scholarly journals A Small Scale Biomass Fueled Gas Turbine Engine

1998 ◽  
Author(s):  
Joe D. Craig ◽  
Carol R. Purvis
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Small Scale ◽  
Brayton Cycle ◽  
Prime Mover ◽  
Turbine Engine ◽  
Rice Hulls ◽  
Turbine Component ◽  
The Cost ◽  
New Generation

A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant growth materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.

A Small Scale Biomass Fueled Gas Turbine Engine

1999 ◽  
Vol 121 (1) ◽  
pp. 64-67 ◽  
Author(s):  
J. D. Craig ◽  
C. R. Purvis
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Small Scale ◽  
Brayton Cycle ◽  
Prime Mover ◽  
Turbine Engine ◽  
Rice Hulls ◽  
Turbine Component ◽  
The Cost ◽  
New Generation

A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant growth materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.

Gas Turbine Engine Health Management: Past, Present and Future Trends

2013 ◽  
Author(s):  
Allan J. Volponi
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Electronic Monitoring ◽  
Health Management ◽  
Spare Parts ◽  
Future Trends ◽  
Diagnostic Systems ◽  
Turbine Engine ◽  
Aero Engines ◽  
The Cost

Engine diagnostic practices are as old as the gas turbine itself. Monitoring and analysis methods have progressed in sophistication over the past 6 decades as the gas turbine evolved in form and complexity. While much of what will be presented here may equally apply to both stationary power plants and aero-engines, the emphasis will be on aero propulsion. Beginning with primarily empirical methods centering around monitoring the mechanical integrity of the machine, the evolution of engine diagnostics has benefited from advances in sensing, electronic monitoring devices, increased fidelity in engine modeling and analytical methods. The primary motivation in this development is, not surprisingly, cost. The ever increasing cost of fuel, engine prices, spare parts, maintenance and overhaul, all contribute to the cost of an engine over its entire life cycle. Diagnostics can be viewed as a means to mitigate risk in decisions that impact operational integrity. This can have a profound impact on safety, such as In-Flight Shut Downs (IFSD) for aero applications, (outages for land based applications) and economic impact caused by Unscheduled Engine Removals (UERs), part life, maintenance and overhaul and the overall logistics of maintaining an aircraft fleet or power generation plants. This paper will review some of the methods used in the preceding decades to address these issues, their evolution to current practices and some future trends. While several different monitoring and diagnostic systems will be addressed, the emphasis in this paper will be centered on those dealing with the aero-thermodynamic performance of the engine.

Gas Turbine Engine Health Management: Past, Present, and Future Trends

2014 ◽  
Vol 136 (5) ◽  
Author(s):  
Allan J. Volponi
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Electronic Monitoring ◽  
Health Management ◽  
Spare Parts ◽  
Future Trends ◽  
Diagnostic Systems ◽  
Turbine Engine ◽  
Diagnostic Practices ◽  
The Cost

Engine diagnostic practices are as old as the gas turbine itself. Monitoring and analysis methods have progressed in sophistication over the past six decades as the gas turbine evolved in form and complexity. While much of what will be presented here may equally apply to both stationary power plants and aeroengines, the emphasis will be on aeropropulsion. Beginning with primarily empirical methods centered on monitoring the mechanical integrity of the machine, the evolution of engine diagnostics has benefited from advances in sensing, electronic monitoring devices, increased fidelity in engine modeling, and analytical methods. The primary motivation in this development is, not surprisingly, cost. The ever increasing cost of fuel, engine prices, spare parts, maintenance, and overhaul all contribute to the cost of an engine over its entire life cycle. Diagnostics can be viewed as a means to mitigate risk in decisions that impact operational integrity. This can have a profound impact on safety, such as in-flight shutdowns (IFSD) for aero applications, (outages for land-based applications) and economic impact caused by unscheduled engine removals (UERs), part life, maintenance and overhaul, and the overall logistics of maintaining an aircraft fleet or power generation plants. This paper will review some of the methods used in the preceding decades to address these issues, their evolution to current practices, and some future trends. While several different monitoring and diagnostic systems will be addressed, the emphasis in this paper will be centered on those dealing with the aerothermodynamic performance of the engine.

