Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3801-3820 of 9564
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Dynamic Modeling of Organic Rankine Cycle Power Systems
(The American Society of Mechanical Engineers (ASME), 2013)New promising applications of organic Rankine cycle (ORC) technology, e.g., concentrated solar power, automotive heat recovery and offgrid distributed electricity generation, demand for more dynamic operation of ORC systems. ... -
Design, Simulation, and Construction of a Test Rig for Organic Vapors
(The American Society of Mechanical Engineers (ASME), 2013)A blowdown wind tunnel for realgas applications has been designed, validated by means of dynamic simulation, and then built. The facility is aimed at characterizing an organic vapor stream, representative of the expansion ... -
Influence of Molecular Complexity on Nozzle Design for an Organic Vapor Wind Tunnel
(The American Society of Mechanical Engineers (ASME), 2013)A novel blowdown wind tunnel is currently being commissioned at the Politecnico di Milano, Italy, to investigate realgas behavior of organic fluids operating at subsonicsupersonic speed in the proximity of the liquidvapor ... -
Siloxanes as Working Fluids for Mini ORC Systems Based on High Speed Turbogenerator Technology
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents a study aimed at evaluating the use of siloxanes as the working fluid of a smallcapacity (≈10kWe) ORC turbogenerator based on the “highspeed technology†concept, combining the turbine, the pump, ... -
Evaluation of the Energy Performance of an Organic Rankine Cycle Based Micro Combined Heat and Power System Involving a Hermetic Scroll Expander
(The American Society of Mechanical Engineers (ASME), 2013)This paper evaluates the performance of an organic Rankine cycle (ORC) based microcombined heat and power (CHP) unit using a scroll expander. The considered system consists of a fuel boiler coupled with an ORC engine. As ... -
Geometric Design of Scroll Expanders Optimized for Small Organic Rankine Cycles
(The American Society of Mechanical Engineers (ASME), 2013)The application of organic Rankine cycles (ORCs) for small scale power generation is inhibited by a lack of suitable expansion devices. Thermodynamic and mechanistic considerations suggest that scroll machines are advantageous ... -
Influence of Condenser Conditions on Organic Rankine Cycle Load Characteristics
(The American Society of Mechanical Engineers (ASME), 2013)A 7 MWth combined heat and power plant (CHP) based on an organic Rankine cycle (ORC) with 5.3 MWth and 1 MWel nominal output is analyzed. A district heating system serves as heat sink; the entire system is heatled. Two ... -
Effect of Void Fraction on Pressure Drop in Upward Vertical Two Phase Gas Liquid Pipe Flow
(The American Society of Mechanical Engineers (ASME), 2013)Experimental data for the void fraction and twophase frictional pressure drop from various sources has been compiled and analyzed. The experimental data revealed that at the lower range of superficial gas velocity and void ... -
Editorial
(The American Society of Mechanical Engineers (ASME), 2013)Accordingly, all papers published in this special issue went through the rigorous journal review process. Guest associate editors Professor Colonna and Dr. Brasz and the journal associate editor, Professor Chiesa handled ... -
Foreword
(The American Society of Mechanical Engineers (ASME), 2013)Research and development activities related to Organic Rankine Cycle (ORC) power systems gained impressive momentum starting from the turn of the millennium, together with the sudden surge of industrial applications. ORC ... -
Discussion: “The Role of Chemistry in Gas Turbine Emissions” (Starkman, E. S., Mizutani, Y., Sawyer, R. F., and Teixeira, D. P., 1971, ASME J. Eng. Power, 93, pp. 333–344)
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The Effect of the Degree of Reaction on the Leakage Loss in Steam Turbines
(The American Society of Mechanical Engineers (ASME), 2013)The degree of reaction selected in designing steam turbines is of paramount importance. There has been competition between 50% reaction and impulse turbines over a century. It is, therefore, important to understand the ... -
Effect of Engine Operating Conditions and Coolant Temperature on the Physical and Chemical Properties of Deposits From an Automotive Exhaust Gas Recirculation Cooler
(The American Society of Mechanical Engineers (ASME), 2013)The effect of engine operating conditions on exhaust gas recirculation (EGR) cooler fouling was studied using a 6.4 L V8 common rail turbodiesel engine. An experimental setup, which included a custommade shell and tube ... -
Performance Analysis of OTEC Plants With Multilevel Organic Rankine Cycle and Solar Hybridization
(The American Society of Mechanical Engineers (ASME), 2013)Among the renewable energy sources, ocean energy is encountering an increasing interest. Several technologies can be applied in order to convert the ocean energy into electric power: among these, ocean thermal energy ... -
Discussion: “Some Experimental Results of Two-Dimensional Compressor Cascades at Supersonic Inlet Velocities” (Starken, H., and Lichtfuss, H. J., 1970, ASME J. Eng. Power, 92, pp. 267–274)
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Numerical Investigation of the Flow in a Hydrodynamic Thrust Bearing With Floating Disk
(The American Society of Mechanical Engineers (ASME), 2013)In this paper we present a novel method for the numerical simulation of flow in a hydrodynamic thrust bearing with floating disk. Floating disks are commonly employed in turbochargers and are situated between the thrust ... -
Experimental Study of the Instationary Flow Between Two Ducted Counter Rotating Rotors
(The American Society of Mechanical Engineers (ASME), 2013)The purpose of this work is to study experimentally the aerodynamic characteristics of a subsonic counterrotating axialflow fans system operating in a ducted configuration. The fans of diameter D=375 mm were designed to ... -
Demonstration of Model Based, Off Line Performance Analysis on a Gas Turbine Air Compressor
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents a modelbased, offline method for analyzing the performance of individual components in an operating gas turbine. This integrated model combines submodels of the combustor efficiency, the combustor ... -
Fatigue and Crack Growth in 7050 T7451 Aluminum Alloy Under Constant and Variable Amplitude Loading
(The American Society of Mechanical Engineers (ASME), 2013)The 7050 aluminum alloy is used in many aerospace structural applications. Previous studies have identified that fatigue cracks develop very rough cracksurface profiles, which cause very high crackclosure levels due to a ... -
A Thermohydrodynamic Sparse Mesh Model of Bump Type Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2013)A numerical model for 3D thermohydrodynamic analysis of bumptype foil bearings with a sparse mesh across the air film is described. The model accounts for heat convection into cooling air, thermal expansion of the bearing ...