Latent Heat Properties Research Articles

Preparation and characterization of fatty acid ternary eutectic mixture/Nano-SiO2 composite phase change material for building applications

In order to prepare a composite phase change material (PCM) with suitable phase transition temperature, strong temperature control performance, good latent heat properties, and low cost for incorporation into concrete, the goal is to control temperature cracks, and endow the building structure with temperature regulation capabilities through phase change. In this study, capric acid (CA), myristic acid (MA) and stearic acid (SA) were used as PCMs. Firstly, based on theoretical calculations, a ternary eutectic mixture of CA-MA-SA with a mass ratio of 67.16:22.98:9.86 was successfully prepared. Subsequently, a new composite PCM was created using a melt blending technique, incorporating nano-SiO2 as a supporting material. The comprehensive characterization results from FT-IR, SEM, XRD, DSC and TG indicate that nano-SiO2 interacts with CA-MA-SA through its porous structure and capillary action, as well as surface tension, rather than through any chemical interaction, when 65% of CA-MA-SA is adsorbed in nano-silica, the melting temperature and latent heat of the composite PCM are 19.23 °C and 97.82 J/g, respectively. Without any leakage of molten CA-MA-SA. This material exhibits a favorable temperature for phase transition and possesses a high amount of latent heat, making it a promising candidate for use in construction projects. Additionally, the composite PCM shows remarkable thermal stability after 200 phase change cycles, which not only lowers building energy usage but also conserves energy, making it ideal for broad use in civil engineering.

Numerical investigation of battery thermal management by using helical fin and composite phase change material

Li-ion batteries have become an indispensable part of modern life thanks to their portability, energy density, fast charge-discharge capability and various application areas. The thermal performance of the PCM promising method for battery thermal management systems (BTMS) is limited due to weak thermal conductivity property. The aim of this study is to investigate the contribution to the performance of BTMS by using innovative helical fins to improve the heat transfer performance of PCM due to its low thermal conductivity. Besides, the study includes composite phase change material (CPCM) due to advantages in practice such as form stability, mechanical behavior and higher thermal conductivity compared to PCM. In this scope, a hybrid system including helical fin and CPCM, paraffin-based expanded graphite (EG), is numerically investigated to ensure thermal control of a Li-ion battery in this study. Results shows that safe operating time is prolonged by increasing the widths and the number of rounds of the helical fin. However, the contribution of the EG fractions on the BTMS is ordered as an EG fraction of 12 % > 6 % > 20 % > 0 % due to a balance between the thermal conductivity and the latent heat property. The longest safe operating time is obtained by using Fin_W6-NR3 for EG fraction of 12 % in the CPCM as 9316 s corresponding to 244.0 % higher than the case of EG = 0 % and no fin used.

Battery thermal management system optimization using Deep reinforced learning algorithm

The temperature of the battery plays a critical role in the working conditions and a suitable temperature environment can help the battery extend its capacity. Air cooling and water cooling are prevalent as positive heat dissipation methods used in research. Phase change material (PCM) has a good heat dissipation capacity because of its latent heat property. Therefore, PCM is chosen as the battery thermal management method in this study. Adding two water channels in the center of the pack strengthens the heat dissipation capacity. Deep reinforcement learning (DRL) is used to explore the multi-optimal solution of the battery thermal arrangement, and its results are compared with the classical methods such as NSGA-ii and MOPSO. Max temperature, temperature difference of the battery, and average temperature of PCM are selected as the optimization targets. A comparison between DRL optimization and the initial system shows that the increased max temperature decreased by 0.33 ℃ (2.1%), and the average temperature of PCM decreased by 0.3 ℃ (2.3%). The temperature difference of DRL optimization decreased by 1.3% compared with that of NSGA-ii and MOPSO. The max temperature decreased by 0.2% and the average temperature of PCM decreased by 0.3% compared with those of NSGA-ii. In summary, DRL has the potential application in battery thermal management system (BTMS) optimization. The most important contribution of this work is utilizing DRL in the optimization process, which shows better results than existing optimization methods.