Direct Off-Design Performance Prediction of Micro Gas Turbine Engine for Distributed Power Generation

2017 ◽  
Author(s):  
Valentyn Barannik ◽  
Maksym Burlaka ◽  
Leonid Moroz ◽  
Abdul Nassar
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Power Plants ◽  
Gas Turbine Engine ◽  
Small Scale ◽  
Turbine Engine ◽  
Design Performance ◽  
Exhaust Heat ◽  
Electrical Generation ◽  
Central Station

Central-station power plants (CSPP) are the main provider of energy today. In the process of power generation at central-power stations, about 67% of primary energy is wasted. Distributed cogeneration or combined heat and power (CHP) systems are an alternative to central-station power plants. In these systems, an electrical generation system located in a residence or at a commercial site consumes natural gas to generate electricity locally and then the exhaust heat is utilized for local heating needs (in contrast to being wasted at central-stations). Microturbines offer a number of potential advantages compared to other technologies for small-scale power generation. For example, compact size and low-weight leading to reduced civil engineering costs, a small number of moving parts, lower noise and vibration, multi-fuel capabilities, low maintenance cost as well as opportunities for lower emissions. Inverter generators allow using micro-turbines of different shaft rotation speed that opens opportunities to unit optimization at off-design modes. The common approach to predict the off-design performance of gas turbine unit is the mapping of the compressor and the turbine separately and the consequent matching of common operation points. However, the above-mentioned approach might be rather inaccurate if the unit has some secondary flows. In this article an alternative approach for predicting off-design performance without using component maps is presented. Here the off-design performance is done by direct calculation of the components performances. On each off-design mode, the recalculation of the characteristic of all scheme components, including a compressor, gas turbine, combustor, recuperator and secondary flow system is performed. The different approaches for obtaining the performance at off-design modes considering the peculiarities of the gas turbine engine are presented in this paper.

Gas Turbine Engine Exhaust Waste Heat Recovery Using Supercritical CO2 Brayton Cycle With Thermoelectric Generator Technology

2015 ◽  
Author(s):  
Francis A. Di Bella
Keyword(s):  
Gas Turbine ◽  
Supercritical Co2 ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Brayton Cycle ◽  
Prime Mover ◽  
Engine Exhaust ◽  
Turbine Engine ◽  
Exhaust Waste Heat

This presentation will discuss the results of the feasibility analysis of a Brayton cycle-based, supercritical CO2 system that recovers waste heat from an MT30 gas turbine used in marine applications. The analysis also included the use of thermoelectric generator (TEG) devices that are one of several direct energy conversion methods known to be applicable to waste heat recovery. The analysis was conducted by Concepts NREC, in collaboration with the Maine Maritime Academy and their principal consultant, Thermoelectric Power Systems, LLC. The feasibility analysis was conducted under Navy SBIR Proposal Number N103-229-0533, entitled “Gas Turbine Engine Exhaust Waste Heat Recovery Shipboard Module Development”. The objective of the project was to improve the energy efficiency of the MT30 prime-mover power system for the Navy and other commercial vessels. The performance goal for the energy recovery system was to improve the fuel economy of the prime mover by 20% when significantly part-loaded.

Probabilistic Assessment of Thermodynamic Output of an Intercooled-Reheated-Regenerative Brayton Cycle Coupled to Variable Temperature Heat Reservoirs

2013 ◽  
Author(s):  
Vishal Anand ◽  
Krishna Nelanti
Keyword(s):  
Gas Turbine ◽  
Thermal Efficiency ◽  
Power Plants ◽  
Variable Temperature ◽  
Gas Turbine Engine ◽  
Design Parameters ◽  
Probabilistic Assessment ◽  
Brayton Cycle ◽  
Turbine Engine ◽  
Temperature Heat

The gas turbine engine works on the principle of Brayton cycle. One of the ways to improve the thermal efficiency of gas turbine engine is to make changes in the Brayton cycle. These changes may include intercooling, reheating, regeneration etc. The aim of the present study is to do a probabilistic assessment of the thermal efficiency and the dimensionless power of an intercooled, reheated, regenerative Brayton cycle coupled to variable temperature heat reservoirs. The Spearman’s rank coefficient has been used to find the design parameters which most affect the thermal efficiency and the dimensionless power. The design parameters, such as the effectiveness of the different heat exchangers, the efficiency of turbines and compressors and the heat capacitance rates of the external and the working fluids; have been listed with their relative impact on the thermal efficiency and the dimensionless power. The probabilistic assessment gives us a new insight into the sensitivity of the thermal efficiency and the dimensionless power of the Brayton Cycle with respect to these parameters. It will help the designers/decision makers to allocate the limited resources in a better way with the ultimate aim of making more efficient power plants.

