scholarly journals Research on Energy Efficiency Design Index Calculation Method for the Hybrid Ship

2021 ◽  
Vol 2029 (1) ◽  
pp. 012087
Author(s):  
Zhifang Wang ◽  
Zixuan Yang ◽  
Shuming Xiao
Keyword(s):  
Energy Efficiency ◽  
Calculation Method ◽  
Energy Efficiency Design Index ◽  
Index Calculation

scholarly journals An Energy Consumption Approach to Estimate Air Emission Reductions in Container Shipping

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 278
Author(s):  
Ernest Czermański ◽  
Giuseppe T. Cirella ◽  
Aneta Oniszczuk-Jastrząbek ◽  
Barbara Pawłowska ◽  
Theo Notteboom
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Early Stage ◽  
Management Plan ◽  
Policy Formulation ◽  
Container Shipping ◽  
Shipping Industry ◽  
Emission Reductions ◽  
Energy Efficiency Design Index ◽  
Carbon Dioxide Co2

Container shipping is the largest producer of emissions within the maritime shipping industry. Hence, measures have been designed and implemented to reduce ship emission levels. IMO’s MARPOL Annex VI, with its future plan of applying Tier III requirements, the Energy Efficiency Design Index for new ships, and the Ship Energy Efficiency Management Plan for all ships. To assist policy formulation and follow-up, this study applies an energy consumption approach to estimate container ship emissions. The volumes of sulphur oxide (SOx), nitrous oxide (NOx), particulate matter (PM), and carbon dioxide (CO2) emitted from container ships are estimated using 2018 datasets on container shipping and average vessel speed records generated via AIS. Furthermore, the estimated reductions in SOx, NOx, PM, and CO2 are mapped for 2020. The empirical analysis demonstrates that the energy consumption approach is a valuable method to estimate ongoing emission reductions on a continuous basis and to fill data gaps where needed, as the latest worldwide container shipping emissions records date back to 2015. The presented analysis supports early-stage detection of environmental impacts in container shipping and helps to determine in which areas the greatest potential for emission reductions can be found.

Power Transformers Health Index Calculation Method Based on Cloud Model and Fuzzy Evidential Reasoning

2014 ◽  
Vol 1070-1072 ◽  
pp. 1021-1028
Author(s):  
De Hua Cai ◽  
Xi Yang ◽  
Rui Chuang Wang ◽  
Cheng Zhi Ma ◽  
Jin Cheng ◽  
...  
Keyword(s):  
Calculation Method ◽  
Cloud Model ◽  
Evidential Reasoning ◽  
Evaluation Index ◽  
Power Transformers ◽  
Health State ◽  
Health Index ◽  
Degree Of Belief ◽  
Fuzzy Evidential Reasoning ◽  
Index Calculation

Transformers health index calculation method based on cloud model and fuzzy evidential reasoning is proposed. According to the multi-level and multifactor of evaluation index information of power transformers, a layered evaluation index model is established. In order to deal with the ambiguity and uncertainty information of evaluation index, a normal cloud model is introduced, inferred the fuzzy degree of belief in the health state of evaluation index. Then use the fuzzy evidential reasoning method merge information of evaluation Index, inferred the degree of belief in the health state-level of transformer, calculated the health index of transformer. The results of an example analysis test its rationality and effectiveness.

Development of a Calculation Method for Fuel Consumption of Ships in Actual Seas With Performance Evaluation

2013 ◽  
Author(s):  
Masaru Tsujimoto ◽  
Mariko Kuroda ◽  
Naoto Sogihara
Keyword(s):  
Energy Efficiency ◽  
Fuel Consumption ◽  
Calculation Method ◽  
Weather Condition ◽  
Hydrodynamic Performance ◽  
Added Resistance ◽  
Operating Limits ◽  
Ship Hydrodynamic ◽  
Main Engine ◽  
Actual Seas

