THERMOSIPHON BASED SOLAR COOKING STOVE WITH FINNED GRIDDLE FOR ENHANCED HEAT TRANSFER

Abstract

ABSTRACT The present disclosure introduces a thermosiphon based solar cooking stove 100 that operates efficiently using a thermic fluid 106 circulated by natural convection without external power. The stove features a griddle with internal rectangular fins 102 designed to maximize heat transfer across the cooking surface. Rectangular fins 104 within the griddle further enhance heat exchange by increasing surface area, ensuring even temperature distribution for improved cooking efficiency. The thermic fluid enters the system through the inlet of heat transfer fluid 108 and exits via the outlet of heat transfer fluid 110, creating a continuous flow. A solar concentrator 112 captures solar energy and heats the thermic fluid, initiating the thermosiphon cycle. This unique configuration supports sustainable, off-grid cooking applications, offering a practical system for rural and remote areas with abundant sunlight. Reference Fig 1

Specification

Description:DETAILED DESCRIPTION

[00024] The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognise that other embodiments for carrying out or practising the present disclosure are also possible.

[00025] The description set forth below in connection with the appended drawings is intended as a description of certain embodiments of thermosiphon-enhanced solar cooking stove with finned griddle for optimized heat transfer and is not intended to represent the only forms that may be developed or utilised. The description sets forth the various structures and/or functions in connection with the illustrated embodiments; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimised to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[00026] While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.

[00027] The terms "comprises", "comprising", "include(s)", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, or system that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or system. In other words, one or more elements in a system or apparatus preceded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.

[00028] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings and which are shown by way of illustration-specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.

[00029] The present disclosure will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the description with unnecessary detail.

[00030] Referring to Fig. 1 and Fig. 2, thermosiphon based solar cooking stove with finned griddle for optimized enhanced heat transfer 100 is disclosed, in accordance with one embodiment of the present invention. It comprises of griddle with internal rectangular fins 102, rectangular fins 104, thermic fluid 106, inlet of heat transfer fluid 108, outlet of heat transfer fluid 110 and solar concentrator 112.

[00031] Referring to Fig. 1 and Fig. 2, the present disclosure provides details of a thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100. This stove operates by using thermic fluid 106 to transfer heat without external power, making it ideal for off-grid applications. In one embodiment, the solar cooking stove 100 comprises of essential components such as the griddle with internal fins 102, designed to maximize the heat transfer surface area for faster cooking. The fins 104 within the griddle further enhance thermal efficiency by distributing heat evenly. Other components like inlet of heat transfer fluid 108 and outlet of heat transfer fluid 110 facilitate the natural circulation of thermic fluid 106 within the system. A solar concentrator 112 captures solar energy to heat the thermic fluid 106, enabling efficient cooking powered by renewable energy. This setup provides a practical, eco-friendly system for communities with abundant sunlight.

[00032] Referring to Fig. 1 and Fig. 2, thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 is provided with griddle with internal fins 102, which serves as the primary cooking surface. The griddle's 102 internal fins increase the surface area for heat transfer, allowing more efficient conduction of heat from the thermic fluid 106 to the cooking surface. This component 102 plays a crucial role in achieving uniform heat distribution, which improves cooking speed and quality. By working in conjunction with the fins 104, the griddle 102 maintains an even temperature, enhancing the overall thermal efficiency of the system. The design of griddle with internal fins 102 is optimized to harness maximum solar energy captured by the solar concentrator 112.

[00033] Referring to Fig. 1 and Fig. 2, thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 is provided with fins 104, which are positioned within the griddle 102 to further enhance heat transfer. In different embodiments, rectangular or similar elongated shapes are preferred to enhance the thermal contact area within the griddle. The number of fins 104 vary in different embodiments. A limited number of internal fins, generally between 2 and 6, are positioned within the griddle to enhance the heat transfer surface area.These fins 104 are essential in increasing the griddle's effective surface area, facilitating faster heat conduction. In different embodiment, different dimension of rectangular fins are provided. Each fin 104 has a length ranging from a few centimeters at the base to tip, with a thickness that supports effective thermal conductivity and structural integrity. Additionally, fins 104 are designed with varied widths in different embodiments to optimize heat distribution, typically within a range suitable for maximizing surface area without compromising flow dynamics. The fins 104 work in synergy with the griddle with internal fins 102 to ensure that heat from the thermic fluid 106 is efficiently transferred to the food. By extending the thermal exchange area, these fins 104 contribute significantly to reducing cooking time. Additionally, their configuration within the griddle ensures minimal resistance to the natural flow of thermic fluid 106.

