Analysis of mechanical energy losses in marine diesels

Sagin, Sergii Victorovych; Madey, Volodymyr; Stoliaryk, Tymur

doi:10.15587/2706-5448.2021.239698

Cited by 19 publications

(18 citation statements)

References 15 publications

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“…2) [29]. This provided a reduction in energy consumption for their operation and increased the design coefficient of the vessel's energy efficiency [3,23].…”

Section: Research Resultsmentioning

confidence: 99%

“…The result of such alloying is the formation of a strong adsorption film on the rubbing surfaces and an increase in the anti-wear properties of the drilling slurry. The content of alloyed components in the total mass of the drilling slurry can be 10-15 %, and their specific gravity exceeds the specific gravity of the hydrocarbon base into which they are introduced [2,3]. The presence of the drilling slurry in a static state during its transportation from the shore to the oil platform leads to the gradual deposition of heavier reagents on the TECHNOLOGY AUDIT AND PRODUCTION RESERVES -№ 1/2(63), 2022…”

Section: Introductionmentioning

confidence: 99%

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Control and regulation of the density of technical fluids during their transportation by sea specialized vessels

Maryanov

2022

TAPR

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The object of research is the process of transporting drilling slurry through specialized marine vessels of the Platform Supply Vessels class. The subject of research is the sedimentation stability of the drilling slurry along the height of the cargo tank, which is proposed to be defined as a relative change in vertical density near the surface and bottom of the cargo tank. The studies were carried out on a specialized sea vessel with a displacement of 7320 tons. The design of the vessel provided for the reception and transportation of drilling slurry in four cargo tanks located on the port and starboard sides of the vessel. It has been experimentally established that during the 48-hour transportation, the density of the drilling slurry in the bottom part increases to 19.7 %; decrease in density on the surface – up to 7.8 %; decrease in the sedimentation resistance of the drilling slurry along the depth of the cargo tank – up to 29.85 %. A variant of modernization of the drilling slurry transportation system by installing additional circulation pumps providing forced circulation of the drilling slurry between cargo tanks is proposed. By using programmable microcontrollers (performing turning on/off the circulation pumps), it is possible to provide the following conditions for transporting the drilling fluid: an increase in the density of the drilling fluid in the bottom part up to 0.3 %; decrease in density on the surface – up to 0.25 %; decrease in the sedimentation resistance of the drilling slurry along the depth of the cargo tank – up to 8.01 %. It has been experimentally established that the creation of additional circulation and automatic support of the sedimentation resistance of the drilling fluid in the range of 2–7 % contributes to: – increasing the relative performance of cargo pumps from 38–55 % to 92–96 %; – reducing the time of pumping drilling slurry from cargo tanks to the drilling platform from 7.1 to 3.2 hours; – maintaining the technical condition of equipment, pipelines and elements of the drilling slurry transportation and pumping system.

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“…2) [29]. This provided a reduction in energy consumption for their operation and increased the design coefficient of the vessel's energy efficiency [3,23].…”

Section: Research Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control and regulation of the density of technical fluids during their transportation by sea specialized vessels

Maryanov

2022

TAPR

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“…. Let's note that under all modes and under any conditions of the experiment, the concentration of nitrogen oxides in exhaust gases did not exceed the value determined by expression (1). Thus, the operation of Hyundai Heavy Industries diesel engines 5H17/28 during the experiment was carried out in compliance with Annex VI MARPOL requirements [36].…”

Section: Research Resultsmentioning

confidence: 99%

“…On sea and river ships, steam turbine, gas turbine and diesel plants are used as heat engines. At the same time, diesel engines are installed on all ships without exception, regardless of their type, class and deadweight [1,2]. The effective power of diesel engines is used to propel the ship or provide electrical energy to ship equipment, mechanisms and systems.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the efficiency of biofuel use in the operation of marine diesel engines

