Article
Energy & Fuels
Gokhan Hekimoglu, Ahmet Sari, Turgay Kar, Sedat Keles, Kamil Kaygusuz, V. V. Tyagi, R. K. Sharma, Amir Al-Ahmed, Fahad A. Al-Sulaiman, Tawfik A. Saleh
Summary: Two types of bio-carbons were developed from walnut shell, serving as shape stabilizer and thermal conductivity enhancer for phase change materials in thermal controlling applications. The bio-carbons showed impressive performance in preventing leakage of phase change materials and increasing thermal conductivity.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Green & Sustainable Science & Technology
B. Lamrani, K. Johannes, F. Kuznik
Summary: This paper reviews the studies on phase change materials (PCMs) integrated in building walls over the past decade (2011-2020), highlighting their potential for reducing indoor air temperature fluctuations and energy consumption. However, further research is needed to consider factors such as occupant behavior, economic viability, and environmental impact.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Energy & Fuels
M. A. BEN TAHER, H. El-Otmany, T. El Rhafiki, T. Kousksou, Y. Zeraouli
Summary: This study developed a physical model to describe the thermal performance of a cylindrical tank filled with spherical water capsules during storage, using an inverse method and a genetic algorithm to evaluate the heat flux exchanged between the heat transfer fluid and the capsules. The numerical results showed good agreement with experimental data, and the influence of HTF flowrate on the shape of the released heat flux was analyzed and discussed.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Green & Sustainable Science & Technology
Salwa Bouadila, Sara Baddadi, Tauseef-ur Rehman, Rabeb Ayed
Summary: This study explores the improvement of efficiency in evacuated tube solar collectors through the addition of reflectors and thermal storage units. The performance of different designs in various regions of Tunisia is evaluated, and an energy balance model is established. Future research directions are also recommended.
Article
Environmental Sciences
Rasool Kalbasi, Bijan Samali, Masoud Afrand
Summary: Adding phase change materials (PCMs) into building envelopes is an effective way to reduce energy consumption and CO2 emissions. However, the presence of phase change in PCMs may not always lead to better energy savings. Installing PCMs near the uppermost layer can enhance energy-saving performance.
Review
Energy & Fuels
Devendra Raut, Vilas R. Kalamkar
Summary: Refrigeration is an important part of human comfort, but it consumes nearly 20% of the commercial industry's total energy consumption. The use of fossil fuels for refrigeration systems contributes to global warming, while refrigerants also contribute to global warming and ozone layer depletion. The vapor absorption refrigeration system with water-lithium bromide has the potential to eliminate harmful residuals and carbon emissions. Solar energy, although intermittent, can be used with latent heat storage technology to ensure continuous operation. This review provides insights into suitable phase change materials, storage tank designs, and performance enhancement techniques for integrating latent heat storage with vapor absorption refrigeration systems.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Green & Sustainable Science & Technology
M. Eslami, F. Khosravi, H. R. Fallah Kohan
Summary: This paper provides a comprehensive review of various fin designs proposed for latent heat thermal energy storage systems, discussing the effects of different geometrical parameters. The study shows that an optimum number of fins, spacing, and length can be found in each case, while some parameters such as fin thickness are less important.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Review
Energy & Fuels
Debasree Ghosh, Joyjeet Ghose, Pulak Datta, Pallavi Kumari, Suraj Paul
Summary: The use of phase change materials (PCMs) is crucial for energy storage and meeting basic needs. Improving the thermal properties of PCMs through additives and encapsulation can enhance their storage capacity. Encapsulated PCMs and PCM composites have shown superior performance in latent heat thermal energy storage.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Hiroaki Koide, Ade Kurniawan, Tatsuya Takahashi, Takahiro Kawaguchi, Hiroki Sakai, Yusuke Sato, Justin NW. Chiu, Takahiro Nomura
Summary: This study presents a novel high temperature latent heat storage system utilizing Al-Si-based microencapsulated phase change material in a packed bed heat exchanger, demonstrating high heat storage and release efficiency. With increased airflow rates, the phase change time of the composite decreased, leading to higher heat exchange efficiency.
