Accelerated thermal cycle test of acetamide, stearic acid and paraffin wax for solar thermal latent heat storage applications

Sharma, Atul; Sharma, Susmita; Buddhi, D.

doi:10.1016/s0196-8904(01)00131-5

Cited by 206 publications

(63 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thermal cycling tests to check the stability of PCMs in latent heat storage systems were carried out for organics, salt hydrates and salt hydrates mixtures by many researchers [25][26][27][28][29]. Some potential PCMs were identified to have good stability and thermo-physical properties.…”

Section: Thermal Stability Of Pcmsmentioning

confidence: 99%

Review on thermal energy storage with phase change materials (PCMs) in building applications

2012

View full text Add to dashboard Cite

Thermal energy storage with phase change materials (PCMs) offers a high thermal storage density with a moderate temperature variation, and has attracted growing attention due to its important role in achieving energy conservation in buildings with thermal comfort. Various methods have been investigated by previous researchers to incorporate PCMs into the building structures, and it has been found that with the help of PCMs the indoor temperature fluctuations can be reduced significantly whilst maintaining desirable thermal comfort. This paper summarises previous works on latent thermal energy storage in building applications, covering PCMs, the impregnation methods, current building applications and their thermal performance analyses, as well as numerical simulation of buildings with PCMs. Over 100 references are included in this paper.

show abstract

Section: Thermal Stability Of Pcmsmentioning

confidence: 99%

Review on thermal energy storage with phase change materials (PCMs) in building applications

2012

View full text Add to dashboard Cite

show abstract

“…The results show that the progressive residual weight percentage at 60℃drying condition was about 42% whereas under 25℃ it was at the rate of 8% after 60 days. Sharma et al [103] proposed an accelerated thermal cycle testing method to study the changes in latent heat and melting temperature of acetamide, stearic acid and paraffin wax. The results showed good thermal stability for the paraffin and acetamide after 1500 thermal cycles.…”

Section: Thermal Stabilitymentioning

confidence: 99%

Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

711

267

View full text Add to dashboard Cite

Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition, they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles was identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs. Abstract: Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles were identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs.

show abstract

“…In these conditions, their latent heat of phase change generally ranges from 100 J g -1 to 300 J g -1 . However, literature shows that the performance of paraffin-type PCMs can be affected after thermal cycling: in some studies, the latent heat of the tested paraffin remained constant during thermal cycling [5,6] whereas in some others, it declined, for example by 20 % after 600 thermal cycles [7] or by 25 % after 1500 thermal cycles [8]. Besides, the temperature of solidification of a PCM is often below its temperature of fusion because of supercooling, a metastable state of the liquid PCM below its temperature of fusion.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study of a thermal damper based on a CNT/PCM composite structure for transient electronic cooling

Kinkelin

Lips

Soupremanien

et al. 2017

Energy Conversion and Management

View full text Add to dashboard Cite

Theoretical and experimental study of a thermal damper based on a CNT/PCM composite structure for transient electronic cooling. Energy Conversion and Management, Elsevier, 2017, 142, pp.257-271 AbstractThe present study focuses on a thermal damper that aims at smoothing the temperature peaks experienced by electronic components during transient solicitations. It consists of a silicon casing containing a densified or undensified carbon nanotube (CNT) array -linking directly both sides of the system -filled with phase change material (PCM). Theoretical consideration enables to define the concept of ideal thermal damper in order to study the foreseeable performance of this kind of system. Its thermal effectiveness can be predicted by means of two non-dimensional numbers, linked to the thermal capacity of the system and to the latent heat of the PCM. A numerical model shows that the behavior of a non-ideal thermal damper can differ from that of an ideal thermal damper: it is mostly affected by the thermal resistance at the interface between the silicon and the CNT and the temperature glide during the PCM phase change. To complete the study, prototypes of thermal dampers are experimentally characterized, in terms of heat storage and heat conduction performance. An estimation method of the total apparent thermal capacity of the tested sample is developed in order to quantify its latent heat storage capacity. The latent energy storage density is 1.6 J cm -2 for the best sample and is observed to be preserved after 850 thermal cycles. The total thermal resistance of the thermal damper is estimated by means of a laser flash test and a simple model of the sample. Sensitivity analyses show that the main thermal resistances are located at the interfaces between silicon and CNT.Keywords: vertically aligned carbon nanotubes, phase change material, thermal energy storage, interfacial thermal resistance, transient electronic cooling Highlights: Two non-dimensional parameters enabling to design an ideal thermal damper are identified  Latent energy storage capacity of embedded PCM is estimated and reaches 1.6 J cm -²

show abstract

Accelerated thermal cycle test of acetamide, stearic acid and paraffin wax for solar thermal latent heat storage applications

Cited by 206 publications

References 4 publications

Review on thermal energy storage with phase change materials (PCMs) in building applications

Review on thermal energy storage with phase change materials (PCMs) in building applications

Review of solid–liquid phase change materials and their encapsulation technologies

Theoretical and experimental study of a thermal damper based on a CNT/PCM composite structure for transient electronic cooling

Contact Info

Product

Resources

About