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What is Supercritical Fluid

Chapter 7
Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
The fluid state that above some critical temperature and pressure point, where the fluid will never be liquefied by pressurization process. The fluid status is special as the solubility, flow viscosity, thermal conductivity, compressibility will have large changes during the transitions.
Published in Chapter:
Principles, Experiments, and Numerical Studies of Supercritical Fluid Natural Circulation System
Lin Chen (Institute of Engineering Thermophysics, Chinese Academy of Sciences, China & University of Chinese Academy of Sciences, China)
Copyright: © 2021 |Pages: 51
DOI: 10.4018/978-1-7998-5796-9.ch007
Abstract
Due to the unique thermal and transport properties, supercritical natural circulation loop (NCL, or thermosyphon) has been proposed in many energy systems, such as solar heater, nuclear cooling, waste heat recovery, geothermal, etc. This chapter presents the principals of supercritical natural circulation loop and its application challenges. A specially designed experimental prototype system is introduced and compared with numerical findings. The system is operated in wide range of pressures from around 6.0 MPa to 15.0 MPa in the near-critical region. It is found that in a supercritical natural circulation system, very high Reynolds number natural convection flow can be achieved only by simple heating and cooling. Thermal performance analysis and parameter effects are carried out along with the experimental development. The heat transfer dependency on operation and its mechanisms are also explained and summarized in this chapter. The comparison of experimental and numerical results contributes to better understanding of NCL stability phenomena and applications in energy systems.
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More Results
Chapter 13
Study on Cooling Heat Transfer of Supercritical Carbon Dioxide Applied to Transcritical Carbon Dioxide Heat Pump
A fluid at a pressure higher than the critical pressure and at a temperature higher than the critical temperature. However, in the present chapter, a term “supercritical fluid” includes both “supercritical fluid” and “compressed fluid”.
Published in Chapter: Study on Cooling Heat Transfer of Supercritical Carbon Dioxide Applied to Transcritical Carbon Dioxide Heat Pump; From: Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
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Chapter 1
Biodiesel Production: Processes and Technologies
Any substance at a temperature and pressure above its critical point.
Published in Chapter: Biodiesel Production: Processes and Technologies; From: Recent Technologies for Enhancing Performance and Reducing Emissions in Diesel Engines
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Chapter 15
Supercritical Carbon Dioxide Fluid and Its Application to Rankine Cycle
A state that temperature and pressure of substance above its critical point, where the distinct liquid and gas phase do not contain.
Published in Chapter: Supercritical Carbon Dioxide Fluid and Its Application to Rankine Cycle; From: Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
Full Text Chapter Download: US $37.50 Add to Cart
Chapter 19
The Basic Thermal Hydraulic Issues of Applying Supercritical Fluid to Nuclear Reactors
Normally, the fluid with its pressures and temperatures higher than the critical pressure and critical temperature. However, in this chapter, the supercritical fluid includes both the temperature below and above the critical temperature as long as the pressure is above the critical pressure.
Published in Chapter: The Basic Thermal Hydraulic Issues of Applying Supercritical Fluid to Nuclear Reactors; From: Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
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Chapter 12
High-Power Heat Transfer in Supercritical Fluids: Microscale Times and Sizes
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Chapter 16
Supercritical Fluids and Their Applications in Power Generation
A supercritical fluid is a fluid at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist.
Published in Chapter: Supercritical Fluids and Their Applications in Power Generation; From: Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
Full Text Chapter Download: US $37.50 Add to Cart
Chapter 17
Application of Supercritical Fluids in Thermal- and Nuclear-Power Engineering
Is the fluid at pressures and temperatures that are higher than the critical pressure and critical temperature. However, in the present Chapter, the term supercritical fluid usually includes both terms - a supercritical fluid and compressed fluid.
Published in Chapter: Application of Supercritical Fluids in Thermal- and Nuclear-Power Engineering; From: Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems
Full Text Chapter Download: US $37.50 Add to Cart
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