The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform

Mohd Afzanizam Mohd Rosli - One of the best experts on this subject based on the ideXlab platform.

  • Heat Removal Factor of an unglazed photovoltaic thermal collector with a serpentine tube
    2016
    Co-Authors: Mohd Afzanizam Mohd Rosli, Kamaruzzaman Sopian, Yusof M Sulaiman, Elias Salleh
    Abstract:

    Heat Removal Factor (F R ) is a vital parameter in determining the thermal efficiency of a photovoltaic thermal (PVT) system. As a main Factor of thermal performance, F R represents the ratio of the actual Heat transfer to the maximum yield of Heat transfer. In this study, F R of an unglazed PVT with serpentine tube collector was determined, with focus on the flat-plate thickness of the flat-plate serpentine tubes. Thermal modeling was used to estimate the overall Heat losses of the unglazed PVT. The highest F R value of 0.88 was obtained in the 0.015-m-thick flat plate, followed by 0.84 in the 0.010-m-thick flat plate. The difference in F R between the two designs was only 4.54 %, which can be considered within the acceptable range for the flat-plate thickness. This consideration was based on an economic point of view and the handling issues of PVT systems.

  • Thermal Performance on Unglazed Photovoltaic Thermal Polymer Collector
    Advanced Materials Research, 2014
    Co-Authors: Mohd Afzanizam Mohd Rosli, Kamaruzzaman Sopian, Elias Salleh, M. Y. Sulaiman, Mohd Khairul Anuar Sharif
    Abstract:

    In this study, the thermal efficiency of a polymer collector with unglazed photovoltaic thermal (PVT) system was determined. Overall Heat loss was estimated using the Heat energy balance method. Based on the analysis, the Heat Removal Factor of the PVT system was found to be 0.55. The thermal performance of the system was 47% during the zero reduce temperature. The unglazed PVT polymer collector could replace the conventional PVT collector, which encountered problems such as high cost, weighting issues, and corrosion.

  • parametric analysis on Heat Removal Factor for a flat plate solar collector of serpentine tube
    World applied sciences journal, 2014
    Co-Authors: Mohd Afzanizam Mohd Rosli, Suhaimi Misha, Kamaruzzaman Sopian, Yusof M Sulaiman
    Abstract:

    The photovoltaic thermal (PVT) is a device that can produce electric and thermal energies simultaneously. The main components of PVT consist of the photovoltaic module, absorber collector, insulator, and mounting frame. The design of the absorber collector is crucial in the good performance of thermal energy. The Heat Removal Factor FR, which is the ratio of the actual energy gain to the useful energy gain of a collecter when the entire collector surfaces are at the fluid inlet temperature, is one of the key parameters in determining the thermal efficiency of PVTs. A high FR means large thermal efficiency and losses and vice versa. In this study, the Heat Removal Factor of four serpentine tubes with varying dimensions and profiles is analyzed. The rectangle tube shows the highest FR (0.93). This high FR value could be caused by the small diameter of the rectangle tube. In addition, a high number of tubes enhance the Heat transfer between photovoltaic and serpentine collector absorber.

Jose Jasson Floresprieto - One of the best experts on this subject based on the ideXlab platform.

  • Heat Removal Factor in flat plate solar collectors indoor test method
    Energies, 2018
    Co-Authors: Orlando Montoyamarquez, Jose Jasson Floresprieto
    Abstract:

    This paper presents a couple of methods to evaluate the Heat Removal Factor F R of flat plate solar collectors, as well as a parametric study of the F R against the tilt angle β , and ( T i − T a )/ G , and its effects on the a 0 -Factor ( F R τα ) and the a 1 -Factor ( F R U Lmin ). The proposed methods were based on indoor flow calorimetry. The first method considers the ratio of the actual useful Heat to the maximum useful Heat. The second takes into account the slopes of the family of efficiency curves ( F R U Lmin ) according to ANSI/ASHRAE 93-2010, and the minimum overall Heat loss coefficient, U Lmin . In both methods, a feedback temperature control at collector inclinations from horizontal to vertical allows the inlet temperature and the emulating of the solar radiation to be established by electrical Heating. The performance of the methods was determined in terms of the uncertainty of the F R . Method 1 allowed a three-fold improved precision compared to Method 2; however, this implied a more detailed experimental setup. According to the first method, the effects of the tilt angle β , and the ( Ti − Ta )/ G , on the a 0 -Factor were considerable, since F R is directly proportional to the a 0 -Factor. The changes in ( Ti − Ta )/ G caused an average change in F R of 32% The F R shows almost linear behavior for inclinations from horizontal to vertical with a 14.5% change. The effects of β on the a 1 -Factor were not considerable, due to the compensation between the increase in F R and the decrease in U Lmin as β increased.

Nasrudin Abd Rahim - One of the best experts on this subject based on the ideXlab platform.