Greenhouse gas shall be reduced from shipping sector. For that purpose the regulation of EEDI (energy efficiency design index for new ships) and SEEMP (ship energy efficiency management plan) have been entry into force from 2013. In order to improve the energy efficiency in ship operation it is necessary to predict the fuel consumption accurately. In actual seas the wave effect is the dominant component of the external forces. In particular it is well known the bow shape above water affects the added resistance in waves. To reflect the effect of the bow shape a method which takes into account the result of simplified tank tests is proposed here. Using the results of tank tests the effect of the bow shape above water can be evaluated with accuracy as well as with robustness. Regarding to the fuel consumption it should be evaluated by combining the ship hydrodynamic performance with the engine characteristics. Especially the operating limits of the main engine, such as the torque limit and the over load protection, are affected to the ship hydrodynamic performance. In rough weather condition the revolution of the main engine will be reduced to be below the operating limits of the engine. This causes the large decrease of ship speed. To prevent the increase of fuel consumption, a control system by Fuel Index as an index of fuel injection has been applied to some ships. The calculation method for the fuel consumption by using Fuel Index is presented. In this paper following contents are reported; 1) development of a calculation method for the added resistance due to waves combined with the simplified tank tests in short waves, 2) comparison of the calculation method with onboard measurement, 3) development of a calculation method for the fuel consumption considering the engine operating mode in actual seas and 4) comparison of the method with onboard measurement of a container ship. From these investigations the availability of the present method is confirmed.

scholarly journals A comparative review of the resistance of a 37,000 dwt Chemical Tanker based on experimental tests and calculations

2020 ◽  
Vol 1 ◽  
pp. 59-66
Author(s):  
Liviu Crudu ◽  
Radu Bosoancă ◽  
Dan Obreja
Keyword(s):  
Energy Efficiency ◽  
Experimental Tests ◽  
Full Scale ◽  
The Other ◽  
Towing Tank ◽  
Ship Resistance ◽  
Comparative Review ◽  
Cfd Applications ◽  
Energy Efficiency Design Index ◽  
Comparison Of The Results

The evaluation of ship resistance is of paramount importance having a decisive impact on the economic performances and efficiency depending on mission. If new IMO requirements through the Energy Efficiency Design Index (EEDI) are taken into account the necessity to have more and more accurate tools capable to consider the influences of different parameters became mandatory. The availability of towing tank facilities and the full scale trials are the practical means in order to be able to confirm the accuracy of theoretical formulations and to define the limits of CFD applications. Based on the results of the towing tank tests, a direct comparison with the results provided by classical methods and CFD computations can be systematically can be performed. On the other hand, the influences of the modifications operated on the fore part of the ship aretheoretically evaluated and compared with the towing tank results. Consequently, the paper is focused on the comparison of the results evaluated using different tools which have been carried out for a Chemical Tanker built by Constanta Shipyard Romania.

scholarly journals Influence of EEDI (Energy Efficiency Design Index) on Ship–Engine–Propeller Matching

2019 ◽  
Vol 7 (12) ◽  
pp. 425 ◽  
Author(s):  
Ren ◽  
Ding ◽  
Sui
Keyword(s):  
Energy Efficiency ◽  
Co2 Emission ◽  
Greenhouse Gas Emission ◽  
Propulsion System ◽  
Matching Theory ◽  
Matching Process ◽  
Marine Diesel ◽  
Energy Efficiency Design Index ◽  
Relationship Of ◽  
The Relationship

With the increasingly strict international GHG (greenhouse gas) emission regulations, higher requirements are placed on the propulsion system design of conventional ships. Playing an important role in ship design, construction and operation, ship–engine–propeller matching dominantly covers the CO2 emission of the entire ship. In this paper, firstly, a ship propulsion system matching platform based on the ship–engine–propeller matching principle and its application on WinGD 5 × 52 marine diesel engine have been investigated. Meeting the energy efficiency design index (EEDI) regulation used to calculate the ship CO2 emission is essential and ship–engine–propeller matching has to be carried out with EEDI into consideration. Consequently, a procedure is developed combining the system matching theory and EEDI calculation, which can provide the matching results as well as the corresponding EEDI value to study the relationship between EEDI and ship–engine–propeller matching. Furthermore, a comprehensive analysis is performed to obtain the relationship of EEDI and system matching parameters, such as ship speed, effective power and propeller diameter, reflecting the trend and extent of EEDI when changing these three parameters. The results of system matching parameters satisfying different EEDI phases indicate the initial value selection in matching process to provide reference for the design of ship, engine and propeller under the EEDI regulations.

