Review
Energy & Fuels
Akanksha Maurya, Anoop Kumar, Deepak Sharma
Summary: This paper provides a comprehensive review of research on solar cavity receiver and offers suggestions for improving system performance. The focus of the research is on increasing thermal efficiency and reducing heat loss, and various parameters that affect receiver performance are analyzed. Heat loss models and mechanisms are also discussed. The article covers a wide range of literature and presents thermal efficiency results for different types of cavity receivers.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Thermodynamics
Abhinav Rajan, Kalvala S. Reddy
Summary: This study investigates the convection heat loss from a conical cavity receiver of a solar parabolic dish collector using a numerical method and artificial neural network. The results show that the heat loss is primarily influenced by geometrical parameters, receiver orientation, and wind characteristics.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Elumalai Vengadesan, Pathinettampadian Gurusamy, Ramalingam Senthil
Summary: A novel flat surface receiver with square cross-sectioned tubular fins is introduced to improve the thermal performance of a parabolic dish collector. Real-time investigation shows that with increasing water flow rate, the maximum temperature difference decreases and the time of water boiling is delayed. The receiver achieves high thermal and exergy efficiencies and has a lower cost per kWh of useful energy compared to coal power plants.
Article
Thermodynamics
Saurabh Jaywant Mohite, K. S. Reddy
Summary: The solar thermochemical cycle is an emerging clean hydrogen production technique that requires optimal configuration of a solar parabolic dish collector (PDC) for efficient thermal energy. A numerical model with non-uniform heat flux input is validated, and an artificial neural network model is adopted to predict the heat flux and uniformity factor values of PDC.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Xueling Li, Renfu Li, Huawei Chang, Lijian Zeng, Zhaojun Xi, Yichao Li
Summary: This study proposes a cavity receiver enhanced with a transparent aerogel, which can significantly reduce heat loss and improve efficiency. However, the effectiveness of the aerogel decreases as the intercepted solar radiation energy increases.
Article
Environmental Sciences
Arjun Singh Kopalakrishnaswami, Sendhil Kumar Natarajan
Summary: Solar parabolic dish concentrators are efficient technologies for solar power conversion, and a novel cavity receiver design was proposed in this study. Through analysis, it was found that the modified conical cavity receiver had the lowest heat losses compared to other types of receivers, making it the best choice for the solar dish system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Alibakhsh Kasaeian, Amir Kouravand, Mohammad Amin Vaziri Rad, Siavash Maniee, Fathollah Pourfayaz
Summary: This paper reviews previous studies on the applications of solar dish concentrators, focusing on different cavity receiver geometries and their optimization methods. Results show that the geometry of the cavity receiver has a significant impact on thermal efficiency, playing a crucial role in improving system efficiency.
Article
Green & Sustainable Science & Technology
Abhinav Rajan, K. S. Reddy
Summary: In this study, a coupled optical-thermal investigation was conducted for a novel cavity receiver of a 40 m2 parabolic dish collector to estimate its thermal performance. The study discussed the variation of thermal performance with inclination, wind direction, wind speed, and inlet temperature. The results showed that the cavity receiver achieved an optical performance of 84.15% and a thermal performance of 73.11% under specific conditions.
Article
Energy & Fuels
Abhinav Rajan, K. S. Reddy
Summary: This article presents an optical investigation and parameter optimization of a corrugation cavity receiver for a 100 m(2) parabolic dish collector. The optimized receiver design shows excellent performance and can be helpful for engineers and researchers in designing the optimized optical receiver for solar parabolic dish collector systems.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Thermodynamics
Sajid Abbas, Yanping Yuan, Atazaz Hassan, Jinzhi Zhou, Ammar Ahmed, Li Yang, Emmanuel Bisengimana
Summary: The proper design and accurate selection of operating parameters are crucial for solar energy conversion and utilization in a parabolic dish concentrator system. This study comprehensively investigated the design, simulation, and experimental thermal performance of a conical cavity tube receiver for parabolic dish concentrators at various concentration ratios. The results showed that the conical receiver had an average exergy efficiency of 8.16% and an energy efficiency of 65.81% at the highest concentration ratio of 31.15. The findings provide valuable insights for optimizing the design of parabolic dish concentrator systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Pouya Esfanjani, Ali Mahmoudi, Mohammad Sadegh Valipour, Saman Rashidi
Summary: Solar thermal energy is a promising solution to address the environmental and energy demands. Parabolic dish collectors are preferred due to their high working temperature range and thermal performance. By utilizing a cylindrical-conical cavity receiver equipped with ceramic fiber insulation, the efficiency of the parabolic dish collector can be enhanced.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Qiliang Wang, Honglun Yang, Mingke Hu, Jingyu Cao, Gang Pei, Hongxing Yang
Summary: This study analyzes the emissive heat loss around the parabolic trough solar receiver, proposes the concept of a negative thermal-flux region, and designs a new parabolic trough receiver with an inner radiation shield to reduce heat loss and enhance heat-collecting performance. This innovative approach shows great potential for breakthrough enhancement in the performance of parabolic trough collector systems.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Lan Xiao, Song He, Zu-Guo Shen, Shuang-Ying Wu, Zhi-Li Chen
Summary: The study built a numerical model to investigate the convective heat loss of a cylindrical receiver with built-in coiled tube, analyzing the variation of flow field and convective heat loss under different inclinations, wind directions, and wind velocities. The results indicated that the presence of a concentrator in a windy environment can significantly interfere with the air flow, affecting the convective heat loss of the receiver.
