Design Metrics for Evaluating the Propulsive Efficiency of Future Ships
نویسنده
چکیده
There is an increasing need for the ship design process to take account of environmental issues such as the emission of greenhouse gases and the likely extension of a carbon dioxide charging mechanism to international shipping. These issues, together with the need for economic viability, provide further incentives to improve the efficiency of propulsion of ships. The main components of powering are firstly reviewed. Individual components and other power saving devices are identified which should contribute to improvements in the overall efficiency of propulsion. Suitable design metrics and procedures, taking into account economic and environmental factors, are recommended for the design of future ships.
منابع مشابه
Evaluating the Effectiveness of Daylight Performance Metrics in Predicting Visual Comfort Case Study: Educational Architecture Design Studios in Tehran
It is essential to ensure that adequate daylight penetrates in, especially, educational environments. In spite of positive significant impacts of daylight on the emotions, concentration, and learning of students, an exceeded amount of light will lead to glare and visual dissatisfaction. Over the last few years, with the help of simulation tools and lighting indices, it is possible to predict li...
متن کاملDelving Into the Details of Evaluating Public Engagement Initiatives; Comment on “Metrics and Evaluation Tools for Patient Engagement in Healthcare Organization- and System-Level Decision-Making: A Systematic Review”
Initiatives to engage the public in health policy decisions have been widely endorsed and used, yet agreed upon methods for systematically evaluating the effectiveness of these initiatives remain to be developed. Dukhanin, Topazian, and DeCamp have thus developed a useful taxonomy of evaluation criteria derived from a systematic review of published evaluation tools that might serve as the basis...
متن کاملAERO-THERMODYNAMIC OPTIMIZATION OF TURBOPROP ENGINES USING MULTI-OBJECTIVE GENETIC ALGORITHMS
In this paper multi-objective genetic algorithms were employed for Pareto approach optimization of turboprop engines. The considered objective functions are used to maximize the specific thrust, propulsive efficiency, thermal efficiency, propeller efficiency and minimize the thrust specific fuel consumption. These objectives are usually conflicting with each other. The design variables consist ...
متن کاملUncertainties due to Fuel Heating Value and Burner Efficiency on Performance Functions of Turbofan Engines Using Monte Carlo Simulation
In this paper, the impacts of the uncertainty of fuel heating value as well as the burner efficiency on performance functions of a turbofan engine are studied. The mean value and variance curves for thrust, thrust specific fuel consumption as well as propulsive, thermal and overall efficiencies are drawn and analyzed, considering the aforementioned uncertainties based on various Mach numbers at...
متن کاملEvaluating the consequences of the new standards on noise conditions in ships
Noise is one of the main parameters to be considered to achieve a healthy indoor ambience in ferries. Therefore, the noise standards need to be more specialized and specifically based on real sampled data and case studies. In the present research, the noise levels in a ship, under different working conditions, were sampled and compared with those specified in the new and old standards. An initi...
متن کامل