CFD modelling of an indirect thermocline energy storage prototype for CSP applications

Cagnoli, Mattia; Gaggioli, Walter; Liberatore, Raffaele; Russo, Valeria; Zanino, Roberto

doi:10.1016/j.solener.2023.05.019

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…And to obtain the highest thermal energy, the values of the temperature between 150 o C to 240 o C were used from 8 am to 17 pm, and the working hours vary according to the year seasons [57][58][59][60][61][62][63][64][65][66][67]. According to the results of some researchers [18,34,58,[68][69][70][71][72], at an air temperature of 35, the system gives a heat concentration of up to 403 degrees Celsius, produced by one equivalent dish, equivalent to 4576 watts. And according to the estimate of the energy required for this work, it requires the installation of 8 solar collectors.…”

Section: Components and Alternative Of Orc Working Fluidsmentioning

confidence: 99%

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

Hassan

2024

Preprint

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This paper investigates finding the best working fluid to improve the giving of the solar organic Rankine cycle. A parabolic trough solar complex was designed to focus the sun rays on a vicious cylinder to produce sufficient steam to operate the ORC. The steam is collected in an isolated tank filled with molten salt called an evaporator. The heat gained in this evaporator is transferred to feed the power generation turbine. Ten different working fluids of R123, R143a, R433A, R290, R40, R22, R600a, R601, RC318 and R1270 were tested at a boiling temperature from 150°C to 240°C. The results showed that using R601 as a working fluid for ORC gave the highest thermal efficiency compared to other organic liquids tested at temperatures from 150 to 240 °C. R601 gives a gain in cycle thermal efficiency by about 24.6% relative using R600a. While R 290 gave an improvement in the power produced by the turbine estimated at 10% higher than that used at higher temperatures above 240° C.

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Section: Components and Alternative Of Orc Working Fluidsmentioning

confidence: 99%

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

Hassan

2024

Preprint

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“…Cagnoli et al established and validated a transient 2D CFD model for an indirect SMTHS tank, equipped with two flat tube heat exchangers [47]. The simulation results for the tank's charging and discharging processes indicated that the bypass in the heat exchanger position significantly reduced the thermal performance of the THS system.…”

Section: Heat Exchanger Configurationmentioning

confidence: 99%

“…Various types of models have been developed to investigate different aspects of THS. In the recent literature, software tools employed for numerical studies on THS include Ansys CFX [8], Ansys Fluent [27,46,47], Aspen Hysys [144], COMSOL [79], COMSOL Multiphysics [49,70,127], TRNSYS [42,147], NEST [19], EBSILON [72], and Star-CCM+ [47].…”

Section: Optimization Of Thermocline Heat Storage System Numerical Modelmentioning

confidence: 99%

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Zhang,

Guo,

Zhu

et al. 2024

Energies

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To achieve sustainable development goals and meet the demand for clean and efficient energy utilization, it is imperative to advance the penetration of renewable energy in various sectors. Energy storage systems can mitigate the intermittent issues of renewable energy and enhance the efficiency and economic viability of existing energy facilities. Among various energy storage technologies, thermocline heat storage (THS) has garnered widespread attention from researchers due to its stability and economic advantages. Currently, there are only a few review articles focusing on THS, and there is a gap in the literature regarding the optimization design of THS systems. Therefore, this paper provides a comprehensive review of the recent research progress in THS, elucidating its principles, thermal storage materials, applications, and optimization designs. The novelty of this work lies in the detailed classification and analysis of various optimization designs for THS, including tank shape, aspect ratio, inlet/outlet configuration, thermal energy storage materials arrangement, operating strategies, and numerical model optimization approaches. The limitations of existing research are also identified, and future perspectives are proposed, aiming to provide recommendations for THS research and contribute to the development and promotion of THS technology.

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Experimental and numerical investigation of a solar thermocline system for domestic water heating applications

Cheema,

Javaid,

Yildizhan

et al. 2024

J Therm Anal Calorim

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CFD modelling of an indirect thermocline energy storage prototype for CSP applications

Cited by 4 publications

References 26 publications

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Experimental and numerical investigation of a solar thermocline system for domestic water heating applications

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