Preparation and performance of lauric acid phase change material with the double-layer structure for solar energy storage

The use of phase change materials (PCM) to absorb and store solar energy is one of the ways to solve the problem of increasing energy consumption in buildings. However, most of the PCM has low thermal conductivity and poor photothermal conversion performance, which limits their application in the building. In this study, it was proposed that a lauric acid-based bilayer material with good thermal conductivity and photothermal conversion performance. Specifically, sodium dodecyl sulfate (SDS) was used to combine carbon black (CB) and lauric acid (LA) in the upper layer to enhance photothermal conversion, and expanded graphite (EG) was added in lauric acid in the lower layer to enhance heat transfer. The synthesis ratio, thermal conductivity, latent heat, and heating rate of the LA/CB-LA/EG were tested. This study concluded that the preferred ratio of the photothermal conversion material in the upper layer is 100:5:1 (LA: CB: SDS), and the preferred ratio of the lower layer material is 100:1.4 (LA: EG). In addition, the addition of carbon material has only a small effect on the latent heat properties of the whole material. To verify the physical properties of the bilayer material, we tested the surface heating rate of the material and the inner material during the photothermal conversion of the material. The experimental results show that the surface temperature rise rate of LA/CB-LA/EG is 217 % of that of LA and 109 % of that of LA/EG in the time range of 30 min. The internal temperature rise rate of LA/CB-LA/EG is 226 % of LA and 136 % of LA/EG, respectively. Finally, we build the model in the numerical study and test it after inputting the physical parameters. The results show that the heating hours can be reduced by more than 50 % in winter using the above scheme, so this work achieves the purpose of energy saving and emission reduction.

Shape-stabilized composite phase change material for thermal insulation of cotton fabrics with sandwich structure

Disodium phosphate dodecahydrate was hybrid with n-octadecane as the phase change material (PCM) by reversed-phase emulsification. The cellulose sponge obtained based on cellulose nanocrystals was used as the support material to fabricate a shape-stable composite phase change material (CPCM) through impregnation. It was laminated with cotton fabric to obtain a sandwich structure thermal insulation fabric. An infrared spectrometer, scanning electron microscope, differential thermal scanning calorimeter, and other equipment were used to characterize the morphology, chemical groups, and latent heat properties of CPCMs and thermal insulation fabrics. The results displayed that the cellulose sponge had a porosity of 99.03%, a density of 0.012 g/cm3, and could withstand 1900 times its weight. When the mass proportion of PCM in the composite system was 67.5%, its latent heat energy was 84.44 J/g, which also revealed optimal shape stability. Compared to the original fabric, the thermal insulation efficiency of the sandwich structured fabric was increased by 17.7%∼18.2%, and the photothermal conversion rate reached 25.88%, with good application performance.

Preparation and selection of a eutectic phase change material for cooling the PV module under Thailand climatic conditions

Several studies have found that incorporating an appropriate melting temperature (Tmelt) of Phase Change Material (PCM) behind the PV module enhances the cooling effect. In this study, PCM is selected for hybrid cooling for summer and winter using six years of meteorological data obtained from NASA. Considering the hybrid cooling method, winter season Tamb is selected to optimize the Tmelt as the selected PCM must reach the latent heat property in an early sunshine. It is found that during winter, 70 % of the period, Tamb lies around 28 °C whereas the Tmelt of PCM should be in the range of 31-34 °C according to the modified optimization method. In total, twelve combinations of eutectic mixtures are prepared using Lauric Acid (LA), Myristic Acid (MA) and Stearic Acid (SA), and their thermophysical properties are analysed using a differential scanning calorimeter. Only seven eutectic mixtures attain the 31-34 °C Tmelt among that LA:MA (70:30) and LA:SA (70:30) show excellent latent heat of fusion of 194 J/g and 190 J/g, respectively. Furthermore, it is recommended that LA:MA (70:30) and LA:SA (70:30) are suitable for Thailand’s climatic conditions for PV module cooling.

