solar collector Articles
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Comparison of thermal performances of flat plate and evacuated tube solar air collector at different flow rates: experimental analysis
The thermal performances of an evacuated tube solar air collector and flat plate solar air collector are experimentally investigated at different flow rates of air. The evacuated tube solar air collector has 40 evacuated tubes and surface area, 4.44 m². This setup consists of a header of square shape. The header has a circular pipe at the centre through which the air flows. The setup contains ...
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Exergy analysis and optimisation of collector dimensions in a solar chimney power plant using entropy generation minimisation method
The purpose of this study is to optimise the dimensions of the collector in a solar chimney power plant with entropy generation minimisation (EGM) method. Projection method, based on second–order finite difference discretisation, is developed to solve the coupled equations of continuity, momentum and energy of laminar natural convection in a fully staggered grid. Numerical solution showed that ...
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Dynamic exergetic performance assessment of an integrated solar pond
In this paper, we present an experimental investigation of the exergetic performance of a solar pond integrated with solar collectors (with a surface area of 2096 m² and a depth of 2 m, and four flat–plate collectors with dimensions of 1.90 m × 0.90 m). A data acquisition device is used to measure and record the temperatures hourly at various locations in the pond. An exergy ...
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Exergy analysis of a rock bed thermal storage system
In this paper, a thermodynamic procedure is presented to analyse energy and exergy balances of a rock bed thermal storage system. The thermal behaviour is described by means of a control volume that includes three subsystems: the solar collectors, the fluid distribution system and the storage chamber. Solar-to-thermal energy conversion was obtained by means of a solar collector at a fixed airflow ...
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Operating parameter analysis to improve the performance of solar desiccant wheel using a mathematical model: Part 1
A mathematical model for analysis of various operating parameters to improve the performance of desiccant wheel has been used and heat and mass transfer for both moist air and the desiccant material have been considered. An experimental setup is fabricated using the evacuated tube solar air collector with desiccant wheel. The hot air needed for regeneration is produced by evacuated tube solar air ...
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A solar thermal power system in the city of Thessalonica with the use of the Pinch method for entropy minimisation
The objective of this paper is to create a small power plant, (producing 2 MW annually), which will be using solar energy as a driving fuel. The system is made up of three sub-systems: a set of Solar Collectors (SCS), a Rankine power cycle and a Heat Exchanger Network (HEN). Two cases with variations in the operation of the solar collectors and the heat exchanger network will be examined. The ...
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Solar Bathing System of Shandong Normal University-Lishan College - Case Study
Solar bathing system is a way of energy supply with cleaning, energy-saving and economy. Solar bathing system of Lishan College uses 2000m2 solar collector and it can provide more than 120t hot water everyday which can fully meet bathing water needs of 2000 people. When the sunlight is insufficient, we will use Vacuum Hot Water Chiller for heating as the auxiliary, which is seldom started. ...
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Insulation Materials for Thermal Solar Collectors
Thermal solar collectors absorb sunlight to collect heat. The term thermal solar collector is often used in reference to a device for heating water, however the term also can be used for large power generating installations or non-water heating devices. Solar thermal collectors are extremely efficient at capturing solar radiation, which is mostly comprised of electromagnetic radiation on the ...
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Parametric study and exergy analysis of solar water–lithium bromide absorption cooling system
This paper presents the energy and exergy analysis of single–effect water–lithium bromide absorption cooling system driven by the heat supplied by a field of solar thermal collectors with a cooling capacity of 10 kW. The work is devoted to the study, the evaluation and distribution of the destroyed exergy for each component constituting this kind of system. The thermodynamic models have been ...
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Development and performance evaluation of 0.16 m 2 solar point thermal energy collector compared with flat plate collector
Renewable energy systems such as wind, solar and biomass are significantly more land intensive than traditional fossil fuels. Renewable energy increases diversity of energy supplies and can replace diminishing fossil fuel resources over the long run; their use in place of fossil fuels can substantially reduce greenhouse gases and other pollutants. Application of solar energy for domestic and ...
