Description:FIELD OF INVENTION:
[0001] The present disclosure generally relates to solar water heating technology, and more particularly, to a water heating system and method that utilize solar radiation to heat water.

BACKGROUND OF THE INVENTION:
[0002] Solar energy has gained significant attention as a renewable and sustainable source of power for various applications, including water heating systems. Solar water heating systems utilize the sun's radiation to heat water for domestic, commercial, and industrial purposes. These systems typically consist of a solar collector unit that captures and concentrates solar radiation, and a water heater unit that absorbs the concentrated energy to heat the water. The efficiency of solar water heating systems depends on various factors, including the design of the collector, the heat transfer mechanism, and the overall system configuration.

[0003] In conventional solar water heating systems, the solar collector unit often employs flat plate collectors or evacuated tube collectors to capture solar radiation. The solar radiation is then transferred to a working fluid, typically water or a heat transfer fluid which circulates through the system. However, these systems face significant challenges. The primary issue is the need for fluid circulation, which introduces complexity and energy consumption. Whether circulating the working fluid or a separate heat transfer fluid, the process inevitably leads to heat loss during transport. This circulation requirement not only reduces overall system efficiency but also necessitates additional components such as pumps, increasing both initial costs and maintenance requirements. Furthermore, the reliance on active circulation makes these systems vulnerable to failures and less suitable for off-grid or remote applications where simplicity and reliability are crucial.

[0004] Despite the advancements in solar water heating technology, several challenges persist in the design and implementation of these systems. A primary issue is the uneven distribution of heat throughout the system. This problem arises due to inadequate heat transfer mechanisms within the water heater unit, leading to temperature stratification and reduced overall efficiency. Additionally, the solar collector unit may not effectively capture and concentrate all the available solar radiation, resulting in suboptimal energy utilization.

[0005] Another significant challenge in solar water heating systems is the lack of precise temperature control. Many systems struggle to maintain a consistent water temperature, especially during periods of varying solar intensity or fluctuating demand. This can lead to either underheating, which fails to meet the desired temperature requirements, or overheating, which may cause safety concerns and energy waste.

[0006] The durability and maintenance requirements of solar water heating systems also present ongoing challenges. Conventional systems may be prone to corrosion, scaling, and fouling, particularly in regions with hard water or high mineral content. These issues can significantly reduce the system's efficiency and lifespan, necessitating frequent maintenance and potential component replacements. Additionally, the complexity of some systems makes them less suitable for off-grid or rural applications, where simplicity and reliability are crucial factors.

[0007] Existing solar water heating systems still face limitations in terms of uniform heat distribution, efficient solar radiation collection, and suitability for off-grid or rural applications. Many systems struggle to provide water that is safe for drinking, lack materials that can withstand high temperatures while maintaining good strength, fail to distribute heat uniformly throughout the heater, and lack precise temperature control.

[0008] Therefore, there is a need to overcome the problems discussed above by developing a solar water heating system that addresses the challenges of uneven heat distribution, inefficient solar radiation collection, provide drinkable water, and lack of precise temperature control. Such a system should be designed to maximize heat transfer efficiency, ensure uniform heating, and operate reliably in various environmental conditions.

OBJECT OF THE INVENTION:

[0009] The primary objective of the present disclosure is to provide a water heating system that equally distributes heat over the entire system using solar radiation, resulting in drinkable water after heating.

[0010] Another objective of the present disclosure is to provide a modern solution for off-grid passive heating without requiring external energy input or circulation.

[0011] Yet another objective of the present disclosure is to provide an unmet need in decentralized solar water purification systems through a simplified design suitable for field fabrication and low-cost deployment.

[0012] Still another objective of the present disclosure is to provide corrosion resistance and hygienic suitability for water treatment.

[0013] Yet another objective of the present disclosure is to provide a water heater unit with integrated radial fins for enhanced and uniform heat transfer throughout the water volume.

[0014] Yet another objective of the present disclosure is to provide a precise temperature control mechanism that releases water when it reaches the desired temperature.

[0015] Yet another objective of the present disclosure is to provide a system capable of heating water to temperatures suitable for thermal disinfection, making it safe for drinking.

[0016] Yet another objective of the present disclosure is to provide a fully automated system that operates without external energy input, enabling its use in rural and off-grid applications.

[0017] Yet another objective of the present disclosure is to provide a compact and modular design that facilitates easy transportation, installation, and scalability for various capacity needs.

[0018] Yet another objective of the present disclosure is to provide a durable and low-maintenance solution that can withstand harsh environmental conditions and varying water qualities.

