Application of Phase Change Material and Artificial Neural Networks for Smoothing of Heat Flux Fluctuations

Tietze, T.; Szulc, Piotr; Smykowski, Daniel; Sitka, A.; Redzicki, R.

doi:10.3390/en14123531

Cited by 9 publications

(3 citation statements)

References 69 publications

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“…Thus, a full investigation of a new nanomaterial should include the complete characterization of its physical properties in correlation with its structural characteristics. This should also include an analysis of its behavior and performance within a given designed geometry during repeated cycles through corroborating experimental and numerical data, in order to optimize the operation of the TES system that uses it, as well as through neural networks and applied vector machines [210][211][212], as shown in Figure 9. Other PCM innovation demands should focus on enhancing the structural stability, improving the stability of thermal cycle characteristics, and reducing corrosion.…”

Section: Discussionmentioning

confidence: 99%

TES Nanoemulsions: A Review of Thermophysical Properties and Their Impact on System Design

2021

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Thermal energy storage materials (TES) are considered promising for a large number of applications, including solar energy storage, waste heat recovery, and enhanced building thermal performance. Among these, nanoemulsions have received a huge amount of attention. Despite the many reviews published on nanoemulsions, an insufficient number concentrate on the particularities and requirements of the energy field. Therefore, we aim to provide a review of the measurement, theoretical computation and impact of the physical properties of nanoemulsions, with an integrated perspective on the design of thermal energy storage equipment. Properties such as density, which is integral to the calculation of the volume required for storage; viscosity, which is a decisive factor in pressure loss and for transport equipment power requirements; and thermal conductivity, which determines the heating/cooling rate of the system or the specific heat directly influencing the storage capacity, are thoroughly discussed. A comparative, critical approach to all these interconnected properties in pertinent characteristic groups, in close association with the practical use of TES systems, is included. This work aims to highlight unresolved issues from previous investigations as well as to provide a summary of the numerical simulation and/or application of advanced algorithms for the modeling, optimization, and streamlining of TES systems.

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Section: Discussionmentioning

confidence: 99%

TES Nanoemulsions: A Review of Thermophysical Properties and Their Impact on System Design

2021

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“…Due to their properties, molten salts have become very popular in heat storage systems in recent years. The advantages of molten salts include a wide range of phase transition temperatures; good thermal conductivity; high density of stored heat; no undesired exothermic chemical reaction; good thermal stability at high temperatures; non-toxicity; and low price [13]. Geometric, operational and design parameters should be taken into account in assessing the energy performance of TES latent heat.…”

Section: Latent Storage Materialsmentioning

confidence: 99%

Influence of Porous Materials on Growing the Time of Hot Water Supply for the Solar Collector

sada¹,

Kadhim²,

Habeeb³

2022

ejuow

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الملخص تخزين الطاقة هو احتجاز الطاقة في وقت واحد للاستفادة منها في وقت آخر. الهدف من هذا العمل هو تحسين وقت التخزين في خزان تخزين الماء الساخن لأطول فترة ممكنة عن طريق ملء الخزان بوسائط مسامية مناسبة وأفضل مستوى تعبئة لمادة الطبقة المعبأة. تتناول هذه الورقة طرق تخزين الطاقة الحرارية وتطبيقاتها في مجال أنظمة تسخين المياه بالطاقة الشمسية ونظام تسخين الهواء الشمسي والمواد المستخدمة للحفاظ على تلك الطاقة الحرارية بشكل احترافي. أجريت التجارب للاستخدام المنزلي العادي لأسرة مكونة من خمسة أفراد باستخدام سخان شمسي مكون من خزان سعة 120 لترًا ومجمع شمسي مكون من 20 أنبوبًا مفرغًا بالإضافة إلى خزان لتخزين الوسائط المسامية بسعة 50 لترًا. أجريت التجارب بدون استخدام وسائط مسامية وباستخدام مستويات مختلفة من الوسائط المسامية (150 ، 300 ، 450 ملم). أظهرت النتائج أن زيادة مستوى الوسائط المسامية تساهم في إمداد الماء الساخن عند درجة حرارة مفيدة للاستخدام المنزلي (فوق 20س ج) على مدار اليوم .

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“…At the same time, when it comes to high-power accumulators (industrial applications), shell-and-tube accumulators are more often mentioned [58][59][60]. It is known that several pilot installations use heat accumulators with a PCM for industrial use with a capacity of up to 1.6 MW [61][62][63]. These installations are used for heating heat transfer fluids, including steam generation, and, in general, much is said about the operability of this technology.…”

Section: Introductionmentioning

confidence: 99%

Heat Storage as a Way to Increase Energy Efficiency and Flexibility of NPP in Isolated Power System

Lebedev,

Deev

2023

Applied Sciences

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This paper considers a thermal accumulator using phase transition materials as a way to increase the energy efficiency and maneuverability of nuclear power plants. A low-power nuclear power plant is the object of this study. Such nuclear power plants have a great potential for widespread implementation as sources of thermal and electrical energy for facilities of mineral and raw material as well as fuel and energy complexes located in distant regions. The main principles of development of low-power nuclear power plants are revealed. So, in the development of low-power nuclear power plants, experience in the creation and operation of shipboard nuclear power installations is widely used. The problems of NPP operation in daily maneuvering modes within an isolated power system are revealed. A method for improving the energy efficiency and maneuverability of nuclear power plants is proposed, in particular, through the use of thermal accumulators with a phase change material directly in the NPP circuit. A method of assessment of the dimensions of the heat accumulator and the amount of heat accumulating material is presented. A method of assessment of the efficiency of the accumulator application scheme is presented. The thermal scheme of a promising low-power nuclear power plant with an RITM-200 reactor is compiled. A scheme for switching on a heat accumulator with a phase change material to a scheme for regenerative heating of a turbine is proposed. The heat storage material selection is made, the main elements and characteristics of such an accumulator are determined, and the parameters of the heat transfer fluid’s movement through the accumulator are determined. A mathematical model of the heat exchange in an accumulator based on the finite difference method is compiled, and the simulation results are presented. The results of the experimental verification of the model are presented. As a result of the calculation of NPPs’ thermal schemes in the standard version and the version with a heat accumulator, the power increase in the turbine plant due to the application of accumulated heat in the accumulator discharge mode is determined.

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Application of Phase Change Material and Artificial Neural Networks for Smoothing of Heat Flux Fluctuations

Cited by 9 publications

References 69 publications

TES Nanoemulsions: A Review of Thermophysical Properties and Their Impact on System Design

TES Nanoemulsions: A Review of Thermophysical Properties and Their Impact on System Design

Influence of Porous Materials on Growing the Time of Hot Water Supply for the Solar Collector

Heat Storage as a Way to Increase Energy Efficiency and Flexibility of NPP in Isolated Power System

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