Angel Serrano

Angel Serrano
CIC Energigune · Thermal Energy Storage (TES)

PhD

About

25
Publications
3,206
Reads
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230
Citations
Additional affiliations
November 2018 - present
CIC Energigune
Position
  • PostDoc Position
October 2014 - November 2018
University of Castilla-La Mancha
Position
  • PhD Student

Publications

Publications (25)
Preprint
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
Six lignin-based polyols (LBPs) have been prepared by cationic ring opening polymerization of an oxirane in the presence of an organosolv lignin in tetra-hydrofuran (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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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 •...
Article
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...
Article
Full-text available
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...
Article
Full-text available
In this paper, the system Li 2 SO 4-Na 2 SO 4 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 produc...
Article
Full-text available
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...
Article
Full-text available
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...
Article
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...
Article
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...
Article
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...
Article
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...
Article
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...
Conference Paper
Full-text available
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...
Article
Full-text available
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...
Article
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...
Article
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�...
Article
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...
Article
Full-text available
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...

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Projects

Projects (2)
Project
The NRG-STORAGE project will launch a novel breakthrough solution that replaces the currently available insulation materials used in building envelopes, by proposing a multi-functional and eNeRGy saving cementitious Foam (NRG-Foam). The heat-activated foam will be used for passive/active management of energy transfer and will be applied to new building envelopes and to retrofit existing ones. Graphene-based nano-additives will be doped in both cementitious foam matrix and bio-based PCM fraction for improving the thermal storage capacity, volume stability and mechanical properties of the resulting composite. Two active/passive systems will be prototyped and validated. First, an implicit heating system for thermal activation of the added nano-graphene will be installed representing a material-based approach, and, second, a multi-functional energy efficient façade system (MeeFS) will be installed, to diverse and direct the thermal absorption capacity and shadowing of the external building walls for optimizing the NRG-Foam’s. NRG-Foam composites will be optimized to achieve the best compromise between thermal insulating properties (air bubbles) and heat storage capacity (bio-PCMs). A highly conductive cementitious paste will be designed and produced, targeting on an increase in thermal conductivity (once activated up to 10 times for bio-PCM, and 2 times for cement matrix), and an enhanced efficiency of bio-PCM heat storing performance (> 5 times). With this project, the partners will develop an innovative functional material that combines high insulation capabilities (more than 25% of classical layers) and high energy-storage capacity (more than 10% of improvement in active applications). Furthermore, the NRG-Foam layer will be characterized by a high water and air tightness (between 10% and 25% higher than existing solutions) and at least 15% lower costs than the actual solutions available in Europe for insulation purposes of non-residential buildings. https://cordis.europa.eu/project/id/870114 Project information NRG-STORAGE Grant agreement ID: 870114 Start date: 1 April 2020 End date: 31 March 2024 Funded under: H2020-EU.2.1.5.2. Overall budget: € 6 846 750 EU contribution: € 5 602 934,26 Coordinated by: TECHNISCHE UNIVERSITAT DARMSTADT Germany Participants (12) Sort alphabetically NETZSCH GERATEBAU GMBH Germany AGENCIA ESTATAL CONSEJO SUPERIOR DEINVESTIGACIONES CIENTIFICAS Spain WILHELM ROSER SOHNE GMBH CO. KG Germany GBS INZHENERING Bulgaria FUNDACION TECNALIA RESEARCH & INNOVATION Spain TECHNISCHE UNIVERSITEIT DELFT Netherlands CENTRO DE INVESTIGACION COOPERATIVA DE ENERGIAS ALTERNATIVAS FUNDACION, CIC ENERGIGUNE FUNDAZIOA Spain POLITECHNIKA SLASKA Poland GRAPHENEA SA Spain CERVENKA CONSULTING SRO Czechia SPHERA ENCAPSULATION SRL Italy UNIVERSIDAD NACIONAL DEL LITORAL Argentina