The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Ramalingam Velraj - One of the best experts on this subject based on the ideXlab platform.
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review of Solar Cooling methods and thermal storage options
Renewable & Sustainable Energy Reviews, 2011Co-Authors: L. A. Chidambaram, A. S. Ramana, G. Kamaraj, Ramalingam VelrajAbstract:Power shortage and unstable power supply remain serious problems. Conventional Cooling technologies that utilize harmful refrigerants consume more energy and cause peak loads leading to negative environmental impacts. As the world grapples with the energy and environmental crisis, there is an urgent need to develop and promote environmentally benign sustainable Cooling technologies. Solar Cooling is one such promising technology, given the fact that Solar energy is the cheapest and widely available renewable energy that matches the Cooling load requirements. Thermal storage systems are essential to overcome the disadvantage of the intermittent nature of Solar energy and variation in Cooling demand. The enhanced utilization of Solar energy and other consequences of thermal storage integrated systems have gained the attention of researchers in the recent years. This paper reviews research articles in the field of Solar Cooling techniques, Solar collectors, storage methods and their integration, along with performance improvement studies reported using thermal stratification and cascaded thermal storage systems.
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Review of Solar Cooling methods and thermal storage options
Renewable and Sustainable Energy Reviews, 2011Co-Authors: L. A. Chidambaram, A. S. Ramana, G. Kamaraj, Ramalingam VelrajAbstract:Power shortage and unstable power supply remain serious problems. Conventional Cooling technologies that utilize harmful refrigerants consume more energy and cause peak loads leading to negative environmental impacts. As the world grapples with the energy and environmental crisis, there is an urgent need to develop and promote environmentally benign sustainable Cooling technologies. Solar Cooling is one such promising technology, given the fact that Solar energy is the cheapest and widely available renewable energy that matches the Cooling load requirements. Thermal storage systems are essential to overcome the disadvantage of the intermittent nature of Solar energy and variation in Cooling demand. The enhanced utilization of Solar energy and other consequences of thermal storage integrated systems have gained the attention of researchers in the recent years. This paper reviews research articles in the field of Solar Cooling techniques, Solar collectors, storage methods and their integration, along with performance improvement studies reported using thermal stratification and cascaded thermal storage systems. © 2011 Elsevier Ltd. All rights reserved.
Marco Scarpellino - One of the best experts on this subject based on the ideXlab platform.
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experimental analysis and dynamic simulation of a novel high temperature Solar Cooling system
Energy Conversion and Management, 2016Co-Authors: Annamaria Buonomano, Francesco Calise, Massimo Dentice Daccadia, Gabriele Ferruzzi, Sabrina Frascogna, Adolfo Palombo, R Russo, Marco ScarpellinoAbstract:Abstract This paper presents experimental and numerical analyses of a novel high-temperature Solar Cooling system based on innovative flat-plate evacuated Solar thermal collectors (SC). This is the first Solar Cooling system, including a double-effect absorption chiller, which is based on non-concentrating Solar thermal collectors. The aim of the paper is prove the technical and economic feasibility of the system, also presenting a comparison with a conventional technology, based on concentrating Solar thermal collectors. To this scope, an experimental setup has been installed in Saudi Arabia. Here, several measurement devices are installed in order to monitor and control all the thermodynamic parameters of the system. The paper presents some of the main results of this experimental campaign, showing temperatures, powers, energies and efficiencies for a selected period. Experimental results showed that collector peak efficiency is higher than 60%, whereas daily average efficiency is around 40%. This prototypal Solar Cooling system has been numerically analysed, developing a dynamic simulation model aiming at predicting system performance. For a representative operating period, numerical data were compared with the experimental one, showing an excellent accuracy of the model. A similar system, equipped with Parabolic Trough Solar thermal collectors (PTC) was also simulated in order to compare the novel Solar collectors with such reference technology. For both systems a detailed thermo-economic model has been implemented in order to perform such comparison also from the economic point of view. Results showed that the rated energy performance of the prototypal Solar Cooling system featuring new collectors is better than that of the reference system. In particular, the difference between the novel and the reference Solar Cooling system becomes more and more significant, when considering the effects of dust and defocusing related to the tracking mechanism of concentrating collectors in harsh environments. Finally, from the economic point of view, results showed that the novel prototype was able to achieve a good profitability.
L S Chan - One of the best experts on this subject based on the ideXlab platform.
