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They found that the efficiency of evacuated-tube solar collector with U-tube and exit fluid temperature would increase by 10% and 16%, respectively, if the thermal conductivity increased from 5 to 40 W/m·K. Some researchers tried to modify the inner structure of evacuated tube to reduce thermal resistance.
In this work, heat transfer mechanisms involved in solar thermal devices, such as flat plate collector, evacuated tube collector, solar concentrating collectors, solar pond, solar distillation, solar dryer, and solar refrigeration are discussed and important observations made by various researchers are also presented.
Chopra et al. (2018) presented a comprehensive report on advances on thermal analysis considering design aspects with heat pipe and without heat pipes. Authors suggested that for medium temperature application, evacuated tube collector equipped with PCM can be viable solution for solar energy harvesting.
In this work, heat transfer in solar thermal devices, viz., flat plate collector (FPC) (air and water), evacuated tube collector (ETC ), solar concentrating collectors, solar pond, solar distillation, solar dryer, and solar refrigeration are discussed in brief and critical observations made by various researchers are also presented.
Design, process, modeling, PCM integration and working fluid parameters are considered for qualitative and quantitative enhancements in thermal and exergetic analysis of solar collectors. Tables are used for detailed discussion and cause and effect analysis of intended outcomes.
Solar thermal collectors have been widely studied, and various new designs were reported. To improve the performance of these solar devices, it is essential to understand the heat transfer behavior of the systems.
The presented review is focused on synergistic approaches, processes, design criterions and advances in working fluids to achieve optimum thermal and exergy efficiency for …
This study proposed a model of a porous media-assisted flat-plate solar collector (FPSC) using nanofluid flow. The heightened thermal efficiency of FPSC undergoes …
Solar thermal collectors are the core components of solar thermal energy systems, converting the solar radiation into heat, which is transported to a demand location by …
The efficiently optimized evacuated solar collector adopts a new glass-metal sealing technology, which can further enhance the isolation of air from the solar collector to a …
The thermal conductivity of FDGM1000 and FDZL1000 is 0.1346 W/(m·K) and 0.08339 W/(m·K). The thermal conductivity is lower due to the presence of pores inside the char, which are filled …
The photothermal efficiency of the direct solar collector can be improved to remove the absorbed heat; the conductive and convective heat generated in the direct solar collector were removed by passing nanofluids …
In this study, the thermal performance of a solar collector of an evacuated tube with a U-tube has been investigated. The mathematical model used was a 1D analytical model …
2 · It should be noted that the outer face of the solar collector is thermally insulated with 0.05 m of glass wool, with a thermal conductivity of 0.03 W/(m K) and 0.05 m of polystyrene, …
Solar-powered absorption chillers: A comprehensive and critical review. Alec Shirazi, ... Stephen D. White, in Energy Conversion and Management, 2018 3.5.1 Solar thermal collectors. A solar …
Evacuated-tube solar collector (ETSC) is developed to achieve high heating medium temperature. Heat transfer fluid contained inside a copper heat pipe directly affects …
Evacuated-tube solar collector (ETSC) is developed to achieve high heating medium temperature. Heat transfer fluid contained inside a copper heat pipe directly affects …
2 · It should be noted that the outer face of the solar collector is thermally insulated with …
Jamshed, W. et al. Thermal characterization of coolant Maxwell type nanofluid flowing in parabolic trough solar collector (PTSC) used inside solar powered ship application. …
The design and development of an experimental medium-temperature solar thermal collector, the external compound parabolic concentrator (XCPC), is presented in …
Abolfazl et al. propose solutions to improve the thermal performance of paraffin as a Phase-change Material (PCM) in solar flat-plate collector systems for domestic and …
The total thermal resistance was a series network of the individual thermal resistances, consisting of thermal resistance of copper heat pipe layer, thermal resistance of …
In this work, heat transfer mechanisms involved in solar thermal devices, such as flat plate collector, evacuated tube collector, solar concentrating collectors, solar pond, solar …
Thermal performance enhancement of a flat plate solar collector using hybrid nanofluid Omar A. Hussein a,b, Khairul Habib a,⁎, Ali S. Muhsan a, R. Saidur c,d, Omer A. …
The total thermal resistance was a series network of the individual thermal resistances, consisting of thermal resistance of copper heat …
solar collector''s thermal efficiency is reduced at high intake temperatures with a heat shiel d achieved 5 4.70 %, which was 31.49 % greater than the solar collec tor without a …
In this work, heat transfer mechanisms involved in solar thermal devices, such …
The thermal conductivity of FDGM1000 and FDZL1000 is 0.1346 W/(m·K) and 0.08339 …
Solar collectors are energy harvesting devices that convert solar radiation into heat energy and transport the generated heat via a working fluid (heat transfer fluid) in a riser …
The presented review is focused on synergistic approaches, processes, …
The design and development of an experimental medium-temperature solar …
In this study, the thermal performance of a solar collector of an evacuated tube …