Multiobjective optimization of a building envelope with the use of phase change materials (PCMs) in Mediterranean climates

Konstantinidou, Christina; Lang, Werner; Papadopoulos, Agis M.

doi:10.1002/er.3969

Cited by 32 publications

(37 citation statements)

References 40 publications

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“…1 As promising energy storage materials, phase-change materials (PCMs) have been a deep concern of academic circles in recent years. [5][6][7] PCMs could be classified as organic and inorganic PCMs. [5][6][7] PCMs could be classified as organic and inorganic PCMs.…”

Section: Introductionmentioning

confidence: 99%

Facile functionalized mesoporous silica using biomimetic method as new matrix for preparation of shape‐stabilized phase‐change material with improved enthalpy

et al. 2019

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Summary Dopamine‐functionalized mesoporous silica (DPMS), which was prepared by using a facile, easy to operate, and environmentally friendly biomimetic method, was synthesized as a new supporter of polyethylene glycol (PEG) to prepare shape‐stabilized phase‐change material (ss‐PCM) of PEG/DPMS with improved enthalpy. The thermal properties of PEG/DPMS were investigated, and the study results demonstrated that dopamine functionalization could regulate the crystallization property of PEG molecules immobilized in PEG/DPMS, and then the enthalpy of PEG/DPMS could be improved effectively. Compared with the ss‐PCM of PEG/SBA‐15 that was synthesized by using unfunctionalized silica molecular sieve (SBA‐15) as the matrix, after dopamine modification, the fusion and solidification enthalpies of 70‐wt% PEG/DPMS increased from 47.25 and 34.96 J/g to 69.77 and 67.54 J/g, respectively. The interaction mechanism study results suggested that the amino groups in the molecule of poly‐dopamines on the surface of DPMS could interact with the oxygen atoms in the molecules of PEG to form hydrogen bonds. Additionally, the PEG/DPMS had favorable thermal reliability and prominent thermal stability. Hence, the DPMS could be applied as a promising supporter for the fabrication of ss‐PCM.

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Section: Introductionmentioning

confidence: 99%

Facile functionalized mesoporous silica using biomimetic method as new matrix for preparation of shape‐stabilized phase‐change material with improved enthalpy

et al. 2019

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“…For example, the underwater glider, in which energy storage materials that could storage heat energy temporarily are used as cold and heat source of TEGs, presents a low generation efficiency of 0.1%; this requires more than 5000 TEGs if the glider requires 6 kJ of energy per diving cycle, which leads to very high production costs . Phase change materials (PCMs) are used to store and release thermal energy via their latent heat in many application areas, such as buildings and in space applications . In recent years, PCMs have also been used to drive mechanical parts such as microvalves and hydraulic accumulators due to their high pressure bearing capacity and considerable volume change rate .…”

Section: Introductionmentioning

confidence: 99%

Maximum efficiency point tracking for an ocean thermal energy harvesting system

et al. 2020

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Summary Limited energy is the most critical factor that restricts the persistent presence of underwater vehicles in the oceans; thus, harvesting the ocean's thermal energy that is stored in the water column between the sea surface and deep water is a particularly promising solution for the current power shortage. This paper has designed a new ocean thermal energy conversion system which using phase change material as energy storage medium, and proposed a novel maximum efficiency point tracking (MEPT) method for energy conversion. This new method, which is integrated with a radial basis function neural network (RBFNN), particle swarm optimization (PSO) and the proportion integration differentiation (PID) control method, could effectively improve the efficiency of energy conversion. Compared with the power generation system that does not use the MEPT method, experimental results show that the proposed method can improve the efficiency of the power generation from less than 19.05% to more than 34.3% and has higher stability (using this method: the efficiency changes from 34.3%‐34.7%; without using this method: the efficiency changes from 13.56% ‐19.05%) when the load changes. This novel method can be used in many conditions, especially when the mathematical model of the generation system is unknown or researchers want to use fewer sensors for maximum efficiency point tracking.

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“…1 A proper PCM for building applications should meet a number of criteria related to the desired thermophysical, kinetic, and chemical properties as well as economics. Therefore, this is an effective way to use solar energy and improve energy efficiency of buildings.…”

Section: Introductionmentioning

confidence: 99%

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

et al. 2019

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Summary The discovery of new eutectic phase change materials (PCMs) will overcome the current PCM challenges such as nonbiodegradability, super‐cooling, and limited thermal stability. This paper reports on the development of new bio‐based PCMs composed of binary mixtures of fatty acid esters and fatty alcohols at their eutectic compositions, which provide potential solid‐liquid PCMs for building applications. Six binary systems, namely 1‐dodecanol (DD) + methyl stearate (MES), DD + methyl palmitate (MEP), DD + methyl laurate (MEL), 1‐tetradecanol (TD) + MES, TD + MEP, and TD + MEL were prepared and their thermal behaviours were deliberated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), long‐term thermal stability test, and mass loss analysis. Amongst the studied systems, phase change transition temperature and latent heat of fusion of the eutectic mixtures of DD‐MES, DD‐MEP, TD‐MES, and TD‐MEP were found to be suitable for the building application with values of 22.46°C/201.91 J/g, 20.34°C/224.45 J/g, 32.05°C/209.38 J/g, and 26.72°C/210.15 J/g, respectively. The average degree of super‐cooling for all PCMs was below 2°C, and no significant changes in thermophysical properties of the developed PCMs were observed after 1000 thermal cycles.

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Multiobjective optimization of a building envelope with the use of phase change materials (PCMs) in Mediterranean climates

Cited by 32 publications

References 40 publications

Facile functionalized mesoporous silica using biomimetic method as new matrix for preparation of shape‐stabilized phase‐change material with improved enthalpy

Facile functionalized mesoporous silica using biomimetic method as new matrix for preparation of shape‐stabilized phase‐change material with improved enthalpy

Maximum efficiency point tracking for an ocean thermal energy harvesting system

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

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