The Seebeck effect is a fundamental physical phenomenon that plays a crucial role in thermoelectric applications. It is closely related to the Thomson and Peltier effects, forming the basis for technologies such as thermoelectric power generation and semiconductor cooling. To help students better understand this concept, the Seebeck Effect Experiment Instrument has been developed, integrating this principle into physics education.
This instrument is designed with modularity in mind, allowing each functional component to be separated into distinct parts. The system includes two thermal blocks (heat source 1 and heat source 2) with insulation, along with a semiconductor refrigeration unit. This unit consists of two thermoelectric modules: one for generating a temperature difference and the other for measuring the corresponding electromotive force. Additionally, an anti-air heating switch is included for safety. This design not only enhances the interchangeability of parts but also helps students grasp the internal structure and function of the device more effectively.
Equipped with a 128x128 dot matrix LCD screen, the instrument provides clear visual feedback on key parameters such as the temperatures of both heat sources, heating time, and system status. This makes the experimental process more transparent and easier to follow.
The experiment can achieve several key objectives:
- Instrument Setup: Users can adjust the duration of each working cycle to suit different experimental needs, making it flexible for classroom use.
- Temperature Difference Measurement: By measuring current, voltage, and heating time, the heat absorbed (Q1) and heat released (Q2) can be calculated, enabling the evaluation of the cooling efficiency of the semiconductor module.
- Energy Conservation Law Verification: By comparing the heat absorbed and released, students can confirm that energy is conserved within an isolated system, aligning with the first law of thermodynamics.
- Thermoelectric Potential vs. Temperature Difference: Students can record the temperature difference and corresponding electromotive force to explore their relationship under varying conditions.
- Second Law of Thermodynamics: Observing the direction of heat transfer between the two blocks confirms that heat always flows from a hotter to a colder object, validating the second law.
Thermal science is a vital area of physics, yet there are limited hands-on experiments available for students. The Seebeck Effect Experiment Instrument fills this gap by offering quantitative measurements that verify core thermodynamic laws. It enriches the curriculum and enhances the learning experience in thermal physics.
This instrument allows for the study of both the Thomson and Peltier effects alongside the Seebeck effect, helping students move from a basic understanding to a deeper analytical comprehension of thermoelectric phenomena.
Designed to support cognitive development, practical skills, and creative thinking, this experiment is ideal for physics and optical information technology courses. It comes with detailed instructional materials and has strong potential for widespread adoption in educational settings.
Technical Specifications:
- Temperature measurement resolution: 0.1°C
- Temperature difference potential resolution: 1mV
- Cooling plate with anti-air heating protection
- 128x128 dot matrix LCD display
- Heating time options: 30s, 60s, 120s, 240s
Name of the Device: Seebeck Effect Tester
Developed by: Physics Experiment Center, School of Science, Beijing Jiaotong University
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Twist tie with basket
Specification
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Size/ mm
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Weight/ kg
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Pcs/ Carton
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Carton Size/ cm
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0.4 x 3 x 30
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0.113
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24
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36 x 24 x 16
|
|
0.4 x 3 x 75
|
0.185
|
24
|
36 x 24 x 16
|
|
0.4 x 3 x 100
|
0.226
|
24
|
43 x 28 x 16
|
Small coil wire
Specification
Foam wire
Specification
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Size
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Color
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Φ7mm x 10m
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Green
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Garden Wire on Wooden Stick
Specification
PE Foam Wire,Galvanized Iron Wire With Wooden Stick,Garden PE Twist Tie,Garden Wires
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