Jayanta Mondol
University of Ulster, School of the Built Environment, Faculty Member
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An experiment was conducted to test the optical efficiency of the lenses of the Concentrating Photovoltaic Glazing (CoPVG) concept. The CoPVG is a seasonal glazing system consisting of longitudinal prismatic lenses. The lenses concentrate... more
An experiment was conducted to test the optical efficiency of the lenses of the Concentrating Photovoltaic Glazing (CoPVG) concept. The CoPVG is a seasonal glazing system consisting of longitudinal prismatic lenses. The lenses concentrate sunlight onto the focus where Photovoltaic (PV) cells are bonded, generating electricity while simultaneously preventing excessive glare indoors during summer. The system transmits sunlight for daylight purposes in winter. The experimental results were compared with an analytical model developed at Ulster University. Although there were discrepancies between the model and the experimental results, the model can still predict the optical performance of the lenses reliably, and can therefore still provide an overview of the concept’s optical performance. The model was then used to create a visual representation of the glazing’s annual optical performance, demonstrating how the glazing responds to changes in the sun’s position in the sky throughout th...
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The evolution of nanofluids over the years has opened new research opportunities in the field of renewable energy. Research on the optical properties of nanofluids for application in direct absorption solar collectors (DASCs) is... more
The evolution of nanofluids over the years has opened new research opportunities in the field of renewable energy. Research on the optical properties of nanofluids for application in direct absorption solar collectors (DASCs) is progressing at a burgeoning speed. In a DASC system, nanofluid with high optical absorptivity can convert the incident solar energy into the thermal energy of the fluid. The dispersed nanoparticles in the fluid act in the process through the phenomenon of absorption and scattering. Studies conducted on the optical property characterization of monocomponent nanofluids have become saturated. Moreover, the photothermal efficiency (PTE) of the nanofluid can be enhanced by using multicomponent nanofluids. Nanofluids prepared using varying materials, shapes and sizes of nanoparticles can tune the absorption spectra of the bulk fluid to improve the PTE. A hybrid nanocomposite can similarly enhance the absorptivity due to the synergy of materials present in the nano...
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Over the years, the contribution of solar photovoltaic systems to the power generation is expected to grow through household small scale, and commercial scale solar installation. Researcher pronouncing that delivering such a determination... more
Over the years, the contribution of solar photovoltaic systems to the power generation is expected to grow through household small scale, and commercial scale solar installation. Researcher pronouncing that delivering such a determination require greater motivation and innovation and much more dynamic power grid network to manage solar generation connection. This research work identifies and recommends the possibilities of applying proven technical know how to get the maximum from the existing power network economically. The simulated case study examples of various capacity connection requests was carried out to provide key insights on the problems faced by the PV farm connections in their line of business. This research is also an effort to give many answers to solar PV developers and enthusiasts who are not very technical and confused about different money saving connection options and the electrical constraints of the power grid. This study data can be used to provide recommendat...
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Introduction The Energy Performance of Buildings Directive (EPBD) and Renewable Energy Framework Directive (REFD) require that Renewable Energy Systems (RES) are actively promoted in offsetting conventional fossil fuel use in buildings. A... more
Introduction The Energy Performance of Buildings Directive (EPBD) and Renewable Energy Framework Directive (REFD) require that Renewable Energy Systems (RES) are actively promoted in offsetting conventional fossil fuel use in buildings. A better appreciation of solar systems integration will directly support this objective, leading to an increased uptake in the application of renewables in buildings. By integrating these systems into the building elements (walls, roofs, etc.) not only means replacing a conventional building material (and associated costs), but also aesthetically integrating it into the building design leads to improved architectural integration.
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Developing effective solar energy technologies which can be integrated into buildings and provide heat, electricity and/or reduce energy needs, is vital to achieving set international targets for renewable energy generation and carbon... more
Developing effective solar energy technologies which can be integrated into buildings and provide heat, electricity and/or reduce energy needs, is vital to achieving set international targets for renewable energy generation and carbon emissions reduction. While a range of technologies are available at the moment for building integration most of them are simply superimposed on the building structure rather than becoming an essential part of it. This does not allow for the full advantages of building integration to materialise as it does not reduce costs by replacing conventional building materials and components. A Concentrating PV/Thermal Glazing (CoPVTG) façade technology that combines glazing based solar concentrating elements, coupled with PV/Thermal absorbers has been developed. The technology is a modular multifunctional building component based on conventional double glazing. It is compatible with traditional façade structures and fenestration framing arrangements which allows...
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The Energy Performance of Buildings Directive and Renewable Energy Framework Directive require that Renewable Energy Systems (RES) are actively promoted in offsetting conventional fossil fuel use in buildings. A better appreciation of... more
The Energy Performance of Buildings Directive and Renewable Energy Framework Directive require that Renewable Energy Systems (RES) are actively promoted in offsetting conventional fossil fuel use in buildings. A better appreciation of solar systems integration will directly support this objective, leading to an increased uptake in the application of renewables in buildings. By integrating these systems into the building elements (walls, roofs, etc.) not only means replacing a conventional building material (and associated costs), but also aesthetically integrating it into the building design leads to improved architectural integration.A modular Hybrid Photovoltaic/Solar Thermal (HyPV/T) Facade technology that utilizes Integrated Collector Storage (ICS) solar technology, providing cost effective solar PV and thermal energy collection for direct use in the building, whilst providing significant thermal insulation has been developed and evaluated experimentally at Ulster University. Th...
