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Phase change

Numerical computation of solar heat storage in phase change material/concrete wall

Numerical computation of solar heat storage in phase change material/concrete wall

... A one-dimensional mathematical model was developed in order to analyze and optimize the latent heat storage wall. Two layers of phase change material (PCM) are sandwiched within a concrete wall. The ...

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Experimental investigations on the cooling of a motorcycle helmet with phase change material (PCM)

Experimental investigations on the cooling of a motorcycle helmet with phase change material (PCM)

... The study involved testing a helmet installed with a simple phase change material storage unit (PCMSU) in a wind tunnel. In this work, a half face standard size motorcycle helmet was studied. A black helmet ...

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Superhydrophobic Copper Foam Supported Phase Change Composites with High Thermal Conductivity for Energy Storage

Superhydrophobic Copper Foam Supported Phase Change Composites with High Thermal Conductivity for Energy Storage

... the phase change latent heat and phase change temperature of the as-prepared ...The phase change latent heat of the shape-stabilized PCMs is calculated by the area under the ...

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Melting of a phase change material in a horizontal annulus with discrete heat sources

Melting of a phase change material in a horizontal annulus with discrete heat sources

... Phase change materials have found many industrial applications such as cooling of electronic devices and thermal energy ...a phase change material in a 2-D horizontal annulus with different ...

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Dynamic thermal behavior of building using phase change materials for latent heat storage

Dynamic thermal behavior of building using phase change materials for latent heat storage

... A important average attenuation between the outdoor spaces and room temperature amplitudes is approximately 8 K (with PCM) and 6.8 K (with empty cavity) in first floor spaces and 9.5 K (with PCM) and 9 K (with empty ...

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Experimental Analysis on Forced Draft Solar Dryer with Phase Change Material

Experimental Analysis on Forced Draft Solar Dryer with Phase Change Material

... resistance to the flow of heat increases during the heat extraction process. Fig. 5.3 shows the temperature profile on the day. The experiment was performed to determine the maximum temperature of PCM when it was filled ...

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Thermal energy storage system using phase change materials: Constant heat source

Thermal energy storage system using phase change materials: Constant heat source

... Figures 7 and 8 relate the charging time with PCM temperature and HTF temperature in TES tank at x/L = 0.25, 0.5, 0.75, and 1.0 when mass flow rate of 6 l/min., maintained at HTF inlet temperature of 70 °C, with paraffin ...

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PHASE CHANGE MODELLING FOR NON-ISOTHERMAL FLOWS: A MATHEMATICAL, NUMERICAL AND COMPUTATIONAL MODEL FOR PURE SUBSTANCES

PHASE CHANGE MODELLING FOR NON-ISOTHERMAL FLOWS: A MATHEMATICAL, NUMERICAL AND COMPUTATIONAL MODEL FOR PURE SUBSTANCES

... of phase change phenomenon, the Computational Fluid Dynamic (CFD) has become a pro- gressively important tool to solve complex flows for a variety of engineering applications (TRYG- GVASON; SCARDOVELLI; ...

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A SOLUTION FOR A PHASE CHANGE TRANSIENT HEAT TRANSFER PROBLEM USING AN ELECTRONIC SPREADSHEET

A SOLUTION FOR A PHASE CHANGE TRANSIENT HEAT TRANSFER PROBLEM USING AN ELECTRONIC SPREADSHEET

... complex phase change transient heat transfer problem is solved by coupling the spreadsheet iteration facility with the time increase required by the problem’s ...

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DECONVOLUTION OF SEISMIC DATA USING PHASE CHANGE OPERATORS

DECONVOLUTION OF SEISMIC DATA USING PHASE CHANGE OPERATORS

... Wavelet deconvolution aims to compress wavelet shape in order to recover reflectivity function or impulse response of the medium. In most cases, the wavelet is not known and is avail- able only as an estimate of its ...

