressbelow +14 below +4 extreme cold stress
I attached below an example of PET humid climate comparison with UTCI, for in-shade and out-shade conditions.As it can be seen UTCI shows the percent of time comfortable: two times higher than PET.
Thank you Pin, for the useful comment, on usage of "Analysis period" component.…
al number 1 represents 1/1/1900 12:00:00 a.m. Times are stored as decimal numbers between .0 and .99999, where .0 is 00:00:00 and .99999 is 23:59:59. The date integers and time decimal fractions can be combined to create numbers that have a decimal and an integer portion. For example, the number 32331.06 represents the date and time 7/7/1988 1:26:24 a.m.
More info: http://support.microsoft.com/kb/214094…
Added by Ángel Linares at 4:50pm on November 27, 2010