Evaluation of solar collector designs with integrated latent heat thermal energy storage: A review

Khan, Mehmood; Ibrahim, Nasiru I.; Mahbubul, I.M.; Ali, Hafız Muhammad; Saidur, R.; Al‐Sulaiman, Fahad A.

doi:10.1016/j.solener.2018.03.014

Cited by 221 publications

(59 citation statements)

References 87 publications

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“…The lower thermal conductivity of OPCMs reduces the rate of heat transfer, which causes increase in temperature gradient and insensitivity to temperature changes across the system boundaries. OPCMs, with potential advantage as TES materials, are being developed for applications including air conditioning, ie, natural air cooling, cold thermal storage and absorption refrigeration, waste heat recovery, solar energy storage, thermal regulating fabric, passive heating of building, heat pipes, desalination, thermal management of electronic devices and electric vehicle batteries, spacecraft, and other integrated thermal control systems such as trombe wall, PCM‐filled wallboards, shutter, concrete, under floor heating systems, ceiling boards, and hot water supply . However, the leakage issue and lower thermal conductivity of OPCMs causes harm with interacting medium and results in energy efficiency losses of the thermal system.…”

Section: Introductionmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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Summary With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage.

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Section: Introductionmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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“…In most residential, commercial, and industrial building equipment, such as those for bathing, laundry, and cleaning, the required hot water temperature is approximately 50°C to 60°C, this range is considered ideal for PCM melting . Flat plate collectors are the most common for low temperature applications (50°C‐70°C) . Papadimitratos et al presented integrated PCMs with solar evacuated tube collectors for water heating and performed several experiments; the heat pipe was immersed inside the PCMs, which was contained in the inner glass tube.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 Flat plate collectors are the most common for low temperature applications (50 C-70 C). 18 Papadimitratos et al 19 presented integrated PCMs with solar evacuated tube collectors for water heating and performed several experiments; the heat pipe was immersed inside the PCMs, which was contained in the inner glass tube. Compared with nonheat storage prototype, the heat storage parallel and series-parallel prototype had higher conversion efficiency, longer effective heating time, and better heating stability and practicability, and the heat storage solar collector had compact structure, which was convenient to use.…”

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confidence: 99%

Preparation and characterization of urea/ammonia bromide composite phase change material

Liu

Zhang

et al. 2020

Int J Energy Res

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Summary In order to find phase change materials that can be better applied in the field of solar collectors, the phase change heat storage properties of urea (U) and ammonium bromide (AB) were studied. The eutectic ratio of UAB was found by the Edison method, and different additives were added to UAB by dipping and mixing. The structure and property of the composites were characterized by X‐ray powder diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimetry (DSC), and TG/TGA, respectively. The results showed that the eutectic ratio of UAB was 6:3; it was weakly acidic after melting not layered. When 6‐wt% EG and 1‐wt% nanometer titanium dioxide (TiO2) were added, the thermal conductivity of the material increased by 3.62 times; the thermal diffusivity was increased by 6.77 times. When the mass fraction of EG is between 1% and 6%, the larger the mass fraction of EG, the greater the thermal conductivity of the material. After 1000 cycles, the composite material performance was stable; at the same time, the used materials can be used as fertilizers to solve the problem of material pollution, which indicated that the prepared UAB/TiO2/EG composite PCMs had great application prospect in the field of solar collectors.

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“…1,2 Batteries, hydrogen storage, pumped-hydro, flywheel, compressed air storage, supercapacitor, and superconducting magnetic energy storage (SMES) are the different energy options suitable for such a system. [3][4][5][6] However, all of them have different discharge times and cannot cater to the wide ranges of the timescale of the mismatch in renewable energy systems. Hence, often, a hybrid energystorage solution consists of different technologies with different timescales, which is preferred instead of relying on only one storage system.…”

Section: Introductionmentioning

confidence: 99%

Study of ABPBI membrane as an alternative separator for vanadium redox flow batteries

Bhattacharyya

Nayak

Ghosh³

2019

Energy Storage

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Vanadium redox flow batteries are receiving great attention due to their capabilities of offering multiscale energy-storage and cross-contamination-free system. Ion-exchange membrane (IEM), which is one of the critical components in the vanadium redox flow battery (VRFB) system, simultaneously prevents the cross-mixing of active vanadium species, and facilitates the movement of the proton. The cross-mixing of the vanadium species influences coulombic efficiency (CE), whereas the proton movement influences the voltage and energy efficiency (EE). Hence, IEM plays a major role in the performance of the battery in terms of self-discharge rate, CE, crossover of active material, and ionic conductivity. In the present work, the suitability of an alternative low-cost, efficient, and durable membrane, which are essential for providing a sustainable solution for VRFB, is studied. 2,5-Polybenzimidazole membrane is studied as an alternative membrane and evaluated in a VRFB with mixed electrolyte, which has the potential to offer a substantial reduction in the cost. The mixed electrolyte helps in extending the operating temperature.2,5-Polybenzimidazole membrane-based VRFB shows CE, EE, and voltage efficiency as 99%, 83%, and 84%, respectively, which is comparable to Nafion membrane. K E Y W O R D S2,5-polybenzimidazole (ABPBI), separator, vanadium redox flow batteries

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Evaluation of solar collector designs with integrated latent heat thermal energy storage: A review

Cited by 221 publications

References 87 publications

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

Preparation and characterization of urea/ammonia bromide composite phase change material

Study of ABPBI membrane as an alternative separator for vanadium redox flow batteries

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