Graduation Year
2012
Document Type
Thesis
Degree
M.S.M.E.
Degree Granting Department
Mechanical Engineering
Major Professor
Yogi D. Goswami
Co-Major Professor
Muhammad Rahman
Keywords
Coating, Corrosion, Latent Heat, Steel, Thermal Cycling
Abstract
Thermal energy storage is a major contributor to bridge the gap between energy demand (consumption) and energy production (supply) by concentrating solar power. The utilization of high latent heat storage capability of phase change materials is one of the keys to an efficient way to store thermal energy. However, some of the limitations of the existing technology are the high volumetric expansion and low thermal conductivity of phase change materials (PCMs), low energy density, low operation temperatures and high cost. The present work deals with encapsulated PCM system, which operates at temperatures above 500°C and takes advantage of the heat transfer modes at such high temperatures to overcome the aforementioned limitations of PCMs. Encapsulation with sodium silicate coating on preformed PCM pellets were investigated. A low cost, high temperature metal, carbon steel has been used as a capsule for PCMs with a melting point above 500° C. Sodium silicate and high temperature paints were used for oxidation protection of steel at high temperatures. The emissivity of the coatings to enhance heat transfer was investigated.
Scholar Commons Citation
Nath, Rupa, "Encapsulation of High Temperature Phase Change Materials for Thermal Energy Storage" (2012). USF Tampa Graduate Theses and Dissertations.
https://digitalcommons.usf.edu/etd/4180
Included in
American Studies Commons, Materials Science and Engineering Commons, Oil, Gas, and Energy Commons
