Low Emission Fast Vessels for Crew Transfer Operations

2021 ◽  
Author(s):  
Nere G. Skomedal ◽  
Trygve H. Espeland
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Offshore Wind ◽  
Synthetic Fuels ◽  
Propulsion Systems ◽  
Net Zero ◽  
Low Emission ◽  
Zero Carbon ◽  
Offshore Oil ◽  
Transfer Vessel

The paper describes recent development of vessel concepts and propulsion systems for high-speed crew transfer vessels within offshore wind and offshore oil & gas industries. Due to the increased global efforts to reduce greenhouse gas emissions, significant reductions in CO2 emissions also from high-speed water transport is needed. Electrification and the use of net zero carbon energy carriers such as batteries, hydrogen or other non-carbon synthetic fuels are necessary to obtain this. It is also necessary to reduce hull resistance and to select the most transport efficient vessel types. As an example of this trend, the recently built surface effect crew transfer vessel CWind Pioneer (picture above) is presented.

Full-scale Performance of the SES Motion Control System

2015 ◽  
Author(s):  
Øyvind F. Auestad ◽  
J. William McFann ◽  
Jan T. Gravdahl
Keyword(s):  
Control System ◽  
Motion Control ◽  
High Speed ◽  
Wind Farm ◽  
Surface Effect ◽  
Vertical Plane ◽  
Full Scale ◽  
Offshore Wind ◽  
Motion Control System ◽  
Air Cushion

The pressurized air cushion on a Surface Effect Ship (SES) can lift up to 80% of total vessel mass. The SES Motion Control System (SES-MCS) controls the vent valves which again controls the air cushion pressure, assuming lift fan air flow is pressurizing the air cushion. By controlling the air cushion pressure one can significantly counteract vertical sea wave disturbances, ensure high passenger comfort and reduce sea-sickness. The case studied in this work is the Umoe Mandal Wave Craft prototype, ’Umoe Ventus’, which is a high-speed offshore wind-farm service vessel specially designed for control in the vertical plane. The SES-MCS can adjust the draft from 1m to 3.2m in less time than the wave period. The SES-MCS can reduce motions significantly in order to perform Operation and Maintenance (O&M) in high seas. The craft is the fastest wind-farm service vessel of its size with high comfort in all relevant sea states. The performance of the SES-MCS is demonstrated through full-scale sea trials.

Selection of Propulsion Systems for High-Speed Advanced Marine Vehicles

1975 ◽  
Vol 12 (01) ◽  
pp. 33-49
Author(s):  
Roderick A. Barr ◽  
Robert J. Etter
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Selection Process ◽  
Propulsion System ◽  
Propulsion Systems ◽  
Propulsive Efficiency ◽  
Marine Vehicles ◽  
Surface Effect Ship ◽  
System Selection ◽  
Ship Performance

Methods and criteria for evaluating and selecting propulsion systems for high-speed marine vehicles such as surface effect ships, hovercraft, hydrofoils, and planing craft are summarized. The problem of matching ship performance (drag, thrust, endurance, etc.) and geometric requirements to propulsion system characteristics to select the best propulsion system for a given application is discussed in some detail. Water-jet, marine propeller and air propulsion systems, including propulsor, propulsor mounting appendages, transmission and engines, are considered. An example utilizing a 4000-ton surface effect ship illustrates that the numerous tradeoffs involved in the selection process may lead to a propulsion system selection based on parameters other than propulsive efficiency. A second example for a 750-ton hydrofoil craft is referenced.

Offshore wind ambitions will surge in northern Europe

2020 ◽  
Keyword(s):  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Job Creation ◽  
Offshore Wind ◽  
Northern Europe ◽  
Content Type ◽  
Northern European ◽  
Net Zero ◽  
Zero Carbon ◽  
And Storage

Subject Offshore wind in northern Europe. Significance Falling costs, the adoption of net zero carbon targets and a growing acceptance of the role ‘green’ hydrogen will play in natural gas decarbonisation have seen northern European countries’ raise their targets for new offshore wind capacity. Energy island concepts are being promoted to tap the resource further offshore. Denmark will build two energy islands as the centrepiece of its plans to deliver huge emissions cuts by 2030. Impacts Oil majors looking towards energy source diversification are likely to be attracted to offshore wind. It is unclear whether Carbon Capture and Storage projects will lose out to ‘green’ hydrogen production or be pursued in tandem. The offshore wind sector and its supply chains are likely to become an important source of new job creation.

