Thermodynamics - Power Cycles

A thermal power plant is running with no reheat or regeneration. The specific enthalpy and specific entropy of steam at the turbine inlet are 3344 kJ kg⁻¹ and 6.5 kJ kg⁻¹ K⁻¹, respectively. The turbine isentropic efficie...

In which of the following pairs of cycles, both cycles have at least one isothermal process?

A steam power cycle with regeneration as shown below on the T-s diagram employs a single open feedwater heater for efficiency improvement. The fluids mix with each other in an open feedwater heater. The turbine is isentr...