The Experts below are selected from a list of 13140 Experts worldwide ranked by ideXlab platform
R Z Wang - One of the best experts on this subject based on the ideXlab platform.
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Latent Heat thermal Storage using salt hydrates for distributed building Heating: A multi-level scale-up research
Renewable and Sustainable Energy Reviews, 2020Co-Authors: B.c. Zhao, J.c. Gao, R Z WangAbstract:Abstract Latent Heat Storage using sodium acetate trihydrate is a promising Heat Storage Technology for distributed building Heating. However, the industrial and economic feasibility of this Heat Storage Technology has not been proven yet. This work comprehensively carried out industrialization-oriented investigations on this Technology from multi-level aspects of (i) thermal characterization and life-cycle assessment of industrial-grade Storage materials, (ii) thermal design and performance evaluation of practical-scale Heat Storage equipment, and (iii) system integration and economic analysis of a practical Heating project. The results indicate that the industrial-grade modified Storage medium is of similar Heat Storage and transfer capability but a much lower cost, compared with the analytical reagent. However, it suffers from a more serious attenuation (7.3% vs. 4.9% after 300 cycles) in total Heat Storage capacity. The developed latent Heat Storage reservoir can perform stable charges and discharges, with a 24-h thermal loss of around 3.5%. The averaged Storage thermal efficiency, total efficiency and specific operational cost of the electric-powered demonstration Heating system within a 22-day continuous operation are 96.5%, 90.0% and 0.371 RMB (5.2 cents) kWh−1, respectively. The results prove a great application potential of latent Heat Storage using salt hydrates for the Heat dispatch of distributed building Heating.
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experimental investigation on thermochemical Heat Storage using manganese chloride ammonia
Energy, 2018Co-Authors: T. Yan, R Z WangAbstract:Abstract Thermal energy Storage plays a key role in the application of renewable energy and low-grade thermal energy. A laboratory test unit of thermochemical Heat Storage with manganese chloride (MnCl2) as the reactive salt and ammonia (NH3) as the working gas was constructed, in which expanded graphite was used to improve the Heat and mass transfer performance of composite materials. The experimental campaigns show some promising conclusions on the Heat Storage performances of such a Storage unit. With 3.78 kg of composite materials, the highest thermochemical Heat Storage density is about 1391 kJ/kg when the charging and discharging temperature is 174 °C and 50 °C, respectively. The corresponding volume density of thermochemical Heat Storage is 179 kWh/m3. The maximum of thermochemical Heat Storage efficiency obtained is 48%. The maximum of instantaneous thermochemical Heat output power is more than 50 kW. The maximum for the average thermochemical Heat output power reaches to 9.9 kW under the experimental conditions. The application prospects of such a thermochemical Heat Storage system are presented. The promising results have been gained, but some problems must be envisaged. The improvement measures to overcome these problems are also brought forward in order to make the thermochemical Heat Storage Technology realize a successful application in practical systems.
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A review of promising candidate reactions for chemical Heat Storage
Renewable and Sustainable Energy Reviews, 2015Co-Authors: T. Yan, T. X. Li, L W Wang, R Z Wang, Liwei Wang, Ruzhu Wang, Ishugah T. FredAbstract:Thermal energy Storage is a necessary Technology for the application of renewable energy and low-grade thermal energy. Chemical Heat Storage has been proved to be a feasible and promising method to store thermal energy. As compared to other thermal energy Storage methods, chemical Heat Storage exhibits high energy Storage density as well as feasibility for long-duration energy Storage. In this paper, the basic principle of the chemical Heat Storage is firstly elaborated. Then the selection criteria of the chemical reaction are given. The aim of this review is to provide an insight into the promising candidate reactions for chemical Heat Storage application. The associated reversible chemical reactions available for thermal energy Storage systems are summarized. Ongoing research and development studies illustrate that chemical Heat Storage is a very favorable option for the different application when diverse promising candidate reactions are selected. As working temperature is one of the key parameters for thermal energy Storage systems, emphasis is given to the judgment of application temperature range for chemical Heat Storage. The determination of applicative temperature range of reversible chemical reactions is discussed. Besides, the challenge and prospect of the chemical Heat Storage Technology are analyzed in the paper.
