Phase Change Heat Research Articles

Experiment and finite element analysis of asymmetrical hardness induced by quenching in railway wheel

Excellent properties of railway wheels are of vital significance for adapting to complex and changeable operating environments to reduce maintenance costs and extend service life. This paper presents the results suggesting that the hardness distribution in wheel rim is of obvious inhomogeneity, especially in areas near and away from the flange as ‘on two rim sides’, which undoubtedly affects the subsequent use of the wheel, such as eccentric abrasion and peeling. Product properties (hardness of wheels) are determined, to a certain extent, by temperature and microstructure changes caused by relevant parameters during water–air alternate spraying process. It leads to differences in heat transfer between the surface and the medium or internal heat conduction. To fully investigate such a complicated quenching, a thermo-phase modeling of wheel quenching was used with transient heat transfer, phase change and hardness calculation taken into account. It was found that unsynchronized cooling on both sides of the rim alters the phase behavior of bainite and martensite, especially in stage III of spraying. However, as the depth from the tread increases, the hardness difference becomes almost less obvious. In this condition, the angle of spraying becomes the key parameter influencing temperature–time process during cooling. The calculated results reveal that the hardness is gradually unified on two rim sides by adjusting the deflection angle of spraying that was simultaneously applied to the tread and the rim. The effect of the adjustment was verified experimentally through subsequent actual wheel production. The test analysis mode combined with transient thermal simulation model can be used to effectively and rapidly optimize parameters for intelligent heat treatment process.

Recent advancements in latent heat phase change materials and their applications for thermal energy storage and buildings: A state of the art review

Phase change materials (PCMs) have received substantial interest for their ability to store and release latent heat for energy conservation and thermal control purposes. PCMs are available in a variety of latent heat and melting points but their performance is low due to low value of thermal conductivity which limits its usage. The addition of highly thermal conductivity nanoparticles, porous metal foams and encapsulation methods have been used to address this issue and try to fix the low thermal conductivity of PCMs which is broadly discussed in this manuscript. The ability of PCM to store and release the thermal energy prompted the researchers to use it in potential applications. The energy retained and emitted by PCMs may be used for a variety of purposes, such as in photovoltaic (PV) panels, thermoelectric generators, building air-conditioning, air and water heating systems, heat exchangers, desalination solar stills, textiles, thermal management of electronic equipment and batteries and food packaging. Therefore, in this review, first the advancements in thermal properties of PCMs are thoroughly discussed in terms of enhancement in melting and solidification rates. After that, the use of PCMs in various applications is then explored, and conclusions are drawn accordingly. Based on analysis of recent literature, it was discovered that the phase transition temperature, phase transition enthalpy and thermal conductivity are three important parameters for the selection of an appropriate PCM for use in various applications. The current status of these advanced energy storage materials is also presented in this review. Lastly, some challenges and future recommendation are also proposed for future researchers which will bring a revolution in thermal management field.

Characterization of The Heat Transfer on Spray Quenching for Different Material Properties

A broad range of water spray applications as a means of two-phase cooling scheme has encouraged researches in the thermal management system to support safety and process efficiency in industries. In the application of above saturation temperature, the cooling process follows the boiling curve where the dissipated heat flux is figured out as a function of the wall temperature. Knowledge on constructing the boiling curve is an essential part in order to define the moving boundary, and boundary value problems occur in metal cooling process analysis involving heat transfer and phase change. The objective of the research was to characterize the boiling parameters on different materials in the regime of film boiling, transition boiling, and nucleate boiling as the basis for its boiling curve construction. To explain the influence of material properties, this work is featuring, firstly, the calculated vapor film thickness in film boiling regime by promoting self-developed analytical model of single droplet and, secondly, the calculated boiling width which indicates a strong combination of surface temperature and heat flux observed as the boiling phenomena. This is obtained by calculating the propagation of wetting front and 100 o C points. This experimental work employed a volumetric spray flux of 4.2, 10 and 13.7 kg/m 2 s to cool a hot metal samples of aluminum alloy AA6082 and nickel heated up to 560 °C. An infrared camera was used to record the temperature drop over time. Heat flux calculation follows the numerical procedure according to 1D energy balance model. Calculated vapor film thickness explains why the HTC tends to increase with the decrease of the surface temperature . Leidenfrost and Departure from Nucleate Boiling (DNB) temperatures are found to be inversely proportional to the heat penetration coefficient of the metal while maximum heat flux and boiling width increase with it.

