CD
Authored
8 records found
Hybrid electric powertrain for long-haul trucks and buses
Preliminary analysis of a new concept based on a combined cycle power plant
The electric hybridization of heavy-duty road vehicles is a promising alternative to reduce the environmental impact of freight and passengers transportation. Employing a micro gas turbine as a prime mover offers several advantages: high power density, fuel flexibility, ultra-low
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This paper presents a preliminary study about a combined-cycle engine based on a turboshaft engine and an organic-Rankine-cycle (ORC) bottoming unit to be used onboard an aircraft with a turboelectric propulsion system. The aim is to analyse whether benefits with respect to missi
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This paper presents a preliminary study about a combined-cycle engine based on a turboshaft engine and an organic-Rankine-cycle (ORC) bottoming unit to be used onboard an aircraft with a turboelectric propulsion system. The aim is to analyse whether benefits with respect to missi
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Efficiency in Geothermal Operations
Mixtures as working fluids for ORC Power Plants
The use of mixtures in place of pure fluids in Organic Rankine Cycle (ORC) power plants is proposed as a possible improvement in terms of efficiency, environmental benefit and safety of the system. In particular, zeotropic mixtures exhibit a temperature variation (or glide) durin
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Toward the integrated design of organic rankine cycle power plants
A method for the simultaneous optimization of working fluid, thermodynamic cycle, and turbine
The conventional design of organic Rankine cycle (ORC) power systems starts with the selection of the working fluid and the subsequent optimization of the corresponding thermodynamic cycle. More recently, systematic methods have been proposed integrating the selection of the work
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Preliminary design of the orchid
A facility for studying non-ideal compressible fluid dynamics and testing orc expanders
Organic Rankine Cycle (ORC) power systems are receiving increased recognition for the conversion of thermal energy when the source potential and/or its temperature are comparatively low. Mini-ORC units in the power output range of 350 kWe are actively studied for applications inv
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Preliminary design of the orchid
A facility for studying non-ideal compressible fluid dynamics and testing orc expanders
Organic Rankine Cycle (ORC) power systems are receiving increased recognition for the conversion of thermal energy when the source potential and/or its temperature are comparatively low. Mini-ORC units in the power output range of 350 kWe are actively studied for applications inv
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In evaporators, the distribution of the liquid and vapor phases among the channels is a convoluted problem, depending on a wide range of parameters. However, maldistribution causes important losses of performance. Due to their complexity, the accurate modeling of such two-phase f
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Contributed
12 records found
Weight Estimation Of Turboshaft Engines
Continuation in the development of WEST: a component based preliminary design and weight estimation tool for turbine engines
The need for more efficient aircraft has led to the conception of innovative engine configurations, such as the combined-cycle engine proposed by Delft University of Technology or the Water-enhanced turbofan developed by MTU and Pratt & Whitney. The evaluation of the potentia
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Techno-Economic feasibility analysis of Solid-Oxide Fuel Cell-Gas Turbine based hybrid propulsion system fueled by Hydrogen
How a Solid-Oxide Fuel Cell can impact the performance of the propulsion system and the economics of the aircraft
The world is moving towards sustainability and there is immense pressure on Aerospace Industry to reduce its emissions to contribute to a carbon-neutral world. However, maturing gas turbine technology is a big bottleneck towards this goal and hence, this project focuses on the te
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Weight Estimation of Gas Turbine Engines
Development of a Component-Based Preliminary Engine Design Tool
The need for more efficient aircraft has spawned the conception of a variety of novel engine and aircraft architectures, such as the combined-cycle engine proposed by researchers at Delft University of Technology. To evaluate the potential benefits of these concepts comprehensive
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Dynamic Modelling of a Solid Oxide Fuel Cell System
Integration of 1-D SOFC Dynamic Model with the Balance of Plant components
The constant pressure on the maritime sector to reduce Greenhouse Gas (GHG) emissions has led the shipping industry to search for alternatives, such as zero-emissions propulsion systems, which would allow meeting the 2050 target imposed by International Maritime Organization (IMO
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Feasibility of an Engine Architecture using Bypass Cooled Cooling Air
For Current and Future High Bypass Turbofans
This study analyses the feasibility of an engine architecture using bypass cooled cooling air as a method for reducing specific fuel consumption of current and future high bypass turbofan engines. As cooled cooling air reduces required turbine cooling massflow, a major source of
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Novel Experiments for the Investigation of Non-Ideal Compressible Fluid Dynamics
The ORCHID and First Results of Optical Measurements
The vast number of pioneering theoretical developments inthe area of non-classical gas dynamics together with the rising number ofapplications of organic Rankine cycle (ORC) technology have shaped a new branchof fluid mechanics called non-ideal compressible fluid dynamics (NICFD)
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Turbocharging an Automotive Hydrogen PEM Fuel Cell Air Processing System
Simulations on Boost Power and Fuel Saving
Hydrogen Polymer Electrolyte Membrane (PEM) fuel cell technology is becoming increasingly popular in the transportation sector, especially the automotive industry. It can power electric drives by converting hydrogen into electricity in a chemical reaction with oxygen, whose produ
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Cooled Turbine Model
Development of a semi-empirical cooled turbine performance simulation model for aero engines
A significant trend in aero engine design has been the rise in turbine inlet temperatures, as well as the drive to produce raise efficiency. Since the 1960s, turbine inlet temperatures have exceeded turbine material limits, with turbine cooling systems being used to bridge the ga
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Cooled Turbine Model
Development of a semi-empirical cooled turbine performance simulation model for aero engines
A significant trend in aero engine design has been the rise in turbine inlet temperatures, as well as the drive to produce raise efficiency. Since the 1960s, turbine inlet temperatures have exceeded turbine material limits, with turbine cooling systems being used to bridge the ga
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Exploration of a Reverse Turbo-Brayton Cryocooler for Carbon Neutral Aeronautical Applications
Integrated Cryocooler Design and Tank Modeling for Cryogenic Liquid Hydrogen in Long Range Flight
Climate change is a pressing issue. Hydrogen aircraft are an excellent alternative to current kerosene aircraft, and appear to be the most viable long-term solution for net-zero flight. One of the main challenges for hydrogen aircraft is to sustain a low boil-off rate. This resea
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Exploration of a Reverse Turbo-Brayton Cryocooler for Carbon Neutral Aeronautical Applications
Integrated Cryocooler Design and Tank Modeling for Cryogenic Liquid Hydrogen in Long Range Flight
Climate change is a pressing issue. Hydrogen aircraft are an excellent alternative to current kerosene aircraft, and appear to be the most viable long-term solution for net-zero flight. One of the main challenges for hydrogen aircraft is to sustain a low boil-off rate. This resea
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Modelling and Design Guidelines for Ram Air Ducts Using the Meredith Effect
Applied to an Organic Rankine Cycle Waste Heat Recovery System
With climate change posing increasing risks, the Advisory Council for Aviation Research and Innovation in Europe (ACARE) aims to reduce CO2 emissions by 75% and NOx emissions by 90% per passenger kilometer by 2050, compared to a baseline aircraft from 2000. The ARENA project addr
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