[esp-r] Re: Modeling of clothing textile... using esp-r?

[D. Fiala]

Dear Denis,
I think models of human thermoregulation specifically developed to 
predict human thermal behaviours and validated using appropriate 
physiological data would better do the job you have in mind rather than 
using a building simulation program. In human heat transfer, heat 
conduction in the tissue (walls in esp-r) is a rather minor effect 
compared e.g. to blood circulation and thermoregulatory adjustments of 
the metabolic rates, skin blood flows, and moisture mass production (my 
experience of over 15 years in human thermal modelling). Here, esp-r 
might not be appropriate to model these effects (not mentioning e.g. the 
human body specific surface convection coefficients, etc.)
 
Coupled CFD-human physiology models as raised by Jianlei are certainly 
the 'cutting edge' in current thermal comfort modelling research. We at 
Uni Karlsruhe (together with DMU - both are European groups) are 
currently involved in modelling in detail the driving forces due to 
human occupancy in naturally ventilated buildings by coupling our model 
of human heat transfer and thermal comfort with CFD. If detailed CFD 
simulation was an 'overkill' for your purposes a link/coupling with 
tools like a building simulation program predicting reliably (but with 
less detail) the environmental conditions surrounding human occupants 
might be the better choice for you (we did that sort of 'coupling' some 
time ago by linking our dynamic model of human physiology and comfort 
with esp-r).

Best regards
Dusan Fiala



Am 18.01.2007 07:41, J.L. Niu schrieb:
> Dear Denis,
>
> You may refer to the following paper, which may provide some technical 
> details on combined simulation of human body thermal regulation and the 
> thermal environment.
>
> Gao, N. P., Niu JL, and Zhang H. Coupling CFD and human body 
> thermoregulation model for the assessment of personalized 
> ventilation",  International Journal of HVAC&R Research, 12 (3): 497-518 
> JUL 2006
>
> The work is done by iterative manual combination of CFD model and human 
> body model. We would be interested to work with any party to build up an 
> automated numerical model into esp-r.
>
> Jianlei Niu
>
> At 06:36 PM 1/17/2007, Denis Constales wrote:
>   
>> Dear All,
>>
>> I've just attended a presentation on the modeling of clothing
>> textiles (e.g. for firemen, or for use in foul weather, or for
>> certain patients who are unable to maintain proper body temperature,
>> etc.) and I was struck by the analogy with building simulation: it's
>> a matter of getting the heat, moisture and ventilation aspects
>> analyzed, while taking into account active components such as the
>> human body's "thermostat" set at 37 degrees Celsius, with the purpose
>> of ensuring comfort and maybe optimizing cost or other factors.
>>
>> Now if one were to model roughly a human body like a robot built out
>> of blocks, and if instead of wall layer data one were to use the
>> thermal etc. characteristics of given textile layers, quite useful
>> results might be obtained using esp-r for the textile industry (of
>> course on a time scale of simulated minutes rather than days as it is
>> now).
>>
>> My question: have people already been doing this? Would the
>> developers of esp-r be interested in, say, "modding" their code into
>> such a textile simulation package? It's not for charity, there are
>> European projects riding on these issues (for submission in April, I
>> understand). If there is interest, please tell me and I'll make sure
>> the people who need this will contact you. Thanks in advance, D.C.
>> --
>> Denis Constales
>>
>> _______________________________________________
>> esp-r mailing list
>> esp-r at lists.strath.ac.uk
>> http://lists.strath.ac.uk/mailman/listinfo/esp-r    
>>
>> _______________________________________________
>> esp-r mailing list
>> esp-r at lists.strath.ac.uk
>> http://lists.strath.ac.uk/mailman/listinfo/esp-r
>>