The energy storage capacity of latent heat thermal energy storage systems is high therefore these systems are efficient among all other thermal heat storage. This study experimentally investigates the charging and solidification of stearic acid (C₁₈H₃₆O₂) in the finned triplex pipe heat exchanger with holes on the fin surface. The melting and discharging of stearic acid are carried out at steady inlet heat transfer fluid (HTF) i.e., water temperature. This study also investigates the result of the change in HTF flow rate on solidification and melting of phase change material. Finally, the study focuses on the comparison of average effectiveness for finned triplex tube heat exchanger and finned triplex tube with cylindrical holes on fin surface with rates of 0.33 and 0.43 Kg/s. The results showed that the average effectiveness with a finned triplex tube with a perforated fin surface is 4% more than that of a finned triplex tube at 0.33 Kg/s whereas it is 5 % more at 0.43 Kg/s during the charging process. On the other side during discharging process average effectiveness is 14 % more at 0.33 Kg/s and 11 % at 0.43 Kg/s.

With the rapid growth of modern technology, maintenance contributes significantly vitalfunction in many industries. The objectives of maintenance-related decision-making process will lead to select and use various condition monitoring techniques for different industrial applications. It is evident from the published literature that, effective use of ISO standards in isolation is very well documented, but after knowing the importance of the use of integrated condition-based maintenance (ICBM) strategy, it will be more important to know how interoperability of international standards, company standards, standard guidelines, and recent research models/recommendations will help to implement ICBM strategy more effectively.These paper overview relevant international standards related to condition monitoring &diagnosis of selected machines used in power generation and highlights case of how concept of interoperability of standards defined at different levels helpedtoselect suitable maintenance strategytoimprove the availability of the system.

Phase change material in heat pipes can be used to overcome the problem of heat storage and electronic cooling in a different application. In this work, earlier relevant literature has been reviewed which focuses on the application of heat pipe. with PCM. The PCM storage tank is mounted on the heat pipe’s adiabatic section. PCM storage tank absorbed and release heat which is dependent upon input power value at the evaporator and that of the speed of the fan at the condenser. The phase change materials used are (sodium nitrate, paraffin wax, Tricosane, aqua ammonia, n-Octadecane)and the heat pipe used is (circular heat pipe, Variable conductance heat pipe, Thermosyphon heat pipe, oscillating heat pipe, Plate based heat pipe ). In the present work, the performance of the heat pipe is studied and investigated for efficiency enhancement. The temperature at the evaporator is decreased when nano-enhanced PCM is used, which helps to reduce work at the condenser section.

Existing insulating materials used in MV switchgear are providing insulations as primary objective & have low thermal conductivity for the heat produced by the current carrying conductors. As thermal management plays prime role in deciding the size of switchgear equipment, Today in MV switchgear across all products many insulating materials like epoxy, polyurethane, polypropylene, SMC, heat shrink sleeves, silicone rubber, EPDM, ceramic etc. are used to insulate from phase to phase and phase to earth. Functionally these insulators are limited by thermal capabilities due to glass transition temperature. Because of this, the development of high thermal conductive insulators are important for high current carrying switchgears from 1250A to 3150A. conductivity of the existing insulator is 0.8 -0.9 W/m. K, and after the theoretical calculation we found that the thermal conductivity of new epoxy material is 3.71 (W/m⋅K)