The combination of deep learning and LDIWPSO can predict and optimize the maximum isentropic efficiency for vortex pump with high precision. It also provides a reference for the maximum value of vortex pump isentropic efficiency in theoretical analysis and numerical simulation.Xu Ping a...
We may use equation (17.67) to re-express the actual compression power in terms of isentropic specific work and isentropic efficiency: (17.69)P=−Wwsηs We may compare this expression with the expression for the power demanded by the pump, PD, found by combining equations (17.18) and (17....
For this step (2 to 3 on Figure...- values and they can be calculated considering the isentropic efficiency of the steam turbine used.) Lines of constant dryness fraction (x), sometimes called...- flow M*** injection flow Isentropic process Isothermal flow Gas dynamics Compressible flow Chok...
The heat loss from heat exchangers and expander losses contribute to the low efficiency of pumpless ORC. The experimental study and the performance of solar ORC for reverse osmosis desalination were studied by [155]. The expander had overall of 65% isentropic efficiency in the range of 1000–...
Fig. 9. Effect of varying compressor efficiency on heat pump COP and specific enthalpy at condenser inlet for three systems.(Source: Self SJ, Reddy BV, Rosen MA. Ground-source heat pumps as clean energy systems: fundamentals, applications and parametric performance analyses. In Harris AM (Ed....
piston compressorvolumetric efficiencyisentropic efficiencyTranslated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 12, pp. 25–26, December, 2017.A relationship that establishes a correlation between the isentropic efficiency and volumetric efficiency of a piston compressor and that takes into ...
The real compressor behavior has been incorporated by the isentropic efficiency as a function of the pressure ratio. Then slightly lower optimal high pressures and lower COP are obtained. The correlations for the optimal high pressure are given for the ideal and real heat pump. The low ...
The real compressorbehavior has been incorporated by the isentropic efficiency as a function of the pressure ratio. Then slightlylower optimal high pressures and lower COP are obtained. The correlations for the optimal high pressure aregiven for the ideal and real heat pump. The low temperature ...
It has been found that a ratio of 4:1 or more provides a notable improvement in efficiency over a piston of conventional proportions. For example, the effective piston diameter may be around 500 mm and the effective stroke length between 30 and 70 mm. The compression piston means may ...
Advantageously, the use of a reciprocating piston compressor/expander can offer significantly improved efficiency over conventional aerodynamic rotary compressors/expanders. At least one of the first and second heat storage means may comprise a chamber for receiving gas, and particulate material (e.g. ...