The Experts below are selected from a list of 3012 Experts worldwide ranked by ideXlab platform
Yiding Cao - One of the best experts on this subject based on the ideXlab platform.
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convection heat loss from cavity receiver in Parabolic Dish solar thermal power system a review
Solar Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:The convection heat loss from cavity receiver in Parabolic Dish solar thermal power system can significantly reduce the efficiency and consequently the cost effectiveness of the system. It is important to assess this heat loss and subsequently improve the thermal performance of the receiver. This paper aims to present a comprehensive review and systematic summarization of the state of the art in the research and progress in this area. The efforts include the convection heat loss mechanism, experimental and numerical investigations on the cavity receivers with varied shapes that have been considered up to date, and the Nusselt number correlations developed for convection heat loss prediction as well as the wind effect. One of the most important features of this paper is that it has covered numerous cavity literatures encountered in various other engineering systems, such as those in electronic cooling devices and buildings. The studies related to those applications may provide valuable information for the solar receiver design, which may otherwise be ignored by a solar system designer. Finally, future development directions and the issues that need to be further investigated are also suggested. It is believed that this comprehensive review will be beneficial to the design, simulation, performance assessment and applications of the solar Parabolic Dish cavity receivers.
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a Parabolic Dish amtec solar thermal power system and its performance evaluation
Applied Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:This paper proposes a Parabolic Dish/AMTEC solar thermal power system and evaluates its overall thermal-electric conversion performance. The system is a combined system in which a Parabolic Dish solar collector is cascaded with an alkali metal thermal to electric converter (AMTEC) through a coupling heat exchanger. A separate type heat-pipe receiver is selected to isothermally transfer the solar energy from the collector to the AMTEC. To assess the system's overall thermal-electric conversion performance, a theoretical analysis has been undertaken in conjunction with a parametric investigation by varying relevant parameters, i.e., the average operating temperature and performance parameters associate with the Dish collector and the AMTEC. Results show that the overall conversion efficiency of Parabolic Dish/AMTEC system could reach up to 20.6% with a power output of 18.54Â kW corresponding to an operating temperature of 1280Â K. Moreover, it is found that the optimal condenser temperature, corresponding to the maximum overall efficiency, is around 600Â K. This study indicates that the Parabolic Dish/AMTEC solar power system exhibits a great potential and competitiveness over other solar Dish/engine systems, and the proposed system is a viable solar thermal power system.
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A Parabolic Dish/AMTEC solar thermal power system and its performance evaluation
Applied Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:This paper proposes a Parabolic Dish/AMTEC solar thermal power system and evaluates its overall thermal-electric conversion performance. The system is a combined system in which a Parabolic Dish solar collector is cascaded with an alkali metal thermal to electric converter (AMTEC) through a coupling heat exchanger. A separate type heat-pipe receiver is selected to isothermally transfer the solar energy from the collector to the AMTEC. To assess the system's overall thermal-electric conversion performance, a theoretical analysis has been undertaken in conjunction with a parametric investigation by varying relevant parameters, i.e., the average operating temperature and performance parameters associate with the Dish collector and the AMTEC. Results show that the overall conversion efficiency of Parabolic Dish/AMTEC system could reach up to 20.6% with a power output of 18.54Â kW corresponding to an operating temperature of 1280Â K. Moreover, it is found that the optimal condenser temperature, corresponding to the maximum overall efficiency, is around 600Â K. This study indicates that the Parabolic Dish/AMTEC solar power system exhibits a great potential and competitiveness over other solar Dish/engine systems, and the proposed system is a viable solar thermal power system.
Lan Xiao - One of the best experts on this subject based on the ideXlab platform.
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convection heat loss from cavity receiver in Parabolic Dish solar thermal power system a review
Solar Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:The convection heat loss from cavity receiver in Parabolic Dish solar thermal power system can significantly reduce the efficiency and consequently the cost effectiveness of the system. It is important to assess this heat loss and subsequently improve the thermal performance of the receiver. This paper aims to present a comprehensive review and systematic summarization of the state of the art in the research and progress in this area. The efforts include the convection heat loss mechanism, experimental and numerical investigations on the cavity receivers with varied shapes that have been considered up to date, and the Nusselt number correlations developed for convection heat loss prediction as well as the wind effect. One of the most important features of this paper is that it has covered numerous cavity literatures encountered in various other engineering systems, such as those in electronic cooling devices and buildings. The studies related to those applications may provide valuable information for the solar receiver design, which may otherwise be ignored by a solar system designer. Finally, future development directions and the issues that need to be further investigated are also suggested. It is believed that this comprehensive review will be beneficial to the design, simulation, performance assessment and applications of the solar Parabolic Dish cavity receivers.
