scholarly journals Marine Energy Resource Assessment at Reconnaissance to Feasibility Study Stages

2016 ◽  
Vol 23 (0) ◽  
pp. 189-198 ◽  
Author(s):  
Takuji Waseda ◽  
Adrean Webb ◽  
Keiji Kiyomatsu ◽  
Wataru Fujimoto ◽  
Yasumasa Miyazasa ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Energy Resource ◽  
Resource Assessment ◽  
Marine Energy

Technologising the wave

2020 ◽  
Vol 3 (1) ◽  
pp. 101-122
Author(s):  
Marfuga Iskandarova ◽  
Elena Simakova ◽  
Keyword(s):  
Renewable Energy ◽  
Wave Energy ◽  
Energy Resource ◽  
Ocean Waves ◽  
Resource Assessment ◽  
Natural Phenomenon ◽  
Low Carbon ◽  
Carbon Policy ◽  
Marine Energy ◽  
The Uk

Despite the recent shift from renewable energy to a low carbon policy, the UK policy discourse still recognises marine energy as part of the country’s future energy mix. Production of what we call an “assemblage” of technology and ocean waves triggers complex sets of initiatives that provide the basis for the economic viability and credibility of wave energy extraction. However, questions are rarely asked about how the natural phenomenon being part of this assemblage is construed as a resource to become a key element of promises and assessments of potential of renewable energy. This study sheds light on under-explored aspects of the credibility–economy and valuation practices formed around renewable energy that have not yet been problematised in social studies of energy. Arguing that ocean waves become an energy resource largely through resource assessment practices, we examine such practices in the context of the production of scientific and policy discourses around wave energy. Considering waves as an object of expertise, we examine how “wave data” constituted through measurements, statistical analysis, modelling and visualisation, contribute to the assessment and legitimisation of wave energy developments. We also evaluate the prospects for wave energy to be a “good” in future economic exchange.

Marine Energy Resource Assessment for Orkney and Pentland Waters With a Coupled Wave and Tidal Flow Model

2014 ◽  
Author(s):  
Vengatesan Venugopal ◽  
Reddy Nemalidinne
Keyword(s):  
Flow Model ◽  
Tidal Flow ◽  
Energy Resource ◽  
Coupled Model ◽  
Resource Assessment ◽  
Orkney Islands ◽  
Marine Energy ◽  
Current Profiler ◽  
Adcp Measurements ◽  
Coupled Wave

Some preliminary results obtained from a coupled wave and 3D tidal flow numerical model, applied to the Orkney and Pentland waters in the Scottish region of the United Kingdom, are reported in this paper. The coupled wave and flow model was applied to the Orkney Islands comprising a domain of 1.25°W – 5°W and 58.25° N – 59.75°N. The model was run by boundary inputs of wind and water level extracted from European Centre for Medium Range Weather Forecasts (ECMWF) and Danish Hydraulic Institute’s (DHI) global tidal model respectively. The model has been calibrated and validated with wave buoy and ADCP (Acoustic Doppler and Current Profiler) measurements. The depth-wise current velocity components predicted by the model were compared with ADCP measurements for three sites in the Pentland Firth. The results indicated that the coupled model worked well and the tidal current velocities from the model correlated well with ADCP measurements at different depths.

scholarly journals Resource Assessment of Tidal Stream Power in Pakiputan Strait, Davao Gulf, Philippines

2021 ◽  
Vol 11 (3) ◽  
pp. 7233-7239
Author(s):  
E. V. Palconit ◽  
J . R. Villanueva ◽  
N. J. Enano ◽  
M. J. Buhali ◽  
A. C. Mascariñas ◽  
...  
Keyword(s):  
Energy Resource ◽  
Acoustic Doppler Current Profiler ◽  
Tidal Energy ◽  
Resource Assessment ◽  
The Philippines ◽  
Dynamics Modeling ◽  
Stream Power ◽  
Marine Energy ◽  
Current Profiler ◽  
Energy Conversion Systems

