Thermal imaging inspection for building applications it is powerful and non invasive method for monitoring and diagnosing the condition of buildings. With a thermal imaging camera you can identify ...problems early. This method allows us to check and correct issues before becoming more serious and more costly. By this method, we can exemplify the heat loss through the surface of the building. Thermal imaging consists of scanning the building with infrared, using a special camera. The radiated heat leads to a temperature variation on the surface of the building element in which is embedded. This method, corroborated with the calculation of heat loss, provides a technical and economical solution for the problem of thermal discomfort in the building.
The industry of shipbuilding is a segment that faces many problems caused by flexible environment. We will try to determine the stresses and strain caused by an underwater explosion, which acts on a ...ship's hull. The numerical simulation for ship plate is done with commercial software ANSYS using water pressure from other measured sources.
Review of wave energy harvesters Poenaru, V.; Scurtu, I.C.; Dumitrache, C. L. ...
Journal of physics. Conference series,
09/2019, Volume:
1297, Issue:
1
Journal Article
Peer reviewed
Open access
Nowadays modern technologies are harvesting wave energy in various and ingenious ways using latest techniques and technologies. Wave, tides and currents form a natural part of abundantly available ...energy which can be harnessed as a substitute for oil & coal to meet our energy demands. This paper will present actual harvesters and practices to obtain energy from sea.
For chilled water marine systems, calculation and operating parameters are specified in the standards. In the preliminary and design phase, other norms should be considered to increase crew comfort ...on board, optimize operating conditions for engines, auxiliary systems and other subassemblies. The efficiency of air conditioning and ventilation operation depends on the processes taking place in the compartments as well as the external weather conditions.
The main objective of this paper is a five operating mode comparison case study that reveals the values of the main three force components acting in the contact point where two gears are meshed ...together. For the determination of this force components, the initial part of the paper will consist in the calculation of the moment of torsion for the output pinion of the gearbox, with the help of the total power of the power turbine that drives the main shaft. This will also conclude that of the total power generated by the 18802,242 kW turbine power plant, the power turbine that drives the main shaft through the main gearbox will return the power of 5000 kW.
Manufacturing steps for a modern three - column semi-submersible structure are delivered using CFD CAE software and actual Froude scaled model testing. The three- column offshore is part of the Wind ...Float Project already realized as prototype for wind energy extraction in water depths more than 40 meters, and the actual model will not consider the wind turbine. The model will have heave plates for a smaller heave motion in order to compare it with the case without heave plates. The heave plates will be part of the Froude scale model.. Using a smaller model will determine a smaller heave motion and this will affect predictions of the vertical movement of the three- column offshore structure in real sea. The Froude criterion is used for the time, speed and acceleration scale. The scale model is manufactured from steel and fiberglass and all parts are subjected to software analysis in order to get the smallest stress in connections inside the model. The model mass was restricted by scale dimensions and also the vertical position of centre gravity will be considered during the manufacturing and design process of the Froude scale offshore structure. All conditions must converge in model manufacturing and design in order to get the best results to compare with real sea states and heave motion data.
Due to the complexity of operation and the purpose of the gearboxes, they must ensure lubrication and proper cooling of the gears in motion to prevent jamming and premature wear. For gear ...lubrication, grease and mineral oils are the most commonly used. The lubricant must be chosen in such a way that it does not degrade the gears, seals or bearings and has great stability in operation. The main purpose of this paper is to show the benefits of choosing a correct type of lubricant.
There is a risk that machines and essential systems onboard ship fail during ventilation failure. For combustion air supplied inside the machinery space, a sufficient air flow rate must be provided ...to maintain combustion in the event of a malfunction of the ventilation system. Ventilation of all machinery spaces should be sufficient under normal conditions to prevent the accumulation of oil vapor. Fans of the machinery spaces shall be provided with appropriate fire and smoke control devices which shall operate automatically when the inert gas fire extinguishing system is activated.
The sizing of the air conditioning chilled water plant components shall be carried out considering both the summer and winter operating modes. Some devices are used in both modes, and others only in ...one of two working loads. Depending on the sources of harmful substances from the air conditioning spaces served, can be selected one of the following air recirculation systems: no recirculation (complete replacement with fresh air); partial recirculation (partial replacement of vicious air with fresh air); total recirculation (no fresh air injection).
A modern passenger multirole boat (MPMB) is designed to serve specific requirements and missions but when it comes to pleasure crafts it has to dispose certain functional characteristics with a ...specific hull weight distribution, while having certain stability along with aesthetic appeal and stream lined hull. In recent years, there has been greater focus towards issues related to diversity of MPMB leading to development of newer designs and improved stability. The performance of these MPMB comprises of two distinct phases: the design analysis and the identification of the materials used for boat construction. Maximum value MPMB Righting Arm is 1.34 m was determined for 21.76 degrees. This paper will present the design analysis and stability characteristics for modern passenger multirole boat with a calculated stability for passenger use.
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