Power-plant cycle regenerative

Polytropic process, 68-69 Potential energy, 14-17, 22-24, 31-33, 212-213 Power-plant cycles, 247-271 Rankine, 250-253 regenerative, 255-256 thermodynamic analysis of, 556-561 Poynting factor, 329 Pressure, 9-11 critical, 55-56, 571-572 partial, 300... 

Simple Cycle Regenerative Steam Turbine Combined Cycle Advanced Gas Hybrid Power Plant... 

A steam power plant operating on a regenerative cycle, as illustrated in Fig. 8.5, include feedwater heaters. Steam enters the turbine at 6,000 kPa and 500°C and exhausts at 10 kPa. St for the feedwater heaters is extracted from the turbine at pressures such that the feedwater is he to 180°C in two equal increments of temperature rise, with 5-°C approaches to the steam-condensa temperature in each feedwater heater. If the turbine and pump efficiencies are both 80 percent, is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extra for each feedwater heater ... 

Example 4.17 Ideal reheat regenerative cycle A steam power plant is using an ideal reheat regenerative Rankine cycle (see Figure 4.23). Steam enters the high-pressure turbine at 9000 kPa and 773.15 K and leaves at 850 kPa. The condenser operates at 10 kPa. Part of the steam is extracted from the turbine at 850 kPa to heat the water in an open heater, where the steam and liquid water from the condenser mix and direct contact heat transfer takes place. The rest of the steam is reheated to 723.15 K, and expanded in the low-pressure turbine section to the condenser pressure. The water is a saturated liquid after passing through the water heater and is at the heater pressure. The work output of the turbine is 75 MW. Determine the work loss at each unit. 

Now, power generation plant named GT-MHR which consists of 600MWth HTGR connected with Power Conversion Module (closed cycle regenerative gas turbine system contained within a single vessel) is under development by the US. and Russian cooperation. 

A steam power plant is using an actual regenerative Rankine cycle shown below. 

A steam power plant operates on a regenerative cycle. Steam enters the turbine at 700 psia and 800 °F and expands to 1 psia in the condenser. Part of the steam is extracted at 60 psia. The efficiencies of the turbine and pump are 0.80 and 0.95, respectively. The work output of the turbine is 4000 Btu/s. 

Figure 5.5a depicts a combined plant in which a closed Brayton helium nuclear plant releases heat to a recovery steam generator, which supplies heat to a Rankine steam plant. The generator is provided with a gas burner for supplementary additional heat when the demand of steam power is high. The Rankine plant is a regenerative cycle. 

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