Recent advancements in latent heat phase change materials and their applications for thermal energy storage and buildings: A state of the art review

Sustainable Energy Technologies and Assessments, Journal Year: 2021, Volume and Issue: 49, P. 101646 - 101646

Published: Nov. 9, 2021

Language: Английский

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Advancements and prospects of thermal management and waste heat recovery of PEMFC

International Journal of Thermofluids, Journal Year: 2021, Volume and Issue: 9, P. 100064 - 100064

Published: Jan. 10, 2021

Despite that the Proton Exchange Membrane Fuel Cell (PEMFC) is considered to be an efficient power device; around half of energy produced from electrochemical reaction dissipated as heat due irreversibility cathodic reaction, Ohmic resistance, and mass transport overpotentials. Effective removal PEMFC, via cooling, very important maintain cell/stack at a uniform operating temperature ensuring durability device excessive may dry out membrane reduces surface area catalyst hence lowering performance cell. In addition capturing repurposing it using one Waste Heat Recovery (WHR) technologies effective approach add great economic value PEMFC system. Global warming, climate change, high cost production are main drivers improve efficiency WHR. This paper presents overview recent progress concerning cooling strategies WHR opportunities for PEMFC. The techniques PEMFCs described evaluated with respect their advantages disadvantages. Additionally, potential pathways PEMFC-WHR including heating, generation explored assessed. Furthermore, challenges research prospects discussed.

Language: Английский

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Heat transfer and pressure drop performance of Nanofluid: A state-of- the-art review

International Journal of Thermofluids, Journal Year: 2021, Volume and Issue: 9, P. 100065 - 100065

Published: Jan. 18, 2021

Nanofluid is considered to be a new generation heat transfer medium which has attracted significant attention from the research community for past two decades due its reported high effectiveness in various applications. Dispersed solid nanoparticles with enhanced thermal conductivity base fluid possess substantial competence augmenting performance at expense of moderate pumping power. This inclusive study elaborates impact nanofluids on thermo-hydraulic devices order ensure appropriate selection and implementation engineering devices. Inclusion nanofluid as systems requiring rate e.g. solar conversion systems, HVAC electronic equipment, exchangers, nuclear reactors have imparted greater role reducing negative impacts climate change. The influence size, concentration, type shape nanoparticles, working temperature, compound passive techniques magnetic field effect pressure drop are extensively discussed along drawbacks such formation fouling surfaces. comprehensive review will beneficial engineers, researchers, academics commend significance comprehend their remarkable

Language: Английский

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Melamine foam/polyethylene glycol composite phase change material synergistically modified by polydopamine/MXene with enhanced solar-to-thermal conversion

Renewable Energy, Journal Year: 2021, Volume and Issue: 171, P. 1 - 10

Published: Feb. 21, 2021

Language: Английский

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Thermophysical properties of graphene-based nanofluids

International Journal of Thermofluids, Journal Year: 2021, Volume and Issue: 10, P. 100073 - 100073

Published: Feb. 26, 2021

Heat transfer operations are very common in the process industry to a huge amount of thermal energy, i.e., heat, from one fluid another for different purposes. Many fluids used as heat (HTF), which water is most HTF due its high specific availability, and affordability. However, conventional HTFs, including water, have lower conductivity, critical thermophysical property, hence decreased efficiency. The addition solid particles highly thermally conductive material, specifically at nano-size, nanoparticles NPs, result nanofluid NF, has evolved over last two decades efficient been investigated wide range applications. Among graphene (Gr) based materials shown potential NF conductivity up 5,000 W/m.K, higher NF. This work aims thoroughly discuss properties Gr-based NFs, capacity, density, viscosity. discussion focus on it ultimate determinator characteristics HTF, such convective overall coefficient well capacity expands relative enhancement reaching 40% increase property. shows that much widely studied metal oxide content, density viscosity increase, determining pumping power requirements. Critical challenges facing application NFs cost, stability, increased viscosity, environmental impacts discussed with mitigation recommendations given.

Language: Английский

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A review of geothermal energy-driven hydrogen production systems

Thermal Science and Engineering Progress, Journal Year: 2021, Volume and Issue: 22, P. 100854 - 100854

Published: Jan. 27, 2021

Language: Английский

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What about greener phase change materials? A review on biobased phase change materials for thermal energy storage applications

International Journal of Thermofluids, Journal Year: 2021, Volume and Issue: 10, P. 100081 - 100081

Published: March 20, 2021

The increasing energy demand in conjunction with greater environmental concern has lifted the development of sustainable sources, including materials for storage. use phase change (PCM) thermal storage (TES) become one emerging research fields. Paraffins are currently most studied organic PCMs TES applications due to their favorable physical and properties. However, they produced from non-renewable sources carbon footprint associated impact cannot be overlooked. A green alternative biobased such as fatty acid esters andfatty acids. present paper reviews current status focus on various limitations drawbacks, strategies adopted improving characteristics. also discusses waste biomaterials cooking oil non-edible plant oils potential alternatives edible based PCMs. Novel which could serve a cornerstone further new future, discussed.

Language: Английский

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Phase change materials in solar domestic hot water systems: A review

International Journal of Thermofluids, Journal Year: 2021, Volume and Issue: 10, P. 100075 - 100075

Published: March 2, 2021

In this work, technologies related to the storage of solar energy, utilizing latent heat content phase change materials for production domestic hot water are reviewed. Many researchers have been involved in field order accomplish targets environmentally friendly solutions and higher efficiency. For use, with melting temperature between 40 80 °C commonly studied, paraffins, fatty acids, salt hydrates alcohols being most popular. harvesting radiation, usually flat plate or evacuated tubes collectors used, either commercial ones modified. The unit may include only material it can a hybrid form combined water. outcome studies, is that addition comparison systems without storage, increases duration release towards at end day also collector's efficiency because does not experience large fluctuations. However, difficulties emerge during selection appropriate as must high provide enough water, but than collector produce, fully melt material. Moreover, investigation necessary optimum flow rate minimizes charging maximizes system amount. Another challenge face low thermal conductivity many materials. purpose, methods improving performance examined they reported.

Language: Английский

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Phase change material (PCM) candidates for latent heat thermal energy storage (LHTES) in concentrated solar power (CSP) based thermal applications - A review

Renewable and Sustainable Energy Reviews, Journal Year: 2023, Volume and Issue: 189, P. 113904 - 113904

Published: Nov. 5, 2023

Language: Английский

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Concentrating solar power (CSP) technologies: Status and analysis

International Journal of Thermofluids, Journal Year: 2023, Volume and Issue: 18, P. 100340 - 100340

Published: March 28, 2023

Concentrated solar power (CSP) technology is a promising renewable energy worldwide. However, many challenges facing this nowadays. These are mentioned in review study. For the first time, work summarized and compared around 143 CSP projects worldwide terms of status, capacity, concentrator technologies, land use factor, efficiency, country other factors. Further, various spread-out system highlighted heat transfer fluids (HTF), storage (ES) cooling techniques, water management, Levelized Cost Electricity (LCOE). Also, thermophysical properties HTF within applicable range operation. At end review, hybridization technologies for with sources, including photovoltaic, wind, geothermal, compared. The pioneering using CSP, leading technology, suitable ES efficient hybrid technique based on LCOE determined. analyzed data study essential predicting future markets its contribution to reducing global warming potential.

Language: Английский

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