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a Parabolic Dish amtec solar thermal power system and its performance evaluation
Applied Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:This paper proposes a Parabolic Dish/AMTEC solar thermal power system and evaluates its overall thermal-electric conversion performance. The system is a combined system in which a Parabolic Dish solar collector is cascaded with an alkali metal thermal to electric converter (AMTEC) through a coupling heat exchanger. A separate type heat-pipe receiver is selected to isothermally transfer the solar energy from the collector to the AMTEC. To assess the system's overall thermal-electric conversion performance, a theoretical analysis has been undertaken in conjunction with a parametric investigation by varying relevant parameters, i.e., the average operating temperature and performance parameters associate with the Dish collector and the AMTEC. Results show that the overall conversion efficiency of Parabolic Dish/AMTEC system could reach up to 20.6% with a power output of 18.54Â kW corresponding to an operating temperature of 1280Â K. Moreover, it is found that the optimal condenser temperature, corresponding to the maximum overall efficiency, is around 600Â K. This study indicates that the Parabolic Dish/AMTEC solar power system exhibits a great potential and competitiveness over other solar Dish/engine systems, and the proposed system is a viable solar thermal power system.
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A Parabolic Dish/AMTEC solar thermal power system and its performance evaluation
Applied Energy, 2010Co-Authors: Lan Xiao, Yiding CaoAbstract:This paper proposes a Parabolic Dish/AMTEC solar thermal power system and evaluates its overall thermal-electric conversion performance. The system is a combined system in which a Parabolic Dish solar collector is cascaded with an alkali metal thermal to electric converter (AMTEC) through a coupling heat exchanger. A separate type heat-pipe receiver is selected to isothermally transfer the solar energy from the collector to the AMTEC. To assess the system's overall thermal-electric conversion performance, a theoretical analysis has been undertaken in conjunction with a parametric investigation by varying relevant parameters, i.e., the average operating temperature and performance parameters associate with the Dish collector and the AMTEC. Results show that the overall conversion efficiency of Parabolic Dish/AMTEC system could reach up to 20.6% with a power output of 18.54Â kW corresponding to an operating temperature of 1280Â K. Moreover, it is found that the optimal condenser temperature, corresponding to the maximum overall efficiency, is around 600Â K. This study indicates that the Parabolic Dish/AMTEC solar power system exhibits a great potential and competitiveness over other solar Dish/engine systems, and the proposed system is a viable solar thermal power system.
A R Veerappan - One of the best experts on this subject based on the ideXlab platform.
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An Experimental Evaluation of Energy and Exergy Efficiency of a Solar Parabolic Dish Thermoelectric Power Generator
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2014Co-Authors: Subramaniam Shanmugam, A R Veerappan, M. EswaramoorthyAbstract:A low-cost Parabolic Dish collector was made and tested with commercial thermoelectric modules made of bismuth telluride for electricity generation on its focal plane; the energy end exergy efficiencies were experimentally evaluated. It was found that the daily average temperature of the receiver plate in the solar Parabolic Dish thermoelectric generator was 127.4°C with the maximum of 189°C. The energy and exergy efficiencies were in the range 0.94–1.68% and 1.01–1.81%, respectively.
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Modeling and Analysis of a Solar Parabolic Dish Thermoelectric Generator
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2014Co-Authors: Subramaniam Shanmugam, M. Eswaramoorthy, A R VeerappanAbstract:This article presents the modeling and analysis of a thermoelectric power generator driven by a solar Parabolic Dish collector. The system is modeled by a set of steady state energy balance equations from the first law of thermodynamics for two main components of the solar Parabolic Dish collector and thermoelectric power generator. The developed model is analyzed for various operating conditions and design parameters. Modeling results are compared with experimental results and they are within 10% accuracy.
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Energy and Exergy Analysis of Solar Parabolic Dish Thermoelectric Generator
Applied Mechanics and Materials, 2014Co-Authors: G. Muthu, Subramaniam Shanmugam, A R VeerappanAbstract:The Performance of a thermal system is generally analysed by carrying out energy and exergy analysis of its different subsystems. In the present study the performance of subsystem namely PDC, receiver plate and PDC in a system of solar Parabolic Dish thermoelectric generator is studied. It is found that the energy and exergy loss are minimum in the receiver plate as compared to PDC and thermoelectric generator (TEG) at a particular direct normal irradiation (DNI). The exergy and energy efficiency in the PDC and TEG increase with increase in concentration ratio.