Fuel-Saving Warship Drives

1998 ◽  
Vol 120 (08) ◽  
pp. 63-67
Author(s):  
Steven Ashley
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Operational Reliability ◽  
Turbine Engines ◽  
Medium Size ◽  
Turbine Engine ◽  
Acoustic Signature ◽  
Heat Recuperation ◽  
New Generation

This article focuses on a fuel-efficient gas turbine engine featuring intercooling and heat recuperation, which is being developed to power a new generation of warships. Modern warships are often powered by gas turbine engines so they can take advantage of the turbine’s rapid response capabilities, solid operational reliability, high power density, and compact dimensions. For medium-size surface combatants such as destroyers, aircraft-derivative gas turbines have become the dominant propulsion engine type, having largely replaced traditional steam or diesel power plants. Though the all-electric concept is far from new, having been applied previously to merchant vessels, the technology is looking better of late. The NRC panel stated that gas turbine propulsion units, modular rare-earth permanent magnetic motors, and power control module technologies have matured to the point that all-electric ships appear feasible. The technology cited “unique advantages” in reduced volume, modular flexible propulsion, lower acoustic signature, enhanced survivability, high propeller torque at low speed, and inherent reversing capability. The result would be a submarine-type propulsion design with diesel-like fuel consumption.

Paper 21: Planning for Failures

1969 ◽  
Vol 184 (2) ◽  
pp. 156-160
Author(s):  
R. H. W. Brook
Keyword(s):  
Reliability Analysis ◽  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Failure Pattern ◽  
Management Decisions ◽  
Turbine Engine ◽  
The Cost ◽  
Service Data ◽  
Component Failures ◽  
Realistic Prediction

When a serious failure situation has developed, an expensive crash programme is usually required. If in-service data are analysed as a routine, then impending trouble may be foreseen and management decisions made to minimize the cost. A reliability analysis can help to establish a failure pattern compatible with intuitive engineering assessment so that, from a realistic prediction, alternative courses of action can be considered. A recent gas-turbine engine problem which has caused six component failures is analysed, and alternative replacement strategies are considered. It is suggested that to adopt the intuitive compromise strategy could be the most expensive in this case.

Digital twin of rig for testing of centrifugal compressor for small-scale gas turbine engine

2021 ◽  
pp. 5-16
Author(s):  
Yu.М. Temis ◽  
A.V. Solovjeva ◽  
Yu.N. Zhurenkov ◽  
A.N. Startsev ◽  
M.Yu. Temis ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Centrifugal Compressor ◽  
Gas Turbine Engine ◽  
Small Scale ◽  
Turbine Engine ◽  
Digital Twin

scholarly journals Thermodynamic Analysis of Different Configurations of Combined Cycle Power Plants

2015 ◽  
Vol 5 (2) ◽  
pp. 89
Author(s):  
Munzer S. Y. Ebaid ◽  
Qusai Z. Al-hamdan
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Combined Cycle ◽  
Cycle Performance ◽  
Maximum Efficiency ◽  
Specific Work ◽  
Slight Effect ◽  
Turbine Engine ◽  
Gas Turbine Cycle ◽  
Cycle Efficiency

<p class="1Body">Several modifications have been made to the simple gas turbine cycle in order to increase its thermal efficiency but within the thermal and mechanical stress constrain, the efficiency still ranges between 38 and 42%. The concept of using combined cycle power or CPP plant would be more attractive in hot countries than the combined heat and power or CHP plant. The current work deals with the performance of different configurations of the gas turbine engine operating as a part of the combined cycle power plant. The results showed that the maximum CPP cycle efficiency would be at a point for which the gas turbine cycle would have neither its maximum efficiency nor its maximum specific work output. It has been shown that supplementary heating or gas turbine reheating would decrease the CPP cycle efficiency; hence, it could only be justified at low gas turbine inlet temperatures. Also it has been shown that although gas turbine intercooling would enhance the performance of the gas turbine cycle, it would have only a slight effect on the CPP cycle performance.</p>

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