The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Yi Jiang - One of the best experts on this subject based on the ideXlab platform.
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Method for integrating low-grade Industrial Waste heat into district heating network
Building Simulation, 2016Co-Authors: Jianjun Xia, Kan Zhu, Yi JiangAbstract:Low-grade Industrial Waste heat could be a considerable potential energy source for district heating, on the condition that the heat from different Industrial Waste heat sources is integrated properly. This study considers a method for integrating low-grade Industrial Waste heat into a district heating system and focuses on how to improve the outlet temperature of heat-collecting water by optimizing the heat exchange flow for process integration. The pinch analysis concept is considered, and a newly developed thermal theory called entransy analysis is introduced. By using entransy dissipation to describe the energy quality loss during the heat integration, this study analyzes how heat exchange flows influence the final outlet water temperature and attempts to provide an efficient method to optimize the heat exchange flow. Finally, the effectiveness of the proposed methodology is demonstrated by testing it in a project involving the recovery of Waste heat from a copper plant for district heating.
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Key issues and solutions in a district heating system using low-grade Industrial Waste heat
Energy, 2015Co-Authors: Hao Fang, Jianjun Xia, Yi JiangAbstract:Industrial Waste heat is increasingly being recognized as an important source of heat for DH (district heating) systems in cold regions to fill shortfalls in heating requirements, while consuming less fossil energy than with conventional heating sources. Most existing cases of Industrial Waste heat utilization for heating merely focus on heat recovery from a single Waste heat source for heating either in the factory in which the heat is generated or other buildings in the vicinity. The purpose of this paper is to discuss the key issues related to a DH system using two or more kinds of low-grade Industrial Waste heat, at a temperature between 20 °C and 90 °C, for users a long distance away from the heat sources, including the collection and integration of multiple-grade Waste heat sources, long-distance delivery of Waste heat, and peak shaving of the system. Solutions to these three issues are proposed to increase the efficiency of the system and for further and better promotion of such a system: 1) "Tangency technology" is designed and applied to find the optimal method of collecting heat from multiple Waste heat sources. 2) Lowering the temperature of the return water on the primary side has been proven to be crucial to the collection and long-distance delivery of Industrial Waste heat. 3) Systems integrating both Industrial Waste heat and fossil-fuel heat are depicted. Industrial Waste heat always provides the base load for the DH system, while the fossil-fuel heat acts as the peak shaver. Lastly, a case study undertaken in Chifeng in northern China demonstrates how these solutions act in a first-ever DH demonstration project using multiple sources of Waste heat from a copper smelter. In all, 390,000 GJ of Waste heat was recovered, 35,000 t of CO2emission was reduced, and over 150,000 t of water was saved.
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Industrial Waste heat utilization for low temperature district heating
Energy Policy, 2013Co-Authors: Hao Fang, Yingbo Su, Yi JiangAbstract:Large quantities of low grade Waste heat are discharged into the environment, mostly via water evaporation, during Industrial processes. Putting this Industrial Waste heat to productive use can reduce fossil fuel usage as well as CO2 emissions and water dissipation. The purpose of this paper is to propose a holistic approach to the integrated and efficient utilization of low-grade Industrial Waste heat. Recovering Industrial Waste heat for use in district heating (DH) can increase the efficiency of the Industrial sector and the DH system, in a cost-efficient way defined by the index of investment vs. carbon reduction (ICR). Furthermore, low temperature DH network greatly benefits the recovery rate of Industrial Waste heat. Based on data analysis and in-situ investigations, this paper discusses the potential for the implementation of such an approach in northern China, where conventional heat sources for DH are insufficient. The universal design approach to Industrial-Waste-heat based DH is proposed. Through a demonstration project, this approach is introduced in detail. This study finds three advantages to this approach: (1) improvement of the thermal energy efficiency of Industrial factories; (2) more cost-efficient than the traditional heating mode; and (3) CO2 and pollutant emission reduction as well as water conservation.
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Industrial Waste heat utilization for low temperature district heating
Energy Policy, 2013Co-Authors: Hao Fang, Kan Zhu, J J Xia, Y B Su, Yi JiangAbstract:Large quantities of low grade Waste heat are discharged into the environment, mostly via water evaporation, during Industrial processes. Putting this Industrial Waste heat to productive use can reduce fossil fuel usage as well as CO2 emissions and water dissipation. The purpose of this paper is to propose a holistic approach to the integrated and efficient utilization of low-grade Industrial Waste heat. Recovering Industrial Waste heat for use in district heating (DH) can increase the efficiency of the Industrial sector and the DH system, in a cost-efficient way defined by the index of investment vs. carbon reduction (ICR). Furthermore, low temperature DH network greatly benefits the recovery rate of Industrial Waste heat. Based on data analysis and in-situ investigations, this paper discusses the potential for the implementation of such an approach in northern China, where conventional heat sources for DH are insufficient. The universal design approach to Industrial-Waste-heat based DH is proposed. Through a demonstration project, this approach is introduced in detail. This study finds three advantages to this approach: (1) improvement of the thermal energy efficiency of Industrial factories; (2) more cost-efficient than the traditional heating mode; and (3) CO2 and pollutant emission reduction as well as water conservation. (C) 2013 Elsevier Ltd. All rights reserved.
