Related Experiment Video
Updated: Jun 13, 2025
07:32
Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
Published on: April 10, 2017
9.0K
Experimental Study on the Thermal Protection Enhancement of Novel Phase Change Material Integrated Structural
Xun Wang1, Weihuan Zhao2, Jonisha Pollard3
1Department of Mechanical Engineering, College of Engineering, University of North Texas, Denton, TX 76207, USA.
Case Studies in Thermal Engineering
|September 17, 2024
Summary
Phase change material (PCM) in firefighters' gloves significantly enhances thermal protection, extending protection time by up to five times. Optimal performance was observed with a 68°C melting point PCM layer, improving safety for firefighters.
Area of Science:
- Materials Science
- Thermal Engineering
- Protective Equipment Design
Background:
- Phase change materials (PCMs) are crucial for thermal management.
- Firefighters' gloves require advanced thermal protection.
- Existing research lacks holistic experimental data on PCM-integrated firefighters' gloves.
Purpose of the Study:
- To experimentally investigate the thermal control performance of firefighters' gloves integrated with phase change materials (PCMs).
- To determine the optimal PCM properties (melting point, thickness, location) for enhanced thermal protection and hand dexterity.
Main Methods:
- Experimental testing of firefighters' gloves with embedded PCM layers under various thermal stress conditions (direct contact with hot objects, radiant/convective heat).
- Evaluation of thermal protection time and hand surface temperature rise.
- Analysis of PCM melting point, thickness, and location effects on performance.
Main Results:
- Embedding a 1-mm PCM layer extended thermal protection time by 2-5 times against hot objects and 1.5 times against radiant/convective heat.
- A PCM with a 68°C melting point demonstrated superior performance across all tested conditions.
- Optimal PCM placement varied by melting point: lower melting points near the heat source, higher melting points near the hand.
- Recommended PCM thickness is 0.5-1.0 mm for a balance between protection and dexterity.
- Integrated PCM delayed hand surface temperature rise post-exposure due to stored latent heat.
Conclusions:
- PCM integration offers a significant improvement in thermal protection for firefighters' gloves.
- Specific PCM properties and placement are critical for maximizing performance.
- PCM-enhanced gloves provide extended safety margins and improved thermal comfort for firefighters.
Keywords:
Glove thermal protection improvementParametric studiesPhase change materialStructural firefighting glovesTemperature control performanceMore Related Videos
Related Concept Videos
01:19Phase Changes
4.2K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.2K
02:31Phase Transitions
19.0K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.0K
01:29Decreased Body Temperature
602
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
602
00:59States of Matter and Phase Changes
932
The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends on the strength of the intermolecular forces in the condensed phases and the pressure exerted on the substance. The internal energy of a substance is the highest in the gaseous state, the lowest in the solid state, and intermediate in the liquid state. Phase transitions are caused by changes in physical conditions, such as temperature and...
932
01:25Increased Body Temperature
647
A body temperature above 38°C (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
647
02:39Phase Transitions: Melting and Freezing
12.3K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.3K