Angel Serrano

• PhD
• Senior Researcher at CIC Energigune

A hybrid BTMS composed of ssPCMs and liquid cooling is optimized. • WLTP3 drive cycle used instead of constant rates are used to size PCM thickness. • Hexagonal cell arrangement ensures minimum space use in battery packs. • Optimal properties: Cp eff~8 5 kJ/(kg⋅K) and k eff~8 W/(m⋅K) with 20 wt% additive. • SsPCM holder absorbs 27 % of battery heat...

Addition of different types of phase change materials (PCMs) to cement-based materials for thermal energy storage has been broadly investigated in the literature. Many studies have researched the addition of organic PCMs and the thermal performance of the PCM-cement system. However, drawbacks such as leakage and poor thermal conductivity of the PCM...

The manufacture of fibers with thermoregulatory properties is generating increasing interest, given the ease with which these materials can be adapted to different geometries and applications such as the production of thermoregulating textiles, flexible sensors and human health care. In this sense, the encapsulation of phase change materials (PCMs)...

Citation: Taeño, M.; Adnan, A.; Luengo, C.; Serrano, Á.; Dauvergne, J.-L.; Crocomo, P.; Huerta, A.; Doppiu, S.; Palomo del Barrio, E. Improved Thermophysical and Mechanical Properties in LiNaSO 4 Composites for Thermal Energy Storage. Nanomaterials 2024, 14, 78. Abstract: Solid-solid phase-change materials have great potential for developing compac...

The widespread deployment of renewable energies such as solar and wind implies the parallel development of energy storage systems to deal with their intermittency. Storing renewable energy as thermal energy is one of the alternatives under constant research. In this regard, phase change materials (PCMs) are able to store large amounts of energy at...

Thermal management protects against external agents and increases the lifetime and performance of the devices in which it is implemented. Because of their ability to store and release a high amount of energy at a nearly constant temperature, phase change materials (PCMs) are promising thermoregulatory materials. Thus, the manufacture of PVDF fibers...

Energy demand for heating and cooling represents a large part of building´s (residential and non-residential) energy consumption around the world. Development of thermal insulating construction elements with thermal energy storage and release capacity could be one way of reducing this consumption while maintaining thermal comfort inside the buildin...

High-temperature molten salt systems are employed in a wide variety of industrial applications, linked to energy production and storage, such as concentrated solar power, waste heat recovery, storage plants, fuel cells nuclear, etc. The reactivity of these salts is one of the main issues to address for the employment of affordable steels as constru...

Pool boiling of liquid water has many practical applications in daily life and industry, including steam accumulators. Thus, pool boiling on polymeric surface coatings with nanoporous microparticle addition for boiling heat transfer coefficient (HTC) enhancement and potential for solid-solid phase change material (PCM) encapsulation have been studi...

The present work addresses the lack of reported information about the mechanical properties of solid-solid PCMs, and how these are affected by their processing, considering that they usually incorporate fillers to increase their thermal conductivity. To this end, this work analyzes pentaglycerine (PG) based composites, which are of great interest i...

In the last two decades, microfluidics has emerged as a powerful tool of high precision and versatility, mainly applied to biomedicine. As a result of its strengths, the literature concerning its fundamental principles is comprehensive. Since this field continues to evolve, new areas, such as the production of solid microcapsules, need to be covere...

It is widely agreed that phase change materials (PCMs) are of high interest for sustainable energy future. Many of the applications require anti-leakage properties of PCM, that can be accomplished through PCM encapsulation. In this study, scalable and considerably simplified approach based on the microfluidics principles was successfully designed f...

The synthesis of rigid polyurethane (RPU) foams containing thermoregulatory microcapsules has been carried out under reduced pressure conditions with a new foaming formulation to reduce the final composite densities. These optimized RPU foams were able to overpass the drawbacks exhibited by the previous composites over the studied temperature range...

Six lignin‐based polyols (LBPs) have been prepared by cationic ring opening polymerization of an oxirane in the presence of an organosolv lignin in tetrahydrofuran (THF) as reaction media and co‐monomer. The prepared LBPs have been characterized and tested for the first time as phase change materials (PCMs) for thermal energy storage (TES) at low t...

Polyurethane (PU) is one of the principal polymers in the global plastic market thanks to its versatility and continuous improvement. In this work, PU elastomeric materials having thermoregulating properties through the incorporation of microcapsules (mSD-(LDPE·EVA-RT27)) from low-density polyethylene and vinyl acetate containing paraffin®RT27 as P...

Peritectic compound Li4(OH)3Br has been recently proposed as phase change material (PCM) for thermal energy storage (TES) applications at approx. 300 °C Compared to competitor PCM materials (e.g., sodium nitrate), the main assets of this compound are high volumetric latent heat storage capacity (>140 kWh/m3) and very low volume changes (<3%) during...

A novel form-stable phase-change material (PCM) based on facing bricks was developed by incorporating thermoregulating PEG-SiO2, synthetized by sol-gel method and based on polyethylene glycol as phase-change material and silica as stabilizer compound. The PEG-SiO2 in its liquid form (sol) is firstly adsorbed inside the porous brick and lastly stabi...

Thermoregulating microcapsules (MC) with flame-retardant properties were used to produce polyurethane (PU) foams. Thermogravimetric analyses of the microcapsules performed under atmospheric air and nitrogen confirmed that the hexa(methacryloylethylenedioxy) cyclotriphosphazene (PNC-HEMA) monomer raised the amount of residue after exposure to high t...

