[esp-r] Re: Phase change materials properties

[Dariusz Heim]

Dear Juanita,

The displayed unit for thermal conductivity should be W/(m^2K).

The detailed explanation about "a" and "b" you can find below:
https://github.com/ESP-rCommunity/ESP-rSource/blob/master/src/ebld/spmatl.F
line 4876 (case 2).

Good luck,
Darek


W dniu 29.07.2019 o 09:48, Juanita Solano Guzmán pisze:
> Hello to All,
>
> I am currently trying to figure out the meaning of the input values 
> and units when defining a phase-change material.
>
> *- Melting temperature degC:* no questions
> *- Solidification temperature degC:* no questions
> *- Thermal conductivity in the solid phase J/kg: *In the ESPr 
> interface the thermal conductivity is shown to have units of J/kg, I 
> assume this is a mistake?
> *- Thermal conductivity in the liquid phase J/kg: *same as above
> *- Specific heat  J/kg.K: *no questions
> *- Latent heat of member a J/kg.K^2 and b J/kg.K:* In a previous post 
> I read that a and b, represent the values of a linear function y = ax 
> + b. Woud this linear function correspond to the effective heat 
> capacity given by:
>
> C_eff = L/(Te-To) + Cp(T=To)
>
> L - latent heat
> Te - Offset temperature
> To - Onset temperature
> Cp - specific heat at the onset temperature
>
> in that case, would "a" be equal to L/(Te-To) and "b" to Cp(T=To)?  
> And then "x" in the linear function corresponds to the temperature?
>
> Thank you in advance for your help,
>
> Best Regards,
> Juanita
>
>
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> esp-r at lists.strath.ac.uk
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--- 

Politechnika Łódzka 

Lodz University of Technology 



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