SUMMARY OF THE INVENTION:

[0019] According to one objective of the present disclosure, a water heating system for heating water using solar radiation is provided. The system comprises a solar collector unit configured to collect and concentrate solar radiation. A water heater unit is positioned at a focal point of the solar collector unit. The water heater unit comprises a cylindrical body made from stainless steel and integrated radial fins within the cylindrical body to enhance heat transfer. The water heater unit is configured to release the water before it reaches the boiling point of water.

[0020] The water heating system further comprises a data logger and solenoid valve. The data logger is configured to monitor the temperature of water by a temperature sensor and send a command to the solenoid valve to release the water. This configuration allows for precise control of the water temperature and automated release of heated water.

[0021] In a further aspect of the water heating system, the heater unit has a capacity to handle a volume of 15 liters, a diameter of 44.3 cm, and a height of 10 cm. These specific dimensions ensure optimal performance and efficiency of the system for its intended application.

[0022] The integrated radial fins in the water heating system are welded symmetrically within the cylindrical body. The stainless steel used is SS316 grade, ensuring corrosion resistance and hygienic suitability for water treatment. This feature addresses concerns related to water quality and safety.

[0023] The water heater unit of the system operates in a passive mode without active circulation or stirring. The entire system operates without external energy input, enabling off-grid passive heating. This feature makes the system suitable for use in remote or rural areas without access to conventional power sources.

[0024] The water heating system is designed for a water purification unit for rural applications. It heats water to a temperature up to 90°C and is configured for thermal disinfection of water. This capability enhances the system's utility in providing safe drinking water in areas with limited resources.

[0025] According to another objective of the present disclosure, a method of heating water using the water heating system is provided. The method comprises collecting and concentrating solar radiation using the solar collector unit, heating water in the water heater unit to the threshold value, monitoring the water temperature using the temperature sensor, sending a command from the data logger to the solenoid valve when the threshold value is reached, and opening the solenoid valve to release the heated water.

[0026] The method further comprises thermally disinfecting the water during the heating process. Further, the heating process induces precipitation of hardness-causing salt from the water. This feature helps in softening the water, potentially improving its taste and reducing scale buildup in the system.

[0027] The method also includes operating the entire water heating system without external energy input in an off-grid, rural application. This aspect emphasizes the system's suitability for use in remote areas lacking conventional infrastructure.

[0028] The foregoing paragraphs have been provided by way of general introduction and are not intended to limit the scope of the following claims. The described embodiments, together with further advantages, will be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS:
FIG. 1 illustrates an exemplary embodiment of a solar water heating system in accordance with the present disclosure.
FIG. 2 illustrates various views and components of a water heating unit in accordance with an exemplary embodiment of the present disclosure.
FIG. 3 illustrates a flow diagram of a method for heating water using the solar water heating system in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION:
[0029] Aspects of the present disclosure are best understood by reference to the description set forth herein. All the aspects described herein will be better appreciated and understood when considered in conjunction with the following descriptions. It should be understood, however, that the following descriptions, while indicating preferred aspects and numerous specific details thereof, are given by way of illustration only and should not be treated as limitations. Changes and modifications may be made within the scope herein without departing from the spirit and scope thereof, and the present disclosure herein includes all such modifications.

[0030] The present invention provides a solar water heating system designed to address the challenges of conventional systems while offering a sustainable solution for both water heating and purification, particularly in off-grid and rural areas. The system comprises a cylindrical water heater unit made of SS316 grade stainless steel, featuring internally integrated radial fins that significantly enhance heat transfer and ensure uniform temperature distribution. This unit is positioned at the focal point of a solar collector, which efficiently captures and concentrates solar radiation. The system operates passively, eliminating the need for pumps or external power sources, thus making it ideal for remote locations.

[0031] Further, the system provides precise temperature control mechanism, comprising a data logger, temperature sensor, and solenoid valve. This automated system monitors the water temperature and releases the heated water before it reaches boiling point, ensuring safety and maintaining water quality. The heating process not only provides hot water but also achieves temperatures high enough for thermal disinfection, making the water safe for drinking. The entire system is designed for simplicity, durability, and ease of maintenance, with a modular structure that allows for easy transportation and scalability. This invention represents a significant advancement in solar water heating technology, offering a comprehensive solution that combines efficient heating, water purification, and off-grid functionality in a single, user-friendly system.

[0032] Now referring to FIG. 1, which illustrates the water heating system (100) of the present invention. The system comprises several key components working together to provide an efficient, off-grid solution for water heating and purification. The system includes a solar collector unit (10) configured to collect and concentrate solar radiation. This unit is designed to maximize the capture of solar energy and focus it effectively. The solar collector unit (10) may be implemented as a parabolic dish, Fresnel lens, or other suitable concentrating optics, optimized for efficient sunlight capture and concentration. Positioned at the focal point of the solar collector unit (10) is the water heater unit (20). This strategic placement ensures that the concentrated solar energy is directly transferred to the water for heating, maximizing energy utilization and heating efficiency. The water heater unit (20) is the core component of the system, where the actual water heating process takes place.