A combined technique using phase change material and jet impingement heat transfer for the exhaust heat recovery applications – A numerical approach

Increasing the development of industries and automobiles requires developing a new system to recover exhaust heat emitted from these sources. Phase change materials are known for energy storage because of their latent heat properties. With this idea, a combined technique of phase change material (PCM) and jet impingement heat transfer is proposed where the exhaust gas acts as an impinging jet on storage with phase change material. The study is performed numerically with ANSYS Fluent. Initially, the study involves validating numerical setup for melting of PCM and Jet impingement heat transfer with benchmark experimental data. Later, both models are combined to study exhaust heat recovery. Parametric studies are performed by changing the materials, temperature, Reynolds number, spacing ratio (ratio of the height of the exhaust inlet from the impinging plate to the diameter of inlet), and orientation of the system. The parametric study reveals several important characteristics to be considered while choosing the material, such as conductivity and latent heat. The temperature study shows that the significance of the Reynolds number is reduced as the temperature is increased. By changing the spacing ratio from 2 to 6, the energy recovery is decreased by 23 %. However, changing the orientations of the system has shown a significant improvement on the energy recovery.

Investigation of the corrosion of electro-less nickel-plated alloys in molten salt and its effect on phase change properties for energy storage applications

Interactions between electroless nickel plated Inconel 601, Monel 400, and stainless steel 316L alloys with two eutectic salts used as phase change materials, K2CO3 + Na2CO3 and NaCl + Na2CO3, were investigated at 720 °C (isothermal). The results of this study show that at these high temperatures, which is the target temperatures of the next generation of concentrated solar thermal power plants, these salt phase change materials are highly corrosive to stainless steel, whereas the Inconel 601, a high temperature nickel alloy, was resistant. Monel 400 experienced the most corrosion damage (500 µm thick corrosion layer) and resulted in the salts experiencing the greatest latent heat decrease by 18.1%, as confirmed by Differential Scanning Calorimetry (DSC). IN601 performed the best with an observed corrosion layer thickness of 107 µm, and resulted in one of the salts only decreasing in latent heat by 5.9%. IN601 with the nickel plating has shown improved corrosion resistance over uncoated samples. The thermophysical properties of the salt was measured before and after the exposure tests to demonstrate the significant effect corrosion has on the performance of the salts as a phase change material. Scanning Electron Microscopy (SEM) analysis showed that constituent elements have diffused from the alloy specimens, through the nickel plated layer and leached into the molten sat, which was characterized by Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES). A correlation was found between the corrosion of the specimens, the solubility of the alloying elements and a large decrease in the salt’s latent heat properties.

Thermal performance of phase change material embedded in building Wall- a numerical analysis

Due to the energy demand the Phase Change Material (PCM) is used in the building envelope to reduce the inner room temperature. The PCM plays an important role in Thermal Energy Storage (TES). So, the PCM is used in the construction for energy conservation. Mostly device, by using a comparatively high storing density, constant phase change temperature and latent heat property. PCM is potentially appropriate as construction material as it is possible to combine into the building covering used for energy management. The main objective of using PCM is to enhancing the thermal performance of building to maintain a human thermal comfort. Ansys Transient thermal is the selected software to simulate the PCM in the building envelope. In this article a detail discusses about the numerical analysis of building thermal features with PCM materials on the wall for climatical situations in Chennai. The n- Octadecane (C18H38), Calcium chloride hexahydrate (CaCl2·6H2O) and Sodium carbonate decahydrate (Na2 CO3·10H2O) PCM are used in this analysis. The numerical test results show that nearly 4 to 5℃ fewer temperatures throughout the diurnal in the PCM filled building model, related by the without PCM packed model. From the simulation result can concluded that the usage of PCM in the building wall will also decrease the energy consumption for cooling that chamber.