During the last years, there are ongoing efforts on the development of tidal energy conversion systems in the Philippines. This study conducts tidal energy resource assessment in the Pakiputan Strait following a methodology outlined as stage 2a tidal resource assessment published by the European Marine Energy Centre (EMEC). The study assessed the preliminary results of the tidal velocities at Pakiputan Strait with a mean spring peak velocity (Vmsp) of 1.7m/s at 3m from the water surface from 15 days of continuous data collection using a seabed-mounted acoustic Doppler current profiler. This corresponded to an estimated Annual Energy Production (AEP) of 1350kWh/y for 1m2 of capture area of the generic device. Sensitivity analysis showed that the spatial distribution of hydrodynamic model results does not vary significantly with variations in certain input parameters. It further showed that a 10% decrease in the nominal value of Vmsp on-site led to a 15% decrease in the nominal value of AEP, while a 10% increase in the nominal value of Vmsp led to a 30% increase in the nominal value of AEP, assuming that the considered Vmsp still corresponded to the velocity distribution from observations. A static survey and the use of computational fluid dynamics modeling are recommended to further enhance the analysis of the study.

FEATURES OF WIND FIELD OVER THE SEA SURFACE IN THE COASTAL AREA BASED ON SAR OBSERVATIONS

2017 ◽  
Author(s):  
Anna Monzikova ◽  
Anna Monzikova ◽  
Vladimir Kudryavtsev Vladimir ◽  
Vladimir Kudryavtsev Vladimir ◽  
Alexander Myasoedov ◽  
...  
Keyword(s):  
Wind Stress ◽  
Surface Wind ◽  
Quantitative Description ◽  
Energy Resource ◽  
Resource Assessment ◽  
Internal Boundary Layer ◽  
Offshore Wind ◽  
Internal Boundary ◽  
Sar Images ◽  
Surface Wind Stress

“Wind-shadowing” effects in the Gulf of Finland coastal zone are analyzed using high resolution Envisat Synthetic Aperture Radar (SAR) measurements and model simulations. These effects are related to the internal boundary layer (IBL) development due to abrupt change the surface roughness at the sea-land boundary. Inside the "shadow" areas the airflow accelerates and the surface wind stress increases with the fetch. Such features can be revealed in SAR images as dark areas adjacent to the coastal line. Quantitative description of these effects is important for offshore wind energy resource assessment. It is found that the surface wind stress scaled by its equilibrium value (far from the coast) is universal functions of the dimensionless fetch Xf/G. Wind stress reaches an equilibrium value at the distance Xf/G of about 0.4.

Holistic marine energy resource assessments: A wave and offshore wind perspective of metocean conditions

2021 ◽  
Vol 170 ◽  
pp. 286-301
Author(s):  
Bryson Robertson ◽  
Gabrielle Dunkle ◽  
Jonah Gadasi ◽  
Gabriel Garcia-Medina ◽  
Zhaoqing Yang
Keyword(s):  
Energy Resource ◽  
Offshore Wind ◽  
Marine Energy

GIS-linked tidal range energy resource assessment

2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Mirza Salman Baig ◽  
Zaheer Uddin ◽  
Ambreen Insaf
Keyword(s):  
Energy Resource ◽  
Resource Assessment ◽  
Tidal Range

scholarly journals HF Radars for Wave Energy Resource Assessment Offshore NW Spain

2021 ◽  
Vol 13 (11) ◽  
pp. 2070
Author(s):  
Ana Basañez ◽  
Vicente Pérez-Muñuzuri
Keyword(s):  
Wave Energy ◽  
Numerical Models ◽  
Wave Spectrum ◽  
Energy Resource ◽  
Electrical Energy ◽  
Resource Assessment ◽  
Electricity Production ◽  
Statistical Validation ◽  
Wave Energy Converters ◽  
Energy Converters

