Description:FIELD OF THE INVENTION
This invention relates to Advanced Thermoelectric Generator (TEG) for Efficient Waste Heat Recovery and Power Generation
BACKGROUND OF THE INVENTION
The increasing demand for sustainable energy highlights the need for efficient waste heat recovery. Current thermoelectric generators (TEGs) suffer from low efficiency, poor thermal conductivity management, and limited scalability. The proposed invention addresses these issues by introducing novel thermoelectric materials, enhanced thermal management, and scalable architecture to improve TEG performance.
Many current approaches have been put forward to alleviate the problems regarding effective waste heat recovery with TEGs. Below are some key technologies and their associated limitations:
1. Bismuth Telluride (Bi₂Te₃) Thermoelectrics:
• Description: For the RT (Room Temperature) applications, Bi₂Te₃ has been the typical thermoelectric material.
• Limitations: Indeed, because of its relatively low thermoelectric figure of merit (ZT), the efficiency decreases at higher temperatures. This puts a constraint into its use at high temperatures and thus not so useful in industrial waste heat recovery.
2. Silicon-Germanium (SiGe) Alloys:
• Description: SiGe alloys are preferred in high-temperature thermoelectrics; applications include aerospace and space exploration.
• Limitations: While these alloys are ideal for high-temperature uses, they are accompanied with great demerits including high cost of raw material and possibility of complex production methods which make their usability unfeasible in bulk production or even in commercial channels.
3. Half-Heusler Alloys:
• Description: These alloys have higher thermoelectric efficiency at high temperature than that of Bi₂Te₃.
• Limitations: Even at these higher temperatures they are not without problems and still seeing how the electrical and thermal conductivity along with the Seebeck coefficient can be optimised. Also they are relatively expensive and difficult to process hence their restricted application.
4. Organic Thermoelectrics:
• Description: Conductive organic materials have been investigated with the interest in low cost, readily fabrication compared to inorganic thermoelectrics.
• Limitations: Organic thermoelectrics are generally low efficiency products and are unable to be used in commercial products due to poor thermoelectric efficiency.
5. Thermoelectric Generator Device and Method (Patent):
• Description: This patent describes an improved thermoelectric generator design for an array of thermoelectric materials with improved interfaces to increase efficiency of designed geometry of the material.
• Limitations: While the architecture leads to some enhancements of power factors, the main benefits regarded the efficiency enhancements are not so significant as in the other more progressive thermoelectric materials.
Differences Compared to Previous and Current Solutions
Feature
Current Solutions
Proposed Invention

Efficiency Low efficiency, especially at high temperatures Significant increase in efficiency due to optimized ZT and thermal management
Thermal Management Basic heat sinks and simple structures Advanced heat exchange system with modular and scalable design
Scalability Limited scalability, costly for large-scale use Modular, scalable for various applications (automotive, industrial, electronics)
Cost High manufacturing costs for advanced materials Cost-effective due to optimized material design and modular approach
Energy Conversion Stability Fluctuations in power output due to temperature changes Integrated power electronics for stable energy conversion
Efficiency Low efficiency, especially at high temperatures Significant increase in efficiency due to optimized ZT and thermal management
• The current invention proposed to remedy the deficits in the existing thermoelectric materials and system through material selection, proper heat dissipation, and the concept of modularity to allow scaling up. This leads finally to a significantly more efficient, economic, and stable concept for waste heat recovery and energy conversion.
SUMMARY OF THE INVENTION
This summary is provided to introduce a selection of concepts, in a simplified format, that are further described in the detailed description of the invention.
This summary is neither intended to identify key or essential inventive concepts of the invention and nor is it intended for determining the scope of the invention.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.
Introducing a novel thermoelectric generator known as TEG with a novel class of thermoelectric material and a sophisticated thermal control mechanism. The key features of this invention include:
1. Thermoelectric Material Design:
The invention employs a recently synthesized composite material consisting of high-performance nanostructured thermoelectrics which improve electrical conductivity and the Seebeck coefficient simultaneously. In addition, it drastically decreases the thermal conductivity, thus increasing the thermoelectric figure of merit (ZT) and consequently efficiency at both high and low differential temperature.
