Coconut oil-cellulose beaded microfibers by coaxial electrospinning: An eco-model system to study thermoregulation of confined phase change materials

Cellulose ◽  
2018 ◽  
Vol 26 (3) ◽  
pp. 1855-1868 ◽  
Author(s):  
W. M. Ranodhi N. Udangawa ◽  
Charles F. Willard ◽  
Chiara Mancinelli ◽  
Caitlyn Chapman ◽  
Robert J. Linhardt ◽  
...  
2019 ◽  
Vol 355 ◽  
pp. 532-539 ◽  
Author(s):  
Yuan Lu ◽  
Xiudi Xiao ◽  
Juan Fu ◽  
Changmeng Huan ◽  
Shuai Qi ◽  
...  

2019 ◽  
Vol 9 (8) ◽  
pp. 1627 ◽  
Author(s):  
Samer Kahwaji ◽  
Mary Anne White

Edible oils could provide more accessible alternatives to other phase change materials (PCMs) for consumers who wish to build a thermal energy storage (TES) system with sustainable materials. Edible oils have good shelf life, can be acquired easily from local stores and can be less expensive than other PCMs. In this work, we explore whether margarine, vegetable shortening, and coconut oil are feasible PCMs, by investigations of their thermal properties and thermal stability. We found that margarine and vegetable shortening are not useful for TES due to their low latent heat of fusion, ΔfusH, and poor thermal stability. In contrast, coconut oil remained thermally stable after 200 melt-freeze cycles, and has a large ΔfusH of 105 ± 11 J g−1, a low degree of supercooling and a transition temperature, Tmpt = 24.5 ± 1.5 °C, that makes it very useful for TES in buildings. We also determined coconut oil’s heat capacity and thermal conductivity as functions of temperature and used the measured properties to evaluate the feasibility of coconut oil for thermal buffering and passive heating of a residential-scale greenhouse.


2015 ◽  
Vol 766-767 ◽  
pp. 463-467
Author(s):  
B. Kanimozhi ◽  
Kumar Sanandharya ◽  
Sumit Anand ◽  
Sandeep Kumar

The main objective of our project is to conserve the available solar energy and improve its utilization with the help of phase change material; here we have absorbed solar energy to prepare food especially for cooking rice, boiling potatoes and eggs. The use of PCM in the solar cooker has improved its efficiency over conventional solar cooker and cooking food hot in off sunshine hours. It is being eco-friendly and other than that it save fuel, gas, coal which are exhaustible source of energy. In the present article some of different phase change materials are studied for solar cooking and among them Coconut Oil (commercial grade) is found to be a good latent heat storage which is experimentally tested in a simple box type solar cooker and the comparison is made with and without PCM.Key word: solar cooker, coconut oil, concentrating lens, phase change materials.


2021 ◽  
Vol 2021 ◽  
pp. 58-64
Author(s):  
E.G. Saraç ◽  
E. Öner ◽  
M.V. Kahraman

Phase change materials (PCMs) are thermal energy storing materials which are adopted in various industries including textiles. They provide temperature regulation by absorbing the heat from the ambiance or releasing the latent heat that they store. PCMs are widely integrated into textiles in microencapsulated form where the core PCM is covered by the microcapsule shell and protected during phase change. This form also provides a higher thermal conductivity. In this work, a blend of organic coconut oil and n-octadecane were used as phase change material in core, and melamine formaldehyde was used as shell material to develop microencapsulated PCM for heat storage. The microcapsules were produced by using in situ polymerization method. The developed microcapsules (MPCMs) were integrated to a recycled PES (polyester) nonwoven fabric, generated from PET (polyethylene terephthalate) fibres, and manufactured by combing and needle punching technique. The MPCMs were implemented to the fabric by coating method. The core PCM, MPCM, and the coated nonwoven fabric were assessed by Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FT-IR). SEM results indicated that spherical and uniform microcapsules were obtained with a particle size of 3-9 μm. DSC results revealed that MPCM and the MPCM coated nonwoven fabric possessed a remarkable melting enthalpy of 111 J/g and 30.9 J/g, respectively at peak melting temperatures of 28.1°C and 27.4°C.


2019 ◽  
Vol 4 (17) ◽  
pp. 5110-5115 ◽  
Author(s):  
Burcu Oktay ◽  
Emre Baştürk ◽  
Memet Vezir Kahraman ◽  
Nilhan Kayaman Apohan

Author(s):  
S.S. Kruglov (Jr.) ◽  
◽  
G.L. Patashnikov ◽  
S.S. Kruglov (Sr.) ◽  
◽  
...  

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