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Exergy analysis of an air solar heater
This paper presents an exergetic analysis of a downward flat plate collector, an unglazed selective absorber collector and an artificial rough surface collector. The analysis is based on mass, energy and exergy balance equations. The results show that for the Reynolds number of Re = 4000, the daily exergy output rate varies inversely with the mass flow rate per unit area, while the exergy ...
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Solarthermal parabolic trough power plants with integrated storage capacity
Parabolic trough power plants use concentrated direct insulation for steam generation in a Rankine cycle. The fundamentals for direct steam generation in parabolic troughs have been developed in recent years, the feasibility was successfully demonstrated at a solar powered test facility reaching steam temperatures of 400°C at a maximum pressure of 100 bar. Important components for the accelerated ...
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Performance evaluation of locality–based compact solar refrigeration system
Cooling system with low capacity utilising solar power can be widely used for remote and rural cooling applications. This paper describes the trend of solar insolation for a period of one year at Tiruvannamalai town, a district capital in Tamil Nadu state, South India which is geographically located at latitude 12.229 N, longitude 79.076 E. The performance of a compact solar refrigeration system ...
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Performance evaluation of parabolic dish type solar collector for industrial heating application
From Indian perspective there is a large potential available for low cost solar water heating systems. The described system can instantly fulfil needs of hot water in industrial sector. This type of system can be used for heating boiler feed water, laundry applications and other steam generation applications. In general, concentrated solar collectors have high efficiency as compared to flat plate ...
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Matthew Orosz awarded Echoing Green Fellowship to further off-grid energy work
Newly minted MIT PhD selected for two-year social entrepreneurship fellowship. Written by Nathan Birnbaum.You can read the original new in MIT NewsMatthew Orosz MEng '03, SM '06, PhD '12 had a lot to be proud of on June 7. Not only was he invested with his doctoral hood from the Department of Civil and Environmental Engineering, but he also was named a 2012 Echoing Green Fellow to further the ...
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Thermodynamic analysis of an air solar collector
The paper presents the experimental study of an air solar installation with a collecting area AC = 4.2m² and variable working fluid flow rate in the range 0.02÷0.06 kg/s. The experimental data are processed statistically through thermodynamic analysis, using energy (semi-empirical) and exergy methods. The aim of the paper is to establish the optimal air flow rate through this solar thermal system ...
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Evaluation of environmental factors and equipment configuration on efficiency of a solar soil water collector
The aim of this paper is to assess the effects of environmental factors and equipment configuration on the recovery of soil water using a solar collector. The recovery of water from soil is difficult, since the energy requirements are very high. Solar energy provides a solution to this problem, especially in countries with high solar radiation. In the current study, it was found that the amount ...
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Thermodynamic and life cycle assessment of flat–plate collector, photovoltaic system and photovoltaic thermal collector
In this study, an energy, exergy and Life Cycle Assessment (LCA) analysis of a Flat–Plate (FP) collector, a Photovoltaic (PV) system and a Photovoltaic–Thermal (PV–T) collector is carried out for better evaluation. It is observed that instantaneous energy, daily energy and exergy efficiency of the FP collector, the PV system and the PV/T collector vary between 53–61%, 19–30%, 23–37% and 56–74%, ...
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Energy and exergy analysis of a double–pass thermoelectric solar air collector
Analysis of energy and exergy has been performed for a double–pass thermoelectric (TE) solar air collector. The incident solar radiation heats up the absorber plate so that a temperature difference is created between the thermoelectric modules that generate a direct current. Only a small part of the absorbed solar radiation is converted to electricity, while the rest increases the ...
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Energy and exergy analysis of a solar–assisted heat pump space heating system for clear days
The studies over solar–assisted heat pump systems have been performed mostly on time periods when solar radiation is high. Therefore, this study focuses on performance analysis of a solar–assisted heat pump system which stores the energy during the clear day and uses it as a heat source of heat pump space heating system during the night. Energy and exergy analyses divided into two parts, which ...
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