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R S Adhikari - One of the best experts on this subject based on the ideXlab platform.

  • Studies on Cost Effectiveness of Hybrid Photovoltaic/Thermal (PV/T) Air Heating Collector
    World Renewable Energy Congress VI, 2000
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    Publisher Summary This chapter discusses the studies on cost effectiveness of hybrid photovoltaic /thermal air Heating Collector. This chapter a techno-economic analysis of a single hybrid PV/T air Heating Collector. Various energy balance equations have been developed for evaluating the useful thermal and electrical energy gain. The economic analysis takes in to account the capital costs, maintenance costs, operating costs, useful life of the system, interest rate etc. Numerical calculations have been made to optimize different design parameters for a given system and climatic parameters. Among various application of solar energy, hybrid photovoltaic/thermal (PV/T) energy conversion is relatively new and promising technology for the production of both thermal and electrical energy simultaneously. The chapter also presents a techno-economic analysis for a hybrid P V/T air Heating Collector. The economic analysis takes in to account the capital costs, maintenance costs, operating costs, useful life of the system and interest rate etc. Numerical calculations have been made to optimize different design parameters, for example, Collector length, duct depth, solar cell area etc. for a given system and climatic parameters. The study is limited to cost effectiveness studies on single glass cover photovoltaic or thermal air Heating Collector, which supplies hot air and electricity directly.

  • System performance studies on a photovoltaic/thermal (PV/T) air Heating Collector
    Renewable Energy, 1999
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    A computer simulation model is presented for the analysis of a solar photovoltaic/thermal (PV/T) hybrid Collector with air as heat transfer fluid and algorithm for making quantitative prediction regarding the performance of the system is described. Thermal efficiency curves for the solar PV/T hybrid Collectors corresponding to various type of absorbers have been derived. In order to appreciate the model, numerical calculations have been made for evaluating the system performance corresponding to typical climate of Delhi, India

  • system performance studies on a photovoltaic thermal pv t air Heating Collector
    Renewable Energy, 1999
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    Abstract A computer simulation model is presented for the analysis of a solar photovoltaic/thermal (PV/T) hybrid Collector with air as heat transfer fluid and algorithm for making quantitative prediction regarding the performance of the system is described. Thermal efficiency curves for the solar PV/T hybrid Collectors corresponding to various type of absorbers have been derived. In order to appreciate the model, numerical calculations have been made for evaluating the system performance corresponding to typical climate of Delhi, India

  • Transient simulation of conventional hybrid photovoltaic/thermal (PV/T) air Heating Collectors
    International Journal of Energy Research, 1998
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    In the present investigation, the authors have developed a computer simulation model for predicting the transient performance of a conventional photovoltaic/thermal (PV/T) air Heating Collector with single- and double-glass configurations. In order to appreciate the model, numerical calculations have been made to evaluate the system performance corresponding to typical climate of Delhi, India. It has been observed that the hybrid PV/T systems are interesting in respect to system efficiencies, however, their adaptability in future must be weighed in terms of cost effectiveness of these systems. © 1998 John Wiley & Sons, Ltd.

  • conventional hybrid photovoltaic thermal pv t air Heating Collectors steady state simulation
    Renewable Energy, 1997
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    This investigation is concerned with the performance analysis of a conventional hybrid photovoltaic/thermal air Heating Collector. A simulation model is developed and various performance parameters are calculated for single-glass and double-glass configurations. Results are presented to show the effect of various design and operational parameters on the performance of a system. These results are useful for designing such systems more scientifically. However, final selection of design and operational variables must be based on the cost-effectiveness of the system.

H P Garg - One of the best experts on this subject based on the ideXlab platform.

  • Studies on Cost Effectiveness of Hybrid Photovoltaic/Thermal (PV/T) Air Heating Collector
    World Renewable Energy Congress VI, 2000
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    Publisher Summary This chapter discusses the studies on cost effectiveness of hybrid photovoltaic /thermal air Heating Collector. This chapter a techno-economic analysis of a single hybrid PV/T air Heating Collector. Various energy balance equations have been developed for evaluating the useful thermal and electrical energy gain. The economic analysis takes in to account the capital costs, maintenance costs, operating costs, useful life of the system, interest rate etc. Numerical calculations have been made to optimize different design parameters for a given system and climatic parameters. Among various application of solar energy, hybrid photovoltaic/thermal (PV/T) energy conversion is relatively new and promising technology for the production of both thermal and electrical energy simultaneously. The chapter also presents a techno-economic analysis for a hybrid P V/T air Heating Collector. The economic analysis takes in to account the capital costs, maintenance costs, operating costs, useful life of the system and interest rate etc. Numerical calculations have been made to optimize different design parameters, for example, Collector length, duct depth, solar cell area etc. for a given system and climatic parameters. The study is limited to cost effectiveness studies on single glass cover photovoltaic or thermal air Heating Collector, which supplies hot air and electricity directly.

