Advances in low to medium temperature non-concentrating solar thermal technology

Islam, Md. Parvez; Morimoto, Takeshi

doi:10.1016/j.rser.2017.08.030

Cited by 26 publications

(14 citation statements)

References 141 publications

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“…7. This clearly indicates that heat transfer rate with a low flow rate is higher [29] whereas high fluid flow decreases the overall heat transfer coefficient for the SFPC [36].…”

Section: Temperature Profilementioning

confidence: 91%

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

et al. 2020

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The aim of this study involves establishing a three-dimensional computational fluid dynamic (3D-CFD) model of solar flat plate collector (SFPC) in order to investigate the effect of operating and geometric parameters on thermal efficiency. In this research work, commercial CFD code ANSYS FLUENT ® 14.0 version was used for the development of a model of solar plate collector. The single circular tube geometry was created using ANSYS DesignModeler ® 14.0. The general continuity equation along with Navied-Stokes equations was solved for tracking motion of the working fluid. The general k-ε turbulence modeling approach was used for solving the turbulence in the flow. Solar ray tracing was activated for calculating solar load in the model. The latitude and longitude of the Hyderabad region were inserted in the solar raytracing model for calculating solar intensity as per local conditions. Two fluids i.e., water and air were circulated with different flow rates in the developed model of SFPC. It was observed that water gave higher efficiency due to high density and thermal conductivity. The simulation results gathered revealed that the temperature of water and air was raised by almost 79 °C and 73 °C respectively.

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“…7. This clearly indicates that heat transfer rate with a low flow rate is higher [29] whereas high fluid flow decreases the overall heat transfer coefficient for the SFPC [36].…”

Section: Temperature Profilementioning

confidence: 91%

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

et al. 2020

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“…Table 5. Solar energy collectors (Ben Hassine et al, 2014;Faninger, 2010;Islam et al, 2018). In a global context, evacuated tube collectors were the predominant ST collector technology with a share of (71.6%) followed by flat plate collectors (22.1%), unglazed water collectors (6.1%), and glazed and unglazed air collectors (0.3%).…”

Section: St Use and Technologiesmentioning

confidence: 99%

A Review on Solar Thermal Utilization for Industrial Heating and Cooling Processes: Global and Ethiopian Perspective

Hiben

Kahsay

Lauwaert

2021

mejs

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A substantial share of the total energy in various countries is consumed by industries and manufacturing sectors. Most of the energy is used for low and medium temperature process heating (up to 3000C) as well as low and medium cooling capacity (up to 350kW). To meet the demand, the industrial sector consumes most of its energy in either thermal (heat) or electrical energy forms. The use of fossil fuels accounts for about half of the overall share. This resulted in a necessity to commercialize local and clean renewable energy sources efficiently considering the reduction of economic dependence on fossil fuels and greenhouse gases emission. As such, solar energy has proven potential and resulted in considerable development and deployment of solar heating industrial processes (SHIP) and solar cooling systems in recent times. Thus, an attempt to present a review of the available literature on overall energy intensiveness, process temperature levels, solar technology match, and solar thermal system performance and cost have been made in this paper. The review also includes identifying the potential and relevance of involving solar thermal for industrial heating and cooling demand. As a result, at least 624 SHIP including promising large-scale plants and 1350 solar cooling systems most of them in small and medium capacities in operation are identified. Though limited data is available for solar cooling potential and installation, investigations projected the global SHIP potential to 5.6 EJ for 2050. Consequently, given the presence of many low and medium temperature heating processes and cooling capacities in industries with immense solar energy potential, developing counties such as Ethiopia can take experience and pay attention to the development of sustainable industrial systems.

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“…Following these needs, many TES devices were successfully developed and implemented in both residential and commercial structures [8]. In addition to this, the increasing development of renewable energy sources creates the need to reinvent energy demand management resulting in integrated solutions where TES technologies are coupled with photovoltaic panels and/or solar thermal technologies in order to manage the peak of electricity demand and reduce the costs related to electricity consumption [9,10].…”

Section: Introductionmentioning

confidence: 99%

Hydrated Salt/Graphite/Polyelectrolyte Organic-Inorganic Hybrids for Efficient Thermochemical Storage

et al. 2019

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Hydrated salt thermochemical energy storage (TES) is a promising technology for high density energy storage, in principle opening the way for applications in seasonal storage. However, severe limitations are affecting large scale applications, related to their poor thermal and mechanical stability on hydration/dehydration cycling. In this paper, we report the preparation and characterization of composite materials manufactured with a wet impregnation method using strontium bromide hexahydrate (SBH) as a thermochemical storage material, combined with expanded natural graphite (G). In addition to these fully inorganic formulations, an organic polyelectrolyte (PDAC, polydiallyldimethylammonium chloride) was exploited in the structure, with the aim to stabilize the salt, while contributing to the sorption/desorption process. Different formulations were prepared with varying PDAC concentration to study its contribution to material morphology, by electron microscopy and X-ray diffraction, as well as water sorption/desorption properties, by thermogravimetry and differential calorimetry. Furthermore, the SBH/G/PDAC powder mixture was pressed to form tabs that were analyzed in a climatic chamber, which is evidence for an active role of PDAC in the improvement of water sorption, coupled with a significant enhancement of mechanical resistance upon hydration/dehydration cycling. Therefore, the addition of the polyelectrolyte is proposed as an innovative approach in the fabrication of efficient and durable TES devices.

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Advances in low to medium temperature non-concentrating solar thermal technology

Cited by 26 publications

References 141 publications

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

A Review on Solar Thermal Utilization for Industrial Heating and Cooling Processes: Global and Ethiopian Perspective

Hydrated Salt/Graphite/Polyelectrolyte Organic-Inorganic Hybrids for Efficient Thermochemical Storage

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