Hao Fang - One of the best experts on this subject based on the ideXlab platform.
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Key issues and solutions in a district heating system using low-grade Industrial Waste heat
Energy, 2015Co-Authors: Hao Fang, Jianjun Xia, Yi JiangAbstract:Industrial Waste heat is increasingly being recognized as an important source of heat for DH (district heating) systems in cold regions to fill shortfalls in heating requirements, while consuming less fossil energy than with conventional heating sources. Most existing cases of Industrial Waste heat utilization for heating merely focus on heat recovery from a single Waste heat source for heating either in the factory in which the heat is generated or other buildings in the vicinity. The purpose of this paper is to discuss the key issues related to a DH system using two or more kinds of low-grade Industrial Waste heat, at a temperature between 20 °C and 90 °C, for users a long distance away from the heat sources, including the collection and integration of multiple-grade Waste heat sources, long-distance delivery of Waste heat, and peak shaving of the system. Solutions to these three issues are proposed to increase the efficiency of the system and for further and better promotion of such a system: 1) "Tangency technology" is designed and applied to find the optimal method of collecting heat from multiple Waste heat sources. 2) Lowering the temperature of the return water on the primary side has been proven to be crucial to the collection and long-distance delivery of Industrial Waste heat. 3) Systems integrating both Industrial Waste heat and fossil-fuel heat are depicted. Industrial Waste heat always provides the base load for the DH system, while the fossil-fuel heat acts as the peak shaver. Lastly, a case study undertaken in Chifeng in northern China demonstrates how these solutions act in a first-ever DH demonstration project using multiple sources of Waste heat from a copper smelter. In all, 390,000 GJ of Waste heat was recovered, 35,000 t of CO2emission was reduced, and over 150,000 t of water was saved.
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Industrial Waste heat utilization for low temperature district heating
Energy Policy, 2013Co-Authors: Hao Fang, Yingbo Su, Yi JiangAbstract:Large quantities of low grade Waste heat are discharged into the environment, mostly via water evaporation, during Industrial processes. Putting this Industrial Waste heat to productive use can reduce fossil fuel usage as well as CO2 emissions and water dissipation. The purpose of this paper is to propose a holistic approach to the integrated and efficient utilization of low-grade Industrial Waste heat. Recovering Industrial Waste heat for use in district heating (DH) can increase the efficiency of the Industrial sector and the DH system, in a cost-efficient way defined by the index of investment vs. carbon reduction (ICR). Furthermore, low temperature DH network greatly benefits the recovery rate of Industrial Waste heat. Based on data analysis and in-situ investigations, this paper discusses the potential for the implementation of such an approach in northern China, where conventional heat sources for DH are insufficient. The universal design approach to Industrial-Waste-heat based DH is proposed. Through a demonstration project, this approach is introduced in detail. This study finds three advantages to this approach: (1) improvement of the thermal energy efficiency of Industrial factories; (2) more cost-efficient than the traditional heating mode; and (3) CO2 and pollutant emission reduction as well as water conservation.
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Industrial Waste heat utilization for low temperature district heating
Energy Policy, 2013Co-Authors: Hao Fang, Kan Zhu, J J Xia, Y B Su, Yi JiangAbstract:Large quantities of low grade Waste heat are discharged into the environment, mostly via water evaporation, during Industrial processes. Putting this Industrial Waste heat to productive use can reduce fossil fuel usage as well as CO2 emissions and water dissipation. The purpose of this paper is to propose a holistic approach to the integrated and efficient utilization of low-grade Industrial Waste heat. Recovering Industrial Waste heat for use in district heating (DH) can increase the efficiency of the Industrial sector and the DH system, in a cost-efficient way defined by the index of investment vs. carbon reduction (ICR). Furthermore, low temperature DH network greatly benefits the recovery rate of Industrial Waste heat. Based on data analysis and in-situ investigations, this paper discusses the potential for the implementation of such an approach in northern China, where conventional heat sources for DH are insufficient. The universal design approach to Industrial-Waste-heat based DH is proposed. Through a demonstration project, this approach is introduced in detail. This study finds three advantages to this approach: (1) improvement of the thermal energy efficiency of Industrial factories; (2) more cost-efficient than the traditional heating mode; and (3) CO2 and pollutant emission reduction as well as water conservation. (C) 2013 Elsevier Ltd. All rights reserved.
B Hu - One of the best experts on this subject based on the ideXlab platform.
