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Showing 1 to 15 of 15 for “"sCO2"”.
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Benchmarking of a sCO2 Heat Exchanger Flow Loop
<p>Heat transfer of supercritical carbon dioxide (sCO2) was studied experimentally by commissioning a sCO2 flow loop featuring a horizontal tube-in-tube counterflow heat exchanger with a circular cross section. The main objective was to establish experimental heat transfer research capabilities for …
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Thermohydraulic Performance of Supercritical Carbon Dioxide (sCO2) in Horizontal Enhanced Surface Tubes
<p>Supercritical carbon dioxide (sCO2) has emerged as a promising working fluid for power generation and refrigeration systems due to its favorable thermophysical behavior near the pseudocritical region (Lemmon et al., 2018). However, in this region abrupt variations in density, viscosity, and …
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A biomass-fueled combined steam and sCO2 heat and power cycle for Southern African conditions
… efficiency cycle, such as the supercritical-CO2 (sCO2) Brayton cycle, with an existing industrial Rankine cycle and a biomass fired boiler may be an economical option to increase overall thermal efficiency and net generation. However, the integration of sCO2 heaters within the biomass boiler …
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Integrating fluidized bed heat exchangers and particle thermal energy storage with sCO₂ recompression Brayton cycles for concentrating solar power
… that implement supercritical carbon dioxide (sCO2) cycles at firing temperatures above 700°C. However, the design of effective particle-sCO2 HXs (HX) remains a challenge. Recent studies have explored how mild fluidization of gravity-fed particle flows can increase overall particle-sCO2 heat …
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Thermal Boundary Condition Effects On Local Supercritical CO2 Heat Transfer Trends In Tubes
<p>Supercritical carbon dioxide (sCO2) is a promising heat transfer fluid for the refrigeration and power generation industries due to its unique thermal properties and low environmental impact. To understand it as an alternative to traditional working fluids, the thermophysical and heat transfer …
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Design and Characterization of a High pressure Flow Loop for Heat Transfer Experiments of Supercritical Carbon Dioxide
<p>Supercritical carbon dioxide (sCO2) sees heightened heat transfer characteristics near its critical point due to its drastically changing thermophysical properties. Conventional single phase heat transfer theory was not developed to capture this nonlinear variation in properties and cannot …
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Thermofluid design and performance analysis of an air-cooled heat rejection system for a 50 MWe sCO2 concentrated solar power plant
… plants utilising supercritical carbon dioxide (sCO2) as a working fluid. This technology promises a more compact and efficient alternative to the current Rankine cycle based CSP plants. However, no such plant currently exists at the utility scale, and little is known about the heat rejection …
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On the Local Heat Transfer Behavior of Supercritical Carbon Dioxide
… behavior of supercritical carbon dioxide (sCO2) is performed. Flows relevant to heat transfer devices, such as sCO2 heaters, recuperators, and internally cooled turbine blades are studied, with particular attention paid to data reduction methodology, and the use of appropriate reference …
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Thermal Management with Supercritical Carbon Dioxide under Extreme Applications
… particularly supercritical carbon dioxide (sCO2), have received significant attention for various applications due to their unique thermodynamic properties near the critical point. By using sCO2 as a working fluid, systems can be more compact, achieve higher heat transfer coefficients, and …
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Design and analysis of a natural draft direct dry cooling system for a supercritical carbon dioxide power cycle for CSP application
… evaluated for a supercritical carbon dioxide (sCO2) power cycle for a concentrated solar power application. The system is configured to house both the precooler (PC) and intercooler (IC) heat exchangers within the same tower. Three numerical models are developed to simulate NDDDCS performance, …
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A reduced order modelling methodology for external cylindrical concentrated solar power central receivers
The use of supercritical carbon dioxide (sCO2) power cycles for concentrated solar power (CSP) applications is becoming increasingly attractive since these cycles may offer lower capital costs and increased thermal efficiency. However, there are currently no utility-scale sCO2-CSP tower plants in …
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Feasibility of supercritical CO2 coaxial heat exchanger geothermal well conversion with ECO2G technology
… the heat flow, temperature and pressure of the sCO2, and electricity production of each heat exchanger. With the electricity production, the NPV and IRR of Case A and Case B were performed, along with a sensitivity analysis. From this study, the feasibility of the project was determined.
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Surface Patterning and Rotordynamic Response of Annular Pressure Seals Used in Turbomachinery
… addition, supercritical state of carbon dioxide (sCO2) process fluid was examined as the working fluid in a preliminary study to better understand the effects on annular pressure seals. The results showed that the performance and stability in the annular pressure seals using sCO2 as process fluid …
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Design, Modeling and Characterization of a Multiscale Heat Exchanger for High-Temperature, High-Pressure Applications
… a supercritical CO2 Brayton cycle, using air and sCO2 as working fluids at 80 bar, 1300 °C and 250 bar, 300 °C, respectively. A multiscale channel design, enabled by ceramic co-extrusion, results in a counterflow heat exchanger core with both high thermal performance and high mechanical strength …
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Design of supercritical carbon dioxide centrifugal compressors
… nucleares. Tras este segundo impulso del ciclo SCO2, la comunidad científica focalizó gran parte de su esfuerzo en el desarrollo de la tecnología necesaria para llevarlo a la práctica, prueba de lo cual son las actualmente existentes instalaciones experimentales de SANDIA National Laboratories o …