Article
Crystallography
Kaixin Dong, Nan Sheng, Deqiu Zou, Cheng Wang, Xuemei Yi, Takahiro Nomura
Summary: The study developed a paraffin-wax-based phase change composite (PCC) using a new type of carbon fiber network material as the supporting matrix to improve the heat transfer properties. The PCC displayed significantly enhanced thermal conductivity, stability, and durability, offering a potential strategy for the development of anisotropic high-thermal-conductivity PCCs for latent heat storage systems.
Article
Energy & Fuels
Devendra Raut, Suraj Londhe, V. R. Kalamkar
Summary: This study investigated the effect of connection and flow parameters during charging and discharging processes, finding that the series arrangement is better than the parallel arrangement under all flow conditions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
V Ljungdahl, K. Taha, J. Dallaire, E. Kieseritzky, F. Pawelz, M. Jradi, C. Veje
Summary: This study investigates the theoretical and experimental aspects of a Phase Change Material (PCM)-based ventilation system module, developing a numerical model to predict the system's dynamic performance. The optimal PCM melting temperature is found to significantly increase cooling capacity compared to the reference temperature. The study highlights the importance of PCM mass and melting temperature in optimizing the efficiency and performance of the PCM-driven ventilation system.
Review
Energy & Fuels
Khaireldin Faraj, Mahmoud Khaled, Jalal Faraj, Farouk Hachem, Cathy Castelain
Summary: Research on thermal energy storage, particularly phase change materials like PCMs, is crucial for improving energy efficiency and maintaining thermal comfort in buildings. Current studies focus on the effectiveness of PCM in building heating applications and the significance of PCM system hybridization, while further experimental investigations and optimization of hybrid systems are still needed.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Construction & Building Technology
Rok Kozelj, Urska Mlakar, Eva Zavrl, Uros Stritih, Rok Stropnik
Summary: In the building sector, a significant amount of energy is used for heating and cooling, with residential buildings accounting for a large portion. Utilizing efficient technologies and heat storage materials, such as phase change materials, can improve energy efficiency and enable a higher utilization of renewable energy sources like solar energy. This can help reduce energy consumption and address the challenge of energy demand temporal divergence.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Devendra Raut, Saurabh Lanjewar, Vilas R. Kalamkar
Summary: This study investigates the effect of geometric and operating parameters on the charging of phase change material (PCM) in a vertical helical coiled latent heat storage (LHS) system. The results show that increasing the coil spacing and HTF inlet temperature can improve the charging process, while varying the HTF flow rate has no significant impact on the charging rate of the PCM.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Review
Chemistry, Physical
Gabriel Rubio-Perez, Natalia Munoz-Rujas, Fernando Aguilar, Rebecca Ravotti, Lukas Muller, Eduardo Montero
Summary: Interest in phase change materials is rising as a promising complement for renewable energies, with mixtures expanding the range of suitable PCM available. Precise knowledge of mixtures' phase behavior is required, and further studies are needed to enhance the currently available information in this open scientific field.
Article
Thermodynamics
S. Landini, W. Delgado-Diaz, R. Ravotti, R. Waser, A. Stamatiou, J. Worlitschek, T. S. O'Donovan
Summary: This study investigates the impact of mass and geometry as design parameters of a Lithium-Ion cell Thermal Management System filled with Phase Change Material and based on a Direct-Metal-Laser-Sintered structure. By increasing thermal energy storage capacity and enhancing equivalent thermal conductivity, the performance of Li-Ion pouch cells is significantly improved. Additionally, utilizing complex heat exchanger geometries produced using DMLS technique and filled with PCM shows a promising enhancement in overall thermal performance and temperature uniformity.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Ludger Fischer, Ernesto Mura, Poppy O'Neill, Silvan von Arx, Joerg Worlitschek, Geng Qiao, Qi Li, Yulong Ding
Summary: Phase change dispersions are useful for isothermal cooling applications, providing greater storage capacities and heat transfer efficiency. Understanding the convective heat transfer coefficients of phase change dispersions is crucial for optimizing operating conditions.