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Solar Parabolic Dish Thermoelectric Generator with Acrylic Cover
Energy Procedia, 2014Co-Authors: G. Muthu, Subramaniam Shanmugam, A R VeerappanAbstract:Abstract The use of solar energy in the production of electricity is gaining momentum for obvious reasons. This article presents an experimental model of thermoelectric generator driven by a solar Parabolic Dish collector having open mouth diameter of 3.56 m with focal length of 1.11 m. The focal receiver is embedded by flat thermoelectric modules with an absorber plate and it is enclosed in an acrylic cover. Experiments were conducted at a constant flow rate of heat transfer fluid of water. There is a substantial increase in the overall efficiency of the system. An Empirical relationship to find the system efficiency, over a range of solar beam radiation, with and without cover is also presented
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Mathematical Modeling of Thermoelectric Generator with Solar Parabolic Dish
Applied Mechanics and Materials, 2014Co-Authors: G. Muthu, Subramaniam Shanmugam, A R VeerappanAbstract:The use of solar energy in the production of electricity is gaining momentum for obvious reasons. This article presents an analytical model of thermoelectric generator (TEG) driven by a solar Parabolic Dish collector having open mouth diameter of 3.56 m with focal length of 1.11 m. The focal receiver is embedded by flat thermoelectric modules with an absorber plate and it is enclosed in an acrylic cover. TEG with acrylic cover and without acrylic cover were studied analytically for different solar beam radiation at a constant flow rate of heat transfer fluid of water. TEG with acrylic cover system was able to produce 35.3% improvement in overall efficiency and 55.1% improvement in electrical power output at solar beam radiation of 1100W/m2.
K.s. Reddy - One of the best experts on this subject based on the ideXlab platform.
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Investigations on water–LiBr‐based absorption refrigerator with solar Parabolic Dish in cogeneration mode
IET Renewable Power Generation, 2019Co-Authors: Pathuthara Abdul Shukoor, K.s. ReddyAbstract:Here, performance of 11 kW solar-powered lithium bromide water absorption chillers in cogeneration mode is investigated. A 40 m 2 solar Parabolic Dish of 19 kW th capacity is used for both processes heating and cooling. Extensive thermodynamic design and analysis are carried out, and the results obtained are validated. Parabolic Dish and cavity receiver are sized for Chennai (13°N, 80.18°E), India. In the present analysis, a new performance parameter COP WE is introduced by replacing the thermal input component in the calculation of COP, by an equivalent amount of high-grade energy. Both physical and chemical exergy at all state points of the chiller are estimated and found that total irreversibility is about 2.37 kW in desorber followed by absorber which is 0.41 kW. The developed model estimates solution concentration at the exit of solution expansion valve (SEV) that is important since it affects absorption of refrigerant in the absorber.
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investigations on water libr based absorption refrigerator with solar Parabolic Dish in cogeneration mode
Iet Renewable Power Generation, 2019Co-Authors: Pathuthara Abdul Shukoor, K.s. ReddyAbstract:Here, performance of 11 kW solar-powered lithium bromide water absorption chillers in cogeneration mode is investigated. A 40 m 2 solar Parabolic Dish of 19 kW th capacity is used for both processes heating and cooling. Extensive thermodynamic design and analysis are carried out, and the results obtained are validated. Parabolic Dish and cavity receiver are sized for Chennai (13°N, 80.18°E), India. In the present analysis, a new performance parameter COP WE is introduced by replacing the thermal input component in the calculation of COP, by an equivalent amount of high-grade energy. Both physical and chemical exergy at all state points of the chiller are estimated and found that total irreversibility is about 2.37 kW in desorber followed by absorber which is 0.41 kW. The developed model estimates solution concentration at the exit of solution expansion valve (SEV) that is important since it affects absorption of refrigerant in the absorber.
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Viability analysis of solar Parabolic Dish stand-alone power plant for Indian conditions
Applied Energy, 2013Co-Authors: K.s. Reddy, G. VeershettyAbstract:The solar Parabolic Dish collector is one of the most efficient energy conversion technologies among the concentrating solar power (CSP) systems. The design and implementation of solar Parabolic Dish power plants will result in sustainable energy generation. In this article, techno-economic feasibility analysis of a 5MWe solar Parabolic Dish collector field is carried out for entire India covering 58 locations. The solar Parabolic Dish power plant configuration is investigated based on various parameters such as the spacing between Dish collectors, land area required, percentage of the shadow and energy yield. The shadow profile around the Dish throughout the year at various latitudes (8–35°N) for various plant-operating hours is determined. In-line arrangement of the solar Dish collector arrays is found to be a better choice in terms of the minimum land area required for setting up the power plant. The generalized correlations are developed for both east–west and north–south spacing distances as the function of latitude and plant operating hours. It is found that the configuration corresponding to the plant operating from 1h after sunrise to 1h before sunset with spacing distance in east–west direction equal to the shadow length after 2h sunrise and in north–south direction equal to shadow length at noon for winter solstice gives the highest energy output with optimum land use. The minimum and maximum average annual power generation at Panaji and Tiruchirapalli are 7.25GWh, and 12.68GWh respectively. The minimum levelised electricity cost (LEC) for a stand-alone solar Parabolic Dish power plant with the clean development mechanism (CDM) is found to be INR 9.83 ($ 0.197, 1$=INR 50) at Indore with payback period of 10.63years with cost benefit ratio of 1.48. Based on the financial performance, most of the northern region locations and some of the western and southern region locations are found attractive for power generation by the solar Parabolic Dish power collector based on the direct steam generation, where direct normal irradiation (DNI) is more than 5kWh/m2day.