Fundamentals, Thermophysical Properties, and Heat Transfer Characteristics of Nanorefrigerants: A Review

Cooling applications that utilize latent heat property of fluids involve large heat transfer and throw more space for energy conservative research studies. Heating ventilation air‐conditioning and refrigeration systems, which have now grown as an integral part in human life, circulate refrigerants and necessitate developments to become energy‐efficient. The heat removal characteristics of the fluids in such large capacity systems can be enhanced using nanoparticles seeded in to them. Being smaller in size, the nanoparticles possess larger effective surface area and believed to help in expediting the conduction rate of heat from the refrigerants in the HVAC‐R systems. Spectrums of nanoparticles are studied for their heat transfer behavior either in pure refrigerants or with refrigerant/oil mixtures. Suspension of the particles in the refrigerants for a prolonged time is found to be critical and must be validated prior to its implementation in the systems. Seeding of nanoparticles exclusively in a phase change fluid inside the refrigeration systems is reported to be of challenging. Additionally, to harvest the benefits of nanoscale particles, literature proposes the usage of surfactants which may lead to complex situation in a vapor compression refrigeration system. In the present work, all the relevant study details specifically on synthesis and characterization, thermophysical properties, and heat transfer characteristics about the nanorefrigerants are presented.

Enhancement of thermal energy absorption/storage performance of paraffin wax (PW) phase change material by means of chemically synthesized Ethylene Propylene Diene Monomer (EPDM) rubber network

Phase change materials (PCMs) are kind of energy storage systems utilized for thermal energy storage (TES) by virtue of high fusion latent heat property. In this research, Paraffin wax (PW) PCM and Ethylene-Propylene-Diene-Monomer (EPDM) were Vulcanized together by using various Benzoyl Peroxide contents to determine EPDM rubber network characteristics required for low leakage and high thermal performance. PCM systems were developed using vulcanized EPDM impregnation in high temperature molten PW. It is depicted that PW PCM system containing 5 wt.% Benzoyl Peroxide for EPDM curing has resulted in significantly higher thermal characteristics, while leakage was merely 0.81%, which is negligible and achieved along with PW shape stability in rubber network. Time -temperature performance of optimum PCM denotes that PW PCM presence could decrease rate of temperature change significantly. Furthermore, for adequate PCM system, more than 60% of inflow heat flux was absorbed.

Fabrication of temperature-regulating functional fabric based on n-octadecane/SWCNTs composite phase change material

PurposeFabrics with photothermal conversion functions were developed based on the introduction of shape stable composite phase change materials (CPCMs).Design/methodology/approachAcidified single-walled carbon nanotubes (SWCNTs) were selected as support material to prepare CPCMs with n-octadecane to improve the thermal conductivity and shape stability. The CPCMs were finished onto the surface of cotton fabric through the coating and screen-printing method. The chemical properties of CPCMs were characterized by Fourier transform infrared spectrometer, XRD and differential scanning calorimetry (DSC). The shape stability and thermal conductivity were also evaluated. In addition, the photothermal conversion and temperature-regulating performance of the finished fabrics were analyzed.FindingsWhen the addition amount of acidified SWCNTs are 14% to the mass of n-octadecane, the best shape stability of CPCMs is obtained. DSC analysis shows that the latent heat energy storage of CPCMs is as high as 183.1 J/g. The thermal conductivity is increased by 84.4% compared with that of n-octadecane. The temperature-regulating fabrics coated with CPCMs have good photothermal conversion properties.Research limitations/implicationsCPCMs with high latent heat properties are applied to the fabric surface through screen printing technology, which not only gives the fabric the photothermal conversion performance but also reflects the design of personalized patterns.Practical implicationsCPCMs and polydimethylsiloxane (PDMS) are mixed to make printing paste and printed cotton fabric with temperature-regulating functional is developed.Originality/valueSWCNTs and n-octadecane are composited to prepare CPCMs with excellent thermal properties, which can be mixed with PDMS to make printing paste without adding other pastes. The fabric is screen-printed to obtain a personalized pattern and can be given a thermoregulatory function.

