THERMODYNAMIC CHARACTERISTICS OF COMBINED CYCLES OF VACUUM MICRO-GAS TURBINE PLANTS OF HEAT AND POWER SUPPLY OF LOCAL OBJECTS

2020 ◽  
Vol 5 ◽  
pp. 21-27
Author(s):  
A.V. DOLOGLONYAN ◽  
D.S. STREBKOV ◽  
V.T. MATVIIENKO ◽  
I.N. STACENKO
Keyword(s):  
Gas Turbine ◽  
Organic Rankine Cycle ◽  
Thermodynamic Characteristics ◽  
Rankine Cycle ◽  
Simple Cycle ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Micro Gas Turbine ◽  
Heat Regeneration ◽  
Combined Cycles

The subject of this article is the use of organic Rankine cycle (ORC) plants to improve the efficiency of vacuum cycles of micro-gas turbine engines (VMGTE). Combined installations VMGTE with ORC of a simple cycle and with heat regeneration have been investigated. The optimal parameters of the plants in the mode of the switching heat flow are found for various working fluids of the ORC. It has been established that the combination of VMGTE with ORC allows to increase the efficiency of plants by 4.2 ... 12.5%, while maintaining cogeneration capabilities. Due to the design features, the combined plant based on a simple cycle can be used for the utilization of secondary energy resources of any potential.

Thermodynamic Characteristics of Hybrid Solar Microgas Turbine Plants under Tropical Climate

2021 ◽  
Vol 2 (43) ◽  
pp. 20-35
Author(s):  
Andrey V. Dologlonyan ◽  
◽  
Dmitriy S. Strebkov ◽  
Valeriy T. Matveenko ◽  
◽  
...  
Keyword(s):  
Gas Turbine ◽  
Solar Collector ◽  
Heat Recovery ◽  
Tropical Climate ◽  
Simple Cycle ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Turbine Plant ◽  
Micro Gas Turbine ◽  
Gas Turbine Plant

The article presents the results obtained during the study of the characteristics of hybrid solar micro-gas turbine units with an integrated parabolocylindrical solar collector. The efficiency of a hybrid solar gas turbine plant depends both on the efficiency of the solar collector and the location of its integration, and on the efficiency of the gas turbine engine. (Research purpose) The research purpose is in studying hybrid solar gas turbine installations based on a parabolocylindrical focusing solar collector in combination with micro-gas turbine engines of various configurations to determine the most suitable match. (Materials and methods) The article considers four basic schemes of gas turbine engines running on organic fuel, their parameters and optimization results. The article presents the main climatic parameters for the study of the focusing solar collector, as well as the parameters of the collector itself and the main dependencies that determine its efficiency and losses. The place of integration of the focusing solar collector into the gas turbine plant was described and justified. (Results and discussion) Hybrid solar micro-gas turbine installations based on micro-gas turbine engines of a simple cycle, a simple cycle with heat recovery, a simple cycle with a turbocharger utilizer, a simple cycle with a turbocharger utilizer and heat recovery for tropical climate conditions were studied on the example of Abu Dhabi. (Conclusions) The most suitable configuration of micro-gas turbine engines for integrating a focusing solar collector is a combination of a simple cycle with a turbocharger utilizer and regeneration. The combination of micro-gas turbine engines of a simple cycle with a turbocharger heat recovery and heat recovery with an integrated focusing solar collector can relatively increase the average annual efficiency of fuel consumption of such installations in a tropical climate by 10-35 percent or more, while maintaining cogeneration capabilities.

Identification of Optimal Architecture for Efficient Simple-Cycle Gas Turbine Engines

2009 ◽  
Author(s):  
Sankaran Ramakrishnan ◽  
Kwee-Yan Teh ◽  
Christopher F. Edwards
Keyword(s):  
Gas Turbine ◽  
Simple Cycle ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Factors Affecting ◽  
Compression And Expansion ◽  
Combined Cycles ◽  
In The Beginning ◽  
Exergy Analyses ◽  
Engine Cycle

Increasing efficiency of gas turbine engines by way of irreversibility minimization has been the underlying objective in the development of a variety of simple, regenerative, and combined cycles. The approach thus far has been to conceptualize new cycles, or choose existing cycles, perform exergy analyses, and make modifications to minimize irreversibility. In this paper we take a fundamentally different approach by developing a thermodynamic framework that defines the principles governing the minimization of irreversibility and uses these principles to deduce an optimal architecture for simple-cycle gas turbine engines. No engine cycle/design is assumed in the beginning. The benefit of this approach is two-fold. First, it explains the factors affecting irreversibility in gas turbine engines. Second, it defines an optimal architecture for simple-cycle engines based on the chosen constraints (e.g., polytropic efficiency of compression and expansion processes, blade temperature limits, etc.) having an efficiency greater than any preconceived cycle/architecture with the same constraints.

