equation system with time and space derivation

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badia rt
badia rt am 28 Okt. 2020
Kommentiert: Alan Stevens am 29 Okt. 2020
hello everyone!
i have an equation system for a solar panel formed by 4 equations 3 of them are depending only on time variation and the last one is depending on time and space variation .could you help me to implement the last equation on matlab .does ode45 works to solve this equation system .
dTfluid/dz i: the variation of temperature in the coil
best regards

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Alan Stevens
Alan Stevens am 28 Okt. 2020
You could use the pdepe function (try doc pdepe). Alternatively, explicitly discretise z and use ode45 to solve the time dependence for each section.
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badia rt
badia rt am 29 Okt. 2020
thanks a lot Alan Stevens what is the value of "tau" that make this curve for solar flux G .is it the same shape of the curve for the other output??means Tglass Tpvt Twax Tfluid
about dTfluid/dz i didn't have other equations but we can make an assumption that the temperature is uniforme in each section or there is a linear variation
Alan Stevens
Alan Stevens am 29 Okt. 2020
Sorry, I should have noted that tau is just 6000, as in your original expression for sinterm.
There was no sensible solution for the other temperatures, but I didn't try further because of uncertainty in the z dependence. if the temperature is uniform along z then the dTfluid/dT will be zero (as it is in what I've supplied so far). If there is a inear variation then you will need to specity its magnitude.

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