Research on the Influence of Wind Energy on New Energy Utilization Coefficient of EEDI

2013 ◽  
Vol 744 ◽  
pp. 561-565 ◽  
Author(s):  
Cai Ling Li ◽  
Song Zhou ◽  
Ye Han
Keyword(s):  
Energy Efficiency ◽  
Wind Energy ◽  
Alternative Energy ◽  
Energy Utilization ◽  
Calculation Formula ◽  
Energy Technology ◽  
Utilization Coefficient ◽  
New Energy ◽  
Energy Efficiency Design Index ◽  
Great Harm

Currently, the emissions discharged by ships are becoming more and more serious, which brings a great harm to the atmospheric and marine environment. In order to solve the emissions, especially of CO2 emission, the new ship energy efficiency design index (EEDI) has been introduced to reduce it. According to EEDI calculation formula, the use of new energy technology can reduce marine EEDI. Nowadays, wind energy as a clean and renewable energy, is an ideal alternative energy to be applied on ships. But until now, there is still no definite calculation formula and value regulation to parameters involved in the application of new energy on ships, including new energy utilization coefficient.

Evaluations on Ship Performance Under Varying Operational Conditions

2015 ◽  
Author(s):  
Lokukaluge P. Perera ◽  
Brage Mo ◽  
Leifur Arnar Kristjánsson ◽  
Petter Chr. Jønvik ◽  
Jan Øivind Svardal
Keyword(s):  
Energy Efficiency ◽  
Emission Control ◽  
Management Plan ◽  
Modern Technology ◽  
Control Measures ◽  
Shipping Industry ◽  
Operational Conditions ◽  
Energy Efficiency Design Index ◽  
Main Engine ◽  
Emission Control Measures

Various emission control measures have been introduced in the recent years for improving vessel performance in the shipping industry. That consists of: Energy Efficiency Design Index (EEDI) for new ships and Ship Energy Efficiency Management Plan (SEEMP) and Energy Efficiency Operational Indicator (EEOI) for all ships. These emission control measures enforce the shipping industry to improve operational conditions and to implement modern technology for more energy efficient shipping fleets. Therefore, this study presents preliminary data analysis of a selected vessel for monitoring its performance along the ship routes. The results consist of observing vessel performance under several navigation parameters: ship GPS speed (i.e. speed over the ground), log speed, course, fuel consumption, main and auxiliary engine power, main engine shaft RPM, loading and draft conditions with respect to the route, voyage time and wind conditions. Furthermore, these parameters have been used to analyze potential and optimal energy usage situations in ship navigation with respect to the EEOI, in which represents an important part of the SEEMP.

Research on Calculation Method of Alternative Fuel Quantity for Natural Gas Bus

2014 ◽  
Vol 687-691 ◽  
pp. 415-418
Author(s):  
Xiao Li ◽  
Li Liu ◽  
Zhong Xiang Li
Keyword(s):  
Energy Efficiency ◽  
Natural Gas ◽  
Calculation Method ◽  
Calorific Value ◽  
Alternative Fuel ◽  
Correction Coefficient ◽  
Actual Situation ◽  
Two Factors ◽  
Natural Gas Vehicle ◽  
Selection Of

There is no more in-depth research in the amount of alternative between natural gas and tradition fuel. The paper consider two factors about gas calorific value and vehicle level and put forward the fuel calorific value correction coefficient and vehicle energy efficiency correction coefficient. On this basis, the coefficient table and calculation method was established. The paper proved that because of the influence of the factors, equivalent ratio in the range of 1.13~1.67. The method can indicate the gas replacement more scientific and real, because of consider of the actual situation of application of the enterprise.The research can guide the selection of natural gas vehicle reasonable and scientific.

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