I'm new to this fourm and having a major problem with my TEM. The max rated current is 2.1Amps and max voltage is 2.19Volts with a THot of 50 deg celcius. and the max temperature difference across the hot and cold plates is 70 deg celcius.
I setup a test to see what currents I can get from the TEM as shown in the diagram below; the hot side is exposed to the light from a 60W light bulb and the cold side is attached to a coper pipe of 120mm in length and 40mm diameter. After 15 minuites the air on the hot side was 62.7deg celcius and the temperature of the copper pipe was 24.1 deg celcius giving a 38.6deg celcius temperature difference acros the hot and cold plates. The thing is I have the TEG powering an LED, and an ammeter connected in series with the LED so I can get the circuit current and with a temperature differnece across the hot and cold plates of 38.6 deg ceclius I'm getting zero current :? ?!?!?!?
What am I doing wrong? With this temperature differnece I would expect currents of at least half the max current as I generate a temp difference of more than half the max temperature differene!
I have contact melcor to ask if I'm doing something wrong, but that was a week ago and they have still not got back to me and I can't proceed with my project until this is sorted.
Has anyone ever used a TEM as a generator for the temperature range I am using? Is it possible to generate a decent current with Thot being about 60 deg celcius as I thought it's all about the temperature difference of the two plates?
I would be greateful if anyone out there can help as I don't know what I can do to generate a decent current at this temperature ( want about 0.9-1.0Amps )