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Power System Optimization
Published in John Fuller, Pamela Obiomon, Samir I. Abood, Power System Operation, Utilization, and Control, 2023
John Fuller, Pamela Obiomon, Samir I. Abood
Figure 5.10 shows a combined cycle power plant. A heat recovery steam generator (HRSG) takes exhaust heat from the gas turbine that would otherwise be released through the exhaust stack. The HRSG creates steam from the gas turbine exhaust heat and delivers it to the steam turbine. The steam turbine sends its energy to the generator drive shaft, converted into additional electricity.
Heat Transfer Equipment Design and Performance
Published in V. Canapathx, Steam Plant Calculations Manual, 2017
The HRSG system efficiency in gas turbine plants will improve with the addition of auxiliary fuel, which increases the gas temperature to the HRSG and hence increases its steam generation. There are two reasons for this.
Thermodynamics and Power Cycles
Published in Kenneth D. Kok, Nuclear Engineering Handbook, 2016
The high temperature of the exhaust gases in Brayton cycle plants and the low cost of natural gas has led to popularity of combined cycle plants like the one shown in Figure 23.23. An HRSG extracts heat from the exhaust and uses it to generate steam, which is in turn used in a Rankine cycle bottoming cycle.
Recent developments, challenges and opportunities for harnessing solar renewable energy for thermal Enhanced Oil Recovery (EOR)
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Ramesh V. K., V. Chintala, Suresh Kumar
In cogeneration, natural gas is burned in a Gas Turbine and power is produced. In addition, with the help of a HRSG steam is generated using hot exhaust from the gas turbine. Combined heat and power generation (Cogen) facilities are very efficient at converting gas into useful work, however inland oilfield Cogen facilities suffer efficiency loss compared to coastal power generation that can use wet cooling towers and use waste heat for industrial heat loads, desalination plants, or a steam turbine to create more electricity. Cogen can be efficient use of natural gas; but the plants are capital intensive and only make sense if there is additional electricity demand (Ersayin and Ozgener 2015).
Nuclear Air-Brayton Power Cycles with Thermodynamic Topping Cycles, Assured Peaking Capacity, and Heat Storage for Variable Electricity and Heat
Published in Nuclear Technology, 2021
Charles W. Forsberg, Patrick J. McDaniel, Bahman Zohuri
The reactor would operate at base load. Within a NACC, air is filtered, compressed, heated in heat exchanger 1 (HX1), goes through turbine 1, is reheated in heat exchanger 2 (HX2), goes through turbine 2, is reheated in heat exchanger 3 (HX3), goes through turbine 3, and exits to the steam cycle. The system can have two or three reheat cycles. The warm air from the Brayton cycle goes through the HRSG and up the stack. Steam produced in the HRSG can be used to produce added electricity or sent to industry. In base-load operation, this system is similar to a GTCC system where air temperatures exiting the Brayton cycle are typically near 838 K (565°C), as would be if coupled to a salt-cooled reactor