Article
Energy & Fuels
A. Allouhi, M. Benzakour Amine
Summary: This study aims to characterize the performance of a heat pipe flat plate solar collector using different nanofluids, with CuO-based nanofluid showing the highest enhancements in energetic and exergetic efficiencies. The decrease in specific heat of nanofluids is identified as the main thermal property responsible for performance improvement.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Thermodynamics
Evangelos Bellos, Christos Tzivanidis
Summary: This study investigates the performance of an efficient evacuated flat plate collector and develops a correlation for the daily useful output. The results show that the optimum exergy efficiency is 13.33% at an operating temperature of 125 degrees C, with a corresponding thermal efficiency of 47.24%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Javed Sikandar Shaikh, Saleel Ismail
Summary: This paper presents a theoretical investigation of a solar-powered humidification-dehumidification desalination system in Kozhikode, India. The study explores the influence of various parameters on the system's performance and estimates the cost of freshwater production.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Maryam Fallah Najafabadi, Hossein Talebi Rostami, Mousa Farhadi
Summary: In this study, a twisted double-pipe heat exchanger with phase change material was designed for energy storage in solar collectors. Various parameters such as pipe position, twisting, and cross-section were investigated for their effects on PCM melting in the storage unit. The findings showed that vertical heat exchangers are less efficient than horizontal ones, and a three-lobed cross-section enhances PCM melting.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Latif Aref, Rasoul Fallahzadeh, Seyed Reza Shabanian, Mojtaba Hosseinzadeh
Summary: The study aims to increase the thermal efficiency of a flat plate closed-loop pulsating heat pipe solar collector by introducing a novel closed-loop pulsating heat pipe (CLPHP) with a dual-diameter structure. Experimental results show that the thermal performance of the dual-diameter configuration is considerably better than the single-diameter in different inclination angles, achieving a thermal efficiency of 72.4% under sunny weather conditions.
Article
Environmental Sciences
Noushin Azimy, Mohammad Reza Saffarian, Aminreza Noghrehabadi
Summary: This research aims to increase the heat transfer efficiency of flat-plate solar collectors by designing the collector pipe in a zigzag shape. Through a 3D coupled investigation and analysis of fly ash-Cu/water hybrid nanofluids, the study found that the zigzag pipe design improves thermal efficiency compared to conventional straight pipes. Additionally, increasing mass flow rate, temperature, and irradiation leads to higher Nusselt numbers.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Omer Faruk Guler, Ozan Sen, Ceyhun Yilmaz, Mehmet Kanoglu
Summary: This study models and analyzes the performance of a geothermal and solar-based multigeneration system, comparing it with alternative case studies. Three different models are developed, each using a different method to transfer heat energy. The study also considers the integration of a hydrogen production system to store excess energy. The models are investigated using geothermal and solar data from Afyonkarahisar in Turkey. The results show variations in exergy efficiencies and costs among the different models.
Article
Thermodynamics
Do Huu-Quan, Ali Mohammad Rostami, Mozafar Shokri Rad, Mohsen Izadi, Ahmad Hajjar, Qingang Xiong
Summary: This study focused on the convective heat transfer characteristics inside novel double-pipe heat exchangers with flat inner pipes, and found that the effects of inner pipe geometry heavily depend on the Reynolds number. Using flat inner pipes with small aspect ratio is beneficial for overall heat transfer at low Reynolds numbers, while circular inner pipes outperform at high Reynolds numbers.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Ambarish Maji, Tuhin Deshamukhya, Gautam Choubey
Summary: In this study, four flat-plate solar collectors with similar dimensions were simulated using CFD approach. The effect of channel geometry on the collector's performance was investigated, and it was found that model 3 performed the best when the number of turns was maximum.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Thermodynamics
Salman Al Zahrani, Mohammad S. Islam, Suvash C. Saha
Summary: The study aims to improve the thermal performance of flat plate heat exchangers by introducing two newly developed modified versions. Experimental and numerical analyses show that FPHEm2 outperforms its counterparts, reducing pressure drop and enhancing heat transfer rate. This suggests that FPHEm2 could be a viable replacement for traditional flat plate heat exchangers.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Salman Al Zahrani, Mohammad S. Islam, Suvash C. Saha
Summary: This study aims to enhance the thermal performance of the basic plate heat exchanger (FPHE) by proposing a new flow arrangement. Computational fluid dynamics simulations show that the modified FPHE has significantly higher Nusselt number and friction factor compared to the basic FPHE.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Environmental Sciences
Shiva Singh, Kuwar Mausam, Subrata Kumar Ghosh, Arun Kumar Tiwari
Summary: The study investigates the thermal performance of a solar flat plate collector using water and Cu-MWCNTs nanoparticle-based hybrid nanofluid through experimental and numerical approaches. X-ray diffraction and FESEM with EDAX mapping were used to characterize the nanoparticles. The experimental setup examined various parameters such as flow rates, inclination angle, volume concentration, and intensity, while a 3D numerical model was developed to simulate the collector's performance. The results showed improved efficiency and validated the use of numerical simulations to observe temperature and flow patterns in flat plate collectors with nanofluids.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Hassan Hajabdollahi
Summary: A new solar air heater system with liquid solar thermal collector integrated with fin and tube heat exchanger is proposed and optimized for maximum heat transfer efficiency. The study found that the ratio of air to water mass flow rates varies with the rate of heat transfer.
Article
Thermodynamics
Kishor Deshmukh, Suhas Karmare, Pradeep Patil
Summary: The convective heat transfer performance of U-pipe evacuated tube solar thermal collector with TiN nanofluid was investigated in this study. TiN nanoparticles with sizes of 40-50 nm were dispersed in distilled water at different volume concentrations. The stability and thermophysical properties of TiN nanofluid were experimentally measured. The experimental investigation included the convective heat transfer coefficient, friction factor characteristic, and solar thermal efficiency at different volume concentrations and mass flow rates. The performance of the solar thermal collector was tested under outdoor conditions. A correlation was proposed to determine the Nusselt number, friction factor, and solar thermal efficiency in laminar flow. The TiN nanofluid was recommended for industrial solar thermal applications due to its notable improvement in convective heat transfer performance despite the friction factor penalty.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yan Jiang, Huan Zhang, Shijun You, Man Fan, Yaran Wang, Zhangxiang Wu
Summary: Research on applying an automatic movable cover plate to improve the performance of flat plate solar collectors can reduce heat loss, prevent overheating, and enhance the operational efficiency of the collectors in various environments.
APPLIED THERMAL ENGINEERING
(2021)
