Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Phase Changes01:19

Phase Changes

5.6K
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...
5.6K
States of Matter and Phase Changes00:59

States of Matter and Phase Changes

5.2K
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...
5.2K
Phase Transitions02:31

Phase Transitions

23.7K
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...
23.7K
Phase Transitions01:21

Phase Transitions

44
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
44
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

15.6K
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...
15.6K
Heating and Cooling Curves02:44

Heating and Cooling Curves

28.6K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
28.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Performance and stability of membrane-photoelectrode assemblies with BiVO<sub>4</sub> photoanodes for water splitting.

Sustainable energy & fuels·2026
Same author

Performance and stability of LaTiO<sub>2</sub>N based photoanodes at varying electrolyte temperatures and irradiances.

EES solar·2026
Same author

Degradation of oxynitride based photoanodes.

Journal of materials chemistry. A·2025
Same author

Combination therapy strategies targeting glypican-3 in hepatocellular carcinoma: A comprehensive review.

Cytokine & growth factor reviews·2025
Same author

Mitigation of gas-induced damage in bipolar membranes for CO<sub>2</sub> electrolysis.

Journal of materials chemistry. A·2025
Same author

Needle stick injuries among emergency medical services personnel: a systematic review and meta-analysis.

BMC nursing·2025

Related Experiment Video

Updated: Mar 26, 2026

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
11:11

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

11.7K

Phase Change Material Systems for High Temperature Heat Storage.

David Y S Perraudin1, Selmar R Binder1, Ehsan Rezaei2

  • 1École Polytechnique Fédérale de Lausanne (EPFL) Institute of Mechanical Engineering, LRESE CH-1015 Lausanne, Switzerland.

Chimia
|February 5, 2016
PubMed
Summary

Developing stable, cost-effective high-temperature heat storage materials is key for industrial processes and energy storage. This study combines experiments and simulations to predict the long-term performance of phase change material systems.

More Related Videos

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
10:36

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Published on: November 3, 2023

2.3K
Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
09:09

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

7.7K

Related Experiment Videos

Last Updated: Mar 26, 2026

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
11:11

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

11.7K
Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
10:36

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Published on: November 3, 2023

2.3K
Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
09:09

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

7.7K

Area of Science:

  • Materials Science
  • Thermal Engineering
  • Energy Storage

Background:

  • High-temperature heat storage is crucial for industrial processes and advanced energy storage systems.
  • Phase change materials (PCMs) offer efficient heat storage at near-constant temperatures.
  • Material selection and encapsulation are critical for PCM system performance, stability, and longevity.

Purpose of the Study:

  • To develop and validate coupled experimental-numerical techniques for predicting the long-term performance of high-temperature heat storage systems utilizing phase change materials.
  • To investigate material properties and interactions for optimal PCM system design.
  • To enhance the performance and operational lifetime of thermal energy storage solutions.

Main Methods:

  • Experimental determination of phase change material properties (melting temperature, heat of fusion) and material-encapsulation interactions (stability, interface reactions).
  • Computational modeling of coupled heat transfer, fluid flow, and phase change processes.
  • Integration of experimental data and numerical simulations for predictive analysis.

Main Results:

  • Established a methodology for predicting the long-term performance of PCM-based heat storage systems.
  • Identified critical material properties and interactions influencing system stability and efficiency.
  • Demonstrated the complementary nature of experimental and numerical approaches in material system investigation.

Conclusions:

  • Coupled experimental-numerical techniques are effective for predicting the long-term performance of high-temperature heat storage systems.
  • Careful selection of phase change materials and encapsulation is vital for achieving stable, cost-effective, and long-lasting thermal energy storage.
  • This integrated approach facilitates the design of enhanced heat storage material systems for industrial applications.