Validation of different numerical models with benchmark experiments for modelling microencapsulated-PCM-based applications for buildings

Soares, N.; Rosa, N.; Costa, J.J.; Lopes, António Gameiro; Matias, Telma; Simões, Pedro; Durães, Luísa

doi:10.1016/j.ijthermalsci.2020.106565

Cited by 42 publications

(8 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uniform temperatures for all the surfaces of the simulation model are adopted. The detailed process can be referred from Soares et al 31 Fig. 7 shows the simulation results of the temperature and liquid fraction contours at the temperatures of 20 °C, 68 °C, and 90 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Experimental study of the thermal storage and mechanical properties of microencapsulated phase change composites during a supersonic cruise

Zhang

Wang

Jin³

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental study of the thermal storage and mechanical properties of microencapsulated phase change composites during a supersonic cruise

Zhang

Wang

Jin³

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…The present model was based on the modified specific heat method, in which paraffin is essentially treated as a liquid. In this method, in the energy conservation equation, latent heat is modeled as an inflated specific heat within the temperature interval where phase-change occurs . Moreover, to account for the solid phase, a modified viscosity is used to force the molten paraffin to behave as a solid when the temperature is below its melting temperature …”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…In this method, in the energy conservation equation, latent heat is modeled as an inflated specific heat within the temperature interval where phase-change occurs. 31 Moreover, to account for the solid phase, a modified viscosity is used to force the molten paraffin to behave as a solid when the temperature is below its melting temperature. 32 A 2D axisymmetric geometry was chosen.…”

Section: D Cfd Model Of Pcm Crystallization On Coldmentioning

confidence: 99%

In Situ Thermal Conductivity of a Paraffinic Phase Change Material in a Cold Finger Configuration

Costa,

Pantoja,

Mota

et al. 2023

Crystal Growth & Design

View full text Add to dashboard Cite

Phase change materials (PCMs) such as paraffins are widely applied to store thermal energy. PCMs displaying high thermal conductivities are desirable because they crystallize or melt rapidly when the temperature in the environment changes, absorbing or releasing latent heat accordingly. In this work, we experimentally determined the thermal conductivity of PCM layers in situ. To this end, layers that mimic macro-encapsulated PCM devices have been grown in a cold finger experimental setup. The thermal conductivity was determined as the adjustable parameter of a detailed 1D mathematical model for the process of phase change. It has been shown that the thermal conductivity of paraffin increases by as much as 40% to a value of 0.30 W m −1 K −1 when the rate of crystal growth increases from 0.06 to 0.19 kg m −2 s −1 . Furthermore, evidence shows that paraffinic rotator phases cause an increase in the thermal conductivity during the crystallization of the PCM. With the aid of a 2D computational fluid dynamics mathematical model, it has been shown that the heat transfer by natural convection in the molten paraffin was responsible for the noncylindrical shape of the paraffin layer. It is concluded that the crystallization rate should be considered for designing PCM devices with a faster thermal response.

show abstract

“…The selected method of using PCM in this study is to combine the PCM with the plasterboards, which is a common method for this purpose. [20][21][22] The use of PCM in the plasterboard could be imbibing of liquid PCM into the pore space of the plasterboard, by adding PCM in the wet stage of the plasterboard, or the use of micro-encapsulated PCM in the plasterboards, as shown in Figure 3. 23…”

Section: Phase Change Materialsmentioning

confidence: 99%

Impacts of phase change materials on performance of operational peak load shifting strategies in a sample building in hot‐arid climate

Mohkam

Mohammadi

Arababadia

et al. 2022

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Buildings consume around 32% of the produced energy, worldwide and around 19% of the greenhouse gas emissions are related to them. It makes the buildings one of the largest energy consumers and one of the major sources of greenhouse gases emission.HVAC systems are one of the largest consumers of energy in buildings. In hot arid climates, cooling systems used in buildings impose a large pressure on the power grid, which may lead into blackouts. In order to address this problem, several approaches have been examined. Thermal energy storage, in particular, latent heat storage using phase change materials (PCM) has been notably considered in construction applica-

show abstract

Validation of different numerical models with benchmark experiments for modelling microencapsulated-PCM-based applications for buildings

Cited by 42 publications

References 65 publications

Experimental study of the thermal storage and mechanical properties of microencapsulated phase change composites during a supersonic cruise

Experimental study of the thermal storage and mechanical properties of microencapsulated phase change composites during a supersonic cruise

In Situ Thermal Conductivity of a Paraffinic Phase Change Material in a Cold Finger Configuration

Impacts of phase change materials on performance of operational peak load shifting strategies in a sample building in hot‐arid climate

Contact Info

Product

Resources

About