Article
Thermodynamics
Matthias Berger, Benjamin Schroeteler, Helene Sperle, Patrizia Puentener, Tom Felder
Summary: This study assesses the potential application of thermal energy storage technologies on a residential scale through a performance analysis of photovoltaic and solar thermal generation combined with energy storage systems. The results demonstrate that these technologies can significantly increase energy self-sufficiency and are competitive without subsidies, providing guidance for the future development and design of thermal energy storage.
Article
Materials Science, Characterization & Testing
Dario Guarda, Fabian Wahli, Damian Gwerder, Jorge Martinez-Garcia, Anastasia Stamatiou, Jorg Worlitschek, Simone Mancin, Philipp Schuetz
Summary: LTESs based on PCMs are key for achieving 2050 EU energy goals. The enthalpy-porosity model using CFD has been successfully applied in several articles, but measuring the liquid fraction evolution is challenging. X-ray CT is a valuable tool for evaluating liquid fraction distribution and validating numerical models.
NONDESTRUCTIVE TESTING AND EVALUATION
(2022)
Article
Polymer Science
David Schiffmann, Willy Villasmil, Sebastian Ammann, Hans Simmler, Jorg Worlitschek, Ludger Fischer
Summary: This study investigated the creep effects of XPS insulation material under high temperatures and pressure, and concluded that the creep strain in XPS remains below 6% after 50 years. Additionally, a material model was developed to predict creep strain under different temperatures and stress.
Article
Energy & Fuels
Jorge Martinez-Garcia, Damian Gwerder, Fabian Wahli, Dario Guarda, Benjamin Fenk, Anastasia Stamatiou, Jorg Worlitschek, Philipp Schuetz
Summary: Solid-liquid phase transitions in phase change materials (PCM) have complex dynamics, which affect the performance of latent heat thermal energy storage systems (LHTES). This study demonstrates the use of in-situ dynamic X-ray computed tomography (XCT) to track the phase transition dynamics in PCMs. The method relies on the density difference between solid and liquid PCM phases, allowing for the identification and spatial evolution tracking of these phases over time. Analysis of the data reveals the melting rate and time for ice/water PCM, as well as the solidification rate and volumetric shrinkage for calcium chloride hexahydrate PCM. Additionally, an image-based approach is presented for quantifying the time-dependent liquid volume fraction curves, which can be used in PCM models for performance prediction or validation.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Green & Sustainable Science & Technology
Galina Simonsen, Rebecca Ravotti, Poppy O'Neill, Anastasia Stamatiou
Summary: Harnessing the potential of phase change materials is crucial in revolutionizing thermal energy storage to address the energy generation and consumption disparity. Phase change materials, known for their ability to absorb and release substantial heat during phase transformations, have been invaluable in compact thermal energy storage technologies and applications. The shift towards biobased phase change materials in pursuit of sustainable energy models is explored in this review, identifying trends, opportunities, and challenges, and proposing novel methods for enhancing their integration into thermal energy storage applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Proceedings Paper
Thermodynamics
Adrian Mueller, Stefan Beeler, Rebecca Ravotti, Lukas Mueller, Anastasia Stamatiou, Simon Maranda, Janine Leiggener, Jorg Worlitschek
Summary: The study reports preliminary experiments on tampering with the melting points of specific, salt-based PCMs. Finding a systematic pathway to influence the melting point of salt hydrates using mixtures or additives could revolutionize the discovery of new and suitable PCMs for specific applications.
13TH IIR CONFERENCE ON PHASE CHANGE MATERIALS AND SLURRIES FOR REFRIGERATION AND AIR CONDITIONING (PCM2021)
(2021)
Proceedings Paper
Thermodynamics
Rebecca Ravotti, Colin R. Pulham, Jorg Worlitschek, Anastasia Stamatiou
Summary: Choosing suitable phase change materials is crucial for the development of efficient latent heat storage systems. Bio-based fatty esters and triglycerides have interesting melting points and high enthalpies of fusion, but their tendency to generate different polymorphs under different thermal conditions has hindered their development. Understanding the factors influencing polymorphism and ways to trigger only the desired crystalline phase is critical for promoting the usage of bio-based polymorphic esters.
13TH IIR CONFERENCE ON PHASE CHANGE MATERIALS AND SLURRIES FOR REFRIGERATION AND AIR CONDITIONING (PCM2021)
(2021)