For a turbine or compressor, the change of entropy is indicated by the ‘isentropic efficiency’. The ideal is 100%, meaning no change in entropy, but a typical value is 0.8–0.9. We have already seen that the change in specific enthalpy of a perfect gas is δh=cp.δT and that, fro...
Purpose Usage of gas turbine engines has increased by day due to rising demand for military and civil applications. This case results in investigating diverse topics related to energy efficiency and irreversibility of these systems. The purpose of this paper is to perform a detailed entropy ...
According to Guzzella and Onder [47], in automotive applications, typical values for the maximum turbine efficiency are ηt,max≈0.65−0.75. Note that the system mass flow rate is equal to the actual turbine mass flow rate and is calculated with Eq. (6.30) where P7 is in pounds per ...
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...- static pressure, temperature and density decrease. Since the process is isentropic, the ...
It also sets the reference for the definition of efficiency of compressors and turbines For compressors and pumps, work is done on the system: For turbines, work is done by the system: The T-s Diagram Turbine Compressor For ideal gases, the h-s and T-s diagrams are very similar. Differe...
awhere W is the mass flow, T is the temperature and P is the pressure. The subscripts 1 and 2 refer to the turbine inlet and outlet, respectively. What remains possibly to consider are steam turbine losses and variations with load of the isentropic efficiency. 那里W是流量, T是温度,并且P...
Define isentropic. isentropic synonyms, isentropic pronunciation, isentropic translation, English dictionary definition of isentropic. adj. Without change in entropy; at constant entropy. is′en·tro′pi·cal·ly adv. American Heritage® Dictionary of
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. ...
3) isentropic enthalpydrop of turbine 涡轮等熵焓降 4) Equivalent Enthalpy Drop 等效热降 1. Diagnosis on the economy of regenerative heater based onEquivalent Enthalpy DropTheory; 用等效热降法诊断回热加热器的经济性 2. The heat efficiency of different mode of drainage recycling is calculated and ...
The influence of the seal water temperature of water ring vacuum bumps on the condenser pressure is analyzed quantitatively,and the relationship between the condenser pressure and the unit efficiency was identified with equivalent enthalpy drop method. 定量分析电厂水环式真空泵密封水温度对凝汽器压力的...