Efficiency improvement of ships operation by water-fuel emulsion using

Aleksey Malahov,Roman Gudilko,Igor Maslov,Alexander Palagin

doi:10.15587/1729-4061.2016.72544

Aleksey Malahov, Roman Gudilko + Show 2 more

Open Access

https://doi.org/10.15587/1729-4061.2016.72544

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Abstract

The technology of using water-fuel emulsions during operation of vessels serving oil platforms is investigated. When considering the process of burning water fuel emulsions the diffusion theory of combustion with the scheme effective film. The mechanism of combustion of water-fuel droplets is described and the main theoretical expressions were applied. The results of physical experiments relating to the influence of water concentration on the combustion process of the emulsion were obtained during the operation of the main engine of the vessel. It was established how the concentration of water components influence the burning process water fuel emulsions. For different load modes for the main engine of the set numerical values of fuel economy depending on the water concentration in the feed for the combustion of water-fuel emulsion. The result of maximum fuel economy equal to 13.42 % is obtained at the engine load of 80 %. It is shown that with the increasing humidity of the fuel from 1 % to 15 % the temperature of exhaust flue gases of ships is reduced by 52.7 o С. It is established that the presence of water in a lightweight diesel fuel under certain conditions can have a positive effect on the combustion process, which leads to improved characteristics of the resulting torch of fuel burning and heat dissipation.

Highlights

In most cases, when operating of ship power plants, the ships do not use clean fuel, but the fuel emulsion with the presence of the water component [1]
The distribution of water components in the emulsion, which is injected into the working cylinder of the ship main engine (SME), can be studied in the field of temperatures obtained by the jet
Water components did not result in fuel economy, because at its maximum value equal to 15 % the flow reading increased by 16.5 %

Summary

Introduction

In most cases, when operating of ship power plants, the ships do not use clean fuel, but the fuel emulsion with the presence of the water component [1]. It is known that during combustion (chemical oxidation) of fuel due to the emergence of these intermediate chemical compounds like alcohols, small additions of water lead to the improvement of the quality of the combustion process [2]. In this case, increasing the dispersion of the torch and the concentration of harmful component (black carbon, toxic oxides of nitrogen and sulfur, etc.) can decrease in the flue gases, temperature of flue gases, etc. The relevance of the work in this direction is determined primarily by the need to improve the efficiency of vessel operation by the use of new technologies of preparation of water-fuel mixtures and their subsequent combustion in the main engine of the vessel

Analysis of scientific literature and the problem statement

Goal and objectives of the study

Findings

Conclusions