Study of a PCM based energy storage system containing Ag nanoparticles

Zeng, Jinbo; Sun, Lin; Xu, Fen; Tan, Zhi‐Cheng; Zhang, Z. H.; Zhang, J.; Zhang, T.

doi:10.1007/s10973-006-7783-z

Cited by 142 publications

(40 citation statements)

References 22 publications

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“…The thermogravimetric analysis showed that nano-composite PCM microcapsules can maintain undamaged structure with a total weight loss of 10-15% while the conventional PCM microcapsules were destroyed and collapsed at 130 o C. The effect of silver nanoparticles on the thermal conductivity of 1-tetradecanol was investigated by Zeng et al [69]. The results indicated that there was no strong interaction between the silver nanoparticles and the PCM base fluid.…”

Section: Nano-enhanced Pcms With Other Pcms As Base Fluidsmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

158

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Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement. Abstract: Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement.

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Section: Nano-enhanced Pcms With Other Pcms As Base Fluidsmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

158

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“…The careful mixing of nanoparticles into the PCM is important to enhancing the thermal characteristics of the PCM. An ultrasonic vibrator was used to minimize the possibility of agglomeration of the nano-PCM (Ibrahim & Sreekantan, 2011;Zeng et al, 2006). Solid beeswax was prepared by shaving it.…”

Section: Preparation Of Nano-pcmmentioning

confidence: 99%

Thermal Properties of Beeswax/CuO Nano Phase-change Material Used for Thermal Energy Storage

Putra

Prawiro²,

Amin³

2016

IJTech

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Experimentation on and implementation of phase-change materials for thermal storage is attracting increasing attention by those seeking a potential resolution to energy issues. This study investigates beeswax as a high thermal-capacity phase-change material with the objective of analyzing the thermal properties and behaviors of beeswax/CuO nano-PCM. The study uses differential scanning calorimetry apparatus to measure the melting temperature and thermal capacity of nano-PCMs. The study found nano-PCM melting temperatures of 63.62°C, 63.59°C, 63.66°C, 63.19°C, and 62.45°C at 0.05, 0.1, 0.15, 0.2, and 0.25 wt%, respectively. FTIR testing found no chemical reaction between CuO and beeswax. The existence of CuO nanoparticles enhanced thermal conductivity of beeswax but reduced its heat capacity. However, the change in latent heat caused no significant effects in the performance of beeswax/CuO. Thus, the results showed that heat transfer of composite beeswax/CuO melts faster than base phase-change material.

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“…Different approaches have been proposed to overcome this problem: use of metal thin strips (Hoogendoorn and Bart, 1992), thin walled rings (Velraj et al 1999), porous metals (Weaver and Viskanta, 1986) porous graphite (Tayeb, 1996), metal foam matrix (Calmidi and Mahajan, 1999) and carbon fibers (Fukai et al 2000 and are among the common techniques used to enhance the effective thermal conductivity of PCMs. The presence of the nanoparticles in the PCM increases significantly the effective thermal conductivity of the fluid and consequently enhances the heat transfer characteristics (Cabeza et al , 2002;Mettawee, and Assassa, 2007;Khodadadi, and Hosseinizadeh, 2007;Zeng et al 2007;Pincemin et al, 2008;Kim and Drzal, 2009;Ho and Gao, 2009). …”

Section: Introductionmentioning

confidence: 99%

THERMAL PERFORMANCE ENHANCEMENT OF PARAFFIN WAX WITH AL2O3 AND CuO NANOPARTICLES – A NUMERICAL STUDY

Amirtham¹,

Sasmito²,

Mujumdar³

2012

Frontiers in Heat and Mass Transfer

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The heat transfer enhancement of paraffin wax, a cheap and widely used latent heat thermal energy storage material, using nanoparticles is investigated. The effects of nanoparticle volume fraction on both the melting and solidification rates of paraffin wax are analysed and compared for Al 2 O 3 and CuO nanoparticles. Present results show that dispersing nanoparticles in smaller volumetric fractions increase the heat transfer rate. The enhancement in thermal performance of paraffin wax is greater for Al 2 O 3 compared with that for CuO nanoparticles. .

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Study of a PCM based energy storage system containing Ag nanoparticles

Cited by 142 publications

References 22 publications

Nano-enhanced phase change materials for improved building performance

Nano-enhanced phase change materials for improved building performance

Thermal Properties of Beeswax/CuO Nano Phase-change Material Used for Thermal Energy Storage

THERMAL PERFORMANCE ENHANCEMENT OF PARAFFIN WAX WITH AL2O3 AND CuO NANOPARTICLES – A NUMERICAL STUDY

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