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comparative study of different Solar Cooling systems for buildings in subtropical city
Solar Energy, 2010Co-Authors: K. F. Fong, T T Chow, L S ChanAbstract:In recent years, more and more attention has been paid on the application potential of Solar Cooling for buildings. Due to the fact that the efficiency of Solar collectors is generally low at the time being, the effectiveness of Solar Cooling would be closely related to the availability of Solar irradiation, climatic conditions and geographical location of a place. In this paper, five types of Solar Cooling systems were involved in a comparative study for subtropical city, which is commonly featured with long hot and humid summer. The Solar Cooling systems included the Solar electric compression refrigeration, Solar mechanical compression refrigeration, Solar absorption refrigeration, Solar adsorption refrigeration and Solar solid desiccant Cooling. Component-based simulation models of these systems were developed, and their performances were evaluated throughout a year. The key performance indicators are Solar fraction, coefficient of performance, Solar thermal gain, and primary energy consumption. In addition, different installation strategies and types of Solar collectors were compared for each kind of Solar Cooling system. Through this comparative study, it was found that Solar electric compression refrigeration and Solar absorption refrigeration had the highest energy saving potential in the subtropical Hong Kong. The former is to make use of the Solar electric gain, while the latter is to adopt the Solar thermal gain. These two Solar Cooling systems would have even better performances through the continual advancement of the Solar collectors. It will provide a promising application potential of Solar Cooling for buildings in the subtropical region.
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Comparative study of different Solar Cooling systems for buildings in subtropical city
2010Co-Authors: K. F. Fong, C. K. Lee, Z. Lin, T T Chow, L S ChanAbstract:In recent years, more and more attention has been paid on the application potential of Solar Cooling for buildings. Due to the fact that the efficiency of Solar collectors is generally low at the time being, the effectiveness of Solar Cooling would be closely related to the availability of Solar irradiation, climatic conditions and geographical location of a place. In this paper, five types of Solar Cooling systems were involved in a comparative study for subtropical city, which is commonly featured with long hot and humid summer. The Solar Cooling systems included the Solar electric compression refrigeration, Solar mechanical compression refrigeration, Solar absorption refrigeration, Solar adsorption refrigeration and Solar solid desiccant Cooling. Component-based simulation models of these systems were developed, and their performances were evaluated throughout a year. The key performance indicators are Solar fraction, coefficient of performance, Solar thermal gain, and primary energy consumption. In addition, different installation strategies and types of Solar collectors were compared for each kind of Solar Cooling system. Through this comparative study, it was found that Solar electric compression refrigeration and Solar absorption refrigeration had the highest energy saving potential in the subtropical Hong Kong. The former is to make use of the Solar electric gain, while the latter is to adopt the Solar thermal gain. These two Solar Cooling systems would have even better performances through the continual advancement of the Solar collectors. It will provide a promising application potential of Solar Cooling for buildings in the subtropical region. ?? 2009 Elsevier Ltd. All rights reserved.
L. A. Chidambaram - One of the best experts on this subject based on the ideXlab platform.
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review of Solar Cooling methods and thermal storage options
Renewable & Sustainable Energy Reviews, 2011Co-Authors: L. A. Chidambaram, A. S. Ramana, G. Kamaraj, Ramalingam VelrajAbstract:Power shortage and unstable power supply remain serious problems. Conventional Cooling technologies that utilize harmful refrigerants consume more energy and cause peak loads leading to negative environmental impacts. As the world grapples with the energy and environmental crisis, there is an urgent need to develop and promote environmentally benign sustainable Cooling technologies. Solar Cooling is one such promising technology, given the fact that Solar energy is the cheapest and widely available renewable energy that matches the Cooling load requirements. Thermal storage systems are essential to overcome the disadvantage of the intermittent nature of Solar energy and variation in Cooling demand. The enhanced utilization of Solar energy and other consequences of thermal storage integrated systems have gained the attention of researchers in the recent years. This paper reviews research articles in the field of Solar Cooling techniques, Solar collectors, storage methods and their integration, along with performance improvement studies reported using thermal stratification and cascaded thermal storage systems.