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Conductive bridging RAM devices inspired on solid- state biopolymer electrolytes

Conductive bridging RAM devices inspired on solid- state biopolymer electrolytes

... resistivity change of a given ...instance, phase change memory (PCM)[22][23] is characterized by the switching of the insulating material from a crystalline more conductive phase (on state), ...

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Thermal control ways for Li-Ion batteries cooling: A review / Caminhos de controle térmico para baterias de Li-Ion cooling: Uma avaliação

Thermal control ways for Li-Ion batteries cooling: A review / Caminhos de controle térmico para baterias de Li-Ion cooling: Uma avaliação

... Thermal management system is a relevant aspect for Li-ion batteries, mainly for electric vehicles. For this reason, several cooling methods have been proposed along the years, considering effect of both thermal ...

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Passive solar system applied in trombe walls Débora Ferreira

Passive solar system applied in trombe walls Débora Ferreira

... A phase-change material (PCM) is a substance with a high heat of fusion, with the capability of melting and solidifying at a certain temperature, and is capable of storing and releasing large (certain) ...

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UNIVERSIDADE DO VALE DO RIO DOS SINOS UNIDADE ACADÊMICA DE PÓS-GRADUAÇÃO E PESQUISA PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÃNICA ESTUDO NUMÉRICO DO PROCESSO DE MUDANÇA DE FASE DE PCM EM CAVIDADES ESFÉRICAS

UNIVERSIDADE DO VALE DO RIO DOS SINOS UNIDADE ACADÊMICA DE PÓS-GRADUAÇÃO E PESQUISA PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÃNICA ESTUDO NUMÉRICO DO PROCESSO DE MUDANÇA DE FASE DE PCM EM CAVIDADES ESFÉRICAS

... Materiais utilizados em armazenamento térmico com mudança de fase são chamados de PCM, abreviatura de Phase Change Materials. À medida que o PCM recebe ou cede calor, este passa da fase sólida para a fase ...

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Organic Rankine Cycle with Solar Heat Storage in Paraffin Way

Organic Rankine Cycle with Solar Heat Storage in Paraffin Way

... the phase change material A phase change material is a substance with a high latent heat, which through melting and solidifying, at a certain temperature, is able to store and release large ...

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Coupled cellular automata for frozen soil processes

Coupled cellular automata for frozen soil processes

... where all subscripts have the same meaning as introduced so far, z is the cell elevation and k represents the average hy- draulic conductivity of the region between the ith and the ζ th cells. In this study, phase ...

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Braz. J. Phys.  vol.34 número1

Braz. J. Phys. vol.34 número1

... discontinuous phase change for a special energy condition, from a mean-field calculation, which he suggested to be analogous to a change of association num- ber from one liquid phase to ...

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Características térmicas de materiais de mudança de fase adequados para edificações brasileiras.

Características térmicas de materiais de mudança de fase adequados para edificações brasileiras.

... ateriais de mudança de fase – Phase Change Materials (PCMs) apresentam uma capacidade de armazenamento térmico substancialmente maior que os materiais convencionais. PCMs aplicados na envoltória de ...

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SINGLE-PHASE AND TWO-PHASE SECONDARY COOLANTS: SIMULATION AND EVALUATION OF THEIR THERMOPHYSICAL PROPERTIES

SINGLE-PHASE AND TWO-PHASE SECONDARY COOLANTS: SIMULATION AND EVALUATION OF THEIR THERMOPHYSICAL PROPERTIES

... One of the alternatives for cold storage is the production of ice in tanks. Its high thermal energy density and elevated heat of fusion make ice an effective material for storing thermal energy, reducing storage volume ...

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Densification and volumetric change during supersolidus liquid phase sintering of prealloyed brass Cu28Zn powder: Modeling and optimization

Densification and volumetric change during supersolidus liquid phase sintering of prealloyed brass Cu28Zn powder: Modeling and optimization

... In this research, the SLPS variables were mathematically related to the empirically obtained response functions (sintered density, densification parameter, porosity percentage, and volumetric change percentage). A ...

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