Thermodynamic characteristics of flexible combined microgas turbine plants for distributed energy

by

A.V. Dologlonyan, V.T. Matviienko, A.G. Klimenko

Institute of Natural and Technical Systems,

RF, Sevastopol, Lenin St., 28

DOI: 10.33075/2220-5861-2024-3-99-114

UDC 621.438                                                             

EDN: https://elibrary.ru/wnelzd

Abstract:

The article is focused on methods for increasing the complexity of microgas turbine plant (MGTP) cycles in order to further increase their flexibility and efficiency. The direction of deeper utilization of exhaust gas heat from a basic microgas turbine engine (MGTE) is chosen, turning it into work in an organic Rankine cycle (ORC) installation. It is established that the efficiency of a combined MSTP with an ORC installation depends on the configuration of the base MSTP, ORC and the type of refrigerant and is higher compared to the basic configuration of the MSTP. For a combined MSTP based on a simple cycle (SC), the efficiency increased by 1.43…1.59; for more efficient basic configurations of the MSTP, the efficiency increased by 1.08…1.24 times. It is noted that the MSTP based on the MGTE SC with regeneration and ORC installation with R-123 refrigerant is the most universal and efficient, while the MSTP based on the SC and ORC installation can provide the greatest increase in electrical power. It is shown that to increase the flexibility of combined MSTPs, it is possible to use operating modes with both a split heat flow and a switching heat flow, supplemented by thermal accumulators and renewable energy sources.

Keywords: microgas turbine plant, heat recovery, overexpansion turbine, turbocharger utilizer, organic Rankine cycle, flexibility, cogeneration.

Full text in PDF(RUS)

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