Article
Thermodynamics
V. Thirunavukkarasu, Vivek U. Nair, Kunal Tiwar, M. Cheralathan
Summary: Solar parabolic dish collectors are widely used for solar thermal energy conversion. However, cloud cover can result in short-time non-availability of solar radiation, affecting the efficiency. To tackle this issue, a receiver with short-term thermal energy storage was developed using a salt bath and copper tubes. Experimental results showed that the integration of the storage medium had a positive impact on thermal output, achieving an efficiency of 31.4% even under irregular radiation input conditions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
P. Ferrer, Khaled Mohamad, M. C. Cyulinyana, Victor Kaluba
Summary: In this article, design approaches to a receiver enclosed in an opaque cavity and heated by a solar parabolic trough collector are discussed. The optimization of the interaction between the cavity receiver and the solar radiation from a collector mirror is explored, which differs from conventional receivers and is essential for utilizing the benefits of using a cavity sleeve. Through simulations, different focal plane positions and the relative sizes of the receiver elements are investigated, and a focal plane close to the surface of the absorber pipe is found to have the highest efficiency at 62%. An experimental cavity receiver and parabolic trough system are then built based on the simulations, and the simulation results are validated against measured data with a maximum discrepancy of 8%. A novel method using the cooling behavior of the receiver is also applied to confirm the physical parameters through simulations.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Sourav Khanna, Sanjeev Newar, Vashi Sharma, K. S. Reddy, Tapas K. Mallick
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Green & Sustainable Science & Technology
K. S. Reddy, Sundarraj Nataraj
Article
Green & Sustainable Science & Technology
N. Premjit Singh, K. S. Reddy
Article
Thermodynamics
Sankaran Somasundharam, Kalvala Srinivas Reddy
Summary: This article discusses the estimation of spatially distributed thermal properties of two-dimensional heterogeneous media from the solution of the inverse heat conduction problem. Through experimental procedures and numerical estimations, it is found that the estimated thermal conductivity closely mimics the actual distribution even at an error level of +/- 0.1 K, indicating that this method can be directly used in thermal tomography applications.
HEAT TRANSFER ENGINEERING
(2021)
Article
Thermodynamics
Anandhi Parthiban, K. S. Reddy, Bala Pesala, T. K. Mallick
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Green & Sustainable Science & Technology
K. S. Reddy, C. Ananthsornaraj
Article
Energy & Fuels
P. Venkata Sai, K. S. Reddy
Article
Energy & Fuels
H. Sharon, K. S. Reddy, D. Krithika, Ligy Philip
Article
Energy & Fuels
S. Lokeswaran, Tapas K. Mallick, K. S. Reddy
Article
Multidisciplinary Sciences
Greg P. Smestad, Thomas A. Germer, Hameed Alrashidi, Eduardo F. Fernandez, Sumon Dey, Honey Brahma, Nabin Sarmah, Aritra Ghosh, Nazmi Sellami, Ibrahim A. I. Hassan, Mai Desouky, Amal Kasry, Bala Pesala, Senthilarasu Sundaram, Florencia Almonacid, K. S. Reddy, Tapas K. Mallick, Leonardo Micheli
SCIENTIFIC REPORTS
(2020)
Article
Thermodynamics
Bohra Nitin Kumar, K. S. Reddy
APPLIED THERMAL ENGINEERING
(2020)
Article
Energy & Fuels
Preeti Singh, Sourav Khanna, Sanjeev Newar, Vashi Sharma, K. Srinivas Reddy, Tapas K. Mallick, Victor Becerra, Jovana Radulovic, David Hutchinson, Rinat Khusainov
Article
Thermodynamics
Preeti Singh, Vijay Mudgal, Sourav Khanna, Tapas K. Mallick, K. S. Reddy
Article
Thermodynamics
Chandan, Sumon Dey, Paidisetty Sujan Kumar, K. S. Reddy, Bala Pesala
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
S. Jayachandran, K. S. Reddy
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2019)
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)