Optimization of energy consumption and temperature fluctuations for a household freezer using non‐toxic and non‐flammable eutectic phase change materials with a cascade arrangement

2020 ◽  
Author(s):  
Anahita Pirvaram ◽  
Seyed Mojtaba Sadrameli ◽  
Leila Abdolmaleki
Keyword(s):  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Materials ◽  
Temperature Fluctuations ◽  
Eutectic Phase ◽  
Cascade Arrangement

scholarly journals Effect of phase change material using in building thermal comfort applications through several climate conditions.

2020 ◽  
Vol 170 ◽  
pp. 01007
Author(s):  
Marwa El Yassi ◽  
Ikram El Abbassi ◽  
Alexandre Pierre ◽  
Yannick Melinge
Keyword(s):  
Thermal Comfort ◽  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Chemical Change ◽  
Thermal Inertia ◽  
Temperature Fluctuations ◽  
High Energy ◽  
Climate Conditions ◽  
Change Material

Nowadays, buildings sector contributes to climate change by consuming a considerable amount of energy to afford thermal comfort for occupants. Passive cooling techniques are a promising solution to increase the thermal inertia of building envelopes, and reduce temperature fluctuations. The phase change materials, known as PCM, can be efficiently employed to this purpose, because of their high energy storage density. Among the various existing solutions, the present study is dedicated to solid-liquid phase change materials. Temperature evolution (according to their defined temperature range) induces the chemical change of the material and its state. For building applications, the chemical transition can be accomplished from liquid to solid (solidification) and from solid to liquid (melting). In fact, this paper presents a comparative thermal analysis of several test rooms with and without phase change materials embedded in a composite wallboard in different climates. The used PCM consist in a flexible sheet of 5 mm thickness (Energain, manufactured by the company DuPont de Nemours). The main properties of such a commercial solution have been delivered by the manufacturer and from analyses. The room model was validated using laboratory instrumentations and measurements of a test room in four cities: Lyon; Reading and Casablanca. Results indicate that this phase change material board can absorb heat gains and also reduce the indoor air temperature fluctuations during daytime. The aim of the study is to show the benefits of this layer with phase change material and compare it in different climatic zones.

scholarly journals Influence of Thermal Insulation’s and Phase Change Material’s Insertion within a Partition Wall on the Energy Consumption of a Conditioned Room under Adjacent Local Periodical Temperature Effect

2020 ◽  
Vol 307 ◽  
pp. 01024
Author(s):  
Nisrine Hanchi ◽  
Hamid Hamza ◽  
Rabiaa Idmoussa ◽  
Jawad Lahjomri ◽  
Abdelaziz Oubarra
Keyword(s):  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Insulation ◽  
Phase Change Materials ◽  
Thermal Conditions ◽  
Thermal Activity ◽  
Partition Wall ◽  
Reduction Of Energy Consumption ◽  
Change Material

The aim of this work is to study the combined insertion effect of Phase Change Materials (PCM) and thermal insulation within a partition wall separating a conditioned room from an adjacent local which is under a periodic thermal activity. This is done by a comparative study with a reference wall under the same thermal conditions. The comparison criterion is the energy density transmitted to the local conditioned in established regime. The results show that the inclusion of thermal insulation and phase change material provides a significant reduction of energy consumption of the conditioned local; thereby a judicious choice of phase change material with thermal level and range melting temperature reduces further this reduction.

scholarly journals Evaluation of Energy Performance and Thermal Comfort Considering the Heat Storage Capacity and Thermal Conductivity of Biocomposite Phase Change Materials

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2191
Author(s):  
Su-Gwang Jeong ◽  
Taemin Lee ◽  
Jeonghun Lee
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Phase Change ◽  
Chemical Stability ◽  
Phase Change Materials ◽  
Storage Capacity ◽  
Heat Storage ◽  
Building Energy ◽  
Vacuum Impregnation

The application of phase change materials (PCMs) has been verified as an effective strategy for improving energy efficiency and reducing greenhouse gas emissions. Biocomposite PCMs (Bc-PCM) exhibit large latent heat, chemical stability, and a wide temperature range. In this study, thermal conductivity improved Bc-PCM (TBc-PCM) was made via vacuum impregnation with graphene nanoplatelets (GNPs). Chemical stability analysis and thermal performance analyses of the Bc-PCM and TBc-PCM were carried out as well as building energy simulations and thermal comfort analyses. Our results show Bc-PCM showed a higher heat storage capacity and enthalpy value compared to TBc-PCM. TBc-PCM exhibited a 378% increase in thermal conductivity compared to Bc-PCM. Building energy simulation results revealed that annual heating and cooling energy consumption decreased as the thickness of the PCM layer increased. In addition, the Bc-PCM with a larger PCM capacity was more effective in reducing energy consumption during the heating period. On the other hand, the cooling energy reduction effect was greater when TBc-PCM with high thermal conductivity was applied because of the high heat transfer during the cooling period. Thermal comfort evaluation revealed it was more comfortable when PCM was applied.

