Most of the data presented in the literature relate to saturation temperatures in the range - 20°C to 40°C due to the application in refrigeration technology. There is necessity to extend databases to higher values of saturation temperature due to new applications such as Organic Rankine Cycle and high temperature heat pumps. Only few papers contain data for high reduced pressure for low boiling point liquids. This paper focus on research conducted on boiling and heat transfer for various fluids for increased saturation temperature. With the increase in saturation temperature to and above critical values, reduced pressure increases, the density and viscosity of the vapor phase rises, while the opposite trend is noticed for the liquid phase. These influences directly contribute to velocity increase of liquid phase and reduction of the vapor phase, what results in similar values of the phase velocities. The increase in the reduced temperature also leads to reduction in surface tension, what renders decrease of Bond number and domination of gravitational forces. This paper presents overview of current research and conception of new testing facility.
Authors
Additional information
- Category
- Publikacja monograficzna
- Type
- rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
- Language
- polski
- Publication year
- 2020
