LHS Full Form

LHS Full Form


Introduction

Latent Heat Storage stores heat in a storage medium in the form of potential energy between the particles of the substance. The conversion between the heat and the potential energy within the substance involves a phase change- thus heat storage occurs without significant temperature changes in the storage medium.

Latent Heat Storage (LHS) Deep Study

A common approach to thermal energy storage is to use material known as phase change materials (PCMs). These materials store heat when they undergo a phase change, for example, from solid to liquid, from liquid to gas, or from solid to solid (change of any crystalline form into another without a physical phase change).
 

The phase change “solid to liquid” is the most used, but also solid to solid change is of interest. These materials can be used as an effective way of storing thermal energy (solar energy, off-peak electricity, industrial waste heat) in comparison of sensible heat storage systems, the latent heat storage has the advantages of high storage density (due to high latent heat of fusion) and the isothermal nature of the storage process. The heat of fusion or the heat of evaporation is much greater than the specific heat of capacity. The comparison between latent heat storage and sensible heat storage shows that the latent heat storage storage densities are typically 5-10 times higher.
 

In general latent heat effects associated with the phase change are significant. Latent heat, known as the enthalpy of vaporization (liquid-to-vapor phase change) or enthalpy of fusion (solid to liquid phase change), is the amount of heat added to or removed from a substance to produce a change in phase. This energy breaks down the intermolecular attractive forces, and also must provide the energy necessary to expand the substance. When latent heat is added, no temperature change occurs.