scholarly journals Thermophysical Properties of Mixtures Containing Supercritical Fluids.

Netsu Bussei ◽  
1993 ◽  
Vol 7 (1) ◽  
pp. 41-45
Author(s):  
Hirokatsu Masuoka
Keyword(s):  
Supercritical Fluids ◽  
Thermophysical Properties

Analysis of Thermophysical Properties for Selected Supercritical Fluids

2014 ◽  
Author(s):  
Juan Carlos Jouvin ◽  
Jeffrey Samuel ◽  
Igor Pioro
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Fluids ◽  
Supercritical Water ◽  
Fast Reactor ◽  
Thermophysical Properties ◽  
Power Plants ◽  
Operating Conditions ◽  
Effect Of Temperature ◽  
Working Fluids ◽  
R 134A

Currently, there are six Generation IV reactor systems under development worldwide: 1) Very-High-Temperature Reactor (VHTR); 2) Sodium-cooled Fast Reactor (SFR); 3) SuperCritical Water-cooled Reactor (SCWR), 4) Gas-cooled Fast Reactor (GFR), 5) Lead-cooled Fast Reactor (LFR); and 6) Molten Salt Reactor (MSR). Of these six systems, Canada has decided to pursue the SCWR as its choice for a Generation IV reactor, with some research being conducted on the VHTR. One main objective of SCWRs is to increase the thermal efficiency of current nuclear power plants from the 30–35% range to approximately 45–50%. In order to accomplish this, SCWRs are being designed to operate well above the critical point of water at pressures of 25 MPa and reactor outlet temperatures up to 625°C. These operating conditions also make the SCWR, along with the VHTR and other Generation IV systems, suitable candidates to support thermochemical hydrogen cogeneration. The design and operation of a facility capable of accurately and safely conducting experiments in supercritical water is a very expensive task. In order to facilitate our understanding of supercritical heat-transfer phenomena, modeling fluids such as carbon dioxide, refrigerants, ammonia and helium can be used to complement our knowledge of supercritical fluids. Some of these fluids, namely helium and carbon dioxide, have also been considered as potential working fluids in some special designs of reactors and power cycles. The objective of this paper is to investigate the feasibility of using alternative working fluids such as helium and Refrigerant-134a (R-134a) by comparing the fluid and transport properties with those of water. Operating conditions of SCWRs are scaled into those of the modeling fluid, R-134a, in order to provide proper SCWR-equivalent conditions. The equivalent properties for helium, which is one possible coolant for the VHTR, are also discussed. The thermophysical properties for selected working fluids are obtained from NIST REFPROP software. The results indicate that the thermophysical properties of the fluids undergo significant changes within the critical and pseudocritical regions similar to that of supercritical water. A sensitivity analysis for the effect of temperature on selected thermophysical properties at various supercritical pressures was performed.

scholarly journals Structural Transition in Supercritical Fluids

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Boris I. Sedunov
Keyword(s):  
Supercritical Fluids ◽  
Thermophysical Properties ◽  
Structural Transition ◽  
Heat Capacities ◽  
Saturation Curve ◽  
Physical Sense ◽  
Supercritical Region

The extension of the saturation curve on the PT diagram in the supercritical region for a number of monocomponent supercritical fluids by peak values for different thermophysical properties, such as heat capacities and and compressibility has been studied. These peaks signal about some sort of fluid structural transition in the supercritical region. Different methods give similar but progressively diverging curves for this transition. The zone of temperatures and pressures near these curves can be named as the zone of the fluid structural transition. The outstanding properties of supercritical fluids in this zone help to understand the physical sense of the fluid structural transition.

DEVELOPMENT OF POLYMER COMPOSITES WITH IMPROVED THERMOPHYSICAL PROPERTIES FOR SHIPBUILDING AND SHIP REPAIR

2019 ◽  
Vol 10 (2) ◽  
pp. 117-134 ◽  
Author(s):  
A. V. Akimov ◽  
A. V. Buketov ◽  
А. А. Sapronov ◽  
Mykola V. Brailo ◽  
S. V. Yakushchenko ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Thermophysical Properties ◽  
Ship Repair
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