An approach to accelerate the convergence of SIMPLER algorithm for convection-diffusion problems of fluid flow with heat transfer and phase change

A new segregated pressure-based algorithm is developed to solve two-dimensional incompressible fluid flows with convective heat transfer and liquid to solid phase change by the finite volume method. The predictive-correction scheme is based on the SIMPLER algorithm with n added iterative cycles to increase the accuracy of pressure in satisfying the discretized continuity equation. The performance of SIMPLERnP is compared with SIMPLER and IDEAL in the solution of the laminar fluid flow in a lid driven cavity, natural heat convection inside a square cavity, convective heat transfer in the annular space between two concentric cylinders and conjugate natural heat convective solidification of a binary alloy that included the transient heat conduction in the thick mold walls. The results indicate that the proposed algorithm is highly stable, even when a value of 0.99 is used for the under-relaxation of the velocity components, and allows significant improvements in the reduction of the number of iterations and time of computation.

Numerical analysis of cellulose nanocrystals CNC for reducing cold damage to reproductive buds in fruit crops

Computational fluid dynamics (CFD) modeling of transient heat transfer was performed using ANSYS Fluent during the freezing process of buds treated with cellulose nanocrystal (CNC) to better understand the thermal behavior of CNC and the mechanism by which it provides cold damage protection. The numerical model developed were able to predict the temperature transition and the time required for the bud ice nucleation: the ice nucleation for the control bud started around 1080 s at about 270.2°K (−2.95 °C), while the ice nucleation for the CNC treated bud started around 1450 s at about 268°K (−5.15 °C). The CNC reduced the heat loss due to outgoing radiation to the external environment and decreased the heat flow loss due to convection heat transfer. As a result, CNC delays the formation of intracellular ice at low temperatures and protecting cold damage. The CFD simulation results of temperature distribution profiles were compared with the experimental data, yielding an average relative error of less than 15%. CFD model was able to estimate the convection heat flow, radiation heat transfer, and latent heat (phase change), all of which are difficult to investigate by making measurements in lab conditions.

Optimum design of a double elliptical latent heat energy storage system during the melting process

This paper concerns the optimum design of double elliptical latent heat storage units during the charging process using three-dimensional numerical simulation. Water and RT35 are employed as the heat transfer fluid and phase change material, respectively. The orientations of both inner and outer elliptical tubes, the number of inner tubes, and the comparison between the straight and wavy configurations for the inner tubes are examined to find the maximum melting rate. Moreover, the sensitivity analysis on the operating conditions, including the Reynolds number and inlet water temperature, is performed. The results show that the best performance is found when the inner and outer tubes are oriented vertically and horizontally, respectively. The performance of the unit enhances as the distance between the inner tube and the bottom wall of the outer tube reduces. Besides, the optimum place for positioning the inner tube is where the minimum distance of the ellipses is 2 mm. It is found that the implementation of double wavy inner pipes increases the heat transfer surface area, which accelerates the melting time by 2.17. The delivered energy rate to the PCM using double wavy inner tubes is 218.75 W/kg, while it is 180.4 W/kg using double straight inner tubes. Eventually, the sensitivity analysis confirms the system is more sensitive to the variations of inlet temperature compared to the Reynolds number regarding the tested operating conditions.

Hybrid thermal performance enhancement of shell and tube latent heat thermal energy storage using nano-additives and metal foam

Phase change materials (PCMs) are popular for effectively storing thermal energy due to their high thermal energy density and nearly constant operating temperature. However, a restriction for their effective application comes up due to their poor thermal conductivity. The main aim of this numerical investigation is to analyze the potential of two heat transfer augmentation methods, (i.e., metal foam and nano-additives) for a shell and tube. A mathematical formulation considering the extensions of Brinkman and Forchheimer made on the model of Darcy for porous media is validated with experimental data available in literature and used for simulations. The model is used via a commercial CFD code for simulations of heat transfer and phase change evolution during both charging and discharging processes in the heat exchanger. The thermal performance of the heat exchanger is examined through liquid fraction evolution, time for complete cycle and stored energy. The effects of operational and structural parameters including inlet temperature, metal foam material, foam porosity (0.95 and 0.98), pore density (10, 40, and 70 ppi), and nanoparticle volume fraction (0, 1 and 3 vol%) are investigated. Results show that the metal foam material and nanoparticle concentration have a significant effect on the thermal performance of PCM in shell and tube. Metal foam and graphene nanoplatelets reduce the charging and discharging times by up to 96.11% and 96.23%, respectively. Furthermore, lower porosity foam expedites the charging/discharging process whereas the pore density has no noticeable effect. The findings of this study are hoped to be helpful for designing efficient thermal energy storage units.