  • performance analysis of a hybrid photovoltaic thermal pv t Collector with integrated cpc troughs
    International Journal of Energy Research, 1999
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    In the present investigation a theoretical analysis has been presented for the modelling of thermal and electrical processes of a hybrid PV/T air Heating Collector coupled with a compound parabolic concentrator (CPC). In this design, several CPC troughs are combined in a single PV/T Collector panel. The absorber of the hybrid PV/T Collector under investigation consists of an array of solar cells for generation of electricity, while Collector fluid circulating past the absorber provides useful thermal energy as in a conventional flat plate Collector. In the analysis, it is assumed that solar cell efficiency can be represented by a linear decreasing function of its temperature. Energy balance equations have been developed for the various components of the system. Based on the developed analysis, both thermal and electrical performance of the system as a function of system design parameters are presented and discussed. Results have been presented to compare the performance of hybrid PV/T Collector coupled with and without CPC. Copyright © 1999 John Wiley & Sons, Ltd.

  • System performance studies on a photovoltaic/thermal (PV/T) air Heating Collector
    Renewable Energy, 1999
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    A computer simulation model is presented for the analysis of a solar photovoltaic/thermal (PV/T) hybrid Collector with air as heat transfer fluid and algorithm for making quantitative prediction regarding the performance of the system is described. Thermal efficiency curves for the solar PV/T hybrid Collectors corresponding to various type of absorbers have been derived. In order to appreciate the model, numerical calculations have been made for evaluating the system performance corresponding to typical climate of Delhi, India

  • system performance studies on a photovoltaic thermal pv t air Heating Collector
    Renewable Energy, 1999
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    Abstract A computer simulation model is presented for the analysis of a solar photovoltaic/thermal (PV/T) hybrid Collector with air as heat transfer fluid and algorithm for making quantitative prediction regarding the performance of the system is described. Thermal efficiency curves for the solar PV/T hybrid Collectors corresponding to various type of absorbers have been derived. In order to appreciate the model, numerical calculations have been made for evaluating the system performance corresponding to typical climate of Delhi, India

  • Transient simulation of conventional hybrid photovoltaic/thermal (PV/T) air Heating Collectors
    International Journal of Energy Research, 1998
    Co-Authors: H P Garg, R S Adhikari
    Abstract:

    In the present investigation, the authors have developed a computer simulation model for predicting the transient performance of a conventional photovoltaic/thermal (PV/T) air Heating Collector with single- and double-glass configurations. In order to appreciate the model, numerical calculations have been made to evaluate the system performance corresponding to typical climate of Delhi, India. It has been observed that the hybrid PV/T systems are interesting in respect to system efficiencies, however, their adaptability in future must be weighed in terms of cost effectiveness of these systems. © 1998 John Wiley & Sons, Ltd.

Bidyut Baran Saha - One of the best experts on this subject based on the ideXlab platform.

  • thermal performance study of a multi pass solar air Heating Collector system for drying of roselle hibiscus sabdariffa
    Renewable Energy, 2017
    Co-Authors: M. W. Kareem, Khairul Habib, Bidyut Baran Saha, Mohd Hafidz Ruslan
    Abstract:

    Abstract This article presents a study on the performance of a forced convective multi-pass solar air Heating Collector (MPSAHC) system assisted with granite as a sensible energy storing matrix. Experimental drying of Roselle was carried out in August 2015 at Solar Energy Research Site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203 S). The present investigation was conducted under the daily average relative humidity, solar irradiance, ambient temperature and wind speed of 64.5%, 635.49 Wm−2, 32.24 °C, and 0.81 ms−1, respectively. An average drying rate of 33.57 g (kg m2 h)−1 was achieved while the system optical efficiency, Collector efficiency, drying efficiency and moisture pickup efficiency of 70.53%, 64.08%, 36.22% and 66.95% were obtained, respectively. MPSAHC dryer was 21 h faster with fair color retention when compared to open sun drying approach (OSDA) that was conducted together under the same weather condition. Techno economic analysis reflected a payback period of 2.14 years. However, drying efficiency could be improved if the inlet air humidity can be controlled to favor drying operation.

