Introduction 

Engineering films utilized for tractable designs give a generally low warm protection limit contrasted with the exemplary structure materials, for example, shingles, wood supports, fiber mats, or blocks. Hence, a lot of hotness given by sun oriented radiation infiltrate every day through the films into the walled in area. This leads, for example, to an overheating of the construction's inside on hot days. The warm exhibition of layer materials can be extraordinarily improved and customized to the particular protection needs of tractable designs by the utilization of stage change material (PCM) (Pause, 2006; Zhang, Herzog, and Mauser 2006).

PCMs are substances that assimilate or delivery a lot of purported inert hotness when they go through an adjustment of their actual express, that is, dissolve from a strong into a fluid. In a warming interaction, the stage change from a strong into a fluid happens when the material arrives at a material-explicit stage change temperature. During the liquefying system and the inert hotness ingestion related with it, the temperature of the PCM stays steady. The idle hotness is put away in the PCM and is delivered when, in a cooling cycle, an opposite stage change from the fluid state into the strong state happens, that is, the material solidifies. During this crystallization cycle and the idle hotness discharge related with it, the temperature of the PCM likewise remains consistent. The way that a lot of inert hotness is assimilated or delivered with no temperature change makes PCMs exceptionally alluring as a method for heat stockpiling.

Different types and shapes of tensile membrane structures

1. The term tensile structures portray the classification of structures where the heap bearing limit is accomplished through strain pressure in most of the parts, like links, specialized textures or foils. •It can likewise be characterized as a design where the outside shell is a texture material spread over a system. The texture is kept up with in strain every which way to give steadiness. •The just exemption is addressed by inflexible limits and underlying individuals, which are by and large exposed to pressure and bowing. •Tension structures are usually partitioned in limit tensioned films, pneumatic structures and pre-focused """