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Heat Pipe Basics and Demonstration Video

Check out our new version of this video here:    • Heat Pipe Basics and Demonstration on How ...   This video from ACT (www.1-act.com) provides a brief, high-level overview of the thermodynamic properties occurring during heat pipe operation. It also provides a real-life visual demonstration of the performance enhancements of heat pipes over copper. A heat pipe consists of a working fluid, a wick structure, and a vacuum-tight containment unit (envelope). The heat input vaporizes the working fluid in liquid form at the wick surface in the evaporator section. Vapor and its associated latent heat flow toward the colder condenser section, where it condenses, giving up the latent heat. Capillary action then moves the condensed liquid back to the evaporator through the wick structure. Essentially, this operates in the same way as how a sponge soaks up water. Phase-change processes and the two-phase flow circulation in the heat pipe will continue as long as there is a large enough temperature difference between the evaporator and condenser sections. The fluid stops moving if the overall temperature is uniform, but starts back up again as soon as a temperature difference exists. No power source (other than heat) is needed. Heat pipes have a high thermal conductivity (10,000 to 100,000 W/m K). In some cases, when the heated section is below the cooled section, gravity is used to return the liquid to the evaporator. However, a wick is required when the evaporator is above the condenser on earth. A wick is also used for liquid return if there is no gravity, such as in NASA’s microgravity applications. https://www.1-act.com/innovations/hea... For more information about how heat pipes work and the types of working fluids available for custom heat pipe design, visit us here: www.1-act.com. © 2021 ADVANCED COOLING TECHNOLOGIES, INC. ALL RIGHTS RESERVED