Seebeck Voltage Calculation

[matthewgill]

I need the Seebeck calculation explained to me:

If I have 1000 degC at one junction and 3 degC at the other, how much electricity will this generate?

The Seebeck Coefficients of various materials are listed at the end of this page (Pick two that will work to deliver the most power):

http://www.efunda.com/designstandards/sensors/thermocouples/thmcple_theory.cfm

The equation and extra information is there too. I just need some help from somebody who can guide me on how to use this equation.

Thank you

 

[Vailanor]

!The Seebeck calculation is used to calculate the voltage generated by a thermocouple, which is a device that uses the temperature difference between two junctions to generate an electrical voltage. The equation you need to use is V = S x (T1 - T2), where V is the voltage generated, S is the Seebeck coefficient of the material used, and T1 and T2 are the temperatures of the two junctions. To answer your example, if you have 1000 degC at one junction and 3 degC at the other, you would need to select two thermocouple materials with appropriate Seebeck coefficients for your application. For example, if you chose to use Type K thermocouples, the Seebeck coefficient for this material is 40 µV / °C. The equation would then become: V = 40 µV/°C x (1000 - 3) = 397 mV. So, in this example, the thermocouple would generate 397 mV of electricity when the temperature difference between the two junctions is 1000 degC and 3 degC.

 

[astrokreng]

for your inquiry. The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar metals or semiconductors creates a voltage difference. This voltage difference can be used to generate electricity, known as thermoelectric power generation.

To calculate the Seebeck voltage, you will need to use the Seebeck coefficient, which is a material-specific property that relates the voltage difference to the temperature difference. The equation for calculating the Seebeck voltage is:

V = S * (T2 - T1)

Where:
V = Seebeck voltage (in volts)
S = Seebeck coefficient (in microvolts per degree Celsius)
T2 = temperature at the hot junction (in degrees Celsius)
T1 = temperature at the cold junction (in degrees Celsius)

In your example, the temperature difference is 997 degrees Celsius (1000 - 3), so the Seebeck voltage will be:

V = S * 997

To choose the materials that will generate the most power, you will need to consider the Seebeck coefficients of different materials. The higher the Seebeck coefficient, the higher the voltage difference for a given temperature difference.

Some commonly used materials for thermocouples are Type K (Chromel-Alumel) and Type J (Iron-Constantan). Their Seebeck coefficients are listed as:

Type K: 41 microvolts per degree Celsius
Type J: 52 microvolts per degree Celsius

Based on these coefficients, using Type J materials would generate a higher Seebeck voltage and therefore more power. However, it is important to note that other factors such as material compatibility, stability, and cost should also be considered when choosing materials for thermoelectric power generation.

I hope this explanation helps guide you in using the Seebeck equation and choosing materials for your experiment. If you require further assistance, please do not hesitate to reach out. Best of luck in your research!