  • Performance analysis of a multi-pass solar thermal Collector system under transient state assisted by porous media
    Solar Energy, 2017
    Co-Authors: M. W. Kareem, Khairul Habib, Kashif Irshad, S.i. Gilani, Bidyut Baran Saha
    Abstract:

    Abstract An enhanced forced convective multi-pass solar air Heating Collector (MPSAHC) system aided with granite pebble bed has been investigated in this present article. The air Heating Collector system was tested in the outdoor solar research site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203° E). Transport pipe for movement of heated air around the system was eliminated in the design of the MPSAHC facility to minimise the thermal losses, pressure drop and the pumping cost of the hot air in the control volume. The daily ambient temperature and relative humidity range recorded during the repeated tests are 21.09–36.64 °C and 48.04–87.9%, respectively. The Collector unit achieved a peak temperature of 80.29 °C while the optimum system air mass flow rate of 0.016 kgs −1 was applied. Despite high relative humidity of the environment, the stream of ambient air was heated to 48.53 °C, 57.75 °C and 71.19 °C at different positions in the MPSAHC which correspond to single pass, double pass and multi-pass effects, respectively. The porous matrix exhibited slow energy discharge at night time with air temperature difference of 14.27 °C at 18:00 h to 4.54 °C at 24:00 h over environmental air temperature. MPSAHC system delivered specific energy demand (SED) of 11.51 kWh kg −1 while the maximum thermal Collector and daily average transient Collector efficiencies of 72.59% and 36.38% were achieved, respectively. A good agreement has been established between reported studies and the present investigation. Although continuity of system operation at night was achieved using porous matrix but improvement is still needed to optimise the system performance.

W He - One of the best experts on this subject based on the ideXlab platform.

  • a numerical and experimental study of a dual function solar Collector integrated with building in passive space Heating mode
    Chinese Science Bulletin, 2010
    Co-Authors: Jie Ji, W He
    Abstract:

    A newly designed solar Collector named dual-function solar Collector is proposed. The dual-function solar Collector integrated with building can perform in two different modes: working as a passive space Heating Collector in cold sunny days such as in winter, or working as a facade water Heating Collector in hot days such as in summer. An experimental study has been carried out to investigate the performance of the novel system in space Heating mode, whilst, the dynamic numerical model has been established and validated. The experimental and numerical results show that during the period of the measurement from 9:00 to 17:00, the mean indoor temperature was up to 24.7°C while the mean ambient temperature was only 4.8°C, and a temperature stratification was present in the room. Moreover, a numerical study on the effect of optical property of coatings has been carried out.

  • effect of fluid flow and packing factor on energy performance of a wall mounted hybrid photovoltaic water Heating Collector system
    Energy and Buildings, 2006
    Co-Authors: Jie Ji, Hua Yi, Jianping Lu, T T Chow, W He
    Abstract:

    Abstract Facade-integrated photovoltaic/thermal (BiPV/T) technology is a relatively new concept in improving the overall energy performance of PV installations in buildings. With the use of wall-mounted water-type PV/T Collectors, the system not only generates electricity and hot water simultaneously, but also improves the thermal insulation of the building envelope. A numerical model of this hybrid system was developed by modifying the Hottel–Whillier model, which was originally for the thermal analysis of flat-plate solar thermal Collectors. Computer simulation was performed to analyze the system performance. The combined effects of the solar cell packing factor and the water mass flow rate on the thermal and electrical efficiencies were investigated. The simulation results indicated that an optimum water mass flow rate existed in the system through which the desirable integrated energy performance can be achieved.

M. W. Kareem - One of the best experts on this subject based on the ideXlab platform.

  • thermal performance study of a multi pass solar air Heating Collector system for drying of roselle hibiscus sabdariffa
    Renewable Energy, 2017
    Co-Authors: M. W. Kareem, Khairul Habib, Bidyut Baran Saha, Mohd Hafidz Ruslan
    Abstract:

    Abstract This article presents a study on the performance of a forced convective multi-pass solar air Heating Collector (MPSAHC) system assisted with granite as a sensible energy storing matrix. Experimental drying of Roselle was carried out in August 2015 at Solar Energy Research Site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203 S). The present investigation was conducted under the daily average relative humidity, solar irradiance, ambient temperature and wind speed of 64.5%, 635.49 Wm−2, 32.24 °C, and 0.81 ms−1, respectively. An average drying rate of 33.57 g (kg m2 h)−1 was achieved while the system optical efficiency, Collector efficiency, drying efficiency and moisture pickup efficiency of 70.53%, 64.08%, 36.22% and 66.95% were obtained, respectively. MPSAHC dryer was 21 h faster with fair color retention when compared to open sun drying approach (OSDA) that was conducted together under the same weather condition. Techno economic analysis reflected a payback period of 2.14 years. However, drying efficiency could be improved if the inlet air humidity can be controlled to favor drying operation.