Cylindrical battery thermal management based on microencapsulated phase change slurry

The present study focuses on application of microencapsulated phase change material (MEPCM) slurry in cooling electric cars' batteries. These materials, benefiting from their high latent heat property, are especially capable of heat absorption while they impose excessive pressure drop to the system. This study aims to establish a trade-off between the cooling efficiency and pressure drop of the system. 186 batteries whose model is 18,650 with a serpentine arrangement, similar to that of Tesla car model S, are considered. The maximum temperature inside the battery, the maximum temperature difference of the battery pack and the coolant pressure drop are investigated as the critical parameters. Moreover, the temperature variation along the serpentine channel is also studied. In order to examine the thermal performance of the system, the maximum temperature limit of 313 K and maximum temperature difference of 5 K are considered for the batteries. The studied variables are discharge rate (3C and 5C), concentration of the MEPCM slurry (10% and 20%), and fluid velocity (up to 0.4 m/s). Results show that, for a specified velocity, application of MEPCM slurry reduces maximum temperature and the maximum temperature difference with respect to water. However, when the velocity rises, this effect diminishes which means that the application of the proposed material results in higher pressure drop and more energy consumption. Results also indicated that for the discharge rate of 3C, by the application of 10% MEPCM slurry at 0.1 m/s, the minimum thermal requirements are fulfilled bringing about the least pressure drop. These conditions for the 5C discharge rate are 20% concentration and 0.2 m/s fluid velocity.

Thermally regulated cotton fabric coated with expanded graphite stabilized paraffin mixture as composite phase change material

PurposeThis study aims to manufacture cotton fabric with thermal regulation performance by using the composite phase change material (CPCM) prepared by coating paraffin doped with expanded graphite (EG), and the thermal effect of the fabric material was evaluated and characterized.Design/methodology/approachEG/paraffin CPCM with shape stability and enhanced thermal conductivity were prepared by the impregnation method and then finished on the surface of cotton fabric with coating technology. The microstructure, crystal structure, chemical composition, latent heat property and thermal conductivity were analyzed by scanning electron microscope, x-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimeter and thermal constant analyzer. The photo-thermal effect of the coated fabric was studied by a thermal infrared imager.FindingsCPCM prepared with a mass ratio of EG to paraffin of 1:8 showed excellent shape stability and low paraffin leakage rate. The latent heat of the CPCM was 51.6201 J/g and the thermal conductivity coefficient was increased by 11.4 times compared with the mixed paraffin. After the CPCM was coated on the surface of the cotton fabric, the light-to-heat conversion rate of the C-EG/PA3 sample was improved by 86.32% compared with the original fabric. In addition, the coated fabric showed excellent thermal stability and heat storage performance in the thermal cycling test.Research limitations/implicationsEG can improve the shape stability and thermal conductivity of paraffin but will reduce the latent heat energy.Practical implicationsThe method developed provided a simple and practical solution to improving the thermal regulation performance of fabrics.Originality/valueCombining paraffin wax with fabrics in a composite way is innovative and has certain applicability in improving the thermal properties of fabrics.