2. Enhanced Thermal Management System:
The system includes an advanced design of the heat exchanger that determined the temperature differential across the thermoelectric material. This comprises heat sink novelty, cool-running active parts, and thermally insulated multi-layered structure to drive a large temperature difference between hot and cold sides of the generator.
3. Modular and Scalable Architecture:
That is, the TEG system is composed of sub-systems with modularity characteristic which makes it easy to scale or resize for other applications. This modularity helps simplify its use in different industrial lines, automobiles and home appliances.
4. Integrated Power Electronics:
Integrated power electronics are used by the generator to control the charge output and also the electrical power distribution from the TEG to other devices. This makes certain that efficiency of the process of energy conversion remains steady even when the temperature is in a state of change.
This results in a more efficient, robust, and much less expensive TEG system that greatly enhances waste heat recovery for a plethora of uses ranging from industrial processes to off-grid electricity in the developed world.
BRIEF DESCRIPTION OF THE DRAWINGS
The illustrated embodiments of the subject matter will be understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
FIGURE 1: SYSTEM ARCHITECTURE
The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION OF THE INVENTION
The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In addition, the descriptions of "first", "second", “third”, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Introducing a novel thermoelectric generator known as TEG with a novel class of thermoelectric material and a sophisticated thermal control mechanism. The key features of this invention include:
1. Thermoelectric Material Design:
The invention employs a recently synthesized composite material consisting of high-performance nanostructured thermoelectrics which improve electrical conductivity and the Seebeck coefficient simultaneously. In addition, it drastically decreases the thermal conductivity, thus increasing the thermoelectric figure of merit (ZT) and consequently efficiency at both high and low differential temperature.
2. Enhanced Thermal Management System:
The system includes an advanced design of the heat exchanger that determined the temperature differential across the thermoelectric material. This comprises heat sink novelty, cool-running active parts, and thermally insulated multi-layered structure to drive a large temperature difference between hot and cold sides of the generator.
3. Modular and Scalable Architecture:
That is, the TEG system is composed of sub-systems with modularity characteristic which makes it easy to scale or resize for other applications. This modularity helps simplify its use in different industrial lines, automobiles and home appliances.
4. Integrated Power Electronics:
Integrated power electronics are used by the generator to control the charge output and also the electrical power distribution from the TEG to other devices. This makes certain that efficiency of the process of energy conversion remains steady even when the temperature is in a state of change.
This results in a more efficient, robust, and much less expensive TEG system that greatly enhances waste heat recovery for a plethora of uses ranging from industrial processes to off-grid electricity in the developed world.
Figure 1 depicts a schematic diagram of a thermoelectric generator (TEG), showcasing its fundamental components: of n-type and p-type thermoelectric materials. These materials form the basis of thermoelectricity, that is converting heat into electricity.
In a TEG, the n-type material is able to move electrons whereas the p-type material does ‘holes’ (or vacancies that can move and carry positive charges). When a temperature difference is impressed across the materials a flow charge carrier (electron and holes) gives rise to an electrical current through the so called Seebeck effect by which heat energy is converted into electrical energy. Perhaps the diagram shows the manner in which the n-type and p-type materials are connected either in series or parallel to develop a voltage difference. The efficiency of this conversion is defined by the temperature differential at hot end and cold end of the thermoelectric materials. In this schematic, it also shows how another position of materials or heat exchanger/thermal management system is also important regarding how much the heat conduction will increase, as this is very important when it comes to the TEG’s efficiency.
Figure 2 shows a more detailed view of the typical structure of a thermoelectric generator present work. It demonstrates how thermoelectric materials, including the n-type and p-type materials, are electrically connected in series, which indicate that thermoelectric modules are connected in series even though they can also be joined in parallel as well. This arrangement enable those generated voltage produced by the n-type and p-type combine ant as a whole to produce a higher voltage to the generator.
The structure also includes the heat sinking, which serves to remove heat from the ‘‘cold’’ side of TEG so as to ensure that there exists a large temperature differential across the thermoelectric materials. The hot section of the generator experiences high temperature in the form of heat energy from the heat source such as the exhaust gases, industrial waste heat or other forms of high heat generating systems whereas the cold side is maintained at relatively low temperatures and by use of heat exchangers/cooling systems. Therefore, the heat differential across the thermoelectric materials is what makes it to produce the electricity.