  • multi pass solar air Heating Collector system for drying of screw pine leaf pandanus tectorius
    Renewable Energy, 2017
    Co-Authors: M. W. Kareem, Khairul Habib, Kamaruzzaman Sopian, Mohd Hafidz Ruslan
    Abstract:

    An experimental investigation of solar drying of screw-pine leaf has been conducted in the open space of the solar research site, Universiti Teknologi PETRONAS Malaysia (4.385693° N, 100.979203° E). Screw-pine leaf has been used for handcraft in many villages in Asia and Africa. A transient state lumped element analysis was developed to determine the thermal performance of the multi-pass solar Collector system (MSCS) in accordance with ASHRAE standards. The facility was assessed under the average daily solar irradiance of 412.6 Wm−2 and ambient temperature of 30 °C over an air mass flow rate range from 0.010 kgs−1 to 0.032 kgs−1. Drying kinetics profiles of screw-pine have been obtained and an improved range from 22% to 26% of instantaneous thermal Collector efficiency has been recorded over the double pass Collector system (DPCS) while thermal energy storage has contributed 5–8% to system performance. MSCS performance has been determined and achieved the thermal Collector, pickup, drying and exergy efficiencies of 58.73%, 66.95%, 36.04% and 27.23–86.82%, respectively. The level of risk on the investment in MSCS has been measured using economic indices to obtain a payback period of 0.75 year. The thermal loss through conventional Collector back plate has been prevented by integration of Collector unit and the drying cabinet of the system. There is still need to further improve the system performance efficiency through enhanced energy saving innovation technique.

  • Performance analysis of a multi-pass solar thermal Collector system under transient state assisted by porous media
    Solar Energy, 2017
    Co-Authors: M. W. Kareem, Khairul Habib, Kashif Irshad, S.i. Gilani, Bidyut Baran Saha
    Abstract:

    Abstract An enhanced forced convective multi-pass solar air Heating Collector (MPSAHC) system aided with granite pebble bed has been investigated in this present article. The air Heating Collector system was tested in the outdoor solar research site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203° E). Transport pipe for movement of heated air around the system was eliminated in the design of the MPSAHC facility to minimise the thermal losses, pressure drop and the pumping cost of the hot air in the control volume. The daily ambient temperature and relative humidity range recorded during the repeated tests are 21.09–36.64 °C and 48.04–87.9%, respectively. The Collector unit achieved a peak temperature of 80.29 °C while the optimum system air mass flow rate of 0.016 kgs −1 was applied. Despite high relative humidity of the environment, the stream of ambient air was heated to 48.53 °C, 57.75 °C and 71.19 °C at different positions in the MPSAHC which correspond to single pass, double pass and multi-pass effects, respectively. The porous matrix exhibited slow energy discharge at night time with air temperature difference of 14.27 °C at 18:00 h to 4.54 °C at 24:00 h over environmental air temperature. MPSAHC system delivered specific energy demand (SED) of 11.51 kWh kg −1 while the maximum thermal Collector and daily average transient Collector efficiencies of 72.59% and 36.38% were achieved, respectively. A good agreement has been established between reported studies and the present investigation. Although continuity of system operation at night was achieved using porous matrix but improvement is still needed to optimise the system performance.

  • Performance Evaluation of a Novel Multi-pass Solar Air Heating Collector
    Procedia Engineering, 2016
    Co-Authors: M. W. Kareem, Khairul Habib, Kamaruzzaman Sopian, Kashif Irshad
    Abstract:

    Abstract In this present investigation, the performance of a new solar air Heating Collector of multi-pass mode is presented. The solar air Heating system is theoretically modelled by applying energy balance expressions to reflect the network of convection and radiation heat flows. The theoretical analysis of the active air heater is supported by SIMSCAPE TM numerical tool while the proposed multi-pass solar Collector system was tested under the meteorological condition of Seri Iskandar, Malaysia (4.385693 o N and 100.979203 o E). These techniques were used to audit the solar energy balance of the solar dryer system. The performance indices of the drying system were evaluated and the system thermodynamic correlations were obtained. Daily maximum temperature gradient between ambient and the system Collector was 30.42 o C. The thermal Collector efficiency and optical efficiency were 59.96% and 72.26%, respectively. Improvement on system thermal delivery by the sensible porous matrix of 9.37% was achieved. The predicted performance level was compared with the test result and a relatively fair agreement was obtained. However, the instantaneous thermodynamic properties of air at the system boundary need to be defined to accomplish better accuracy on the relevant correlations.