Application of Phase Change Materials (PCM) for Reducing Cabin Heat Load

<div class="section abstract"><div class="htmlview paragraph">In regions like Indian Subcontinent, Gulf or Saharan & Sub-Saharan Africa, where the sunshine is abundant almost all year round, air-conditioning is an important aspect of vehicles (passenger cars, buses etc.). Higher heat means higher cooling demand which in turn means bigger AC system. Like other auxiliaries, AC compressor is a parasitic load on the engine.</div><div class="htmlview paragraph">The best way to beat heat and reduce cabin heat load is to stop heat build-up itself. The present paper explores one such means of reducing cabin heat build-up by leveraging latent heat properties of phase change materials and thus improving the air condition performance. With the help of a case study this paper aims at detailing comprehensive effect of phase change material (PCM) and its application on the heat build-up inside the cabin of a vehicle, the air conditioning cooling performance, the time required to achieve comfort temperature, work of compression performed by AC compressor and COP.</div><div class="htmlview paragraph">In the case study described in this paper, AC performance evaluation has been carried out in a climatic chamber were severe ambient conditions (45°C DBT, 40% RH, 1200W/m2 solar load) are simulated. A series of trials a are carried out by using a combination of PCMs with a melting point of ~55°C and ~30°C and a reflective cover. In the most effective combination of the PCM and reflective cover, average cabin temperature at the end of soaking phase of 1 hour is reduced by as much as 27°C as compared to baseline. The assumed comfort temperature of 30°C is achieved just in 14 minutes which is 18 minutes faster compared to the baseline case.</div></div>

Experimental study on characteristics of a nano-enhanced phase change material slurry for low temperature solar energy collection

Phase change material (PCM) slurry with nanoparticles added has been proved to improve the performance of solar thermal storage. While, it is found that previous studies have not systematically dealt with the thermo-physical properties of PCM slurry (PCS) based on the type and mass fraction of nanoparticles and its stability and viscosity. Therefore, the purpose of this research is to experimentally evaluate the effects of nanoparticles and dispersants on the thermal-physical properties of PCS and determine the role and the associated optimal mass fraction ratio of dispersants in promoting the stability of suspension. The 30% mass fraction alkyl hydrocarbon PCS was employed for our study. Three types of nanoparticles (i.e., Cu, Al2O3 and TiO2) were selected for the study on performance improvement of PCS. Static and dynamic stability were measured by the static precipitation method and thermal cycle method. Thermo-physical properties including viscosity, thermal conductivity and latent heat were measured by a digital display rotary viscometer, a thermal conductivity measuring instrument and a differential scanning calorimeter, respectively. The experimental results revealed that the nanoparticles can improve the thermal properties of PCS, while the dispersants can improve the stability of the nano-enhanced PCS. The PCS with 0.1% TiO2 added had the best latent heat property and minimum viscosity. The 30% mass fraction PCS with 0.1% TiO2 and 0.1% SDBS added was the ideal choice for the application on low temperature solar energy collection.

Experimental Investigations Conducted for the Characteristic Study of OM29 Phase Change Material and Its Incorporation in Photovoltaic Panel

The solar photovoltaic (PV) system is emerging energetically in meeting the present energy demands. A rise in PV module temperature reduces the electrical efficiency, which fails to meet the expected energy demand. The main objective of this research was to study the nature of OM29, which is an organic phase change material (PCM) used for PV module cooling during the summer season. A heat transfer network was developed to minimize the experimental difficulties and represent the working model as an electrical resistance circuit. Most existing PV module temperature (TPV) reduction technology fails to achieve the effective heat transfer from the PV module to PCM because there is an intermediate layer between the PV module and PCM. In this proposed method, liquid PCM is filled directly on the back surface of the PV module to overcome the conduction barrier and PCM attains the thermal energy directly from the PV module. Further, the rear side of the PCM is enclosed by tin combined with aluminium to avoid any leakages during phase change. Experimental results show that the PV module temperature decreased by a maximum of 1.2 °C using OM29 until 08:30. However, after 09:00, the OM29 PCM was unable to lower the TPV because OM29 is not capable of maintaining the latent heat property for a longer time and total amount of the PCM experimented in this study was not sufficient to store the PV module generated thermal energy for an entire day. The inability of the presented PCM to lower the temperature of the PV panel was attributed to the lower melting point of OM29. PCM back sheet was incapable of dissipating the stored PCM’s thermal energy to the ambient, and this makes the experimented PCM unsuitable for the selected location during summer.

