Experimental investigation on the hygrothermal behavior of a new multilayer building envelope integrating PCM with bio-based material

Wu, Dongxia; Rahim, M. Kaysar; Ganaoui, Mohammed El; Djedjig, Rabah; Bennacer, Rachid; Liu, Bin

doi:10.1016/j.buildenv.2021.107995

Cited by 40 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhu et al [16] developed a dynamic heat transfer model of PCM Trombe room and conducted a simulation that showed a 13.52% reduction in the annual total building load. Wu et al [17] proved the heat storage/release capacity of PCM is enhanced when it is placed closer to the outdoor side. This enhancement is closely related to the temperature distribution of PCM and its corresponding specific heat capacity.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance of Membrane Structures Integrated Phase Change Materials

Hu,

Chen,

Zhou

2023

XI Textile Composites and Inflatable Structures

View full text Add to dashboard Cite

The membrane structures, one of the typical large-span spatial structures, have been widely-used for sports stadiums and transportation hubs. However, the thermal performance of architectural membrane materials is not as good as those of the traditional building materials. The phase change material can absorb and release latent heat by changing its states within a very small range of temperature change, and thus reducing indoor temperature fluctuation and improving thermal comfort. In this paper, we proposed several membrane structural types to improve the thermal performance, including changing the single-layer membrane structure into two-layer, and setting air or phase change materials as the insulation layer in the middle. Temperature field simulations are performed based on COMSOL software to investigate the temperature variation and thermal performance of the membrane structures. The daily maximum temperature on the inner surface decreased by 2.1°C and 8.1°C respectively with air and PCM layer. We also discovered that the thermal insulation performance will be better when the latent heat value is higher and the PCM layer is placed nearer to the outdoor side. The temperature-stress coupling field showed the loss of pre-stress can be reduced by about 50% by adding PCM layer. The research results are believed to be significant for energy-saving and CO2 emission reduction in large public buildings.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal Performance of Membrane Structures Integrated Phase Change Materials

Hu,

Chen,

Zhou

2023

XI Textile Composites and Inflatable Structures

View full text Add to dashboard Cite

show abstract

“…In building construction, it is common to incorporate PCMs into building walls to enhance the heat storage performance of the envelope structure. By adding PCMs to the walls, the ability of the building to store and release heat effectively is improved, contributing to better thermal comfort and energy efficiency [13][14][15][16][17][18]. The investigation of the mechanical and thermal properties of concrete materials containing PCMs is a significant focus in the field of building energy conservation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical and Thermal Properties of Backfill Body with Paraffin Added

Zhang,

Han,

Liu

et al. 2023

Energies

View full text Add to dashboard Cite

Based on phase-change heat storage backfill, paraffin microcapsules were selected as the phase change material and were directly mixed with backfill materials for preparing backfill specimens. The mechanical and thermal properties of specimens with different paraffin percentages and slurry concentrations were tested and analyzed. The results show that compressive strength gradually decreases with an increasing paraffin percentage while it significantly increases with increasing slurry concentration, thermal conductivity decreases with increasing paraffin percentage and specific heat capacity increases with an increasing paraffin percentage and slurry concentration. For a paraffin percentage from 0% to 10%, compressive strength decreases by an average of 22.5%, thermal conductivity decreases by an average of 43.8% and specific heat capacity increases by an average of 8.7% at a phase-change temperature of 30 °C. For a slurry concentration from 68% to 72%, compressive strength increases by an average of 4.12 times, and specific heat capacity increases by an average of 3.5% at a phase-change temperature of 30 °C. The weakening effect of phase-change materials on compressive strength can be effectively improved by the increase of slurry concentration, and the increases of paraffin percentage and slurry concentration can both improve the sensible heat storage capacity of backfill materials.

show abstract

“…Evangelisti et al [ 19 ] investigated the thermal transmittance of three different building walls, from in situ measurements, using the UNI 10,351 standard to identify the most efficient retrofit solution. Li et al [ 20 ] and Wu et al [ 21 ] analyzed dynamic behavior from heat storage/release within the wall under dynamic solicitations. Chennouf et al [ 22 ] studied a cement mortar filled with date palm fibers exposed to repeated hygric cycles.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal Behavior of a Washing Fines–Hemp Wall under French and Tunisian Summer Climates: Experimental and Numerical Approach

et al. 2022

View full text Add to dashboard Cite

This study experimentally and numerically investigates the hygrothermal behavior of a wall made of washing fines hemp composite under typical French and Tunisian summer climates. Actually, insulating bio-based building materials are designed in order to reduce energy and non-renewable resources consumptions. Once their multiphysical properties are characterized at material scale, it is necessary to investigate their behavior at wall scale. Washing fines hemp composite shows low thermal conductivity and high moisture buffer ability. The test wall is implemented as separating wall of a bi-climatic device, which allows simulating indoor and outdoor climates. The numerical simulations are performed with WUFI Pro 6.5 Software. The results are analyzed from the temperature, relative humidity and vapor pressure kinetics and profiles and from heat and moisture transfer and storage. The thermal conductive resistance calculated at the end of the stabilization phase is consistent with the theoretical one. The hygric resistance is consistent for simulation up to steady state. The dynamic phase under daily cyclic variation shows that for such cycles two thirds of the thickness of the wall on the exterior side are active. It also highlights sorption-desorption phenomena in the wall.

show abstract

Experimental investigation on the hygrothermal behavior of a new multilayer building envelope integrating PCM with bio-based material

Cited by 40 publications

References 48 publications

Thermal Performance of Membrane Structures Integrated Phase Change Materials

Thermal Performance of Membrane Structures Integrated Phase Change Materials

Experimental Study on Mechanical and Thermal Properties of Backfill Body with Paraffin Added

Hygrothermal Behavior of a Washing Fines–Hemp Wall under French and Tunisian Summer Climates: Experimental and Numerical Approach

Contact Info

Product

Resources

About