Conveners
C3OrC - Mixed Gases
- Jacob Leachman (Washington State University)
- John Pfotenhauer (University of Wisconsin - Madison)
Ian Richardson
(Washington State University)
7/1/15, 11:00 AM
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Although cryogenic helium-hydrogen mixture properties remain essential to modeling long-duration propellant storage, the property measurements and models have not been extensively studied in nearly 50 years. The majority of the available measurements are vapor-liquid-equilibrium (VLE) with little or no pressure-volume-temperature-composition (PVT-x) measurements which are important for...
Sastry Pamidi
(The Florida State University)
7/1/15, 11:15 AM
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Various high temperature superconducting (HTS) power system components have been demonstrated using liquid nitrogen as the cryogen. Gaseous helium is being explored as a viable option for cooling HTS power devices. One of the major advantages of using helium is the versatility of operating temperature of HTS systems that provides adaptable and compact power distribution networks. However,...
Rodrigo Barraza
(University of Wisconsin-Madison)
7/1/15, 11:30 AM
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The use of mixed gas working fluids has become common in Joule–Thomson (JT) type cryocoolers for a variety of applications in the cooling temperature range from 80 to 230 K. The thermal efficiency of mixed gas JT cryocoolers is dependent on the optimization of the gas mixture composition. Most optimization methodologies focus on thermodynamic criteria of the cycle because there are very...
Mr
Jacob Hinze
(University of Wisconsin-Madison)
7/1/15, 11:45 AM
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Mixed refrigerant (MR) working fluids can significantly increase the cooling capacity of a Joule Thomson (JT) cycle. The optimization of MRJT systems has been the subject of substantial research. However, most optimization techniques do not model the recuperator in sufficient detail. For example, the recuperator is usually assumed to have a heat transfer coefficient does not vary with the ...
Raluca Dumitrescu
(Eindhoven University of Technology)
7/1/15, 12:00 PM
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
We evaluate the feasibility of the natural gas liquefaction process with very limited gas treatment or heavy carbons removal. Such reduction in system processing would significantly reduce treatment steps and thus also maintenance costs. Phase transitions in a binary gas mixture of carbon dioxide and methane need be determined. In order to do so, we first focus on homogeneous nucleation...
