A combined cycle (airbreathing/rocket) powered VTOVL single stage orbital transport

1986 ◽  
Author(s):  
W. ESCHER ◽  
D. DOUGHTY ◽  
J. ROBINSON ◽  
R. PUENING
Keyword(s):  
Combined Cycle ◽  
Single Stage

33: Synchronous Urethral Strictures: Prevalence and 10-Year Experience with Single Stage Reconstruction Via Systematic Retrograde Surgical Approach

2007 ◽  
Vol 177 (4S) ◽  
pp. 12-12
Author(s):  
L. Andrew Evans ◽  
Benjamin Moses ◽  
Kevin Rice ◽  
Craig Robson ◽  
Allen F. Morey
Keyword(s):  
Surgical Approach ◽  
Single Stage ◽  
Urethral Strictures

A SINGLE STAGE ECR SOURCE FOR THE RADIOACTIVE ION BEAM PROJECT IN LOUVAIN-LA-NEUVE

1989 ◽  
Vol 50 (C1) ◽  
pp. C1-813-C1-817
Author(s):  
M. ARNOULD ◽  
F. BAETEN ◽  
D. DARQUENNES ◽  
Th. DELBAR ◽  
C. DOM ◽  
...  
Keyword(s):  
Ion Beam ◽  
Single Stage ◽  
Radioactive Ion Beam ◽  
Ecr Source

Immediate Single-Stage Reconstruction of Complex Frontofaciobasal Injuries: Part II

2014 ◽  
Vol 75 (S 01) ◽  
Author(s):  
Sherif Emara ◽  
Hassan Nablsi ◽  
Tarek ELKammash ◽  
Mohamed Sief ◽  
Khaled Attia ◽  
...  
Keyword(s):  
Single Stage

Exergoeconomic analysis of renewable multi-generation system

2020 ◽  
pp. 99-111
Author(s):  
Vontas Alfenny Nahan ◽  
Audrius Bagdanavicius ◽  
Andrew McMullan
Keyword(s):  
Capital Investment ◽  
Combined Cycle ◽  
Asian Countries ◽  
Generation System ◽  
Integrated Gasification Combined Cycle ◽  
Heating And Cooling ◽  
Integrated Gasification ◽  
Exergoeconomic Analysis ◽  
Main Components ◽  
The Cost

In this study a new multi-generation system which generates power (electricity), thermal energy (heating and cooling) and ash for agricultural needs has been developed and analysed. The system consists of a Biomass Integrated Gasification Combined Cycle (BIGCC) and an absorption chiller system. The system generates about 3.4 MW electricity, 4.9 MW of heat, 88 kW of cooling and 90 kg/h of ash. The multi-generation system has been modelled using Cycle Tempo and EES. Energy, exergy and exergoeconomic analysis of this system had been conducted and exergy costs have been calculated. The exergoeconomic study shows that gasifier, combustor, and Heat Recovery Steam Generator are the main components where the total cost rates are the highest. Exergoeconomic variables such as relative cost difference (r) and exergoeconomic factor (f) have also been calculated. Exergoeconomic factor of evaporator, combustor and condenser are 1.3%, 0.7% and 0.9%, respectively, which is considered very low, indicates that the capital cost rates are much lower than the exergy destruction cost rates. It implies that the improvement of these components could be achieved by increasing the capital investment. The exergy cost of electricity produced in the gas turbine and steam turbine is 0.1050 £/kWh and 0.1627 £/kWh, respectively. The cost of ash is 0.0031 £/kg. In some Asian countries, such as Indonesia, ash could be used as fertilizer for agriculture. Heat exergy cost is 0.0619 £/kWh for gasifier and 0.3972 £/kWh for condenser in the BIGCC system. In the AC system, the exergy cost of the heat in the condenser and absorber is about 0.2956 £/kWh and 0.5636 £/kWh, respectively. The exergy cost of cooling in the AC system is 0.4706 £/kWh. This study shows that exergoeconomic analysis is powerful tool for assessing the costs of products.

Effects of stator splitter blades on aerodynamic performance of a single-stage transonic axial compressor

2020 ◽  
Vol 14 (4) ◽  
pp. 7369-7378
Author(s):  
Ky-Quang Pham ◽  
Xuan-Truong Le ◽  
Cong-Truong Dinh
Keyword(s):  
Stokes Equations ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Aerodynamic Performance ◽  
Numerical Results ◽  
Single Stage ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Operating Stability ◽  
Length Coverage

Splitter blades located between stator blades in a single-stage axial compressor were proposed and investigated in this work to find their effects on aerodynamic performance and operating stability. Aerodynamic performance of the compressor was evaluated using three-dimensional Reynolds-averaged Navier-Stokes equations using the k-e turbulence model with a scalable wall function. The numerical results for the typical performance parameters without stator splitter blades were validated in comparison with experimental data. The numerical results of a parametric study using four geometric parameters (chord length, coverage angle, height and position) of the stator splitter blades showed that the operational stability of the single-stage axial compressor enhances remarkably using the stator splitter blades. The splitters were effective in suppressing flow separation in the stator domain of the compressor at near-stall condition which affects considerably the aerodynamic performance of the compressor.

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