Steady-State Parallel Plate Apparatus for Measurement of Diffusion Coefficient in Supercritical Carbon Dioxide

1999 ◽  
Vol 38 (2) ◽  
pp. 554-561 ◽  
Author(s):  
Dang Quoc Tuan ◽  
Meryem E. Yener ◽  
J. A. Zollweg ◽  
P. Harriott ◽  
Syed S. H. Rizvi
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Coefficient ◽  
Steady State ◽  
Supercritical Carbon Dioxide ◽  
Parallel Plate ◽  
Plate Apparatus ◽  
Supercritical Carbon

scholarly journals Steady State Supercritical Carbon Dioxide Recompression Closed Brayton Cycle Operating Point Comparison With Predictions

2014 ◽  
Author(s):  
Jim Pasch ◽  
Tom Conboy ◽  
Darryn Fleming ◽  
Matt Carlson ◽  
Gary Rochau
Keyword(s):  
Carbon Dioxide ◽  
Steady State ◽  
Supercritical Carbon Dioxide ◽  
Computer Model ◽  
Model Verification ◽  
Operating Point ◽  
Brayton Cycle ◽  
Assembly Design ◽  
Test Assembly ◽  
Supercritical Carbon

The U.S. Department of Energy Office of Nuclear Energy (DOE-NE) supercritical carbon dioxide recompression closed Brayton cycle (RCBC) test assembly (TA) construction has been completed to its original design and resides at Sandia National Laboratories, New Mexico. Commissioning tests were completed in July 2012, followed by a number of tests in both the recompression CBC configuration, and in a bottoming cycle configuration that is proprietary to a current customer. While the test assembly has been developed and installed to support testing, a computer model of the loop, written in Fortran programming language, has also been developed. The purpose of this iterative model is to facilitate data interpretation, guide test assembly design modifications, develop control schemes, and serve as a foundation from which to develop a transient model. Of central utility is its modular nature, which has already been leveraged to develop a customer’s bottoming cycle configuration. Verification that the model uses appropriate physical representations of components and processes, is performing as intended, and validation that the model accurately reproduces test data, are necessary activities. Completion of the model’s verification and validation (V&V) supports the long-term goal of commercializing the RCBC for a sodium fast reactor. This paper presents verification results of certain subprocesses of the iterative computer model. Verification of these subprocesses was completed with positive results. While an adequate range of data for complete and thorough validation do not yet exist, comparison of subprocess predictions with data from a single, representative operating point are presented as are explanations for differences. Recommendations for activities necessary to complete subprocess and model validation are given. The RCBC iterative computer model V&V process should be revisited following completion of these recommended actions and the generation of steady state data while operating near the test assembly design point.

Concentration Dependence of the Diffusion Coefficient of Lipid in Supercritical Carbon Dioxide

1999 ◽  
Vol 38 (7) ◽  
pp. 2787-2793 ◽  
Author(s):  
Dang Q. Tuan ◽  
John A. Zollweg ◽  
Syed S. H. Rizvi
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Coefficient ◽  
Supercritical Carbon Dioxide ◽  
Concentration Dependence ◽  
Supercritical Carbon

Steady-State Power Operation of a Supercritical Carbon Dioxide Brayton Cycle With Thermal-Hydraulic Control

2016 ◽  
Author(s):  
Eric M. Clementoni ◽  
Timothy L. Cox ◽  
Martha A. King
Keyword(s):  
Carbon Dioxide ◽  
Steady State ◽  
Supercritical Carbon Dioxide ◽  
Integrated System ◽  
Working Fluid ◽  
Stable Steady State ◽  
Brayton Cycle ◽  
Hydraulic Control ◽  
Wide Range ◽  
Supercritical Carbon

The Bechtel Marine Propulsion Corporation (BMPC) Integrated System Test (IST) is a two shaft recuperated closed Brayton cycle using supercritical carbon dioxide (sCO2) as the working fluid. The IST is a simple recuperated Brayton cycle with a variable speed turbine driven compressor and a constant speed turbine driven generator designed to output 100 kWe. The main focus of the IST is to demonstrate operational, control, and performance characteristics of an sCO2 Brayton power cycle over a wide range of conditions. IST operation has reached the point where the system can be run with the turbine-compressor thermal-hydraulically balanced so that the net power of the cycle is equal to the turbine-generator output. In this operating mode, power level is changed by using the compressor recirculation valve to adjust the fraction of compressor flow that goes to the turbines as well as the compressor pressure ratio. Steady-state operational data and trends are presented at various system power levels from near zero net cycle power to maximum operating power using a simplified thermal-hydraulic based control method. Confirmation of stable steady-state operation of the system with automatic thermal-hydraulic control is also discussed.

Measurement of binary diffusion coefficient and solubility estimation for dyes in supercritical carbon dioxide by CIR method

2016 ◽  
Vol 420 ◽  
pp. 7-13 ◽  
Author(s):  
Toshitaka Funazukuri ◽  
Taichi Yamasaki ◽  
Minori Taguchi ◽  
Chang Yi Kong
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Coefficient ◽  
Supercritical Carbon Dioxide ◽  
Binary Diffusion Coefficient ◽  
Binary Diffusion ◽  
Solubility Estimation ◽  
Supercritical Carbon

Effect of supercritical carbon dioxide on the diffusion coefficient of phenol in poly(bisphenol A carbonate)

2003 ◽  
Vol 41 (11) ◽  
pp. 1143-1156 ◽  
Author(s):  
Chunmei Shi ◽  
George W. Roberts ◽  
Douglas J. Kiserow
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Coefficient ◽  
Supercritical Carbon Dioxide ◽  
Bisphenol A ◽  
Supercritical Carbon
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