M. Eswaramoorthy - One of the best experts on this subject based on the ideXlab platform.
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An Experimental Evaluation of Energy and Exergy Efficiency of a Solar Parabolic Dish Thermoelectric Power Generator
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2014Co-Authors: Subramaniam Shanmugam, A R Veerappan, M. EswaramoorthyAbstract:A low-cost Parabolic Dish collector was made and tested with commercial thermoelectric modules made of bismuth telluride for electricity generation on its focal plane; the energy end exergy efficiencies were experimentally evaluated. It was found that the daily average temperature of the receiver plate in the solar Parabolic Dish thermoelectric generator was 127.4°C with the maximum of 189°C. The energy and exergy efficiencies were in the range 0.94–1.68% and 1.01–1.81%, respectively.
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Modeling and Analysis of a Solar Parabolic Dish Thermoelectric Generator
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2014Co-Authors: Subramaniam Shanmugam, M. Eswaramoorthy, A R VeerappanAbstract:This article presents the modeling and analysis of a thermoelectric power generator driven by a solar Parabolic Dish collector. The system is modeled by a set of steady state energy balance equations from the first law of thermodynamics for two main components of the solar Parabolic Dish collector and thermoelectric power generator. The developed model is analyzed for various operating conditions and design parameters. Modeling results are compared with experimental results and they are within 10% accuracy.
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Experimental Study on Solar Parabolic Dish Thermoelectric Generator
International Journal of Energy Engineering, 2013Co-Authors: M. Eswaramoorthy, Subramaniam Shanmugam, A R VeerappanAbstract:The applications of solar Dish and thermoelectric generator have the research potential as green and clean energy generation from solar thermal route. In this paper, an attempt has been made to conduct an experimental study on small scale solar Parabolic Dish thermoelectric generator. The solar Parabolic Dish collector is fabricated using an unused satellite Dish antenna fitted with polished aluminum sheet as concentrator surface. Thermoelectric generator consists of commercial thermoelectric modules embedded between the receiver plate and water cooled heat sink which is placed on the focal plane of manual tracking Parabolic Dish collector. The concentrated solar radiation and water cooled heat sink is the driving potential to generate electricity, various operating parameters like receiver plate temperature, power output and conversion efficiency with respect to solar radiation are studied. It is found that the receiver plate temperature is significantly affecting the power output. Also, in this study it is identified to reuse the unused Dish antenna for solar collector and coupled with commercial thermoelectric module is simple fabrication method easy to adopt in the rural techno craft for small scale power generator to meet the isolated energy demands.
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Solar Parabolic Dish thermoelectric generator: A technical study
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2013Co-Authors: M. Eswaramoorthy, Sivaprakash ShanmugamAbstract:This article presents a technical study on a solar Parabolic Dish thermoelectric generator using annual average solar radiation data at site and its standard efficiencies. The energy balance equations are developed for the Parabolic Dish concentrator and thermoelectric generator. The numerical analysis is made to study its technical possibilities to meet a rural house annual energy demand of 16.80 kWh by a thermoelectric generator capacity of 120 W and Parabolic Dish concentrator surface area of 6.3 m2. It found that the proposed system is generating 24 and 7% of excess electricity at maximum and minimum radiation data respectively.
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The Thermal Performance of a Low Cost Solar Parabolic Dish Collector for Process Heat
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2012Co-Authors: M. Eswaramoorthy, Subramaniam ShanmugamAbstract:Abstract This article communicates thermal performance of a low cost solar Parabolic Dish collector. The Parabolic Dish collector is developed from low cost technology and is tested in the outdoors on a sunny day by measuring stagnation temperature on the flat absorber. The absorber, made of aluminum alloys and coated with black paint, is placed on the focal receiver. The calculated overall heat transfer co-efficient varies from 130 to 180 W/m2 K for the actual climate conditions at Tiruchirappalli, India. The thermal efficiency of the thermal collector is found to be 60% and the cost is minimized to half the cost of a collector that is available in the market with the same specifications.
