Improvement Potential and Exergy Analyses of Photovoltaic Thermal with and without ∇-absorber Collector

The combination of a solar thermal and photovoltaic system is called photovoltaic thermal system (PVT). The PVT system with and without -absorber has been intended to harvest both hot air and electricity. The hot air that is produced is used in the cooling process of the photovoltaic panel and then to improve the efficiency of the photovoltaic panel. The experimental investigation was conducted at the mass flow rate from 0.0069 kg/s to 0.0491 kg/s and solar radiation of 522 W/m2 and 820 W/m2 in the National University of Malaysia. The using -absorber collector increases exergy and exergy efficiency of PVT system. The improvement potential comparatively upsurges with cumulative the mass flow rate.

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Effect analysis of the different channel length and depth of photovoltaic thermal system with ∇-groove collector

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v10i2.pp1200-1207 ◽

2020 ◽

Vol 10 (2) ◽

pp. 1200

Author(s):

Saprizal Hadisaputra ◽

Muhammad Zohri ◽

Bahtiar Bahtiar ◽

Ahmad Fudholi

Keyword(s):

Mass Flow Rate ◽

Mass Flow ◽

Flow Rate ◽

Energy Balance Equation ◽

Channel Length ◽

Electrical Performance ◽

Effect Analysis ◽

Photovoltaic Thermal System ◽

The Matrix ◽

Solar Intensity

The converted Solar energy as electrical and thermal energy was named photovoltaic thermal (PVT). The aim of this study is to the analysis of different length and depth channel effect of photovoltaic thermal with ∇-groove collector by a mathematical model. The matrix inversion was used to analyze the energy balance equation. Simulation results were conducted below the solar intensity of 800 W/m2 and mass flow rate between 0.0069 kg/s and 0.0491 kg/s. Electrical and thermal efficiency was done to assess the effect of different length and channel depth of PVT system with ∇-groove collector. The effect of different length and depth of ∇-groove collector for electrical and thermal performance is caused by changed mass flow rate. The effect Increasing of the mass flow rate of collector increased the thermal and electrical performance of the ∇-groove collector.

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Mathematical Modelling and Performance Analysis of Flat Plate Solar Dryer- CFD Simulation Approach

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v9i1.172-180.3786 ◽

2021 ◽

Vol 9 (1) ◽

pp. 172-180

Author(s):

Debela Geneti Desisa

Keyword(s):

Mass Flow Rate ◽

Mass Flow ◽

Flow Rate ◽

Thermal Efficiency ◽

Cfd Simulation ◽

Hot Air ◽

Lower Temperature Range ◽

High Turbulence ◽

And Performance ◽

Lower Temperature

This study focuses on the investigation of enhancing convective heat transfer between the absorber and the air inside a channel. The investigation approaches modeling different absorber through CFD simulation and validating the result with experimental data. Supplying air to both sides of the top and the bottom surfaces of the absorber increase the air mass flow rate and therefore increases the thermal efficiency of the dryer. The studies in a V-grooved absorber attain high hot air velocity; high thermal efficiency resulted from high turbulence created in the duct. For the sample taken with a flow range, 0.01kg/s to 0.06 kg/s, the high output temperature was observed in a lower temperature range and increases as the flow rate increases. At a flow rate 0.01 kg/s, the velocity of hot air passing over the V-grooved absorber attain 0.28 m/s and increased to 1.4 m/s as the mass flow rate increased to 0.06 kg/s. For the rectangular absorber, the velocity of hot air attains 0.15 m/s at a flow rate of 0.01 kg/s and increased to 1.46 m/s as the mass flow rate increases to 0.06 kg/s. The double-sided V-grooved absorber contributes 8 – 12.40% value more efficiency compared to the rectangular plate with the same flow orientation. Further investigation is recommended taking the quantitative analysis obtained in this study and generating qualitative data.

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Techno-Economic evaluation of an evacuated tube solar air collector with inserted baffles

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1177/0954408921989847 ◽

2021 ◽

pp. 095440892198984

Author(s):

A Veera Kumar ◽

TV Arjunan ◽

D Seenivasan ◽

R Venkatramanan ◽

S Vijayan

Keyword(s):

Mass Flow Rate ◽

Mass Flow ◽

Flow Rate ◽

Medium Temperature ◽

Clear Sky ◽

Hot Air ◽

Solar Air Collector ◽

Process Heating ◽

The Cost ◽

Evacuated Tube

Evacuated tube solar collectors exhibit excellent performance even in poor insolation periods and are highly preferred for low as well as for medium temperature applications. In this study, an evacuated tube with inserted baffle solar air collector (ETIBSAC) was developed to investigate the effect of mass flow rate of air on energy, exergy, enviro-economic characteristics. The results revealed that the maximum outlet air temperature was observed during the peak irradiance period as 80.5 °C and the system is capable of delivering hot air above 50 °C between 9:30 am to 4:00 pm in clear sky days at the mass flow rate 100 kg/h. The maximum thermal efficiency of 55.4% was achieved at the mass flow rate of 500 kg/h. The highest exergy efficiency of 2.7% was recorded at 100 kg/h and diminishes with increasing mass flow rate of air due to more exergy destruction. The cost per kWh to deliver the hot air in the range of 60 to 70 °C is estimated as 0.00027 $(0.02 INR) at the mass flow rate of 100 kg/h. It is concluded that the developed air collector can be efficiently used for process heating applications.

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Experimental Study of Photovoltaic Thermal-Thermoelectric (PVT-TE) Air Collector

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v9.i3.pp1390-1396 ◽

2018 ◽

Vol 9 (3) ◽

pp. 1390

Author(s):

Nurul Syakirah Nazri ◽

Ahmad Fudholi ◽

Mohd Hafidz Ruslan ◽

Kamaruzzaman Sopian

Keyword(s):

Experimental Study ◽

Energy Efficiency ◽

Mass Flow Rate ◽

Hybrid System ◽

Mass Flow ◽

Flow Rate ◽

Experimental Studies ◽

Plate Temperature ◽

System Effect ◽

Photovoltaic Panel

In this study, an experimental study has been conducted to determine the performance of the photovoltaic thermal- thermoelectric air collector (PVT-TE) hybrid system. Hybrid system consists of photovoltaic panel (PV) and thermoelectric modules (TEs) that can improve the energy efficiency of the system. The results of output temperature (To) and plate temperature (Tp) obtained from the experiment have been used to determine the performance of this hybrid system. Effect of mass flow rate and radiation intensity is also being investigated. Experimental studies were carried out at 0.02 kg/s and 0.09 kg/s which represent minimum and maximum of mass flow rate, and radiation intensities in the range of 268-922 W/m2.

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