THERMODYNAMIC CHARACTERISTICS OF MICROGAS TURBINE ENGINES COMBINED CYCLES FOR DISTRIBUTED ENERGY

2020 ◽  
Vol 4 (1) ◽  
pp. 28-41
Author(s):  
A.V. DOLOGLONYAN ◽  
V.T. MATVEENKO
Keyword(s):  
Renewable Energy Sources ◽  
Organic Rankine Cycle ◽  
Thermodynamic Characteristics ◽  
Rankine Cycle ◽  
Turbine Engines ◽  
Energy Sources ◽  
Distributed Energy ◽  
Combined Cycles ◽  
The Subject ◽  
Basic Configuration

The subject of this article is methods of complicating the cycles of microgas turbine plants (MGTP) in order to further increase their efficiency. The direction of a deeper utilization of the heat of exhaust gases from MGTP was chosen, turning it into work in the organic Rankine cycle (OCR) plant. It has been established that the costeffectiveness of MGTP with OCR is dependent on the configuration of MGTP, OCR and the type of refrigerant and is higher than the basic configuration of MGTP by 4... 15%. It is shown that to increase the versatility of combined MGTP, it is possible to use plants with a switching heat flow, supplemented by renewable energy sources, to conduct separate optimization of the basic MGTP and the OCR plant.

USE OF LOCAL COLD CLIMATE RESOURCES IN COMBINED CYCLES OF MICROGAS TURBINE ENGINES FOR DISTRIBUTED POWER ENGINEERING

2020 ◽  
Vol 4 (2) ◽  
pp. 124-135
Author(s):  
A.V. DOLOGLONYAN ◽  
V.T. MATVIIENKO
Keyword(s):  
Steam Turbine ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Decomposition Temperature ◽  
Cold Climate ◽  
Turbine Engines ◽  
Temperature Potential ◽  
Combined Cycles ◽  
The Subject ◽  
R 134A

The subject of this article is methods of complicating of microgas turbine plants (MGTP) cycles in order to further increase their efficiency. The direction of a deeper utilization of the heat of exhaust gases of MGTP was chosen, turning it into work in the organic Rankine cycle (OCR) plant, as well as the use of local climatic cold resources. It has been established that the use of an additional steam turbine as part of the OCR combined MGTP allows to increase its efficiency from October to March on 2... 4% depending on the configuration of the basic MGTP, which ensures an increase in the average annual efficiency on 1... 2%. It is shown that the OCR plant on R-134a does not allow the full use of the temperature potential of the gases of the base MGTP, since the decomposition temperature is lower than the temperature of the gases of the base MGTP, therefore the efficiency of all configurations of combined MGTP using R- 134a is lower than the analogous ones using ammonia on 2... 5%.

Design Study of an Advanced Concept Simple Gas Turbine for Possible Use in Low Emission Automobiles

1972 ◽  
Author(s):  
H. C. Eatock ◽  
M. D. Stoten
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Pressure Ratio ◽  
Simple Cycle ◽  
Turbine Engines ◽  
Nox Emissions ◽  
Preliminary Design ◽  
Gas Turbine Engines ◽  
High Pressure Ratio

United Aircraft Corporation studied the potential costs of various possible gas turbine engines which might be used to reduce automobile exhaust emissions. As part of that study, United Aircraft of Canada undertook the preliminary design and performance analysis of high-pressure-ratio nonregenerated (simple cycle) gas turbine engines. For the first time, high levels of single-stage component efficiency are available extending from a pressure ratio less than 4 up to 10 or 12 to 1. As a result, the study showed that the simple-cycle engine may provide satisfactory running costs with significantly lower manufacturing costs and NOx emissions than a regenerated engine. In this paper some features of the preliminary design of both single-shaft and a free power turbine version of this engine are examined. The major component technology assumptions, in particular the high pressure ratio centrifugal compressor, employed for performance extrapolation are explained and compared with current technology. The potential low NOx emissions of the simple-cycle gas turbine compared to regenerative or recuperative gas turbines is discussed. Finally, some of the problems which might be encountered in using this totally different power plant for the conventional automobile are identified.

Research on the Combined Cycle of a Biogas Micro Gas Turbine and an Organic Rankine Cycle

2019 ◽  
Vol 13 (5) ◽  
pp. 683-689
Author(s):  
Zheng Jian ◽  
Feng Zheng-Jiang ◽  
Wang Jian ◽  
Wang Yan ◽  
Li Xin-Yi ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Micro Gas Turbine

scholarly journals Study on the Influence of Air Bleeds on the Behaviour and on the Performance of Gas Turbine Engines

1991 ◽  
Author(s):  
Giovanni Torella
Keyword(s):  
Gas Turbine ◽  
Fault Simulation ◽  
Engine Performance ◽  
Thermodynamic Characteristics ◽  
Computer Programs ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Design Codes ◽  
Design Point ◽  
Air System

The influence of air system an engine performance and behaviour is considered. A method based on the polytropic efficiency concept has been developed in order to calculate the thermodynamic characteristics of air bleed. This method has been included in the “Design Point” and “Off Design” codes of different configuration engines. The paper shows the wide applications of the programs for several calculations. Moreover the results of the faults of air system are shown by both diagnostic and fault simulation computer programs.

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