“…It can be seen in Figure 7 that the solar collector used in low temperature (≤200 °C) solar-ORC applications includes the ETC, CPC, and the most common used both in a small and industry scale is FPC and advance FPC. Figure 7 Solar collector type: (a) ETC ( Ismail et al., 2021 ), (b) CPC ( Paul, 2019 ), (c) FPC ( Hawwash et al., 2018 ). …”
Section: Classification Of Solar-orcmentioning
confidence: 99%
“… Solar collector type: (a) ETC ( Ismail et al., 2021 ), (b) CPC ( Paul, 2019 ), (c) FPC ( Hawwash et al., 2018 ). …”
“…It can be seen in Figure 7 that the solar collector used in low temperature (≤200 °C) solar-ORC applications includes the ETC, CPC, and the most common used both in a small and industry scale is FPC and advance FPC. Figure 7 Solar collector type: (a) ETC ( Ismail et al., 2021 ), (b) CPC ( Paul, 2019 ), (c) FPC ( Hawwash et al., 2018 ). …”
Section: Classification Of Solar-orcmentioning
confidence: 99%
“… Solar collector type: (a) ETC ( Ismail et al., 2021 ), (b) CPC ( Paul, 2019 ), (c) FPC ( Hawwash et al., 2018 ). …”
“…The ETC presented high e ciency using hybrid nano uid 2.5g CuO + 1.5g Cu in different ow rates. Ismail et al [14] made a numerical comparative study about the use of circular and rectangular absorbers for ETC using Al 2 O 3 /water as a nano uid. The best ETC con guration is using a circular absorber and the maximum improvement in the ETC e ciency using nano uid was about 9%.…”
In this study, an experimental and numerical investigation of eight geometrical con gurations of evacuated tube solar collectors was conducted. The con gurations were tested simultaneously in outdoor installation under the same test conditions. The parameters such as collector eccentricity, solar concentration, vacuum, collector absorber, and cover tube materials were investigated. The numerical model developed in MATLAB was validated with experimental results. The results show that the eccentricity and the absorptivity of the material of the absorber are the parameters that have the highest in uence on the collector performance. The use of re ective lm in the eccentric solar collectors' con gurations can increase e ciency by 33%. The vacuum presented an e ciency increase variation between 1% and 4% in the eccentric tube collectors. For the concentric collectors con gurations, the use of the vacuum between the tubes can reach an increase of 9% in its performance. The eccentricity of the collector using re ective lm and vacuum allows an effective solar concentration in the collector absorber presenting a 26% higher e ciency when compared with the concentric collector.
“…Nitsas and Koronaki [19] developed a mathematical model for the energy and exergy efficiency of an evacuated tube collector, which was validated by experimental data. Ismail et al [20] performed a comparative study of a evacuated collector with a circular and a rectangular absorber with heat transfer fluids enhanced with nanofluids.…”
This study presents a combined thermal and optical, three-dimensional analysis of an asymmetric compound parabolic collector (ACPC) with an integrated hybrid photovoltaic/thermal (PV/T) receiver with the aim of establishing a sustainable approach in two ways: firstly, by determining the optimal tilt angle for operations, and secondly, by introducing an innovative simulation method which reduces computational cost while calculating thermal performance. Initially the Incident Angle Modifier ( ) was calculated for a wide range of incident angles, and the ray-tracing results were verified using three different simulation tools (Tonatiuh, COMSOL, and SolidWorks) with mean deviations being lower than 4%. The optimal tilt angle of the collector was determined for seven months of the year by conducting a detailed ray-tracing analysis for the mean day of each month considering whole day operation. In the thermal analysis part, the authors introduced novel numerical modeling for numerical simulations. This modeling method, designed with sustainability in mind, enables lighter computational domains for the air gap while achieving accurate numerical results. The approach was established using two distinct simulation tools: COMSOL and SolidWorks. From the optical analysis, it was found that in all months examined there is a four-hour time range around solar noon in which the optimum tilt angle remains constant at a value of 30°. The numerical models constructed for the thermal analysis were verified with each other (6.15% mean deviation) and validated through experimental results taken from the literature regarding the examined collector (<6% mean deviation). In addition, the two simulation tools exhibited a deviation of around 6% between each other. Finally, the thermal performance of the collector was investigated for the mean day of September at solar noon by adopting the optimal tilt angle for that month according to the optical analysis, considering inlet temperatures from 20 °C up to 80 °C.
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