Experimental study in a compound parabolic solar concentrator with different configurations of thermal energy storage system

Christopher, S.; Ahmed, Kalilur Rahiman Arshad; Shyam, Ashokkumar; Iniyan, S.

doi:10.1080/15435075.2023.2194970

Cited by 5 publications

(1 citation statement)

References 34 publications

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“…Thermal energy storage (TES) is an efficient method for storing energy compared to other energy storage technologies. [1][2][3] Among the thermal energy storage, latent heat energy storage (LHTES) offers higher energy storage density and virtually isothermal storage and retrieval, as reported by Christopher et al 4 and Thakur et al 5 Latent heat storage frequently involves the use of phase change materials (PCMs), which are classified into three types: organic, inorganic, and eutectic mixes. The most desirable organic PCMs are paraffins due to their favorable phase change characteristics, such as congruent melting and solidification with negligible subcooling.…”

Section: Introductionmentioning

confidence: 99%

Assessing performance of an external compound parabolic concentrator solar collector with cascaded latent heat thermal storage

Sathiya Satchi,

Muthuraman,

Thakur

et al. 2024

Env Prog and Sustain Energy

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This study presents quantitative results of charging experiments conducted on cascaded thermal energy storage system (CTESS) integrated with external compound parabolic concentrator solar collector (XCPCSC). Increasing mass flow rate in 2‐stage CTESS integrated with XCPCSC resulted in a 30% reduction in initiation time of phase change materials (PCMs) during charging, with a higher mass flow rate of 0.025 kg/s. However, due to disparate melting point temperatures of PCMs, phase transition in the two‐stage CTESS did not occur simultaneously, leading to poor heat transfer rates within the CTESS. To address this, study extended number of phases from two to three, resulting in a 1.5‐fold increase in rate of heat transfer compared to 2‐stage PCM system. The simultaneous melting processes at various stages in the CTESS maximized energy absorption, leading to a 25% increase in system efficiency. Notably, the values of energy stored efficiency and over‐all efficiency reached their peak values of 95% and 60%, respectively, between t = 12.00 h and t = 13.00 h. This time period also saw a significant increase in collector efficiency to 72%. These quantitative findings highlight importance of mass flow rate and PCM arrangement in achieving efficient heat transfer and system performance in a CTESS integrated with XCPCSC.

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Section: Introductionmentioning

confidence: 99%

Assessing performance of an external compound parabolic concentrator solar collector with cascaded latent heat thermal storage

Sathiya Satchi,

Muthuraman,

Thakur

et al. 2024

Env Prog and Sustain Energy

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Experimental investigation in the selection of phase change materials based on thermal stratification effect in thermal energy storage system

Christopher

Vikram

Bharathi

2023

Env Prog and Sustain Energy

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This study aims to evaluate the effects of thermal stratification on thermal energy storage (TES) systems during the charging process and choose suitable phase change materials (PCMs) for various layers. The research revealed that fiberglass insulation of 60 mm thick significantly decreased natural convection losses and increased the TES system's potential for energy recovery. For constant heat load, the charging time increased with increasing HTF inlet temperature, but remained constant for the first TES layer at a specified flow rate, resulting in increased storage capacity with minimal heat loss to the surroundings. The solar collector efficiency was shown to be dependent on solar radiation and collector efficiency, with peak efficiency seen at specified periods. The lowest melting point of PCMs at each layer 68°C, 62.7°C, 57°C, and 50°C was chosen based on temperature graphs. For comparing stratification behavior, the “MIX” number versus non‐dimensional charging time plot was effective. Additional experiments are needed to assess the selected PCMs' charging and discharging properties.

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Thermal performance and flash point analyses of concentrator photovoltaic (CPV) system using multiple types of PCMs and various panel inclination angles under the effect of a constant heat flux

Boucetta,

Chibani,

Hebbir

et al. 2024

Journal of Engineering Research

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Experimental study in a compound parabolic solar concentrator with different configurations of thermal energy storage system

Cited by 5 publications

References 34 publications

Assessing performance of an external compound parabolic concentrator solar collector with cascaded latent heat thermal storage

Assessing performance of an external compound parabolic concentrator solar collector with cascaded latent heat thermal storage

Experimental investigation in the selection of phase change materials based on thermal stratification effect in thermal energy storage system

Thermal performance and flash point analyses of concentrator photovoltaic (CPV) system using multiple types of PCMs and various panel inclination angles under the effect of a constant heat flux

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