A new modelling procedure of the engine room ventilation system for work risk prevention and energy saving

Orosa, José A.; Costa, Ángel M.; Pérez, José Antonio

doi:10.1177/1475090216687148

Cited by 5 publications

(12 citation statements)

References 11 publications

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“…where T [ • C]-air temperature U [%]-relative humidity THI < 65-comfort state THI = 66-79-alert state THI = 80-100 discomfort state THI > 100 human body overheating leading to death In the case of engine rooms with high temperature and humidity, Orosa et al [18] highlighted that it is a good improvement for the comfort of the crew to have an intermediate room between the engine room and the control room or other room to reduce thermal shock after passing through the engine room. This intermediate room should be arranged at the concept stage of the project.…”

Section: The Main Aspects and Constrains Of Ventilation Systems Relat...mentioning

confidence: 99%

Improving the Ventilation of Machinery Spaces with Direct Adiabatic Cooling System

Mihai

Rusu

2022

Inventions

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Machinery spaces are provided with ventilation systems that ensure the necessary airflow for combustion and cooling. In some vessels, due to space constraints, the requested air flow for cooling cannot be achieved under extreme environmental conditions, and the engine load will need to be reduced. On the other hand, the outside air temperature can increase over 35 °C in some places, and the efficiency of the ventilation will be reduced. In these cases, other solutions for cooling the engine room should be analyzed. In this paper, the environmental conditions in the Romanian Danube area are analyzed to understand whether direct adiabatic cooling can be used to improve ventilation systems and what the challenges are after increasing the relative humidity inside the machinery spaces. Based on the data recorded, it was found that outside relative humidity substantially drops when the temperature increases, which ensures good conditions for the use of adiabatic cooling. This study demonstrates that by using direct adiabatic cooling, the air flow of the ventilation system can be reduced by more than 50%, which will reduce the pressure drop across the ventilation system, together with noise and energy consumption. After adiabatic cooling, the temperature and relative humidity inside the engine room will be fine for the functionality of the equipment, but the temperature–humidity index will be high, which means high discomfort for the crew. Therefore, it is concluded that this cooling solution should only be used in unattended machinery spaces.

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Section: The Main Aspects and Constrains Of Ventilation Systems Relat...mentioning

confidence: 99%

Improving the Ventilation of Machinery Spaces with Direct Adiabatic Cooling System

Mihai

Rusu

2022

Inventions

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“…Under certain evaporating temperature and compressor suction conditions, reducing the condensing temperature and pressure as much as possible is one of the most effective ways to save energy in the refrigeration system. Minimizing the heat transfer temperature difference between the high-temperature refrigerant vapor and the cooling water is the most effective measure to reduce the condensation pressure and temperature in the cold storage operation [7]. That is, the scale and dirt on the water side surface of the condenser should be removed regularly to reduce the heat transfer resistance; the non-condensable gas in the system should be removed, the excessive refrigerant in the system should be released, and the condensing pressure regulating valve should be in good working condition.…”

Section: Energy Saving In the Operation And Management Of Refrigeration Unitsmentioning

confidence: 99%

Research on Energy-Saving Technology of Ocean-Going Ship Electrical Equipment

Zhu

2020

E3S Web Conf.

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In recent years, my country’s high-tech technology has shown an unstoppable development trend, which has promoted the application of electrical equipment in the domestic shipbuilding industry. Energy conservation and environmental protection have gradually become the theme of the times. Ships need to pay attention to the application of energy-saving technology when applying electrical equipment to ensure that ships can play a practical role in green and environmental protection. This article focuses on the problem that the power consumption of marine auxiliary machinery greatly affects the endurance, and elaborates the energy-saving technology of marine auxiliary electrical equipment in detail, and analyses the energy-saving effect it can bring, and finally the application prospects of the marine auxiliary energy-saving technology the outlook was carried out.

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“…Notice that computational models determining the temperature distribution due to the operation of ship engines can be instrumental in vessel design for energy optimisation. 32 The goal is to find the temperature distribution within the system (water, air, ship). In particular, the main interest is the temperature of the water surrounding the ship, which is static but with its electric generators and consumers working.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Notice that computational models determining the temperature distribution due to the operation of ship engines can be instrumental in vessel design for energy optimisation. 32…”

Section: Numerical Simulationmentioning

confidence: 99%

Analysis of key variables for energy efficiency in warships

Carrasco¹,

Bendaña

Paredes

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part M:

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The purpose of this work is to investigate the effect of environmental variables on the electric energy expenditure of a typical surface warship. Studies with similar objectives are much more frequent for merchant ships, but warship operations have peculiarities that will be emphasised. In particular, they spend large fractions of their life cycle at port, during which the vessel remains active. First, a discussion of the embarked systems is presented, pointing out the importance of auxiliary systems and, in particular, heating, ventilation and air conditioning. Quantitative estimates of the energy consumption of those systems are provided. Then, using data taken during real operations of a frigate of the Spanish Navy, correlations are computed between power consumption and different environmental variables. As a novelty, the analysis is carried out separating the different modes of operation of the ship. This leads to interesting conclusions, including a considerable positive correlation between seawater temperature and fuel consumption when the vessel is in port. The effect of a moored ship on the surrounding seawater temperature is studied by a numerical computation. The results suggest that the position of sea chests may be consequential for energy efficiency.

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A new modelling procedure of the engine room ventilation system for work risk prevention and energy saving

Cited by 5 publications

References 11 publications

Improving the Ventilation of Machinery Spaces with Direct Adiabatic Cooling System

Improving the Ventilation of Machinery Spaces with Direct Adiabatic Cooling System

Research on Energy-Saving Technology of Ocean-Going Ship Electrical Equipment

Analysis of key variables for energy efficiency in warships

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