Wish I had the time. Great project and I have D70 CCD. Project burn out.
Is this of any help for your TEC calculations.
TEC hot side (TH) formula; where
TA = air temperature
Q = heatload - active + passive
Calculate Heatsink RQ
TH = TA + (V*I + Q)RQ
Transposing;
Heatsink Rating C/W
RQ = (TH - TA)/(V*I +Q)
or, substituting W for V*I
RQ = (TH – TA)/(W + Q)
Calculate copper plate passive heat load
Passive heat load formula Qp = kAD/L where;
k = the conductivity value of the material
A = the area of the conduction source
D = the differential between air temperature and component temperature.
L = the length of the conductive medium
k (kappa) of copper = 348 - steel k = 56 - fibreglass or plastic attributed k = 0.04.
Sensor active heat load
~250mW / MP - just an estimate.
I've attached an RQ calculator which is interesting to play with. Based on the TH formula above.
Last edited by rcheshire; 26-11-2016 at 04:39 PM.
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