Wave energy resource assessment is crucial for the development of the marine renewable industry. High-frequency radars (HF radars) have been demonstrated to be a useful wave measuring tool. Therefore, in this work, we evaluated the accuracy of two CODAR Seasonde HF radars for describing the wave energy resource of two offshore areas in the west Galician coast, Spain (Vilán and Silleiro capes). The resulting wave characterization was used to estimate the electricity production of two wave energy converters. Results were validated against wave data from two buoys and two numerical models (SIMAR, (Marine Simulation) and WaveWatch III). The statistical validation revealed that the radar of Silleiro cape significantly overestimates the wave power, mainly due to a large overestimation of the wave energy period. The effect of the radars’ data loss during low wave energy periods on the mean wave energy is partially compensated with the overestimation of wave height and energy period. The theoretical electrical energy production of the wave energy converters was also affected by these differences. Energy period estimation was found to be highly conditioned to the unimodal interpretation of the wave spectrum, and it is expected that new releases of the radar software will be able to characterize different sea states independently.

scholarly journals Evaluation and re-understanding of the global natural gas hydrate resources

2021 ◽  
Vol 18 (2) ◽  
pp. 323-338
Author(s):  
Xiong-Qi Pang ◽  
Zhuo-Heng Chen ◽  
Cheng-Zao Jia ◽  
En-Ze Wang ◽  
He-Sheng Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Material Balance ◽  
Energy Resource ◽  
Resource Assessment ◽  
Future Trend ◽  
Natural Gas Hydrate ◽  
The Future ◽  
Recoverable Resources

AbstractNatural gas hydrate (NGH) has been widely considered as an alternative to conventional oil and gas resources in the future energy resource supply since Trofimuk’s first resource assessment in 1973. At least 29 global estimates have been published from various studies so far, among which 24 estimates are greater than the total conventional gas resources. If drawn in chronological order, the 29 historical resource estimates show a clear downward trend, reflecting the changes in our perception with respect to its resource potential with increasing our knowledge on the NGH with time. A time series of the 29 estimates was used to establish a statistical model for predict the future trend. The model produces an expected resource value of 41.46 × 1012 m3 at the year of 2050. The statistical trend projected future gas hydrate resource is only about 10% of total natural gas resource in conventional reservoir, consistent with estimates of global technically recoverable resources (TRR) in gas hydrate from Monte Carlo technique based on volumetric and material balance approaches. Considering the technical challenges and high cost in commercial production and the lack of competitive advantages compared with rapid growing unconventional and renewable resources, only those on the very top of the gas hydrate resource pyramid will be added to future energy supply. It is unlikely that the NGH will be the major energy source in the future.

scholarly journals Proposal to Refine Solar Radiation of Typical Meteorological Year Database and Evaluation on the Influence of Air-Conditioning Load

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 524
Author(s):  
Jihui Yuan ◽  
Kazuo Emura ◽  
Craig Farnham
Keyword(s):  
Solar Radiation ◽  
Air Conditioning ◽  
Energy Savings ◽  
Energy Resource ◽  
Global Solar Radiation ◽  
Resource Assessment ◽  
Weather Data ◽  
Diffuse Solar Radiation ◽  
Chinese Standard ◽  
The Impact

The Typical meteorological year (TMY) database is often used to calculate air-conditioning loads, and it directly affects the building energy savings design. Among four kinds of TMY databases in China—including Chinese Typical Year Weather (CTYW), International Weather for Energy Calculations (IWEC), Solar Wind Energy Resource Assessment (SWERA) and Chinese Standard Weather Data (CSWD)—only CSWD is measures solar radiation, and it is most used in China. However, the solar radiation of CSWD is a measured daily value, and its hourly value is separated by models. It is found that the cloud ratio (diffuse solar radiation divided by global solar radiation) of CSWD is not realistic in months of May, June and July while compared to the other sets of TMY databases. In order to obtain a more accurate cloud ratio of CSWD for air-conditioning load calculation, this study aims to propose a method of refining the cloud ratio of CSWD in Shanghai, China, using observed solar radiation and the Perez model which is a separation model of high accuracy. In addition, the impact of cloud ratio on air-conditioning load has also been discussed in this paper. It is shown that the cloud ratio can yield a significant impact on the air conditioning load.

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