Pentaerythritol (PE), pentaglycerine (PG), and neopentylglycol (NPG) are non-ionic plastic crystal with high potential for latent heat thermal energy storage (TES) in solar heating applications. These molecules undergo reversible solid phase transitions with unusually large enthalpy of transition (110 J/g-300 J/g) in the temperature range from 44 •...

This paper presents a method for fast estimation of the enthalpy-temperature function of Phase Change Materials (PCMs). The method combines a simple experimental setup with a non-iterative, reliable mathematical algorithm that allows retrieving the enthalpy-temperature function from measurements of heat flux and temperature at a single point. Disti...

Neopentylglycol (NPG) and tris(hydroxymethyl)aminomethane (TRIS) are promising phase change materials (PCMs) for thermal energy storage (TES) applications. These molecules undergo reversible solid-solid phase transitions that are characterized by high enthalpy changes. This work investigates the NPG-TRIS binary system as a way to extend the use of...

In this paper, the system Li2SO4–Na2SO4 is proposed as a candidate material for thermal energy storage applications at high temperatures (450–550 °C). Depending on the composition, the thermal energy can be stored by using a eutectoid reaction and solid–solid phase transition. In these types of systems, all the components (reagent and products) are...

The present work explores the feasibility of using polyalcohols with solid-solid phase transition as active supporting matrix of n-alkanes in shape-stabilized phase change materials (SSPCMs). It is well-established that the use of SSPCM avoids leakage and increases stability and easy handling of solid-liquid PCMs. Nevertheless, the resulting compos...

Aminophosphonated polyols with flame retardant properties are synthesized by ring opening polymerization using diethyl‐N,N‐bis(2‐hydroxyethyl) aminomethyl phosphonate (Fyrol‐6) as initiator. The influence of the catalyst type and its concentration on the polymerization rate are studied. The catalyst system formed by potassium methoxide (MeOK) in DM...

An in situ shape-stabilized phase change material (ssPCM) from polyethylene glycol (PEG) has been produced by sol–gel method. The inorganic matrix was in situ formed from tetraethyl orthosilicate (TEOS), controlling the condensation rate in a second alkaline step using NaOH. ssPCMs having a latent heat up to 113.8 J/g were synthetized using a sol w...

Hydrophobic release agents were developed from SiO2-CH3 submicron-sized particles containing hydrophilic and hydrophobic functional groups dispersed into a vegetable oil as support. The SiO2-CH3 submicron-sized particles were synthesized by changing the molar ratio between the precursors Tetraethyl orthosilicate (TEOS) and Methyltriethoxysilane (MT...

Polyether polyols with flame‐retardant properties are synthesized using glycerol phosphate disodium salt as an initiator and dimethyl sulfoxide (DMSO) as a solvent. The molecular weight of the polyol decreased when higher solvent to initiator ratios were used, revealing that a larger amount of salt was activated. In addition, the larger the amount...

Rigid PU foams are properly recycled by a single-phase glycolysis process employing crude glycerol as transesterification agent. A high pure recovered polyol (71% of purity) was obtained using a mass ratio of PU scraps to crude glycerol of 1 to 1, a reaction temperature of 190 °C and stannous octoate as catalyst in a 1.3 wt% concentration. PU foam...

This manuscript shows how a commercial process simulation software such as Aspen–Hysys can be implemented to enhance the learning experience of Chemical Engineering students in Fluid Mechanics. To this end, a 15 hr practical computer lab is taught as a complement to the Fluid Mechanics lecturer classes at the end of the semester which allow to summ...

The addition of a new shape-stabilized phase change material (ssPCM) in ceramic elements having large porosity has been carried out. In that way, a novel form-stable PCM based on bricks was developed. In order to study the incorporation of the thermoregulatory material in the composites, bricks with different porosities have been manufactured. In t...

Thermoregulating microcapsules containing phase change material (Rubitherm®RT27) was produced by using the suspension-like polymerization technique with styrene (St), divinylbenzene (DVB) and hexa(methacryloylethylenedioxy) cyclotriphosphazene (PNC-HEMA) as co-monomers. The effect of PNC-HEMA for improving the flame retardant properties of the micr...

Rigid polyurethane foams with up to 50 wt% of microcapsules from LDPE-EVA containing Rubitherm®RT27 were synthesized. The influence of microcapsules on the foams density, microstructure and mechanical resistance was studied. Cell size and strut and wall thicknesses were analyzed by SEM. The relationships between densities and foam microstructures w...

The reduction of the heat loss by incorporating microcapsules into rigid polyurethane (RPU) foams was studied. This way, composite foams containing between 0% and 50% by weight of microcapsules were synthesized. Microcapsules named as mSD-(LDPEEVA-RT27) from low density polyethylene (LDPE) and ethylvinylacetate (EVA) copolymer containing Rubitherm�...

A strategy for synthesis and functionalisation of polyurethanes was described. Polyols bearing terminal groups were prepared by anionic ring-opening copolymerisation between propylene oxide and epoxy dimethylphosphonate (POPh). The direct insertion of POPh improves the flammability of PUs. Therefore, the structure, properties and flame retardant pr...

A new thermoregulating material containing the commercial paraffin Rubitherm®RT27 stabilized by SiO2 with a polymeric shell from polystyrene–divinylbenzene (Polymeric-SiO2-PCMs) was incorporated into gypsum up to a 15 mass ratio respect to the initial hemihydrate in order to develop building materials with a high thermal energy store (TES) capacity...