The invention addresses the need for efficient cooling in applications with space constraints. This innovative heat pipe design utilises helically coiled tubes to maximise the number of turns per unit length, thereby enhancing heat transfer and dissipation. The design is particularly suitable for laptop cooling, solar adsorption modules, cooling of batteries and waste heat recovery systems.
Figure (1) SPIRAL CONFIGURED PHP: 2 mm OD, Coiled over 3/8’’ OD Rod and Flattened to 10 mm Double Row 1mm ID, 32 Turns, 1287 mm Total Length; (2) EXPERIMENTAL SETUP: 2 mm OD, Coiled over 3/8’’ OD Rod and Flattened to 10 mm Double Row,1mm ID, Coiled over 3/8” Diameter, 32 Turns, 1287 mm Total Length; (3) FABRICATION 5 mm OD, 0.6 mm T, 475 mm L Photographs of after inserting PHP in the Module (Below); (4) FABRICATION 5 mm OD, 0.6 mm T, 475 mm L Photographs of after inserting PHP in the Module (Front)
Traditional U-turn pulsating heat pipes are difficult to accommodate in limited spaces due to the required number of turns. These conventional designs have high pressure drops and low heat transfer rates, making them unsuitable for applications like laptop cooling, where space is a major constraint; air-to-air heat exchangers, where cost is a concern; and exhaust heat recovery, where reliability and serviceability are important.
- Helical Coiled Design: Maximises the number of turns per unit length, reducing the pressure drop, which enhances the heat dissipation and efficiency.
- Elimination of Adiabatic Section: Reduces pressure drop and enhances heat transfer rate.
- Single Material Construction: Reduces contact resistance and improves heat transfer efficiency.
- Compact and Space-efficient: Suitable for applications with limited space, such as laptops and notebooks.
- PHP-assisted solar adsorption modules for uniform and faster heating with lower thermal mass, and in waste heat recovery systems, offering a compact and passive solution for efficient heat transport.
Novel helically coiled pulsating heat pipe (PHP): It innovates by creating a closed-loop system, often flattened and integrated into a metallic support, which allows for a high number of turns in a compact space, effectively eliminating the adiabatic section.a 32-turn prototype dissipated up to 59.5 W while notably reducing the weight-to-heat dissipation ratio from 3.5 to 1.3 g/W.
The helically coiled pulsating heat pipe has been successfully developed and tested, with prototypes proving effective in various applications. The technology demonstration was partially funded by Intel India Pvt Ltd. IT can be used for battery cooling in EVs, Air to Air Heat Recovery Units in challenging applications which require simple, reliable and serviceable heat exchangers.
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The technology offers potential to save energy by improving cooling efficiency in electronic devices, batteries and air conditioning systems. It contributes to sustainable practices by enhancing waste heat recovery and reducing energy consumption in cooling applications. Additionally, it supports the miniaturization trend in electronics by providing efficient cooling solutions in limited spaces.
Cooling of electronic components and batteries, HVAC systems, and industrial processes.
201621019958
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