[00034] Referring to Fig. 1, thermosiphon-enhanced solar cooking stove with finned griddle for optimized heat transfer 100 is provided with thermic fluid 106, a heat-transfer medium that circulates within the system, driven by thermosiphon principles. In different embodiments, thermally stable, commercially available heat transfer fluid which is compatible with high-temperature applications and provide effective heat transfer properties is chosen as thermic fluid 106. In one of the embodiments, Shell "Thermia S2" is used as the thermic fluid 106, providing high thermal stability and effective heat transfer properties. The thermic fluid 106 absorbs solar energy transferred from the solar concentrator 112 and flows through the inlet 108 and outlet 110. This natural circulation requires no external power, making it ideal for sustainable cooking applications. Across different embodiments, the velocity of the thermic fluid 106 is maintained at a level conducive to steady heat transfer through natural convection, generally within a low to moderate speed range. In one of the embodiments, the velocity of the thermic fluid 106 is maintained at 2.5 cm/s, ensuring steady and efficient heat transfer through natural convection. As the thermic fluid 106 passes through the griddle with internal fins 102, it facilitates efficient heat transfer to the cooking surface, supporting a renewable, off-grid cooking systen.

[00035] Referring to Fig. 1, thermosiphon-enhanced solar cooking stove with finned griddle for optimized heat transfer 100 is provided with inlet of heat transfer fluid 108, which serves as the entry point for the thermic fluid 106 into the system. This inlet allows heated fluid to flow naturally toward the griddle with internal rectangular fins 102. The placement of the inlet 108 ensures a smooth entry for the thermic fluid 106, enhancing the circulation of heat within the stove. Working in conjunction with the outlet 110, the inlet 108 maintains continuous flow and effective thermosiphon-based heat transfer, supporting the overall thermal efficiency of the stove.

[00036] Referring to Fig. 1, thermosiphon-enhanced solar cooking stove with finned griddle for optimized heat transfer 100 is provided with outlet of heat transfer fluid 110, which facilitates the exit of the thermic fluid 106 from the griddle area, allowing for continuous fluid circulation. This outlet works alongside the inlet 108 to create a natural thermosiphon flow, eliminating the need for external pumps. The outlet 110 is positioned to maximize the efficient flow of the thermic fluid 106 as it completes its heat transfer cycle within the griddle with internal fins 102. This setup ensures the fluid is consistently recirculated, maintaining optimal heat levels for cooking.

[00037] Thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 is provided with solar concentrator 112(not shown in the drawings), which captures solar energy and converts it into thermal energy. In different embodiment, concentrator 112 can handle varying levels of heat flux from solar energy, providing effective heating for the system. In one of the embodiments, the system operates with a heat flux of approximately 1000 W, effectively utilizing solar energy for rapid heating. This thermal energy heats the thermic fluid 106, initiating the natural thermosiphon circulation within the stove. The solar concentrator 112 is critical for supplying continuous heat, enabling the system to operate without any external power source. The heated fluid flows through the inlet 108 to reach the griddle with internal rectangular fins 102, where it transfers heat effectively, enhancing the stove's eco-friendly cooking capabilities

[00038] Referring to Fig 3, there is illustrated method 200 for thermosiphon-enhanced solar cooking stove with finned griddle for optimized heat transfer 100. The method comprises:
At step 202, method 200 includes solar energy being absorbed by the solar concentrator 112, converting it into thermal energy to heat the thermic fluid 106;
At step 204, method 200 includes the heated thermic fluid 106 entering the system through the inlet of heat transfer fluid 108 to circulate naturally through the thermosiphon process;
At step 206, method 200 includes the thermic fluid 106 transferring its heat to the griddle with internal fins 102, facilitating efficient heat transfer to the cooking surface;
At step 208, method 200 includes the rectangular fins 104 within the griddle with internal fins 102 further increasing the heat exchange surface area, distributing heat evenly across the griddle surface;
At step 210, method 200 includes the heated griddle with internal rectangular fins 102 conducting heat to the food on the cooking surface, reducing cooking time and improving cooking efficiency;
At step 212, method 200 includes the thermic fluid 106 exiting the griddle 102 area through the outlet of heat transfer fluid 110 after transferring its heat, allowing continuous circulation within the system;
At step 214, method 200 includes the thermic fluid 106 recirculating to the solar concentrator 112 to reheat, sustaining a continuous thermosiphon-based flow for efficient, off-grid cooking.