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a high efficient centrifugal heat pump with Industrial Waste heat recovery for district heating
Applied Thermal Engineering, 2017Co-Authors: B Hu, R. Z. Wang, Hongbo Li, Zhiping Zhang, Sheng WangAbstract:Abstract The urban construction area and heating energy consumption in northern China have been increasing greatly in recent years. At the same time, a large amount of low-grade Industrial Waste heat is released directly to the environment in most Industrial plants. To meet the district heating demands and recover the Industrial Waste heat simultaneously, high-efficiency centrifugal heat pumps are applied for district heating and heat recovery. A permanent-magnetic synchronous frequency-convertible (PSF) centrifugal heat pump is developed which has a much higher COP in comparison with that of conventional heat pumps. In a district heating project with Waste heat recovery from industry, testing results have shown that COP of a 500RT PSF centrifugal heat pump could reach 7.1, and the total system COP of the district heating system reaches 4.8. The operating cost for one heating season is just 40.3% of gas-fired boiler heating system. The emission of Carbon Dioxide is reduced by 60.6% and 56.3% when compared with coal-fired boiler and gas-fired boiler heating system, respectively. This shows that application of PSF centrifugal heat pumps to recover the low-grade Industrial Waste heat for district heating are quite attractive in the north of China cities.
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A high-efficient centrifugal heat pump with Industrial Waste heat recovery for district heating
Applied Thermal Engineering, 2017Co-Authors: B Hu, Heng Liu, Zhaohui Zhang, R. Z. Wang, Hui Li, Shijing WangAbstract:© 2017 Elsevier Ltd The urban construction area and heating energy consumption in northern China have been increasing greatly in recent years. At the same time, a large amount of low-grade Industrial Waste heat is released directly to the environment in most Industrial plants. To meet the district heating demands and recover the Industrial Waste heat simultaneously, high-efficiency centrifugal heat pumps are applied for district heating and heat recovery. A permanent-magnetic synchronous frequency-convertible (PSF) centrifugal heat pump is developed which has a much higher COP in comparison with that of conventional heat pumps. In a district heating project with Waste heat recovery from industry, testing results have shown that COP of a 500RT PSF centrifugal heat pump could reach 7.1, and the total system COP of the district heating system reaches 4.8. The operating cost for one heating season is just 40.3% of gas-fired boiler heating system. The emission of Carbon Dioxide is reduced by 60.6% and 56.3% when compared with coal-fired boiler and gas-fired boiler heating system, respectively. This shows that application of PSF centrifugal heat pumps to recover the low-grade Industrial Waste heat for district heating are quite attractive in the north of China cities.
Sheng Wang - One of the best experts on this subject based on the ideXlab platform.
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a high efficient centrifugal heat pump with Industrial Waste heat recovery for district heating
Applied Thermal Engineering, 2017Co-Authors: B Hu, R. Z. Wang, Hongbo Li, Zhiping Zhang, Sheng WangAbstract:Abstract The urban construction area and heating energy consumption in northern China have been increasing greatly in recent years. At the same time, a large amount of low-grade Industrial Waste heat is released directly to the environment in most Industrial plants. To meet the district heating demands and recover the Industrial Waste heat simultaneously, high-efficiency centrifugal heat pumps are applied for district heating and heat recovery. A permanent-magnetic synchronous frequency-convertible (PSF) centrifugal heat pump is developed which has a much higher COP in comparison with that of conventional heat pumps. In a district heating project with Waste heat recovery from industry, testing results have shown that COP of a 500RT PSF centrifugal heat pump could reach 7.1, and the total system COP of the district heating system reaches 4.8. The operating cost for one heating season is just 40.3% of gas-fired boiler heating system. The emission of Carbon Dioxide is reduced by 60.6% and 56.3% when compared with coal-fired boiler and gas-fired boiler heating system, respectively. This shows that application of PSF centrifugal heat pumps to recover the low-grade Industrial Waste heat for district heating are quite attractive in the north of China cities.
Shijing Wang - One of the best experts on this subject based on the ideXlab platform.
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A high-efficient centrifugal heat pump with Industrial Waste heat recovery for district heating
Applied Thermal Engineering, 2017Co-Authors: B Hu, Heng Liu, Zhaohui Zhang, R. Z. Wang, Hui Li, Shijing WangAbstract:© 2017 Elsevier Ltd The urban construction area and heating energy consumption in northern China have been increasing greatly in recent years. At the same time, a large amount of low-grade Industrial Waste heat is released directly to the environment in most Industrial plants. To meet the district heating demands and recover the Industrial Waste heat simultaneously, high-efficiency centrifugal heat pumps are applied for district heating and heat recovery. A permanent-magnetic synchronous frequency-convertible (PSF) centrifugal heat pump is developed which has a much higher COP in comparison with that of conventional heat pumps. In a district heating project with Waste heat recovery from industry, testing results have shown that COP of a 500RT PSF centrifugal heat pump could reach 7.1, and the total system COP of the district heating system reaches 4.8. The operating cost for one heating season is just 40.3% of gas-fired boiler heating system. The emission of Carbon Dioxide is reduced by 60.6% and 56.3% when compared with coal-fired boiler and gas-fired boiler heating system, respectively. This shows that application of PSF centrifugal heat pumps to recover the low-grade Industrial Waste heat for district heating are quite attractive in the north of China cities.