The electrification of industrial process heat: Implementation of thermal energy storage and the potential of novel high-temperature heat pump technologies

Electrification and decarbonization of industrial process heat is an important next step in the energy transition to reduce greenhouse gas (GHG) emissions. This study provides an in-depth analysis of how in the current industrial landscape the combination of commercially available electric heating technologies with the implementation of thermal...

Performance Analysis of a Retrofitted Reversible Solid Oxide Cell and a Combined Cycle Gas Turbine: An assessment of exergy efficiencies, greenhouse gas emissions, and gross profits.

The vast amounts of greenhouse gas (GHG) emissions, surging gas prices, and increasing proportion of intermittent energy sources force the energy sector to structurally modify the energy system. The reversible Solid Oxide Cell (rSOC) is considered to be part of the solution due to its high efficiency, good scalability, and ability to balance the...

Waste heat recovery of future marine propulsion systems: A techno-economic process-oriented approach

In response to climate change, the marine sector is increasingly focused on the energy transition. New marine power plants operating more efficiently and on cleaner fuels are receiving significantly more attention. While the transition to different power plants and fuels results in reduced fossil fuel consumption and emissions, waste heat...

Optimisation of pump operation to increase the cycle efficiency of an ORC during part load

The global warming and increase in energy use demands the industry to come up with ideas to lower the CO₂ production and save valuable energy. Organic Rankine cycles have a great potential as low grade heat can be converted into electrical energy. In the last ten years, research in this particular field has increased together with the...

Evaluation of an Ammonia Fueled Combine-cycle Gas Turbine Power System on Maritime Usage

Ammonia fuel has been widely considered as an attractive solution for reducing the green house gas emissions over recent years. Adapting ammonia as fuel on ships would highly reduce the carbon footprint of international shipping and off-shore transportation. Among the different systems currently under development for carbon-free power production...

Dynamic Characteristics of Industrial Heat Pump Operation: A modeling study

In order to reach the goals of the Paris Agreement, global emissions must decrease at a high rate. Looking at the industrial sector, the largest share of energy is used for process heating, with fossil fuels as its primary source. A way to improve the energy efficiency and reduce the emissions of process heating is by the integration of heat...

Modelling Differential Diffusion in Turbulent Non-Premixed Hydrogen Flames

In the future, fossil fuels will be replaced by renewable sources. Hydrogen seems to be a promising energy carrier (fuel). A lot of research has been conducted on the combustion of hydrogen, but the effect of the high diffusivity of hydrogen compared to other species (differential diffusion) was often not included in simulations of turbulent...

Boundary layer flashback prediction for high hydrogen flames at gas turbine burner geometry and operating conditions

The idea of using hydrogen as a medium for storing excess renewable energy is gathering momentum but to deliver, several technological advances are required. One of the main challenges is boundary layer flame flashback (BLF) as a key operability issue for low NO_x premixed combustion of hydrogen-enriched fuels; thus design of tools to...

Flexible Alkaline Water Electrolysis: Flexibility limitations for transient electrolyzer operation

A numerical model is developed in Simulink to simulate transient alkaline electrolyzer operation. The model is built to simulate a large scale hydrogen plant in Rjukan, Norway. The model is based on physical relations where available, some plant-specific data is modeled using empirical equations. The model describes the anodic and cathodic...

Controlled Removal of Trace O2 in an H2 Environment of a Small-scale Electrolyser

Power-to-gas (PtG) technology represents a promising route in providing long-term energy security and involves pairing volatile sources of renewable energy (solar and wind energy) with alkaline water electrolysis (AWE) to create a wide range of products based on intermediate hydrogen gas for end-users across various industries such as in fuels,...

Hydrogen Storage in Salt Caverns: Chemical modelling and analysis of large-scale hydrogen storage in underground salt caverns.

In this paper the suitability of compressed hydrogen gas storage in salt caverns is analysed. The presence of microbial sulfate reducing bacteria create a contamination risk of H2S inside the cavern. Key cavern parameters that influence the production of H2S are highlighted by a chemical model. The model uses empirical data provided by...

Effect of H₂ Fuel-Addition and Air-Side CO₂ Dilution on the Stabilization of Turbulent Dutch Natural Gas Jet Diffusion Flames

The turbulent lifted Dutch natural gas jet diffusion flame in cold co-flowing air is widely used in gas turbine operation and subject of the current investigation. In striving to clean and sustainable combustion, adding hydrogen to the Dutch natural gas (DNG) fuel and CO2 in the coflow is promising. Objective of this investigation is to study...

Design and characterization of test facility for large angle diffusers

In industry, fired heaters are used to heat process fluids and to generate steam. The efficiency of these devices is increased with air preheating. Gnerally, the flow through the air preheaters is driven by a centrifugal fan, via forced draft. Through a widening transition duct (large angle diffuser), air flows from the fan towards the air...

Hybrid Electric Turbocharging: Improving the loading capability and efficiency of a dual fuel engine

Emission regulations applied to marine industry for amongst others the propulsion system of a vessel are becoming stricter due to governmental <br/>agreements to lower the greenhouse gas emissions. Engine manufactures<br/>are enhancing their engine designs to reduce the engine fuel consumption, which is commonly done by implementing a...