Preparation and Evaluation of PCMs by Macro Encapsulation for Solar Energy Storage

Author(s): Sunita Routray*, Vishal Agarwal, Ranjita Swain, Rudra Narayan Mohapatro

Journal Name: Recent Innovations in Chemical Engineering
Formerly Recent Patents on Chemical Engineering

Volume 14 , Issue 4 , 2021

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Background: Phase Change Materials (PCMs) are used in a latent heat storage system for storing thermal energy. The thermal conductivity of PCMs is enhanced by macro encapsulation for large-scale use.

Objective: This technique not only provides a self-supporting structure of PCM but also separates the PCM from thermal fluids and enhances the heat transfer rate.

Methods: The current work involves the study of encapsulation of low-cost inorganic PCMs, such as sodium nitrate (NaNO3), in a temperature range of 300 - 500°C. Silicate coating is also applied to PCM capsules. A solar water heater is then designed using the macro encapsulated PCM.

Results and conclusion: The water heater consists of cylindrical copper pipes filled with phase change material. The efficiency of the solar water heater is found to be 22.5%.

Keywords: Phase change materials, thermal energy storage, macro encapsulation, thermal conductivity, solar energy, thermal fluids.

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Article Details

Year: 2021
Published on: 03 February, 2021
Page: [320 - 324]
Pages: 5
DOI: 10.2174/2405520414666210203221818
Price: $95

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PDF: 436