In the ideal Rankine Cycle, pump and turbine operate isentropically, meaning their efficiency is 100% but, in the actual cycle, due to the irreversibilities, there are a few differences. The two main causes for irreversibilities are: – heat loss to the surroundings – the friction caused between the steam and the cycle components. Heat is … Read more
El agua es el fluido de trabajo en un ciclo Rankine ideal. El vapor saturado entra en la turbina a 16 MPa y la presión del condensador es de 8 kPa. El caudal másico de vapor que ingresa a la turbina es de 120 kg / s. Determinar: (a) la potencia neta desarrollada, en kW. … Read more
Uno de los problemas para aumentar la eficiencia del ciclo de Rankine ideal es el contenido de humedad del vapor en las etapas finales de la expansión. Una turbina de dos etapas, con recalentamiento en el medio, es la solución al problema de humedad excesiva en las turbinas y se usa comúnmente en plantas de … Read more
El ciclo ideal para las centrales eléctricas de vapor es el ciclo de Rankine. El ciclo de Rankine ideal simple no implica ninguna irreversibilidad interna y consta de los siguientes cuatro procesos: 1-2 Compresión isentrópica en una bomba: el agua se bombea de baja presión a alta presión, que es la presión de funcionamiento de … Read more
Water is the working fluid in an ideal Rankine cycle. The saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 120 kg/s. Determine: (a) the net power developed, in kW. (b) the rate of heat transfer to the steam … Read more
One of the problems in increasing the efficiency of the ideal Rankine cycle is the moisture content of the steam at the final stages of the expansion. A two-stage turbine with reheat in between, is the solution to the excessive moisture problem in turbines and, is commonly used in actual steam power plants. The sole … Read more
The ideal cycle for vapor power plants is the Rankine cycle. The simple ideal Rankine cycle does not involve any internal irreversibilities and consists of the following four processes: 1-2 Isentropic compression in a pump: Water is pumped from low pressure to high pressure, which is the boiler’s operating pressure. At this stage the fluid … Read more