Leadership for a climate resilient, net-zero health system: Transforming supply chains to the circular economy

2021 ◽  
pp. 084047042110036
Author(s):  
Neil H. Ritchie
Keyword(s):  
Supply Chains ◽  
Circular Economy ◽  
Multiple Stakeholders ◽  
Natural Systems ◽  
Climate Resilience ◽  
Global Pandemic ◽  
Net Zero ◽  
Climate Action ◽  
Zero Carbon ◽  
Single Use

The global pandemic has taught us that we can focus the attention of the healthcare system on a clear intention when there is a looming threat. Climate action is required from multiple stakeholders particularly private sector suppliers in order to achieve the net-zero carbon emission by 2050 goal established by the Canadian government. Also building climate resilience among healthcare institutions and their supply chains is urgently needed, as they are already affected by a changing climate. By adopting a circular economy framework, the industry can move away from the current damaging take, make waste economic model and adopt a more sustainable model characterized by designing out waste and pollution, keeping products and materials in use, and regenerating natural systems. Health leaders can adopt sharing platforms, product as a service, reduce single use products, encourage extended producer responsibility, and value-based procurement in order to further these aims.

Curved surface effect on high-speed droplet impingement

2020 ◽  
Vol 909 ◽  
Author(s):  
Wangxia Wu ◽  
Qingquan Liu ◽  
Bing Wang
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Curved Surface ◽  
Droplet Impingement

Abstract

scholarly journals The need for a Net Zero Principles Framework to support public policy at local, regional and national levels

2020 ◽  
Vol 35 (7) ◽  
pp. 627-634
Author(s):  
Karen Turner ◽  
Antonios Katris ◽  
Julia Race
Keyword(s):  
Public Policy ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Economic Returns ◽  
Net Zero ◽  
Local Areas ◽  
Zero Carbon ◽  
Near Term ◽  
And Storage ◽  
Do So

Many nations have committed to midcentury net zero carbon emissions targets in line with the 2015 Paris Agreement. These require systemic transition in how people live and do business in different local areas and regions within nations. Indeed, in recognition of the climate challenge, many regional and city authorities have set their own net zero targets. What is missing is a grounded principles framework to support what will inevitably be a range of broader public policy actions, which must in turn consider pathways that are not only technically, but economically, socially and politically feasible. Here, we attempt to stimulate discussion on this issue. We do so by making an initial proposition around a set of generic questions that should challenge any decarbonisation action, using the example of carbon capture and storage to illustrate the importance and complexity of ensuring feasibility of actions in a political economy arena. We argue that this gives rise to five fundamental ‘Net Zero Principles’ around understanding of who really pays and gains, identifying pathways that deliver growing and equitable prosperity, some of which can deliver near-term economic returns, while avoiding outcomes that simply involve ‘off-shoring’ of emissions, jobs and gross domestic product.

Net zero carbon: Energy performance targets for offices

2021 ◽  
Vol 42 (3) ◽  
pp. 349-369
Author(s):  
Robert Cohen ◽  
Karl Desai ◽  
Jennifer Elias ◽  
Richard Twinn
Keyword(s):  
Energy Efficiency ◽  
Minimum Energy ◽  
Energy Performance ◽  
Consultation Process ◽  
Net Zero ◽  
Extensive Consultation ◽  
Operational Energy ◽  
Legislative Framework ◽  
Zero Carbon ◽  
The Uk

The UKGBC Net Zero Carbon Buildings Framework was published in April 2019 following an industry task group and extensive consultation process. The framework acts as guidance for achieving net zero carbon for operational energy and construction emissions, with a whole life carbon approach to be developed in the future. In consultation with industry, further detail and stricter requirements are being developed over time. In October 2019, proposals were set out for industry consultation on minimum energy efficiency targets for new and existing commercial office buildings seeking to achieve net zero carbon status for operational energy today, based on the performance levels that all buildings will be required to achieve by 2050. This was complemented by modelling work undertaken by the LETI network looking into net zero carbon requirements for new buildings. In January 2020 UKGBC published its guidance on the levels of energy performance that offices should target to achieve net zero and a trajectory for getting there by 2035. This paper describes the methodology behind and industry perspectives on UKGBC’s proposals which aim to predict the reduction in building energy intensity required if the UK’s economy is to be fully-powered by zero carbon energy in 2050. Practical application: Many developers and investors seeking to procure new commercial offices or undertake major refurbishments of existing offices are engaging with the ‘net zero carbon’ agenda, now intrinsic to the legislative framework for economic activity in the UK. A UKGBC initiative effectively filled a vacuum by defining a set of requirements including energy efficiency thresholds for commercial offices in the UK to be considered ‘net zero carbon’. This paper provides all stakeholders with a detailed justification for the level of these thresholds and what might be done to achieve them. A worked example details one possible solution for a new office.

Flexible CCS Technologies To Reduce the Cost of Net-Zero Carbon Electricity Systems

2021 ◽  
Author(s):  
Scott Litzelman ◽  
Max Tuttman ◽  
Maruthi Devarakonda ◽  
Maxim Lyubovsky ◽  
Ray Duthu
Keyword(s):  
Net Zero ◽  
Zero Carbon ◽  
Ccs Technologies ◽  
The Cost ◽  
Electricity Systems
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