A Fast-Reduced Model for an Innovative Latent Thermal Energy Storage for Direct Integration in Heat Pumps

In the present paper, the numerical modeling of an innovative latent thermal energy storage unit, suitable for direct integration into the condenser or evaporator of a heat pump is presented. The Modelica language, in the Dymola environment, and TIL libraries were used for the development of a modular model, which is easily re-usable and adaptable to different configurations. Validation of the model was carried out using experimental data under different operating modes and it was subsequently used for the optimization of a design for charging and discharge. In particular, since the storage unit is made up of parallel channels for the heat transfer fluid, refrigerant, and phase change material, their number and distribution were changed to evaluate the effect on heat transfer performance.

Holistic 1D Electro-Thermal Model Coupled to 3D Thermal Model for Hybrid Passive Cooling System Analysis in Electric Vehicles

Thermal management is the most vital element of electric vehicles (EV) to control the maximum temperature of module/pack for safety reasons. This paper presents a novel passive thermal management system (TMS) composed of a heat sink (HS) and phase change materials (PCM) for lithium-ion capacitor (LiC) technology under the premise that the cell is cycled with a continuous 150 A fast charge/discharge current rate. The experiments are validated against numerical analysis through a computational fluid dynamics (CFD) model. For this purpose, a comprehensive electro-thermal model based on an equivalent circuit model (ECM) is designed. The designed electro-thermal model combines the ECM model with the thermal model since the performance of the LiC cell highly depends on the temperature. Then, the robustness of the model is evaluated using a precise second-order ECM. The extracted parameters of the electro-thermal model are verified by the experimental results in which the voltage and temperature errors are less than ±5% and ±4%, respectively. Finally, the thermal performance of the HS-assisted PCM TMS is studied under the fast charge/discharge current rate. The 3D CFD results exhibit that the temperature of the LiC when using the PCM-HS as the cooling system was reduced by 38.3% (34.1 °C) compared to the natural convection case study (55.3 °C).

Improvement of the thermal performance of a solar triple concentric-tube thermal energy storage unit using cascaded phase change materials

In this study, the thermal performance of the storage unit of a solar domestic hot water (SDHW) system incorporating triple concentric-tube latent heat storage modules filled with cascaded phase change materials (cascaded PCMs) was numerically investigated. The triple concentric-tube storage modules were filled with three marks of phase change material (RT62HC, RT54HC and RT44HC) with melting points of 63 °C, 54 °C and 43 °C, respectively. The heat transfer fluid (HTF: water) was received solar thermal energy from the solar collector absorber and transferred it by forced convection to the cascaded PCMs which stored it as latent heat. A model based on the enthalpy method was elaborated to predict the combined heat transfer and phase change processes. The natural convection effect during phase change was taken into consideration through an effective thermal conductivity of liquid PCMs. The elaborated numerical model was verified and validated by comparing the predictions with the previously published experimental and numerical results. The thermal performance of the cascaded thermal energy storage tank was evaluated under the weather conditions of the month of July in Marrakesh city (Morocco), and compared with that for single-PCM storage tank during the charging process.

Numerical modelling of permafrost dynamics under climate change and evolving ground surface conditions: application to an instrumented permafrost mound at Umiujaq, Nunavik (Québec), Canada

ABSTRACT Numerical simulations were carried out based on a conceptual cryohydrogeological model of a permafrost mound near Umiujaq, Nunavik (Québec), Canada, to assess the impacts of climate warming and changes in surface conditions on permafrost degradation. The 2D model includes groundwater flow, advective-conductive heat transport, phase change and latent heat. Changes in surface conditions which are characteristic of the site were represented empirically in the model by applying spatially- and temporally-variable ground surface temperatures derived from linear regressions between monitored surface and air temperatures. After reaching a transient steady-state condition close to present-day conditions, the simulations were then extended to 2100 under hypothetical climate warming scenarios and using imposed changes in surface conditions consistent with observed on-site evolution. The simulations show that the development of a thermokarst pond and shrubification respectively induce ground warming of up to 0.5°C and 1.5°C, upward migration of the permafrost base by up to 2 and 4 m, and a decrease in the lateral permafrost extent of 1 and 7 m, relative to a reference case without changes in surface conditions. Feedback from permafrost degradation which drives changes in ground surface conditions should be included in future numerical modelling of permafrost dynamics.

