Operation assessment of an air-PCM unit for summer thermal comfort in a naturally ventilated building

Rosario, Maria De Los Ángeles Ortega Del; Austin, Miguel Chen; Bruneau, Denis; Nadeau, Jean-Pierre; Sébastian, Patrick; Jaupard, Dimitri

doi:10.1080/00038628.2020.1794782

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…Once the PCM is completely solidified, the LHTES system is ready for a new cycle. Most previously developed LHTES systems [5][6][7] are based on paraffin waxes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fatty Acids as Biobased Organic Materials for Latent Heat Storage

et al. 2021

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This work aims to characterize phase change materials (PCM) for thermal energy storage in buildings (thermal comfort). Fatty acids, biobased organic PCM, are attractive candidates for integration into active or passive storage systems for targeted application. Three pure fatty acids (capric, myristic and palmitic acids) and two eutectic mixtures (capric-myristic and capric-palmitic acids) are studied in this paper. Although the main storage properties of pure fatty acids have already been investigated and reported in the literature, the information available on the eutectic mixtures is very limited (only melting temperature and enthalpy). This paper presents a complete experimental characterization of these pure and mixed fatty acids, including measurements of their main thermophysical properties (melting temperature and enthalpy, specific heats and densities in solid and liquid states, thermal conductivity, thermal diffusivity as well as viscosity) and the properties of interest regarding the system integrating the PCM (energy density, volume expansion). The storage performances of the studied mixtures are also compared to those of most commonly used PCM (salt hydrates and paraffins).

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“…Once the PCM is completely solidified, the LHTES system is ready for a new cycle. Most previously developed LHTES systems [5][6][7] are based on paraffin waxes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fatty Acids as Biobased Organic Materials for Latent Heat Storage

et al. 2021

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“…(Socaciu et al, 2016). It is an emergent research area, attracting scholars to testing new types of PCM to reach optimal thermal comfort conditions by incorporating them into building envelopes (Evola, Marletta and Sicurella, 2013b;Sage-Lauck and Sailor, 2014;Jamil et al, 2016b;Nghana and Tariku, 2016;Figueiredo et al, 2017b;Afolabi et al, 2019;Ahangari and Maerefat, 2019;Alizadeh and Sadrameli, 2019;Nada, Alshaer and Saleh, 2019;Bagheri-Esfeh, Safikhani and Motahar, 2020;Kerroumi, Touati and Virgone, 2020;Ye, Wang and Qian, 2020;Yun et al, 2020;Al-Absi et al, 2021;Ortega Del Rosario et al, 2021;Y. Qu et al, 2021b;Zhu et al, 2021).…”

Section: Phase Change Materials (Pcm)mentioning

confidence: 99%

Thermal Comfort in Buildings: Scientometric Analysis and Systematic Review

et al. 2023

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The building sector is one of the most resource-exhausting areas in global energy consumption. Maintaining good thermal comfort for occupants is the leading energy demand in buildings. The primary purpose of the current study is to identify the development of research areas on occupant comfort, pinpoint the gaps in knowledge and recommend directions for future studies. A scientometric analysis and a comprehensive systematic literature review are conducted using 792 sources. It is evident from the exponential increase in published papers that scholars are highly interested in this research topic. However, discrepancies remain between the two fundamental models of evaluating thermal comfort. There is a pressing need to balance thermal comfort while increasing energy efficiency. The foundation of achieving this balance can only be done by correctly evaluating the surrounding environment of occupants and understanding all the factors influencing human thermal comfort conditions. There is also a high potential in employing industry 4.0 technologies to assist in designing more innovative solutions for thermal comfort. Furthermore, there is a need for local thermal standards targeting specific regions. The lack of interoperability between BIM 3D modelling and energy simulation tools remains an obstacle.

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“…A rectangular, aluminum heat exchanger with dimensions of 12 × 80 × 40 mm 3 is placed inside and attached to the left wall of the enclosure to maintain an isothermal boundary condition. Therefore, the PCM fills a space of 65 × 80 × 40 mm 3 . Four K-type thermocouples were placed inside the enclosure to monitor the temperature distribution.…”

Section: Latent Heat Thermal Energy Storage System Integrated With Me...mentioning

confidence: 99%

“…Pintaldi et al 2 reviewed different approaches for using TES technologies in solar cooling systems and absorption chillers. Ortega Del Rosario et al 3 explored using an air‐PCM, LHTES‐based HVAC system for providing buildings with thermal comfort conditions. Their findings reveal that air‐PCM units can limit the rise in temperature and decrease the amount of time the temperature exceeds the upper thermal comfort limit.…”

Section: Introductionmentioning

confidence: 99%

Application of partial wire mesh and particle image velocimetry for rectangular phase change material containers as efficient thermal energy storage systems

Nabilou

Gharali

Ebadi

et al. 2022

Energy Science & Engineering

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An experimental setup is built to improve the charging process of a bio‐based phase change material inside a rectangular latent heat thermal energy storage (LHTES) system. In addition to experimenting with different porosities of full‐coverage wire mesh, a novel method of partial wire mesh placement at a proper location is used for improving conduction and maintaining natural convection, proven by the particle image velocimetry (PIV) method. Although acquiring PIV images from coconut oil is challenging because of the laser reflection, the image capturing and processing have been completed successfully. Temperatures inside the enclosure were measured using four K‐type thermocouples, and the melt fraction was calculated using captured images. The full‐size mesh results in a more uniform temperature distribution, and its charging time for porosities of 88% and 82% is decreased by 41% and 52%, respectively. The results of partial wire mesh placements indicate that a top‐only approach leads to a time reduction of only 7%. However, the bottom‐only approach yields a time reduction of 34% and the value of 3.8 for the charging time reduction over the porosity reduction parameter, which is the highest among all experiments. Additionally, this placement eliminates sudden temperature spikes, which improves the performance of the LHTES system and results in an economical and practical configuration. Moreover, the PIV test shows sustained convective velocities at the top half of the enclosure with a partial mesh at the bottom, demonstrating improved natural convection compared to that of a full‐size mesh implementation which weakens convection. Therefore, contrary to full‐size meshes used in previous works, a bottom‐only mesh placement can enhance conduction and convection simultaneously, which can be utilized in practical applications.

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Operation assessment of an air-PCM unit for summer thermal comfort in a naturally ventilated building

Cited by 11 publications

References 21 publications

Characterization of Fatty Acids as Biobased Organic Materials for Latent Heat Storage

Characterization of Fatty Acids as Biobased Organic Materials for Latent Heat Storage

Thermal Comfort in Buildings: Scientometric Analysis and Systematic Review

Application of partial wire mesh and particle image velocimetry for rectangular phase change material containers as efficient thermal energy storage systems

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