Optimization of a simple LNG process using sequential quadratic programming

The efficiency of using sequential quadratic programming (SQP) for the optimization of a PRICO process for the production of liquefied natural gas (LNG) is demonstrated. Most of the returned objective values have been better, and the execution times much lower, than in most previously published work on similar optimization cases. The optimization runs discussed in this paper require around 5 min of execution time.acceptedVersio

BIGCCS Innovations – Measures to Accelerate CCS Deployment

AbstractAfter six years in operation, BIGCCS International Research Centre is in its final phase, and results are being produced at high speed. The ultimate goal for the BIGCCS centre is to contribute to the acceleration of deployment of CCS technologies. Therefore, the Centre has put considerable emphasis on generating useful results to its industrial partners, and results with a significant potential for commercialization. The paper describes 22 of the most promising innovations identified under the Centre. These 22 innovations are related to capture, transport, storage and value chain, and are but a few of all potential innovations identified. The paper also discusses how BIGCCS has managed innovations, which are classified according to a nine-point Technology Readiness Level scheme

NCCS - Annual Report 2018

publishedVersio

NCCS - Annual Report 2018

publishedVersio

Scenarios for remote gas production

The amount of natural gas resources accessible via proven production technology and existing infrastructure is declining. Therefore, smaller and less accessible gas fields are considered for commercial exploitation. The research project Enabling production of remote gas builds knowledge and technology aiming at developing competitive remote gas production based on floating LNG and chemical gas conversion. In this project, scenarios are used as basis for directing research related to topics that affect the overall design and operation of such plants. Selected research areas are safety, environment, power supply, operability and control. The paper summarises the scenario building process as a common effort among research institutes and industry. Further, it documents four scenarios for production of remote gas and outlines how the scenarios are applied to establish research strategies and adequate plans in a multidisciplinary project. To ensure relevance of the scenarios, it is important to adapt the building process to the current problem and the scenarios should be developed with extensive participation of key personnel.Remote gas Natural gas Scenario building Research strategy LNG Chemical gas conversion

An experimental method for studying the discrete droplet impact phenomena in a flammable gas environment

To improve the initial design as well as to gain insight into operational issues of heat exchangers and other process equipment involving complex two-phase flow phenomena, one can choose to conduct full-scale tests. Another possibility, which we consider here, is to gain better and more detailed knowledge of the relevant two-phase flow phenomena, both by numerical and experimental studies. This article presents an experimental method for studying the droplet-pool impact phenomena in a flammable gas environment by using high-speed photography. The design of the test cell enables the integration of different parts which are responsible for phenomena generation, temperature and pressure measurements, and the cell can be operated in the gas-tight condition. In order to discretize the impact phenomena, the high impact frequency is reduced through a special design of an electrical “shutter”. Targeted safety measures are employed in the experiment. Two regimes of n-pentane droplets impacting with a deep pool of the same fluid are identified. Experiments have also been conducted with distilled water and air, for reference. It is found that the flow of n-pentane is more agitated than that of distilled water, and that in a similar diameter range, the transition from coalescence to jetting of n-pentane occurs at a lower velocity level than for water. The main reason for this more agitated flow condition is the low viscosity and surface tension of n-pentane

BIGCCS Centre-supporting Large-Scale CCS Implementation

BIGCCS Centre is an international research centre for CCS as a climate mitigation measure supporting large scale deployment of CO2 capture, transport and storage by developing new knowledge, fostering breakthrough technology and promoting innovation and value creation at all steps along the CO2 chain. The Centre is managed by SINTEF Energy Research and involves 22 partners from industry and academia. This paper presents the BIGCCS Centre, the results so far and how in-depth fundamental research contributes to enhancing innovation in the CCS chain