Ishugah T. Fred - One of the best experts on this subject based on the ideXlab platform.
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A review of promising candidate reactions for chemical Heat Storage
Renewable and Sustainable Energy Reviews, 2015Co-Authors: T. Yan, T. X. Li, L W Wang, R Z Wang, Liwei Wang, Ruzhu Wang, Ishugah T. FredAbstract:Thermal energy Storage is a necessary Technology for the application of renewable energy and low-grade thermal energy. Chemical Heat Storage has been proved to be a feasible and promising method to store thermal energy. As compared to other thermal energy Storage methods, chemical Heat Storage exhibits high energy Storage density as well as feasibility for long-duration energy Storage. In this paper, the basic principle of the chemical Heat Storage is firstly elaborated. Then the selection criteria of the chemical reaction are given. The aim of this review is to provide an insight into the promising candidate reactions for chemical Heat Storage application. The associated reversible chemical reactions available for thermal energy Storage systems are summarized. Ongoing research and development studies illustrate that chemical Heat Storage is a very favorable option for the different application when diverse promising candidate reactions are selected. As working temperature is one of the key parameters for thermal energy Storage systems, emphasis is given to the judgment of application temperature range for chemical Heat Storage. The determination of applicative temperature range of reversible chemical reactions is discussed. Besides, the challenge and prospect of the chemical Heat Storage Technology are analyzed in the paper.
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A review of promising candidate reactions for chemical Heat
2015Co-Authors: Ishugah T. FredAbstract:Thermal energy Storage is a necessary Technology for the application of renewable energy and low-grade thermal energy. Chemical Heat Storage has been proved to be a feasible and promising method to store thermal energy. As compared to other thermal energy Storage methods, chemical Heat Storage exhibits high energy Storage density as well as feasibility for long-duration energy Storage. In this paper, the basic principle of the chemical Heat Storage is firstly elaborated. Then the selection criteria of the chemical reaction are given. The aim of this review is to provide an insight into the promising candidate reactions for chemical Heat Storage application. The associated reversible chemical reactions available for thermal energy Storage systems are summarized. Ongoing research and development studies illustrate that chemical Heat Storage is a very favorable option for the different application when diverse promising candidate reactions are selected. As working temperature is one of the key parameters for thermal energy Storage systems, emphasis is given to the judgment of application temperature range for chemical Heat Storage. The determination of applicative temperature range of reversible chemical reactions is discussed. Besides, the challenge and prospect of the chemical Heat Storage Technology are analyzed in the paper.
Tomohiro Akiyama - One of the best experts on this subject based on the ideXlab platform.
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high temperature latent Heat Storage Technology to utilize exergy of solar Heat and industrial exhaust Heat
International Journal of Energy Research, 2017Co-Authors: Takahiro Nomura, Tomohiro AkiyamaAbstract:To utilize the exergy of solar and industrial exhaust Heat, latent Heat Storage (LHS) using phase change materials (PCM) is quite attractive for its high Heat Storage capacity, constant-temperature of the Heat supply, and repeatable utilization without degradation. In this article, general LHS Technology is outlined first; then recent advances in the uses of LHS for high-temperature applications (over 100 °C) are discussed, with respect to each type of PCM (e.g., sugar alcohol, molten salt, and alloy). The prospects of future LHS Technology are discussed regarding exergy.
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High‐temperature latent Heat Storage Technology to utilize exergy of solar Heat and industrial exhaust Heat
International Journal of Energy Research, 2016Co-Authors: Takahiro Nomura, Tomohiro AkiyamaAbstract:To utilize the exergy of solar and industrial exhaust Heat, latent Heat Storage (LHS) using phase change materials (PCM) is quite attractive for its high Heat Storage capacity, constant-temperature of the Heat supply, and repeatable utilization without degradation. In this article, general LHS Technology is outlined first; then recent advances in the uses of LHS for high-temperature applications (over 100 °C) are discussed, with respect to each type of PCM (e.g., sugar alcohol, molten salt, and alloy). The prospects of future LHS Technology are discussed regarding exergy.