Structure effect of the envelope coupled with heat reflective coating and phase change material in lowering indoor temperature

The building envelopes that integrate heat reflective coatings (HRCs) and phase change materials (PCMs) can block solar radiation from outdoors and have a high thermal inertia, which helps lower the indoor temperature and save the cooling energy costs. However, an inappropriate combination of the two materials could lead to a worse cooling performance. This paper studies the cooling performance of a wall which is coated with the HRC, coupled with a cavity filling the PCM and insulation materials. This work intends to find out the optimal way of integrating the HRC and PCM together to improve the passive cooling performance of the envelope. The effects of the relative positions of HRC and PCM boards on the indoor temperature are studied by comparing 15 combinations of HRCs and PCMs. The results show that the HRC coated on the exterior surface of the wall can block the radiation heat more efficiently than that on the interior surface. An insulation layer between the HRC and PCM is essential to improve the thermal regulation performance of the wall. The insulation layer avoids the fast heat conduction through the PCM and decouples the roles of the HRC as a radiation reflector and the PCM as a thermal storage medium. The thermal conductivity of PCMs, the thickness of PCM layers as well as insulation air gap are also changed to investigate their influence on temperature fluctuations. The RT31/SiO2 (0.09 W/m K) can effectively reduce the indoor temperature by up to 3.6°C compared with the RT31/expanded graphite (EG) (1.25 W/m K). The optimum thickness of both PCM cavity and air cavity are no more than 8 mm. The work provide an insight into the optimal combination of the PCM and HRC in the building envelope for passive cooling.

Performance evaluation of three latent heat storage designs for cogeneration applications

Well-integrated thermal energy storage units can enhance flexibility and profitability for a cogeneration system by enabling its decoupling of electricity and heat production. In the present study, novel latent heat thermal energy storage technologies are numerically investigated on their thermal and economic performance to evaluate their implementation at an existing combined cycle power plant. Three commercially available storage designs are analyzed: one shell-and-tube heat exchanger design based on planar spiral coils, and two types of advanced macro-encapsulated designs with capsules resembling ellipsoid and slab in shape, respectively. For the spiral coil design, three-dimensional flow velocity and temperature fields are simulated with finite volume method to predict the transient storage heat transfer process, including the effect of secondary flow induced by centrifugal forces. For the macro-encapsulated designs, effective heat transfer coefficients between heat transfer fluid (HTF) and phase change material (PCM) are inferred from scaled-down storage prototyping and testing. A one-dimensional two-phase packed bed model was developed based on the apparent heat capacity-based enthalpy method to numerically study the heat transfer in macro-encapsulated PCM. With an operating temperature range of 46–72 °C and a HTF supplying flowrate range of 4.2–8.4 m3/h defined by the cogeneration strategy, thermal power and accumulated storage capacity are calculated and compared for the first three hours of charge and the first hour of discharge for the three designs. The effect from increasing the HTF flowrate to accelerate charging/discharging processes is indicated by the simulation results. Performance comparison among the three designs shows that the slab capsule design exhibits the highest accumulated storage capacity (710 kWh) and state of charge (40%) after three hours of charge, though it has a lower theoretical total storage capacity (1760 kWh) than the spiral coil design (1830 kWh). The ellipsoid capsule design shows a slightly lower accumulated storage capacity (700 kWh) than the slab design for 3-hr charge and an equivalent accumulated storage capacity/depth of discharge (250 kWh/14%) as the latter. Furthermore, the storage power cost of the slab capsule design is the lowest, by 6–12% lower than the spiral coil design and by 2–3% lower than the ellipsoid capsule design. However, with the highest design flowrate of 8.4 m3/h, the low state of charge (below 40%) after three hours and the low depth of discharge (below 14%) after one hour indicate that redesigning the heat transfer boundary conditions and the configurations of the three units are necessary to meet desirable storage performance in cogeneration applications.