The modularity, described in the system description, is visible in the diagram, where singular thermoelectric modules can be added or removed according to the TEG scale. They also lend the TEG system the ability for use across the spectrum of small-scale, off-grid access to energy to industrial waste heat usage.
Put together, the two figures explicate the typical mode of functioning and design of a thermoelectric generator, with focus on these attributes that define and characterise this invention: the materials, heat control, and the scalability for use of waste heat for electricity generation.
How It Works: How does Thermoelectric Generator (TEG) work:
Step – I: Heat Source:
Description: The heater gives a thermal energy component to the system. It could be waste heat from some industrial processes, car emissions, or any other high temperature application.
Function: The Hubbard that delivers the thermal energy to TEG and produces the temperature difference across the hot side and the cold side of the thermoelectric material.

Step – II: Thermoelectric generator briefly known as TEG;)
Description: The core of the system in which heat flows between hot side, which can be exposed to heat source and the cold one which is cooled by the cold source and this flow of heat result to electrical potential through the Seebeck effect. The TEG has n-type and p-type materials connected in series or in parallel to another one.
Function: The technology known as TEG converts thermal energy into electrical energy. The electrical current produced is defined by the difference in temperature, Seebeck coefficient, and the figure of merit (ZT) of the materials that is used.

Step – III: Cold Source
Description: On the cold side of the TEG the cold source keeps the temperature low. This can be done by means of an active cooling system, a heat exchanger or much cooler air outside the premises.
Function: Fullfills the need for a low temperature on the cold side of the TEG needed to sustain the temperature differential, the key factor affecting the TE conversion efficiency.

Step – IV: Heat Exchanger
Description: An essential part of the system of thermal control, which enables heat transfer from the hot source to the materials thermoelectric. It also controls the heat from cold side and ensure that difference in the temperatures is maintained.
Function: To regulate the temperature difference across the TEG and thrust the heated end higher to maintain a sufficient range for thermoelectric performance, the heat exchanger is used.

Step – V: Integrated Power Electronics
Description: This contains converters that operate in direct current to direct current, voltage regulators, and power control circuits.
Function: Remotely controls the electrical output of the TEG to maintain balance in converting electrical energy. The system regulates the voltage and the current to produce appropriate DC load requirement.
Step – VI: DC-DC Converter
Description: A device that regulates, modifies as well as converts the voltage levels of the TEG to the proper output voltage that can suit the load requirements.
Function: Stabilizes the output voltage obtained from the TEG thereby increasing the efficiency of energy conversion.
Step – VII: DC Load
Description: Stands for load appliance that is used to consume the electrical energy generated by the TEG. This might therefore be in form of industrial equipment, domestic use appliances, or battery recharging facilities.
Function: The electrical energy produced by the TEG is used by the load which is present at the DC loads to complete the power generation cycle.
The invention specifies a nanocomposite structure that increases the efficiency of converting energy by raising the electrical conductivity and the Seebeck coefficient while lowering thermal conductivity. Under normal circumstances, this leads to better efficiency compared to conventional materials. These designs available in the system comprise heat sinks, active cooled, and insulated to establish a considerable temperature difference between the hot side and cold side of the thermoelectric generator to enhance the efficiency of the power produced. The TEG system can also have several units operating simultaneously, and all components are meant to be easily scalable for varying applications. For both small devices and industrial systems, the design provides the opportunity to choose an energy generating path. Integrated power electronic converter is also used in the generator to maintain the conversion of electrical power without the need for a power supply control box, thus, flexible in use and efficient with varying temperature. The invention has industrial applications, which enable the recycling of waste heat and converting it to electricity therefore cutting on the use of fossil energy sources. This subsequently reduces carbon footprint and make the energy system more sustainable. It also reduces the price of production for industries and specific applications where use of thermoelectric power generation is feasible. The application of the presented system can be observed in manufacturing, auto industry, renewable energy industry and electronics industry to name a few where there is a demand to capture waste heat and convert the captured waste heat into electrical energy. This advanced TE generator is a scalable, efficient and low cost system for waste heat retrieval and conversion and thus can be applied in multiple industries.
