A  Carnot cycle has been chosen as a candidate for the ideal vapor power cycle.  The pump inlet is a saturated liquid and the minimum and maximum pressures are set.  The minimum pressure is 10 kPa and the maximum pressure is 10 MP

Consider the operation of an actual turbine in a gas turbine engine.  The mass flow rate is 50 lbm/s.  The turbine inlet temperature is 2040 deg F.  The pressure ratio in the compressor is 18.15.  The turbine efficiency is 0.91.   Assume variable specific heats. The turbine exit temperature is approximately Group of answer choices 1320 deg R 1220 deg R 1200 deg R 1090 deg R

Consider the operation of the ideal Brayton cycle with a regenerator. The maximum temperature in the cycle is set.  What happens with increasing pressure ratio? Group of answer choices The amount of heat added in the cycle up to a point will decrease with net work output remaining the same and thermal efficiency will increase. Thermal efficiency will increase Compressor exit temperature will increase with turbine exit temperature remaining the same. When the two temperatures are equal, the benefit of the regenerator will be zero. Thermal efficiency will decrease

True or False 1) In a Rankine Cycle, real work produced by the turbine is less that the isentropic work. 2) A valve (throttling) and ideal pump both operate isenthalpically 3)For a given TC and TH, the vapor compression cycle has a higher COP than the Carnot cycle. Group of answer choices

A steady-flow system operating on the ideal Ericsson cycle can achieve the Carnot efficiency. One of the salient features of this cycle is the isothermal expansion through a heated turbine, as shown in Fig. a. Heat is added to the turbine such that the outlet temperature is equal to the inlet temperature, i.e. T₁=T₂, and the overall pressure ratio for this process is rₚ=P₁/P₂. However, an isothermal expansion through a heated turbine is very difficult to achieve in practical engineering applications. An alternate approach is two use a multi-stage expansion process with reheating. In this approach, the gas expansion process is carried out in multiple stages with reheating in between each stage. Consider the two-stage turbine expansion with reheating shown in Fig. b. The gas enters the first stage of the turbine at state A1, is expanded isentropically to an intermediate pressure Pₐ₂, is reheated at constant pressure to state B1, and is expanded in the second stage isentropically to the…

None