[0033] The water heater unit (20) comprises a cylindrical body (21) made from stainless steel. Specifically, SS316 grade stainless steel is used, ensuring excellent corrosion resistance and hygienic suitability for water treatment. This material choice is crucial for maintaining water quality and ensuring the longevity of the system, particularly in varied environmental conditions and with different water qualities.

[0034] Within the cylindrical body (21), the invention incorporates integrated radial fins (22). These fins are welded symmetrically within the cylindrical body (21) to enhance heat transfer. The radial arrangement of these fins serves multiple purposes. Firstly, they significantly increase the surface area for heat transfer from the solar-heated outer surface to the water inside. Secondly, they promote uniform heat distribution throughout the water volume, addressing the common issue of temperature stratification in conventional systems. The fins also help in creating natural convection currents within the water, further aiding in even heat distribution without the need for active circulation.

[0035] The system incorporates a data logger (40) and a solenoid valve (30) to achieve precise temperature control and automated operation. The data logger (40) is configured to monitor the temperature of water continuously using a temperature sensor (41). This real-time temperature monitoring is crucial for maintaining optimal performance and ensuring water is heated to the desired temperature. When the preset temperature threshold is reached, the data logger (40) sends a command to the solenoid valve (30), triggering the release of the heated water. This automated control system ensures consistent heating to the desired temperature and eliminates the need for manual monitoring and intervention. This configuration is ensure to release water before it reaches the boiling point. This controlled release mechanism is crucial for several reasons. It ensures safety by preventing steam generation and potential pressure build-up. It also maintains the quality of the heated water by avoiding phase change, which could affect mineral content and taste. Furthermore, this feature allows the system to efficiently provide hot water at optimal temperatures for various applications, including thermal disinfection.

[0036] The water heater unit (20) operates in a passive mode without active circulation or stirring. This passive operation is a major advancement over conventional systems that rely on pumps for fluid circulation. By eliminating the need for active circulation, the system reduces complexity, energy consumption, and potential points of failure. The passive mode operation relies on the natural convection currents created by the heating process and gravity to help the water to follow without any external energy.

[0037] The entire system (100) operates without external energy input, enabling off-grid passive heating. The system provides a solar panel unit (50) which converts the solar energy to electricity and provides sufficient energy to operate the entire systems equipment. This feature makes the system particularly suitable for rural and remote applications where access to electricity may be limited or unreliable. The ability to function independently of external power sources enhances its versatility and applicability in diverse settings.

[0038] In some embodiments, the system (100) is designed for a water purification unit for rural applications, addressing the critical need for both hot water and safe drinking water in underserved areas. It is capable of heating water to temperatures up to 90°C, which is sufficient for thermal disinfection of water. This temperature range is effective in eliminating many waterborne pathogens, including bacteria, viruses, and protozoa, making the water safe for consumption and use.

[0039] In some embodiments, the solar collector is a Scheffler-type parabolic solar collector. It has a paraboloid shape to focus sunlight onto the water heater with a fixed focal point. The collector tracks the sun's movement using a dual-axis mechanism, comprising a vertical tracking mechanism and a horizontal tracking mechanism. The vertical tracking is enabled via a conveyor belt mechanism driven by a motor, while the horizontal tracking uses a linear actuator controlled by a programmable cyclic timer for intermittent sun alignment.

[0040] FIG. 2 provides further details and various views of the water heating unit. This unit comprising a cylindrical shape water storage having radial fins and is made from SS316 stainless steel for corrosion resistance and hygiene. It is positioned at the focal point of the solar collector to maximize solar radiation concentration. The cylindrical design ensures uniform heat distribution and prevents localized overheating. The radial cross-fins are integrated within the heating cylinder to enhance heat transfer efficiency. These symmetrically welded fins create a radial pattern that increases the surface area for thermal conduction, ensuring even heat distribution and minimizing temperature gradients. The radial design also facilitates the precipitation of hardness-causing salts during the heating process, contributing to water purification.

[0041] The side view provides a detailed perspective of the heating cylinder and its radial cross-fins, highlighting their geometric arrangement and structural integrity. The front view showcases the circular cross-section of the heating cylinder and the radial arrangement of the fins, offering insight into the spatial distribution and heat transfer contribution of the fins. The back view completes the depiction by showing the structural support and mounting features of the heating cylinder.

