Optimization of the ventilation system for special ships

Volintiru, O. N.; Scurtu, Ionuţ Cristian; Stefănescu, T. M.

doi:10.1088/1742-6596/1122/1/012034

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…Many researches focused to improve the operating efficiency of cooling systems in the actual site climatic conditions [32,33], optimization of air conditioning systems [34,35] and to develop the methods of their rational designing [36,37].…”

Section: Literature Reviewmentioning

confidence: 99%

Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system

et al. 2022

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The fuel efficiency of gas engines is effected by the temperature of intake air at the suction of turbocharger. The data on dependence of fuel consumption and engine electric power on the intake air temperature were monitored for Jenbacher gas engine JMS 420 GS-N.LC to evaluate its influence. A waste heat of engine is rejected for heating water to the temperature of about 90??. The heat received is used in absorption lithium-bromide chiller to produce a cold in the form of chilled water. A cooling capacity of absorption chiller firstly is spent for technological needs and then for feeding the central air conditioner for cooling the ambient air incoming the engine room, from where the air is sucked by the engine turbocharger. The monitoring data revealed the reserves to enhance the efficiency of traditional cooling system of intake air by absorption chiller through deeper cooling. This concept can be realized in two ways: by addition cooling a chilled water from absorption chiller to about 5-7?? for feeding engine intake air cooler or by two-stage cooling with precooling ambient air by chilled water from ACh in the first stage and subsequent deep cooling air to the temperatures 7-10?? in the second stage of intake air cooler by using a refrigerant as a coolant. In both cases the ejector chiller could be applied as the most simple in design.

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Section: Literature Reviewmentioning

confidence: 99%

Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system

et al. 2022

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“…The exterior finishes degraded, these exhibiting cracks and partial falls of the plaster (Figure 4). [10,11] a) b)…”

Section: History Of the Study Objectivementioning

confidence: 99%

The indoor climate modelling and the economic analysis regarding the energetic rehabilitation of church

Țurcanu¹,

Verdeș²,

Ciocan³

et al. 2020

Technium

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The paper describes the behaviour of a heating system with radiators in a cult building. There has commonly used in many churches with many shortcomings. The temperature distribution in the analysed space is simulated in 2D. The simulation is based on an example, the Cathedral of the Assumption of the Virgin Mary in Jassy. The heating system with radiators simulated with the FLUENT program, the results being edifying for the factual state of the building. An important aspect is the impact of these heating systems on the works of art, the church being the 18th — century edifice. Current environmental issues lead to the continuous development of technologies used to reduce primary energy consumption. Churches are an invaluable wealth, sheltering heritage elements preserved in museums and historic buildings. Unheated churches have been used for centuries. Then, after installing one or more different heating systems, signs of rapid degradation appeared.

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“…practically in all waste heat recovery technics [8,9]. Different methods of modeling [10,11] and optimization [12] of such heat recovery technics are used.…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of heat recovery circuits of cogeneration plants with combustion of water-fuel emulsions

Kornienko

Radchenko

et al. 2021

THERM SCI

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When using modern highly efficient internal combustion engines with lowered potential of exhaust heat the heat recovery systems receive increasing attention. The efficiency of combustion exhaust heat recovery at the low potential level can be enhanced by deep cooling the combustion products below a dew point temperature, which is practically the only possibility for reducing the temperature of boiler exhaust gas, while ensuring the reliability, environmental friendliness and economy of power plant. The aim of research is to investigate the influence of multiplicity of circulation and temperature difference at the exit of exhaust gas boiler heating surfaces, which values are varying as 20, 15, 10?C, on exhaust gas boiler characteristics. The calculations were performed to compare the constructive and thermal characteristics of the various waste heat recovery circuits and exhaust gas boiler of ship power plant. Their results showed that due to application of condensing heating surfaces in exhaust gas boiler the total heat capacity and steam capacity of exhaust gas boiler increases. The increase of exhaust gas boiler heat capacity is proportional to the growth of its overall dimensions. A direct-flow design of the boiler provides a significant increase in heat efficiency and decrease in dimensions. In addition, a direct-flow boiler circuit does not need steam separator, circulation pump, the capital cost of which is about half (or even more) of heating surface cost.

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Optimization of the ventilation system for special ships

Cited by 6 publications

References 1 publication

Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system

Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system

The indoor climate modelling and the economic analysis regarding the energetic rehabilitation of church

Improving the efficiency of heat recovery circuits of cogeneration plants with combustion of water-fuel emulsions

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