A hybrid vapor chamber heat sink incorporating a vapor chamber and liquid cooling channel with outstanding thermal performance and hydraulic characteristics

Facing higher and higher heat load and more rigorous limitations on energy consumption, conventional heat sinks and vapor chambers are falling short of new requirements. In this paper, a hybrid vapor chamber heat sink (HVCHS) of liquid cooling is developed, wherein the active liquid cooling channel is embedded in the vapor region of the vapor chamber so that two modes of heat transfer, phase change and single-phase heat transfer, are incorporated in a single device. The thermal performance, hydraulic characteristics, and cooling coefficient of performance (COP) of the HVCHS are investigated. The hybrid design provides a high cooling capacity of 1200 W using a 9 cm2 heater and maintains the maximum junction temperature of 95.25 °C simultaneously. The streamwise temperature rise is only 2.04 °C on the bottom surface under the maximum cooling capacity, which shows great temperature uniformity under high power. The minimum thermal resistance is as low as 0.04 °C/W and is compared with some previous studies. The minimum pressure drop is 4.83 kPa with the corresponding pump power of 80.5 mW. The cooling COP is above 12,500 for heat inputs of more than 850 W. The HVCHS may have great potential for the energy-saving cooling management of high-performance electronics.

SPH simulation of supercooled large droplets impacting hydrophobic and superhydrophobic surfaces

Hydrophobic and superhydrophobic coatings are of great interest to the aerospace community as a measure to mitigate performance losses due to ice formation in flight. To numerically investigate the supercooled large droplets (SLDs) impacting such coated surfaces, a multiphase smoothed particle hydrodynamics (SPH) solver is developed by solving the Euler momentum equations for fluid dynamics, the energy equation for heat transfer and a latent heat model for phase changes. A continuum surface tension term is included in the momentum equations and a robust contact angle model that corrects the surface tension near triple-phase points is proposed to calculate the non-wetting effects of surfaces. The present solver is capable of modeling droplets impacting, spreading, retracting on and/or rebounding from hydrophobic/superhydrophobic surfaces, with heat transfer and phase change. It is first validated against the evolution of droplets on solid surfaces of various contact angles and then applied to droplets impacting hydrophobic and superhydrophobic surfaces at different temperatures. This work investigates SLD impingement and solidification on hydrophobic and superhydrophobic coatings and provides a base for the numerical experimentation of a single SLD icing behavior at in-flight speeds.

Prediction of Transient Temperature Distributions for Laser Welding of Dissimilar Metals

Distribution of temperature during the welding process is essential for predicting and realizing some important welding features such as microstructure of the welds, heat-affected zone (HAZ), residual stresses, and their effects. In this paper, a numerical model was developed using COMSOL Multiphysics of dissimilar laser welding (butt joint) of AISI 316L and Ti6Al4V thin sheet of 2.5 mm thickness. A continuous mode (CW) fiber laser heat source of 300 W laser power was used for the present study. A time-dependent prediction of temperature distributions was attempted. The heat source was assumed as a Hermit–Gaussian analytical function with a moving velocity of 120 mm/min. Both convective and radiant heat loss and phase change of the materials were considered for the analysis. In addition, variation of temperature-dependent material properties was also considered. The maximum and minimum temperature for the two materials at different times and the temperature in the different penetration depths were also predicted. It was found that the average temperature that can be achieved in the bottom-most surface near the weld line was more than 2400 K, which justifies the penetration. Averages of maximum temperatures on the weld line at different times at the laser spot irradiation were identified near 3000 K.The temperature fluctuation near the weld line was minimal and decreased more in the traverse direction. Scanning with a displaced laser relative to the interface toward the Ti6Al4V side reduces the maximum temperature at the interface and the HAZ of the 316L side. All of these predictions agree well with the experimental results reported in current literature studies.