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Macro-encapsulation of metallic phase change material using cylindrical-type ceramic containers for high-temperature thermal energy Storage
Applied Energy, 2016Co-Authors: Ryo Fukahori, Chunyu Zhu, Nan Sheng, Takahiro Nomura, Noriyuki Okinaka, Tomohiro AkiyamaAbstract:High-temperature Heat Storage is of growing importance for advanced solar energy utilization and waste Heat recovery systems. Latent Heat Storage Technology using alloys as phase change materials (PCM) is a promising option since it can achieve a thermal energy Storage system with high Heat Storage density and high Heat exchange rate because of the large latent Heat and high thermal conductivity of metallic PCMs. Encapsulation of PCM is essential for its successful use, however, the encapsulation is very difficult owing to the high corrosivity of the metallic PCM and its volume expansion during the solid-liquid phase change. So far, the Technology for encapsulating metallic PCMs has not been achieved. This study proposes the use of ceramic containers comprising a cap and a cup for macro-encapsulation of metallic PCMs, and a sealing method of the containers to endure the thermal stress from volume expansion during the phase change. The resulting PCM capsule has excellent corrosive resistance and cycling performance.
Zhengguo Zhang - One of the best experts on this subject based on the ideXlab platform.
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growth of the phase change enthalpy induced by the crystal transformation of an inorganic organic eutectic mixture of magnesium nitrate hexahydrate glutaric acid
Industrial & Engineering Chemistry Research, 2020Co-Authors: Shao Lin, Ziye Ling, Xiaoming Fang, Zhengguo ZhangAbstract:Developing phase change materials (PCMs) with high latent Heat is significant for latent Heat Storage Technology. Herein, an inorganic-organic eutectic mixture PCM of Mg(NO3)2•6H2O (MNH) and glutar...
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Growth of the Phase Change Enthalpy Induced by the Crystal Transformation of an Inorganic–Organic Eutectic Mixture of Magnesium Nitrate Hexahydrate–Glutaric Acid
Industrial & Engineering Chemistry Research, 2020Co-Authors: Li Suimin, Shao Lin, Ziye Ling, Xiaoming Fang, Zhengguo ZhangAbstract:Developing phase change materials (PCMs) with high latent Heat is significant for latent Heat Storage Technology. Herein, an inorganic-organic eutectic mixture PCM of Mg(NO3)2•6H2O (MNH) and glutar...
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Compounding MgCl₂·6H₂O with NH₄Al(SO₄)₂·12H₂O or KAl(SO₄)₂·12H₂O to Obtain Binary Hydrated Salts as High-Performance Phase Change Materials.
Molecules (Basel Switzerland), 2019Co-Authors: Wanchun Sun, Ziye Ling, Xiaoming Fang, Yan Zhou, Jinxin Feng, Zhengguo ZhangAbstract:Developing phase change materials (PCMs) with suitable phase change temperatures and high latent Heat is of great significance for accelerating the development of latent Heat Storage Technology to be applied in solar water Heating (SWH) systems. The phase change performances of two mixtures, NH₄Al(SO₄)₂·12H₂O-MgCl₂·6H₂O (mixture-A) and KAl(SO₄)₂·12H₂O-MgCl₂·6H₂O (mixture-B), were investigated in this paper. Based on the DSC results, the optimum contents of MgCl₂·6H₂O in mixture-A and mixture-B were determined to be 30 wt%. It is found that the melting points of mixture-A (30 wt% MgCl₂·6H₂O) and mixture-B (30 wt% MgCl₂·6H₂O) are 64.15 °C and 60.15 °C, respectively, which are suitable for SWH systems. Moreover, two mixtures have high latent Heat of up to 192.1 kJ/kg and 198.1 kJ/kg as well as exhibit little supercooling. After 200 cycles Heating-cooling experiments, the deviations in melting point and melting enthalpy of mixture-A are only 1.51% and 1.20%, respectively. Furthermore, the XRD patterns before and after the cycling experiments show that mixture-A possesses good structure stability. These excellent thermal characteristics make mixture-A show great potential for SWH systems.
