The Experts below are selected from a list of 432 Experts worldwide ranked by ideXlab platform
John H Lienhard - One of the best experts on this subject based on the ideXlab platform.
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multistage Pressure retarded osmosis configurations a unifying framework and thermodynamic analysis
Desalination, 2020Co-Authors: Hyung Won Chung, Jaichander Swaminathan, John H LienhardAbstract:Abstract Pressure-retarded osmosis has enjoyed increasing research interest over the last decade. Recent studies focusing on single-stage PRO designs have raised doubts regarding the long-term economic viability of the technology. While most of the analyses are based on single-stage operation, comprehensive analysis of multistage PRO which shows promise for better energetic performance is absent. Previous studies on multistage PRO differ in their design philosophies and performance metrics, leading to an incomplete assessment regarding the potential benefits of multistaging. In this paper, we develop a unifying framework to classify several existing multistage configurations. In addition, we analyze the multistage PRO system from a thermodynamic perspective. Among the two major multistage design strategies, namely Interstage Pressure control and independent feed inputs to each stage, we found the latter to be more effective towards increasing net power density. In comparison to a single-stage device, a 10-stage system achieves around 9% higher net power density while using the same membrane area.
Hyung Won Chung - One of the best experts on this subject based on the ideXlab platform.
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multistage Pressure retarded osmosis configurations a unifying framework and thermodynamic analysis
Desalination, 2020Co-Authors: Hyung Won Chung, Jaichander Swaminathan, John H LienhardAbstract:Abstract Pressure-retarded osmosis has enjoyed increasing research interest over the last decade. Recent studies focusing on single-stage PRO designs have raised doubts regarding the long-term economic viability of the technology. While most of the analyses are based on single-stage operation, comprehensive analysis of multistage PRO which shows promise for better energetic performance is absent. Previous studies on multistage PRO differ in their design philosophies and performance metrics, leading to an incomplete assessment regarding the potential benefits of multistaging. In this paper, we develop a unifying framework to classify several existing multistage configurations. In addition, we analyze the multistage PRO system from a thermodynamic perspective. Among the two major multistage design strategies, namely Interstage Pressure control and independent feed inputs to each stage, we found the latter to be more effective towards increasing net power density. In comparison to a single-stage device, a 10-stage system achieves around 9% higher net power density while using the same membrane area.
Jaichander Swaminathan - One of the best experts on this subject based on the ideXlab platform.
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multistage Pressure retarded osmosis configurations a unifying framework and thermodynamic analysis
Desalination, 2020Co-Authors: Hyung Won Chung, Jaichander Swaminathan, John H LienhardAbstract:Abstract Pressure-retarded osmosis has enjoyed increasing research interest over the last decade. Recent studies focusing on single-stage PRO designs have raised doubts regarding the long-term economic viability of the technology. While most of the analyses are based on single-stage operation, comprehensive analysis of multistage PRO which shows promise for better energetic performance is absent. Previous studies on multistage PRO differ in their design philosophies and performance metrics, leading to an incomplete assessment regarding the potential benefits of multistaging. In this paper, we develop a unifying framework to classify several existing multistage configurations. In addition, we analyze the multistage PRO system from a thermodynamic perspective. Among the two major multistage design strategies, namely Interstage Pressure control and independent feed inputs to each stage, we found the latter to be more effective towards increasing net power density. In comparison to a single-stage device, a 10-stage system achieves around 9% higher net power density while using the same membrane area.
Lienhard, John H - One of the best experts on this subject based on the ideXlab platform.
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Multistage Pressure-retarded osmosis configurations: A unifying framework and thermodynamic analysis
'Elsevier BV', 2020Co-Authors: Chung, Hyung Won, Swaminathan Jaichander, Lienhard, John HAbstract:Pressure-retarded osmosis has enjoyed increasing research interest over the last decade. Recent studies focusing on single-stage PRO designs have raised doubts regarding the long-term economic viability of the technology. While most of the analyses are based on single-stage operation, comprehensive analysis of multistage PRO which shows promise for better energetic performance is absent. Previous studies on multistage PRO differ in their design philosophies and performance metrics, leading to an incomplete assessment regarding the potential benefits of multistaging. In this paper, we develop a unifying framework to classify several existing multistage configurations. In addition, we analyze the multistage PRO system from a thermodynamic perspective. Among the two major multistage design strategies, namely Interstage Pressure control and independent feed inputs to each stage, we found the latter to be more effective towards increasing net power density. In comparison to a single-stage device, a 10-stage system achieves around 9% higher net power density while using the same membrane area.Kuwait Foundation for the Advancement of Sciences (Grant P31475EC01
Mani Sankar Dasgupta - One of the best experts on this subject based on the ideXlab platform.
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comparative study of cycle modification strategies for trans critical co2 refrigeration cycle for warm climatic conditions
Case Studies in Thermal Engineering, 2016Co-Authors: Simarpreet Singh, Nilesh Purohit, Mani Sankar DasguptaAbstract:Abstract This paper presents a comparative study of performance of six prominent modifications on the basic trans-critical CO 2 refrigeration system to investigate their suitability to high ambient temperature application (35–55 °C). To explore the application in chiller, domestic refrigeration and air cooling the evaporator temperature chosen are −10 °C, 0 °C and 10 °C respectively. In general the cycle modifications have a positive effect on the overall COP of the system. However, to comprehend practicability of these modifications for three application areas, a few other parameters which affect design and operation are also included in the study. These are compressor discharge Pressure and temperature, mass flow rate, Interstage Pressure for multi-stage operation and exergy destruction. Effect of real time constraints like approach temperature, Pressure drop in gas cooler, compressors efficieny, degree of superheat, expanders efficiency and effectivenesss of intermediate heat exchanger are also incorporated. Interrelation between these parameters are brought out from the study.