Preparation and properties of composite phase change material based on solar heat storage system

Solar phase change hot water storage tank is a kind of storage / exothermic system with solar energy as heat source and phase change heat storage material. It can store heat during the day, continue to operate at night with stored heat without consuming other energy. Because of the poor thermal conductivity of solid-liquid phase heat storage materials, carbon fiber is added to enhance the thermal conductivity of phase change materials. Stearic acid is used as phase change material, carbon fiber as heat transfer material and ethyl cellulose as auxiliary material to prepare carbon fiber / stearic acid composite phase change material. Carbon fiber / stearic acid in the mass ratio of 7.5:92.5 is the optimal material and the chemical compatibility, phase change temperature, phase change latent heat, thermal conductivity and thermal stability of carbon fiber / stearic acid are measured by using SEM, XRD and DSC. From the DSC test, the latent heat capacity was determined as 192.6 J/g and the phase change temperature as 67.7°C. Thermal conductivity was measured as 0.4011 W/m⋅K. The storage / exothermic experimental system of carbon fiber / stearic acid composite phase change material is built. The melting process and solidification process of the composite phase change material are tested, and the storage / exothermic characteristics are analyzed. SEM and DSC analysis results revealed that the PCM had high thermal stability. XRD revealed that the binary eutectic mixture had good chemical stability. Thus, the new PCM possessed high latent heat with good thermal and chemical stabilities making it a potential phase change material for solar heat storage applications.

Molten pool characteristics of a nickel-titanium shape memory alloy for directed energy deposition

Fabrication of nickel-titanium shape memory alloy through additive manufacturing has attracted increasing interest due to its advantages of flexible manufacturing capability, low-cost customization, and minimal defects. The process parameters in directed energy deposition (DED) have a crucial impact on its molten pool characteristics (geometry, microstructure, etc.), thus influencing the final properties of shape memory effect and pseudoelasticity. In this paper, a three-dimensional numerical model considering heat transfer, phase change, and fluid flow has been developed to simulate the cladding geometry, melt pool depth, and deposition rate. The experimental and simulated results indicated that laser power plays a critical role in determining the melt pool width and deposition rate while scan speed and powder feed rate have less effect on cladding geometry and deposition rate. The fluid velocity has a huge influence on the distribution of elements in the molten pool. The temperature gradient G, solidification rate R, as well as shape factor G/R were calculated to illustrate the underlying mechanisms of grain structure evolution. The grain morphology distribution of cross-section from the experimental samples agreed well with the simulation results. The model reported in this paper is expected to shed light on the optimization of the deposition process and grain structure prediction.

Investigation on battery thermal management based on phase change energy storage technology

Electric vehicles are gradually replacing some of the traditional fuel vehicles because of their characteristics in low pollution, energy-saving and environmental protection. In recent years, concerns over the explosion and combustion of batteries in electric vehicles are rising, and effective battery thermal management has become key point research. Phase change materials (PCM) can absorb or release a large amount of latent heat during the phase change process while maintaining a constant temperature (phase change temperature). In this paper, STAR-CCM+ software is used to carry out three-dimensional simulation of single cell and battery packs with PCM to investigate changing characteristics of battery temperature rise and temperature difference during the cooling and heat preservation process. At the same time, temperature rise and temperature difference of battery are analyzed under different ambient temperatures, convection heat transfer coefficients and phase change latent heats of PCMs. In summer, at an ambient temperature of 30 °C, when using PCM, the battery cell temperature can be reduced by 4 °C in 1800 s, which is about 8.6% lower than that without PCM. In winter, at an ambient temperature of −5 °C, the PCM with a melting point about 20 °C can keep the battery cell temperature drop of no more than 28% within 6700 s at a higher convection coefficient of 5 W/m2·K. Comparing the temperature of the battery pack with that of the battery cell, in the summer with an ambient temperature of 30 °C, the temperature of the battery pack decreased by 13.3 °C in 3600 s, while in the winter with an ambient temperature of −30 °C, the temperature of the battery pack increased by 14.3 °C in 5700 s. The use of phase change materials is conducive for batteries in electric vehicles to dissipate heat in summer and preserve heat in winter.

Thermal energy storage system applicable to vehicles

The paper presents the state of the art for thermal energy accumulators using the latent heat phase change usable in cars with either internal combustion engine or electric. The new materials with high storage capacity are presented and the most important achievements in this field of thermal energy storage on vehicles. The case study presented in the paper brings some information necessary for the development of thermal accumulators, with phase change materials, showing the important parameters and characteristics and what values they must have (e.g.: required and accumulated energy; charging and discharging time; latent heat, geometric characteristics). The paper presents a possible classification of these types of batteries, thus facilitating the development of products specific to the applications in which they are included. The work will continue with numerical and experimental studies on models developed based on the case study described here. If at present, in the case of electric cars, a reduction of approx. 20% of electricity was obtained by implementing thermal batteries with phase change material, then studies or research become necessary to accelerate their development on an industrial scale in competitive economic conditions.