Advantages And Disadvantages Of Rankine Cycle

Advantages and Disadvantages:

When it came to deciding what type of Rankine cycle we were going to use in order to reach our desired efficiency of 40 percent, we initially chose a simple Rankine cycle. However, the simple Rankine cycle ended up giving us unrealistic values so we decided upon a reheat-regenerative Rankine cycle with an open water feeder. Open feedwater heaters are simple and inexpensive and have good heat transfer characteristics. They also bring the feedwater to the saturation state. For each heater, however, a pump is required to handle the feedwater.

In the Rankine steam power cycle it is observed that the condensate which is at low temperature has an irreversible mixing with hot boiler water and this result in decrease of cycle efficiency. To increase the efficiency methods are adopted to heat the feed water entering in boiler by interchanging the heat with in the system. This heating of feed water and in steps is called regenerative feed heat method and the cycle is called regenerative cycle.

The surface condenser of a regenerative Rankine cycle is used to condensate all the steam extracted from the turbine. The condensed water is allows to flow through the low pressure and high pressure heater in stages. The steam extracted from the turbine at different stages is supplied to low pressure and high pressure stages to heat the feed water. The conditions of steam bled for each heater are selected so that the temperature of saturated steam will be at a