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New Concept of Power Generation Using TEGs: Thermal Modeling, Parametric Analysis, and Case Study.

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This study explores generating electricity using thermoelectric generators (TEGs) powered by HVAC exhaust and solar energy. A promising configuration can produce 3.8W, offering environmental and economic benefits.

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Area of Science:

  • Energy Harvesting
  • Thermoelectric Generation
  • Sustainable Energy Systems

Background:

  • Heating, Ventilating, and Air-Conditioning (HVAC) systems generate waste heat.
  • Solar irradiation is a readily available renewable energy source.
  • Thermoelectric generators (TEGs) offer a solid-state solution for converting heat differences into electricity.

Purpose of the Study:

  • To evaluate an innovative concept for power generation using TEGs.
  • To utilize waste heat from HVAC systems and solar irradiation.
  • To perform parametric analysis and thermal modeling for optimal configuration.

Main Methods:

  • One-dimensional steady-state heat diffusion equation with various boundary conditions.
  • Parametric analysis of TEG power generation for different configurations.
  • Thermal modeling of the proposed system under specific conditions.

Main Results:

  • The optimal configuration involves a TEG module with hot and cold fluid exposure on opposite faces.
  • A 40 × 40 cm² flat plate achieved 3.8 W of electrical power under 2000 W/m² solar radiation and 20 kW cooling load.
  • The system demonstrates a 3-year payback period and reduces CO₂ emissions by approximately 1 ton annually.

Conclusions:

  • The proposed TEG system effectively harnesses HVAC exhaust and solar energy for power generation.
  • The configuration is economically viable, offering monthly savings and a reasonable payback period.
  • This approach presents a sustainable solution for reducing carbon footprint and energy costs.