Selection Principles and Investigation of Substances for Synthesis of Composite Medium-Temperature Phase Change Materials for Space Heating and Domestic Hot Water

2020 ◽  
Vol 989 ◽  
pp. 165-171
Author(s):  
A.M. Morzhukhin ◽  
D.S. Testov ◽  
S.V. Morzhukhina
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Hot Water ◽  
Temperature Phase ◽  
Heat Accumulation ◽  
Medium Temperature ◽  
Domestic Hot Water ◽  
Selection Principles ◽  
Salt Hydrates ◽  
Selection Of

The types of heat accumulation and the types of heat-accumulating materials are considered. It is shown that the most promising as heat-accumulating materials for heating and hot water are the salts hydrates. Based on the conducted factor analysis, a number of criteria are excluded from further consideration, which significantly reduces the list of criteria considered for selecting phase change materials (PCM) and simplifies further work on the selection of the most promising materials. There were selected from over 160 salt hydrates as PCM for the future of composite synthesis for the heating and hot water the Na (CH3COO) •3H2O, Ba (OH)2•8H2O, Mg (NO3)2 •6H2O and Zn (NO3)2•6H2O.

Energetic Interest of the Use of Phase Change Materials in a Solar Domestic Hot Water System

2010 ◽  
Author(s):  
Stéphane Gibout ◽  
Jean-Pierre Bedecarrats ◽  
Erwin Franquet ◽  
Jean Castaing-Lasvignottes ◽  
Jean-Pierre Dumas
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Water System ◽  
Hot Water ◽  
Domestic Hot Water

scholarly journals Evaluating a prototype compact thermal energy storage tank using paraffin-based phase change material for domestic hot water production

2019 ◽  
Vol 116 ◽  
pp. 00016
Author(s):  
George Dogkas ◽  
John Konstantaras ◽  
Maria K. Koukou ◽  
Vassilis N. Stathopoulos ◽  
Luis Coelho ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Storage System ◽  
Energy Storage System ◽  
Hot Water ◽  
Domestic Hot Water ◽  
Tube Heat Exchanger

A full-scale thermal energy storage system using phase change materials (PCM) is experimentally investigated for solar and geothermal applications. The system consists of a rectangular tank filled with PCM and a staggered fin tube heat exchanger (HE). The system is designed for the production of Domestic Hot Water (DHW) based on the EU Commission Regulation No 814/2013 [1] requirements. The characteristics that are studied are the stored energy density of the system, the heat transfer rate through the HE during the charging and discharging processes, the adequacy of produced hot water amount and the storage efficiency of the tank. The results of the experiments confirmed the potential of the system to meet several prerequisites of a DHW installation and in addition to make the operation of the coupled solar collector or ground heat pump efficient.

scholarly journals Phase change materials in solar domestic hot water systems: A review

2021 ◽  
Vol 10 ◽  
pp. 100075 ◽  
Author(s):  
Eleni Douvi ◽  
Christos Pagkalos ◽  
George Dogkas ◽  
Maria K. Koukou ◽  
Vassilis N. Stathopoulos ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Water Systems ◽  
Hot Water ◽  
Domestic Hot Water

scholarly journals Experimental Comparison of Three Characterization Methods for Two Phase Change Materials Suitable for Domestic Hot Water Storage

2021 ◽  
Vol 11 (21) ◽  
pp. 10229
Author(s):  
Maxime Thonon ◽  
Laurent Zalewski ◽  
Stéphane Gibout ◽  
Erwin Franquet ◽  
Gilles Fraisse ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Mass Density ◽  
Hot Water ◽  
Experimental Comparison ◽  
Two Phase ◽  
Characterization Methods ◽  
Domestic Hot Water ◽  
Significant Difference

This study presents an experimental comparison of three characterization methods for phase change materials (PCM). Two methods were carried out with a calorimeter, the first with direct scanning (DSC) and the second with step scanning (STEP). The third method is a fluxmetric (FM) characterization performed using a fluxmeter bench. For the three methods, paraffin RT58 and polymer PEG6000, two PCM suitable for domestic hot water (DHW) storage, were characterized. For each PCM, no significant difference was observed on the latent heat and the total energy exchanged between the three characterization methods. However, DSC and STEP methods did not enable the accurate characterization of the supercooling process observed with the FM method for polymer PEG6000. For PEG6000, the shape of the enthalpy curve of melting also differed between the experiments on the calorimeter—DSC and STEP—methods, and the FM method. Concerning the PCM comparison, RT58 and PEG6000 appeared to have an equivalent energy density but, as the mass density of PEG6000 is greater, more energy is stored inside the same volume for PEG6000. However, as PEG6000 experienced supercooling, the discharging temperature was lower than for RT58 and the material is therefore less adapted to DHW storage operating with partial phase change cycles where the PCM temperature does not decrease below 52 °C.

scholarly journals Selection of the Appropriate Phase Change Material for Two Innovative Compact Energy Storage Systems in Residential Buildings

2020 ◽  
Vol 10 (6) ◽  
pp. 2116 ◽  
Author(s):  
Gabriel Zsembinszki ◽  
Angel G. Fernández ◽  
Luisa F. Cabeza
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Storage Systems ◽  
Residential Buildings ◽  
Hot Water ◽  
Energy Storage Systems ◽  
Change Material ◽  
Selection Of

The implementation of thermal energy storage systems using phase change materials to support the integration of renewable energies is a key element that allows reducing the energy consumption in buildings by increasing self-consumption and system efficiency. The selection of the most suitable phase change material is an important part of the successful implementation of the thermal energy storage system. The aim of this paper is to present the methodology used to assess the suitability of potential phase change materials to be used in two innovative energy storage systems, one of them being mainly intended to provide cooling, while the other provides heating and domestic hot water to residential buildings. The selection methodology relies on a qualitative decision matrix, which uses some common features of phase change materials to assign an overall score to each material that should allow comparing the different options. Experimental characterization of the best candidates was also performed to help in making a final decision. The results indicate some of the most suitable candidates for both systems, with RT4 being the most promising commercial phase change material for the system designed to provide cooling, while for the system designed to provide heating and domestic hot water, the most promising candidate is RT64HC, another commercial product.

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