What is PCM cooling?
Abstract ‘Phase-Change-Material’ (PCM) is able to store thermal energy through change of its physical condition from solid to liquid without heating-up. In order to enable the effect of phase change a significant difference in maximum daytime and minimum night-time temperature is required.
How does PCM reduce temperature?
Paracetamol seems to work by blocking chemical messengers in the brain that tell us we have pain. Paracetamol also reduces fever by affecting the chemical messengers in an area of the brain that regulates body temperature.
What is phase change material air conditioning?
Phase change materials are able to absorb, store and release large amount of heat. It is promising storage medium for a large number of applications such as waste-heat recovery, cooling and heating of buildings or heat pump-systems [2]. It is also considered for air conditioning systems.
What is PCM in heat transfer?
Phase Change Materials (PCMs) are a passive, two-phase, thermal storage technology that utilize the latent heat of fusion to absorb thermal energy.
What is PCM fabric?
Any material that experiences the process of phase change is named as Phase Change Materials (PCM). Such materials collect, discharge or absorb heat as they oscillate between solid and liquid form. They discharge heat as they transform to a solid state and absorb as they go back to a liquid state.
How does PCM material work?
A PCM works by absorbing heat as it changes state from solid to liquid (heat of fusion – melting), and giving off the stored heat as the material changes back from liquid to solid. The temperature to which a material in contact with PCM is exposed is moderated by the absorption and release of heat from the PCM.
What is the best phase change material?
Paraffin waxes are the most common PCM for electronics thermal management because they have a high heat of fusion per unit weight, have a large melting point selection, provide dependable cycling, are non-corrosive and are chemically inert.
What is phase change material made of?
There are two principal classes of phase change material: organic (carbon-containing) materials derived either from petroleum, from plants or from animals; and salt hydrates, which generally either use natural salts from the sea or from mineral deposits or are by-products of other processes.
How do you choose PCM material?
There are several factors that need to be considered when selecting a phase change material. An ideal PCM will have high heat of fusion, high thermal conductivity, high specific heat and density, long term reliability during repeated cycling, and dependable freezing behavior.