Optimum Distribution of Two Different Phase Change Materials between Various Components of Roof Air-Conditioned Room, Suitable to Reduce Annual Energy Consumption

2013 ◽  
Vol 05 (10) ◽  
pp. 628-638 ◽  
Author(s):  
Bouchra Abouelkhayrat ◽  
Hamid Hamza ◽  
Jawad Lahjomri ◽  
Abdelaziz Oubarra
Keyword(s):  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Materials ◽  
Optimum Distribution

Effect of Phase Change Material On Dynamic Thermal Management Performance for Power Electronics Packages

2021 ◽  
Author(s):  
Justin Hollis ◽  
Darin J Sharar ◽  
Todd Bandhauer
Keyword(s):  
Phase Change ◽  
Power Electronics ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Temperature Fluctuations ◽  
Junction Temperature ◽  
Latent Heat Storage ◽  
Dynamic Thermal Management ◽  
Electronics Packages ◽  
Change Material

Abstract High temperature silicon carbide (SiC) die are the most critical and expensive component in electric vehicle (EV) power electronic packages and require both active and passive methods to dissipate heat during transient operation. The use of phase change materials (PCMs) to control the peak junction temperature of the SiC die and to buffer the temperature fluctuations in the package during simulated operation is modeled here. The latent heat storage potential of multiple PCM and PCM composites are explored in both single-sided and dual-sided package configurations. The results of this study show that the addition of phase change material (PCM) into two different styles of power electronics (PE) packages is an effective method for controlling the transient junction temperatures experienced during two different drive cycles. The addition of PCM in a single-sided package also serves to decrease temperature fluctuations experienced and may be used to reduce the necessary number of SiC die required for EVs, lowering the overall material cost and volume of the package by over 50%. PCM in a single-sided package may be nearly as effective as the double-sided cooling approach of a dual-sided package in the reduction of both peak junction temperature of SiC as well as controlling temperature variations between package layers.

scholarly journals Non-eutectic Phase Change Materials for Cold Thermal Energy Storage

2017 ◽  
Vol 143 ◽  
pp. 656-661 ◽  
Author(s):  
Jia Yin Sze ◽  
Chenzhong Mu ◽  
Alessandro Romagnoli ◽  
Yongliang Li
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Eutectic Phase

Investigation Progress of Phase Change Building Materials

2014 ◽  
Vol 672-674 ◽  
pp. 1828-1832
Author(s):  
Hai Yang Ni ◽  
Xiao Qin Zhu ◽  
Jin Hu ◽  
Yu Bie ◽  
Liang Chen ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Phase Change ◽  
Energy Saving ◽  
Building Materials ◽  
Phase Change Materials ◽  
Structure And Function ◽  
Heating Energy Consumption ◽  
And Function ◽  
Important Significance

Phase change building materials are a category of building materials with the integration of structure and function, which can be achieved by phase change materials composite with the traditional building materials. They have such characteristics as the improvement of energy saving efficiency in buildings, the decrease of heating energy consumption and the adjustment of thermal comfort in the room environment etc. Therefore, phase change building materials are one of the most efficient means of energy utilizations, which has important significance for promoting their investigation and applications of energy saving in buildings.

scholarly journals A Review of a Stand-Alone Hydrogen System Application for Private Houses in Greece and the Use of Phase Change Materials in Their Building Construction

2017 ◽  
Author(s):  
Leonidas C. Raptis ◽  
Giouli K. Michalakakou ◽  
Evangelos I. Gkanas ◽  
Sofoklis S. Makridis
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Materials ◽  
Action Plan ◽  
Energy System ◽  
Standard Of Living ◽  
Hydrogen Energy ◽  
Reduce Energy Consumption ◽  
First Time

Energy is a fundamental ingredient in economic development and energy consumption is an index of prosperity and the standard of living. The consumption of energy has increased significantly in the last number of decades, as the standard of living has improved. Renewable energy is a sustainable and clean source of energy derived from nature. Renewable energy technology is one of the solutions, which produces energy by transforming natural resources into useful energy forms. When you do something for the first time in the world, you never attain a perfect product or solution from the start. In Central Greece Lamia city, we are the first to design and implement an off-grid energy system using hydrogen energy storage technology and phase change materials for a house residence. The action plan for energy efficiency, a series of directives and incentive mechanisms, mandatory energy certification of buildings, indicate the urgent need to reduce energy consumption in buildings, which results in a more comfortable living, long service life of buildings, which in turn preserves the environment.

Sign in / Sign up

Export Citation Format

Share Document