T. Yan - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation on thermochemical Heat Storage using manganese chloride ammonia
Energy, 2018Co-Authors: T. Yan, R Z WangAbstract:Abstract Thermal energy Storage plays a key role in the application of renewable energy and low-grade thermal energy. A laboratory test unit of thermochemical Heat Storage with manganese chloride (MnCl2) as the reactive salt and ammonia (NH3) as the working gas was constructed, in which expanded graphite was used to improve the Heat and mass transfer performance of composite materials. The experimental campaigns show some promising conclusions on the Heat Storage performances of such a Storage unit. With 3.78 kg of composite materials, the highest thermochemical Heat Storage density is about 1391 kJ/kg when the charging and discharging temperature is 174 °C and 50 °C, respectively. The corresponding volume density of thermochemical Heat Storage is 179 kWh/m3. The maximum of thermochemical Heat Storage efficiency obtained is 48%. The maximum of instantaneous thermochemical Heat output power is more than 50 kW. The maximum for the average thermochemical Heat output power reaches to 9.9 kW under the experimental conditions. The application prospects of such a thermochemical Heat Storage system are presented. The promising results have been gained, but some problems must be envisaged. The improvement measures to overcome these problems are also brought forward in order to make the thermochemical Heat Storage Technology realize a successful application in practical systems.
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Experimental investigation on thermochemical Heat Storage using manganese chloride/ammonia
Energy, 2018Co-Authors: T. Yan, Ruzhu WangAbstract:Abstract Thermal energy Storage plays a key role in the application of renewable energy and low-grade thermal energy. A laboratory test unit of thermochemical Heat Storage with manganese chloride (MnCl2) as the reactive salt and ammonia (NH3) as the working gas was constructed, in which expanded graphite was used to improve the Heat and mass transfer performance of composite materials. The experimental campaigns show some promising conclusions on the Heat Storage performances of such a Storage unit. With 3.78 kg of composite materials, the highest thermochemical Heat Storage density is about 1391 kJ/kg when the charging and discharging temperature is 174 °C and 50 °C, respectively. The corresponding volume density of thermochemical Heat Storage is 179 kWh/m3. The maximum of thermochemical Heat Storage efficiency obtained is 48%. The maximum of instantaneous thermochemical Heat output power is more than 50 kW. The maximum for the average thermochemical Heat output power reaches to 9.9 kW under the experimental conditions. The application prospects of such a thermochemical Heat Storage system are presented. The promising results have been gained, but some problems must be envisaged. The improvement measures to overcome these problems are also brought forward in order to make the thermochemical Heat Storage Technology realize a successful application in practical systems.
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A review of promising candidate reactions for chemical Heat Storage
Renewable and Sustainable Energy Reviews, 2015Co-Authors: T. Yan, T. X. Li, L W Wang, R Z Wang, Liwei Wang, Ruzhu Wang, Ishugah T. FredAbstract:Thermal energy Storage is a necessary Technology for the application of renewable energy and low-grade thermal energy. Chemical Heat Storage has been proved to be a feasible and promising method to store thermal energy. As compared to other thermal energy Storage methods, chemical Heat Storage exhibits high energy Storage density as well as feasibility for long-duration energy Storage. In this paper, the basic principle of the chemical Heat Storage is firstly elaborated. Then the selection criteria of the chemical reaction are given. The aim of this review is to provide an insight into the promising candidate reactions for chemical Heat Storage application. The associated reversible chemical reactions available for thermal energy Storage systems are summarized. Ongoing research and development studies illustrate that chemical Heat Storage is a very favorable option for the different application when diverse promising candidate reactions are selected. As working temperature is one of the key parameters for thermal energy Storage systems, emphasis is given to the judgment of application temperature range for chemical Heat Storage. The determination of applicative temperature range of reversible chemical reactions is discussed. Besides, the challenge and prospect of the chemical Heat Storage Technology are analyzed in the paper.