Numerical simulation analysis on the thermal performance of a building walls incorporating Phase Change Material (PCM) for thermal management

Phase Change Material (PCM) plays an essential role in a thermal energy storage device, mainly, by utilizing its relatively high storage density, and latent heat property. PCM is potentially applicable as buildings material as it is possible to incorporate in the building envelope for energy conservation. Energy Plus is the chosen software to simulate phase change material in the building envelope. This paper will discuss in detail the numerical analysis of building thermal characteristics using PCM materials on the walls for climatic conditions of Banda Aceh City. The PCM used is beeswax. The weather data used in the simulation was customized for the year 2015 from the National Renewable Energy Laboratory (NREL) website. Some separate parametric studies, i.e., a variation of PCM thermal conductivity, and temperature range, and results are presented. It was discovered that a PCM with a melting point from 21 to 23 °C led to maximum energy savings and greater peak load time shift, and is more suitable than other PCM temperature ranges for lightweight building construction.

PCMs for Residential Building Applications: A Short Review Focused on Disadvantages and Proposals for Future Development

Phase change materials (PCMs) offer great potential as a latent heat energy storage technique to provide energy efficient systems in new and existing residential buildings. Due to their unique characteristic of high storage densities and latent heat properties, PCMs provide opportunities for greater energy storage in many applications for residential buildings. These applications include, but are not limited to, solar water heating, space heating/cooling, and waste heat recovery. This study reviews PCM systems in residential building applications, with a focus on their major disadvantages and concludes with proposals for future development. Several disadvantages of PCM use in the given application have been identified and include; super cooling, low thermal conductivity, phase segregation, fire safety, and cost. The issues caused by super cooling and phase segregation lead to thermal cycling degradation, limiting the useful lifecycle of the material. These issues could limit their potential in building applications, which require systems of a long lifespan. Low thermal conductivities can slow down the rate at which heat is distributed or absorbed from the building, which affect the occupants comfort and as well as the efficiency of the system. Ideas based on the current research on ways to limit these disadvantages are included in the study. This study also identifies that further research is required on novel maintenance ways for the PCM systems after they have been installed.

Two-phase reservoir: development of a transient thermo-hydraulic model based on bond graph approach with experimental validation

ABSTRACTThe main purpose of the project FUI THERMOFLUID is to study the feasibility of a new electronic cooling system embedded on flying objects (missile, satellite, and airplane). The technology chosen consists of a pumped two-phase flow cooling loop (PTPFL). It is an innovative technology with a transport capacity of the thermal power up to 10 MW.m, exceeding in this way the performance of all other technologies. A PTPFL is a cooling loop based on the exploitation of the latent heat properties of the fluid trapped inside the loop, and moved by a pump. The components constituting a PTPFL are: a two-phase reservoir (TP-R), a mini-channels evaporator, a brazed plate condenser, a pump, and pipes. The global research work is devoted to propose a dynamic model and experimental validation of the PTPFL. The present article is exclusively dedicated to the TP-R. Indeed, this element plays a key role in the functioning of PTPFL. Historically, the TP-R did not equip the first cooling loop. However, due to its advantages, its introduction was essential. The developed dynamic model will be used in another work to predict the thermal hydraulic efficiency of the PTPFL from its mechanical and fluidic parameters, to conduct the study of transitional regimes and instability problems, and provides an original tool dedicated to design the TP-R in function of the thermal power levels to be evacuated and the selected refrigerant. The bond graph methodology is adopted for modelling works because of its energetic approach and multi-physics character of the studied system. The new model proposed in this article has many originalities: First, it is based on bond graph approach. Nowadays, the open literature shows that no bond graph model has been developed for such thermo-fluid system. Second, the dynamic model of TP-R pays great attention to phenomena that have never been taken into account in works cited in the present article, such as evaporation and condensation. Third, different conducto-convective heat exchanges are modelled without any experimental recalibration of the thermal exchange coefficients, unlike models proposed in the literature. In fact, all coefficients are systematically calculated using adequate correlations.