[0042] Now with reference to FIG. 3, a method of heating water using the water heating system (100) is provided. The method comprises the following steps:

[0043] At step 402, the method includes collecting and concentrating solar radiation using the solar collector unit (10). The solar collector unit (10) is designed to efficiently capture and focus sunlight onto the water heater unit (20).

[0044] At step 404, the method includes heating water in the water heater unit (20) to a threshold value. The water heater unit (20) comprises a cylindrical body (21) made from stainless steel with integrated radial fins (22) to enhance heat transfer and promote even heating of the water volume.

[0045] At step 406, the method includes monitoring the water temperature using the temperature sensor (41). The temperature sensor (41) continuously tracks the water temperature as it rises within the water heater unit (20).

[0046] At step 408, the method includes sending a command from the data logger (40) to the solenoid valve (30) when the threshold value is reached. The data logger (40) is configured to monitor the temperature data from the sensor (41) and trigger the release mechanism when the desired temperature is achieved.

[0047] At step 410, the method includes opening the solenoid valve (30) to release the heated water. This controlled release prevents the water from reaching its boiling point and allows for efficient distribution of the heated water for various applications.

[0048] In some embodiments, the method further comprises thermally disinfecting the water during the heating process. The system's ability to heat water to temperatures up to 90°C provides effective pathogen inactivation, making it suitable for water purification applications.

[0049] In some embodiments, the heating process induces precipitation of hardness-causing salts from the water. As the water temperature increases, certain minerals may precipitate out of solution, potentially improving overall water quality.

[0050] In some embodiments, the method includes operating the entire water heating system (100) without external energy input in an off-grid, rural application. The passive design of the system allows for operation in remote areas lacking conventional power sources.

[0051] In some embodiments, the present invention is specifically adapted for water purification in rural areas where access to clean drinking water is limited. As the water is heated to temperatures up to 90°C in the water heater unit (20), it undergoes thermal disinfection, effectively eliminating harmful pathogens. Additionally, this heating process induces the precipitation of dissolved minerals and salts. The heated water is then released into the settling tank, where it cools naturally. During this cooling process, the precipitated minerals settle to the bottom of the tank. The upper portion of the cooled water, now purified and with reduced hardness, can be safely drawn off for further filtration if needed and then released drinking water.

[0052] Additional embodiments include thermal disinfection of water, precipitation of hardness-causing salts during heating, and operation without external energy input in off-grid, rural applications.

[0053] It should be understood that the present disclosure is not limited to the precise configurations described above. Various changes, modifications, and variations may be made in the arrangement, operation, and details of the methods and systems of the present disclosure without departing from the scope of the invention.
, C , C , Claims:1. A water heating system (100) for heating water using solar radiation, the system comprising:
a solar collector unit (10) configured to collect and concentrate solar radiation;
a water heater unit (20) positioned at a focal point of the solar collector unit (10),
wherein the water heater unit (20) comprising:
a cylindrical body (21) made from stainless steel;
integrated radial fins (22) within the cylindrical body (21) to enhance heat transfer;
wherein the water heater unit (20), is configured to release the water before the water reaches the boiling point of water.

2. The system as claimed in claim 1, comprises a data logger (40) and solenoid valve (30), wherein the data logger (40) configured to monitor the temperature of water by a temperature sensor (41) and send a command to the solenoid valve (30) for releasing the water.

3. The water heating system as claimed in claim 1, wherein the heater unit (20) has a capacity to handle a volume of 15 liters, a diameter of 44.3 cm, and a height of 10 cm.

4. The water heating system of claim 1, wherein the integrated radial fins (22) are welded symmetrically within the cylindrical body (21) and the stainless steel is SS316 grade, ensuring corrosion resistance and hygienic suitability for water treatment.

5. The water heating system of claim 1, wherein the water heater unit (20) operates in a passive mode without active circulation or stirring and the entire system (100) operates without external energy input enabling off-grid passive heating.

6. The water heating system as claimed in claim 1, wherein the system (100) is designed for a water purification unit for rural applications, and heats water to a temperature up to 90°C, and is configured for thermal disinfection of water.

7. A method of heating water using the water heating system (100) of claim 1, the method comprising:
collecting and concentrating solar radiation using the solar collector unit (10);
heating water in the water heater unit (20) to the threshold value;
monitoring the water temperature using the temperature sensor (41);
sending a command from the data logger (40) to the solenoid valve (30) when the threshold value is reached;
opening the solenoid valve (30) to release the heated water.

8. The method of claim 7, further comprising thermally disinfecting the water during the heating process.

9. The method of claim 7, wherein the heating process induces precipitation of hardness-causing salts from the water.

10. The method of claim 7, further comprising operating the entire water heating system (100) without external energy input in an off-grid, rural application.