  • Recent advancement in Heat pipe for stationary solar collectors
    5th IET International Conference on Clean Energy and Technology (CEAT2018), 2018
    Co-Authors: K. Chopra, V. V Tyagi, Prajjwal Gupta, Jeyraj Selvaraj, Nasrudin Abd Rahim
    Abstract:

    The increasing demand of energy can meet out through renewable source of energy. Hence it is necessary to focus on sustainable energy source. The solar energy is the prime source of energy, most available, eco-friendly and renewable to sustain the increasing energy demand. The solar energy is collected either through thermal based collectors or solar PV collectors. Moreover, Heat pipe based solar collector is the most promising technology for various applications. Heat pipe is an advanced technology which has been proven to show higher thermal performance of solar collectors compared to conventional solar collectors. Due to high thermal performance, Heat pipes becoming popular as passive energy transfer technology. This article lays out the comprehensive review of integration of Heat pipe with stationary solar collectors. This manuscript comprised of mainly two parts: classification of Heat pipes and Heat pipes for stationary collectors. First part provides the information of types of Heat pipes used for different applications and purpose followed by progress and development of Heat pipes used in flat plate solar collector, evacuated tube solar collector and solar PV collector. Also, further studies are recommended for investigating the Heat pipe in solar collectors by considering the economic issues. In addition to this major issues in Heat pipe stationary collectors such as low Heat Removal Factor (when less than ten Heat pipes used in stationary collector), Increase complexity in design and small surface area of condenser are also discussed.

  • Modelling and analysis of the effect of different parameters on a parabolic-trough concentrating solar system
    RSC Advances, 2015
    Co-Authors: M. K. Islam, Hasanuzzaman, Nasrudin Abd Rahim
    Abstract:

    Concentrating solar power technologies are potential energy-harvesting systems. This paper simulates and analyzes the design of a parabolic-trough concentrating solar system. Optimum measurements are sought for the receiver, and collector performance is investigated using three Heat transfer fluids, namely, ammonia, nitrogen, and carbon dioxide. Receiver parameters are optimized to achieve the maximum thermal efficiency of the collector. The concentration ratio, collector aperture area, and mass flow rate of the fluids significantly influenced the collector's efficiency and the Heat Removal Factor.

Orlando Montoyamarquez - One of the best experts on this subject based on the ideXlab platform.

  • Heat Removal Factor in flat plate solar collectors indoor test method
    Energies, 2018
    Co-Authors: Orlando Montoyamarquez, Jose Jasson Floresprieto
    Abstract:

    This paper presents a couple of methods to evaluate the Heat Removal Factor F R of flat plate solar collectors, as well as a parametric study of the F R against the tilt angle β , and ( T i − T a )/ G , and its effects on the a 0 -Factor ( F R τα ) and the a 1 -Factor ( F R U Lmin ). The proposed methods were based on indoor flow calorimetry. The first method considers the ratio of the actual useful Heat to the maximum useful Heat. The second takes into account the slopes of the family of efficiency curves ( F R U Lmin ) according to ANSI/ASHRAE 93-2010, and the minimum overall Heat loss coefficient, U Lmin . In both methods, a feedback temperature control at collector inclinations from horizontal to vertical allows the inlet temperature and the emulating of the solar radiation to be established by electrical Heating. The performance of the methods was determined in terms of the uncertainty of the F R . Method 1 allowed a three-fold improved precision compared to Method 2; however, this implied a more detailed experimental setup. According to the first method, the effects of the tilt angle β , and the ( Ti − Ta )/ G , on the a 0 -Factor were considerable, since F R is directly proportional to the a 0 -Factor. The changes in ( Ti − Ta )/ G caused an average change in F R of 32% The F R shows almost linear behavior for inclinations from horizontal to vertical with a 14.5% change. The effects of β on the a 1 -Factor were not considerable, due to the compensation between the increase in F R and the decrease in U Lmin as β increased.

Elias Salleh - One of the best experts on this subject based on the ideXlab platform.

  • Heat Removal Factor of an unglazed photovoltaic thermal collector with a serpentine tube
    2016
    Co-Authors: Mohd Afzanizam Mohd Rosli, Kamaruzzaman Sopian, Yusof M Sulaiman, Elias Salleh
    Abstract:

    Heat Removal Factor (F R ) is a vital parameter in determining the thermal efficiency of a photovoltaic thermal (PVT) system. As a main Factor of thermal performance, F R represents the ratio of the actual Heat transfer to the maximum yield of Heat transfer. In this study, F R of an unglazed PVT with serpentine tube collector was determined, with focus on the flat-plate thickness of the flat-plate serpentine tubes. Thermal modeling was used to estimate the overall Heat losses of the unglazed PVT. The highest F R value of 0.88 was obtained in the 0.015-m-thick flat plate, followed by 0.84 in the 0.010-m-thick flat plate. The difference in F R between the two designs was only 4.54 %, which can be considered within the acceptable range for the flat-plate thickness. This consideration was based on an economic point of view and the handling issues of PVT systems.

  • Thermal Performance on Unglazed Photovoltaic Thermal Polymer Collector
    Advanced Materials Research, 2014
    Co-Authors: Mohd Afzanizam Mohd Rosli, Kamaruzzaman Sopian, Elias Salleh, M. Y. Sulaiman, Mohd Khairul Anuar Sharif
    Abstract:

    In this study, the thermal efficiency of a polymer collector with unglazed photovoltaic thermal (PVT) system was determined. Overall Heat loss was estimated using the Heat energy balance method. Based on the analysis, the Heat Removal Factor of the PVT system was found to be 0.55. The thermal performance of the system was 47% during the zero reduce temperature. The unglazed PVT polymer collector could replace the conventional PVT collector, which encountered problems such as high cost, weighting issues, and corrosion.