A steam power plant operates on a reheat Rankine cycle with

A steam power plant operates on a reheat Rankine cycle with two feedwater heaters as shown in the following figure. Sketch the cycle on the T-s diagram with all points (1-12) plotted; Based on the T-s diagram, which are the reheating and regenerating processes? Based on the T-s diagram, what\'s the w_net in terms of area? (w_net =A_??)

Solution

(a)

The T-S diagram for the reheat rankine cycle with (1-12) is shown in figure.(1)

(b)

Based on the T-S diagram, the reheat and regenerative cycle is shown in above figure. (1)

The point 8-9 is the reheating cycle.(high pressure turbine to low pressure turbine via boiler)

The point 4-7 , 9-11 and 2-10 is regenerating cycle.(turbine to feedwater pump and turbine to condenser)

(c)

Based on the T-S diagram, net work done is shown in figure. (1)

Area at the point 1-2-3-4-5-6-8-9-11-12