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Review of Solar Cooling methods and thermal storage options
Renewable and Sustainable Energy Reviews, 2011Co-Authors: L. A. Chidambaram, A. S. Ramana, G. Kamaraj, Ramalingam VelrajAbstract:Power shortage and unstable power supply remain serious problems. Conventional Cooling technologies that utilize harmful refrigerants consume more energy and cause peak loads leading to negative environmental impacts. As the world grapples with the energy and environmental crisis, there is an urgent need to develop and promote environmentally benign sustainable Cooling technologies. Solar Cooling is one such promising technology, given the fact that Solar energy is the cheapest and widely available renewable energy that matches the Cooling load requirements. Thermal storage systems are essential to overcome the disadvantage of the intermittent nature of Solar energy and variation in Cooling demand. The enhanced utilization of Solar energy and other consequences of thermal storage integrated systems have gained the attention of researchers in the recent years. This paper reviews research articles in the field of Solar Cooling techniques, Solar collectors, storage methods and their integration, along with performance improvement studies reported using thermal stratification and cascaded thermal storage systems. © 2011 Elsevier Ltd. All rights reserved.
Zhao Hui-zhong - One of the best experts on this subject based on the ideXlab platform.
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Mechanism and Experimental Study of Solar Cooling Tube
Journal of Henan Agricultural University, 2020Co-Authors: Zhao Hui-zhongAbstract:A Solar Cooling tube uses sunlight as energy to finish the whole refrigerating cycle in one single tube which use zeolite-water as the working pair. The experimental result and performance effect show that a Solar Cooling tube's Cooling capacity is 200 kJ and the coefficient of performance(COP) is between 0.24～0.28.
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Experiment Study on the Adsorption Refrigeration in the Solar Cooling Tube
Fluid Machinery, 2020Co-Authors: Zhao Hui-zhongAbstract:A Solar Cooling tube is a Cooling unit which can make a complete refrigeration cycle in a single tube and its mechanism is described.The experimental study for the thermal performance of Solar Cooling tube has been done, which proves it is a feasible Solar Cooling unit.The variation of temperature of the adsorbent bed-inside, outside glass tube and refrigerator was gained during the experiment period. The variation of the mass of desorpted and evaporated refrigerant was also tested.It is found that on a typical day in the summer, the Cooling effect can last 13.5 hours.The temperature of eraporator can reach 18℃ in the Solar Cooling tube.
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Experimental Research of Heating and Refrigeration of Solar Cooling Tube
Journal of Shanghai Jiaotong University, 2020Co-Authors: Zhao Hui-zhongAbstract:This paper presened the structure and experimental study of a Solar Cooling tube.The Solar Cooling tube consists of four major components: Solar collector,adsorbent bed,condenser and evaporator all in one glass tube.It chooses the zeolite13X-water as working pair and is environmental friendly.To evaluate its heating and refrigeration performance,an experiment was conducted on a typical day: total Solar energy to the Solar adsorption Cooling tube is about 23.5 MJ/m~2,a Solar Cooling tube is capable of heating 4 kg of water to about 50 ℃ in daytime and 4 kg of water to about 39 ℃ at night,as well as producing a refrigeration capacity of about 276 kJ.Its coefficient of performance can reach 0.22.
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Numerical Simulation and Experimental Study of the Adsorption Cooling of Solar Cooling Tube in Nighttime
Journal of Shanghai Jiaotong University, 2020Co-Authors: Zhao Hui-zhongAbstract:A Solar Cooling tube is a Cooling unit which can make a complete refrigeration cycle in a single tube. The mechanism of Solar Cooling tube was described. Based on the energy conversion in Solar Cooling tube and adsorption theory, a mathematical model was built for refrigeration process in nighttime. The variation of tubule temperature, refrigerator temperature and evaporating mass with time was calculated. The test on Solar Cooling tube was also set up. Under the conditions of environment temperature 36～(28 °C) and wind velocity (0.5 m/s), it can produce the Cooling capacity in 13 h and come to lowest temperature(18 °C). The results of the mathematical model agree well with the experimental data.
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Experimental Study on a New Type of Freezing-Resistant Solar Cooling Tube
Journal of Henan Agricultural University, 2020Co-Authors: Zhao Hui-zhongAbstract:Based on the adsorption refrigeration theory,we have first designed and made the freezing-resistant Solar Cooling tube using Solar light as energy and carbonmethanol as the working pair.The experimental result and performance effect show that the Solar Cooling tube's Cooling capacity is about 100 kJ and the coefficient of performance(COP) is above 0.11 while the evaporation temperature is-5 ℃.
