Local data of heat flux, wall temperature and the void phase along the boiling curve during vertical subcooled flow boiling of refrigerant Novec 649 at a copper wall
Abstract:This data set contains local experimental data of heat flux, wall temperature and void data profiles for vertical subcooled flow boiling of refrigerant Novec 649 at a copper wall. This data article presents average boiling curves from single-phase convection to fully developed film boiling for six combinations of mass flux and subcooling. Void profiles are provided for void fraction, void detection frequency, void velocity and void ligament size for three characteristic states along each boiling curve. Thermoc… Show more
“…The tested system had an output of 1 kW, and the supply temperature was 140 • C. The authors studied the effect of the circuit parameters on its efficiency using the mentioned working medium [13]. Bruder et al [14,15], on the other hand, conducted a study of the boiling process of this medium in a vertical copper channel. They conducted studies of the temperature distribution on the surface of the channel wall for different flow rates of the medium and performed temperature and heat flux studies using a fibre optic probe and thermocouples.…”
Section: Application Of Low-pressure Refrigerants In Scientific Researchmentioning
Nowadays, in addition to the thermodynamic properties of refrigerants, their impact on the environment is of high significance. Hence, it is important to use refrigerants with the lowest possible values of ozone depletion potential and global warming potential indices in refrigeration, organic Rankine cycle (ORC), air conditioning, and heat pump systems. Natural refrigerants are the most environmentally friendly; unfortunately, they have less favourable thermodynamic properties. Currently, low-pressure refrigerants from the FC (fluorocarbons, fluorine liquids) and HFE (hydrofluoroether) groups are increasingly used. This paper presents the most important properties and applications of selected refrigerants from these groups and also reviews the literature on their use.
“…The tested system had an output of 1 kW, and the supply temperature was 140 • C. The authors studied the effect of the circuit parameters on its efficiency using the mentioned working medium [13]. Bruder et al [14,15], on the other hand, conducted a study of the boiling process of this medium in a vertical copper channel. They conducted studies of the temperature distribution on the surface of the channel wall for different flow rates of the medium and performed temperature and heat flux studies using a fibre optic probe and thermocouples.…”
Section: Application Of Low-pressure Refrigerants In Scientific Researchmentioning
Nowadays, in addition to the thermodynamic properties of refrigerants, their impact on the environment is of high significance. Hence, it is important to use refrigerants with the lowest possible values of ozone depletion potential and global warming potential indices in refrigeration, organic Rankine cycle (ORC), air conditioning, and heat pump systems. Natural refrigerants are the most environmentally friendly; unfortunately, they have less favourable thermodynamic properties. Currently, low-pressure refrigerants from the FC (fluorocarbons, fluorine liquids) and HFE (hydrofluoroether) groups are increasingly used. This paper presents the most important properties and applications of selected refrigerants from these groups and also reviews the literature on their use.
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