The innovation of this invention is said to be centered on the integration of new generation thermoelectric materials together with progressive thermal control technologies. The development of a new nanostructured composite material which can increase the Seebeck coefficient and decrease thermal conductivity is a breakthrough. Moreover, the modularity and scalability of TEG, Ps and integrated power electronics make the opportunities of further TEGs application in industries different from the current ones without limitations. These features lead to a significant enhancement of the energy conversion efficiency of waste heat so that the recovery of waste heat becomes economically more feasible in numerous sectors.
This invention is likely to greatly impact the existing waste heat recovery systems or technologies whereby energy that cannot be used is collected and turned to another use by industries. It also bounds a lot of benefits in terms of contribution to environmentalism over the use of fossil fuels and increasing the overall sustainability of many industries. In addition, the enhanced efficiency may further reduce the costs of TEGs positioning them as a better source of power compared to other available energy recovery systems thus expanding the market for clean energy technologies.
ADVANTAGES OF THE INVENTION
1. High Reliability:
TEGs, unlike many power generation processes, are solid-state devices that have no moving parts – that means that their reliability is significantly higher than that of comparable machines; they also require far less maintenance.
2. Wide Range of Fuel Sources:
Organizations can use TEGs to generate electricity cheaply across a range of heat sources including industrial waste heat, natural or renewable energy input.
3. Scalability:
TEGs can be made to supply power from milliwatts (mW) to kilowatts (KW), making it possible for expansion from low-energy use gadgets to high-energy devices.
4. Direct Energy Conversion:
Unlike other technologies, TEGs harness electricity directly exclusively from heat generated by the Seebeck effect. This raises the efficiency of conversion of energy more than in any other plant.
5. Silent Operation:
TEGs are non-conditioned and do not generate any noises, thus suitable for environments that require the mitigation of noises such as medical instruments, sensors or in homes.
6. Compact Size:
TEGs have very low-profile designs, which makes it possible to incorporate them in power applications with size restrictions for example portable power applications, automotive and remote power applications.
7. Operable in Extreme Conditions:
TEGs can also operate at high and low temperatures as well as in condition of no gravity or conditions other than normal gravity. This makes them suitable for application in space, in depths of the seas or oceans and also in remote off-grid living zones.
, Claims:1. A thermoelectric generator (TEG) system comprising: a. A thermoelectric material with a nanostructured composite composition, configured to enhance electrical conductivity and the Seebeck coefficient while reducing thermal conductivity; b. A thermal management system including a heat exchanger, heat sink, and multi-layered insulation to optimize the temperature differential across the thermoelectric material; c. A modular and scalable architecture allowing for integration into various applications; d. Integrated power electronics to regulate the output and enhance energy conversion efficiency.
2. The TEG system as claimed in claim 1, wherein the thermoelectric material comprises high-performance nanostructured n-type and p-type materials electrically connected in series or parallel to optimize power output.
3. The TEG system as claimed in claim 1, wherein the thermal management system includes an active cooling mechanism to maintain a lower temperature at the cold side.
4. The TEG system as claimed in claim 1, wherein the modular design allows for addition or removal of thermoelectric modules based on power requirements.
5. The TEG system as claimed in claim 1, wherein the heat exchanger includes a specially designed structure to maximize heat dissipation from the hot side and ensure a consistent temperature gradient.
6. The TEG system as claimed in claim 1, further comprising a DC-DC converter that stabilizes and optimizes the electrical output voltage for different load requirements.
7. The TEG system as claimed in claim 1, wherein the integrated power electronics include voltage regulators and power control circuits to manage electrical distribution to connected loads.
8. The TEG system as claimed in claim 1, wherein the system is configured for use in industrial applications, automotive power recovery, home appliances, and remote power generation.
9. The TEG system as claimed in claim 1, wherein the thermoelectric materials are positioned within an optimized thermal configuration to increase efficiency in converting waste heat to electricity.
10. The TEG system as claimed in claim 1, wherein the system operates efficiently under extreme environmental conditions including high temperatures, low temperatures, and zero gravity environments.