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Research Interests: Mechanical Engineering, Environmental Science, Renewable Energy, Performance, Climate, and 13 moreSimulation, Seasonality, Numerical Simulation, Orientation, Insolation, Grid, Time Dependent, Inverter, Photovoltaic system, System performance, Electrical And Electronic Engineering, Inclination, and Performance Ratio
The effect of 12 different combinations of diffuse–global correlations and tilted surface radiation models on the accuracy of PV output simulation of a grid-connected photovoltaic (PV) system was studied using statistical methods. A site... more
The effect of 12 different combinations of diffuse–global correlations and tilted surface radiation models on the accuracy of PV output simulation of a grid-connected photovoltaic (PV) system was studied using statistical methods. A site specific diffuse–global ...
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The performance of a roof mounted grid-connected photovoltaic (PV) system in Northern Ireland was monitored over 3 years on annual, seasonal and monthly bases. The overall system performance was adversely affected by low insolation... more
The performance of a roof mounted grid-connected photovoltaic (PV) system in Northern Ireland was monitored over 3 years on annual, seasonal and monthly bases. The overall system performance was adversely affected by low insolation conditions; 19% of total incident insolation was ...
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... Mondol, Jayanta Deb, Yohanis, Yigzaw, Smyth, Mervyn and Brian , Norton (2003) Performance analysis of a grid-connected building integrated photovoltaic system. In: ISES Solar World Congress 2003, Goteborg, Sweeden. Full text not... more
... Mondol, Jayanta Deb, Yohanis, Yigzaw, Smyth, Mervyn and Brian , Norton (2003) Performance analysis of a grid-connected building integrated photovoltaic system. In: ISES Solar World Congress 2003, Goteborg, Sweeden. Full text not available from this repository. ...
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ABSTRACT The wide scale application of anaerobic digestion (AD) technology has been limited in colder climate regions as these systems can be adversely affected by low ambient temperatures, leading to a cumbersome digestion of the waste... more
ABSTRACT The wide scale application of anaerobic digestion (AD) technology has been limited in colder climate regions as these systems can be adversely affected by low ambient temperatures, leading to a cumbersome digestion of the waste and longer hydraulic retention time resulting in reduced biogas yield. These issues can be addressed by developing small-scale locally applied systems/processes that can be improved by increasing the temperature of the biomass slurry to enhance the process rate. In this paper a new hybrid system is proposed. The proposed system is based upon a conceptual Solar Accelerator Anaerobic Digester (SAAD) design developed at the University of Ulster and TERI’s Enhanced Acidification and Methanation (TEAM) developed by The Energy and Resources Institute (TERI), India. An experimental programme determined the operational characteristics of the SAAD design covering the aspects of solar heating and its influence on batch AD process. The effect on the acidification process was also investigated by monitoring the batch pH, COD and volatile fatty acid concentration. The results showed that under a range of operating conditions the proposed system has a potential to degrade various feedstocks at a faster rate resulting in improvements in yield for different operating conditions.
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... Research Institutes and Groups: Built Environment Research Institute Built Environment Research Institute > Centre for Sustainable Technologies (CST). ID Code: 14561. Deposited By: Dr JayantaMondol. Deposited On: 20 Jul... more
... Research Institutes and Groups: Built Environment Research Institute Built Environment Research Institute > Centre for Sustainable Technologies (CST). ID Code: 14561. Deposited By: Dr JayantaMondol. Deposited On: 20 Jul 2010 09:30. Last Modified: 01 Sep 2010 11:35. ...
ABSTRACT A significant problem in utilising the Compound Parabolic Concentrator (CPC) in photovoltaic (PV) applications is the non-uniform illumination on the receiver which results in current reduction for PV modules in which cells are... more
ABSTRACT A significant problem in utilising the Compound Parabolic Concentrator (CPC) in photovoltaic (PV) applications is the non-uniform illumination on the receiver which results in current reduction for PV modules in which cells are serially connected. A novel PV module with isolated cells, which yield high current for cells located in peak energy fluxes, has been designed and experimentally characterised with and without the CPC using a multi-purpose mobile solar simulator. The CPC had an acceptance half-angle of 30 degrees and truncated geometrical concentration ratio of 1.96. Due to the variation in energy flux profile on each cell, it was found that the energy flux concentration on the surface of the PV module within the CPC varied from 0.9 to 3.6, with high energy flux being concentrated at the edges of the receiver. As a result, the cell performance parameters such as current, short-circuit current, power at maximum power point and fill factor for the cells within the CPC varied depending on the location of the cell in the PV module. The total maximum power output for the cells within the CPC was 25% higher than that without concentration. (c) 2012 Elsevier Ltd. All rights reserved.
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Photovoltaic (PV) concentrators are a promising approach for lowering PV electricity costs in the near future. However, most of the concentrators that are currently used for PV applications yield nonuniform flux profiles on the surface of... more
Photovoltaic (PV) concentrators are a promising approach for lowering PV electricity costs in the near future. However, most of the concentrators that are currently used for PV applications yield nonuniform flux profiles on the surface of a PV module which in turn reduces its electrical performance if the cells are serially connected. One way of overcoming this effect is the use of PV modules with isolated cells so that each cell generates current that is proportional to the energy flux absorbed. However, there are some cases where nonuniform illumination also exists in a single cell in an isolated cells PV module. This paper systematically studied the effect of nonuniform illumination on various cell performance parameters of a single monocrystalline standard PV cell at low and medium energy concentration ratios. Furthermore, the effect of orientation, size, and geometrical shapes of nonuniform illumination was also investigated. It was found that the effect of nonuniform illuminat...