[00039] Following are the advantages of the present invention
• Purely Renewable Energy System
• Adoptable Heat Management
• Rural Development
• Low Cost
• Locally Available

[00040] In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "fixed" "attached" "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected, either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

[00041] Modifications to embodiments of the present disclosure described in the foregoing are possible without departing from the scope of the present disclosure as defined by the accompanying claims. Expressions such as "including", "comprising", "incorporating", "have", "is" used to describe and claim the present disclosure are intended to be construed in a non- exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural where appropriate.

[00042] Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the present disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
, Claims:WE CLAIM:
1. A thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 comprising of
griddle with internal fins 102 to provide the primary cooking surface with enhanced heat transfer capabilities;
rectangular fins 104 to increase the heat exchange surface area within the griddle;
thermic fluid 106 to act as the heat-transfer medium circulating through the system;
inlet of heat transfer fluid 108 to allow entry of heated thermic fluid into the cooking system;
outlet of heat transfer fluid 110 to facilitate the exit of thermic fluid after heat transfer; and
solar concentrator 112 to capture solar energy and convert it into thermal energy for heating the thermic fluid.
2. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein griddle with internal fins 102 is configured to maximize heat transfer efficiency by increasing surface area, enhancing uniform heat distribution across the cooking surface for faster and more consistent cooking.

3. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein fins 104 within the griddle with internal fins 102 are positioned to further increase heat exchange surface area, ensuring efficient heat conduction from the thermic fluid 106 to the cooking surface without disrupting thermosiphon flow.

4. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein thermic fluid 106 acts as the primary heat-transfer medium, circulating naturally within the system to convey solar-derived thermal energy to the griddle, eliminating the need for external power sources.

5. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein inlet of heat transfer fluid 108 is configured to allow precise entry of heated thermic fluid into the griddle area, maintaining an efficient thermosiphon flow for optimal thermal performance.

6. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein outlet of heat transfer fluid 110 facilitates the exit of thermic fluid after it has transferred its heat to the griddle, supporting a continuous and uninterrupted thermosiphon cycle.

7. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein solar concentrator 112 is configured to capture and convert solar energy into thermal energy, supplying heat to the thermic fluid 106 and initiating the natural thermosiphon circulation.

8. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein griddle with internal rectangular fins 102 in combination with rectangular fins 104 provides an optimized heat transfer mechanism, allowing even temperature distribution and minimizing cooking time.

9. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein the system operates solely on thermosiphon principles, leveraging the natural convection of thermic fluid 106 to enable an eco-friendly, off-grid cooking solution without reliance on electrical or mechanical components.

10. The thermosiphon based solar cooking stove with finned griddle for enhanced heat transfer 100 as claimed in claim 1, wherein method comprises of
solar concentrator 112 reflecting solar energy and converting it into thermal energy to heat the thermic fluid 106;
heated thermic fluid 106 entering the system through the inlet of heat transfer fluid 108 to circulate naturally through the thermosiphon process;
thermic fluid 106 transferring its heat to the griddle with internal fins 102, facilitating efficient heat transfer to the cooking surface;
rectangular fins 104 within the griddle with internal fins 102 further increasing the heat exchange surface area, distributing heat evenly across the griddle surface;
heated griddle with internal rectangular fins 102 conducting heat to the food on the cooking surface, reducing cooking time and improving cooking efficiency;
thermic fluid 106 exiting the griddle area through the outlet of heat transfer fluid 110 after transferring its heat, allowing continuous circulation within the system; and
thermic fluid 106 recirculating to the solar cooking stove to reheat, sustaining a continuous thermosiphon-based flow for efficient, off-grid cooking.

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