Madey

2022

TAPR

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The object of research is the process of operation of marine diesel engines using biodiesel fuel. The subject of research is the process of experimental determination of the optimal concentration of biodiesel fuel in a mixture with fuel of petroleum origin. At the same time, a simultaneous maximum increase in environmental and minimum decrease in the economic parameters of the operation of a marine diesel engine should be ensured. The studies were carried out on Hyundai Heavy Industries 5H17/28 marine diesel engines. Three such diesel engines were part of the power plant of a specialized marine ship with deadweight of 9600 tons. The study was aimed at determining the concentration of biofuel in a mixture with diesel fuel, which provides the best environmental performance of a diesel engine. The fuel supply circuit to the first diesel did not change and the diesel was operated on RMB30 fuel. Two other diesel engines were operated on a fuel mixture – RMB30 fuel and B99.9 FAME biofuel. The content of biofuel in the mixture varied in the range of 5–20 %. The main quantities measured during the experiment were the concentration of nitrogen oxides and the volumetric content of carbon monoxide in the exhaust gases, as well as the specific effective fuel consumption. By switching groups of consumers, the operation of diesel engines was carried out at the same load, the support of which was required during the experiment. The load on diesel engines during the experiments varied in the range of 55–85 % of the nominal value. The operation of diesel engines in each of the studied modes was carried out for at least 1.5–2 hours, during which the main parameters were measured and the obtained values were averaged. It has been established that the use of biofuel increases the environmental friendliness of the marine diesel engine: – by 7.6–26.61 % (depending on the diesel loading and the content of biofuel in the fuel mixture), the emission of nitrogen oxides with exhaust gases is reduced; – by 3.8–23.6 % (depending on diesel loading and biofuel content in the fuel mixture) reduces the emission of carbon oxides with exhaust gases. It has been also determined that when using biofuel, there is an increase in the specific effective fuel consumption by 0.5–8.65 %, which reduces the efficiency of a diesel engine. The optimal composition of the fuel mixture containing biofuel is proposed to be determined experimentally for each diesel load, taking into account its environmental and economic indicators.

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“…The consequence of this is a decrease in the sedimentation stability of the drilling fluid and the formation in the bottom of the cargo tank of sediment from heavy components with which it is alloyed. This leads to increased resistance to cargo pumps (which pump the drilling fluid when it is unloaded from the PSV to the oil platform) and proportionally increases the energy loss to ensure the process of transporting the drilling fluid [9,10].…”

Section: Introductionmentioning

confidence: 99%

Reduced energy losses during transportation of drilling fluid by Platform Supply Vessels

Maryanov

2022

TAPR

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The object of research is the process of drilling fluid transportation by Platform Supply Vessels. The subject of research is the energy losses when pumping drilling fluid from a platform supply vessel to an oil platform. The research was carried out on a vessel with deadweight of 3840 tons. It has been experimentally established that for a drilling fluid with an initial density of 1272 kg/m3 for transportation within 6–48 hours, the following changes in rheological characteristics occur: – a layer with a density of 1235–962 kg/m3 is formed on the surface of the cargo tank; – a layer with a density of 1283–1422 kg/m3 is formed in the bottom part of the tank; – sedimentation resistance decreases by 3.89–47.82 %. A variant of modernization of the drilling fluid transportation system by installing additional circulation pumps providing forced circulation of the drilling fluid between cargo tanks is proposed. Additional circulation of the drilling fluid with an initial density of 1272 kg/m3 for transportation within 6–48 hours ensures that the rheological characteristics are maintained in the following range: – density on the surface of the cargo tank 1270–1232 kg/m3; – density in the bottom of the tank 1288–1338 kg/m3; – decrease in sedimentation resistance 1.42–7.92 %. Similar results were established for drilling fluid with an initial density of 1323 kg/m3 and 1188 kg/m3. To reduce energy losses, the process of unloading the fluid onto the oil platform is proposed to be performed at the completion of the technological process of unloading the vessel. At the same time, due to a decrease in draft and an increase in the height of the freeboard of the vessel, the static component of the pressure and hydraulic losses of the cargo pump decrease. A set of studies for drilling fluids with different initial density (1272 kg/m3, 1188 kg/m3, 1323 kg/m3) confirmed that when using additional X-shaped drilling fluid circulation: – relative performance of cargo pumps increases from 37–57 % to 88–96 %; – the time of pumping the drilling fluid from the vessel to the oil platform is reduced from 7.1–8.5 to 3.3–3.8 hours. The presented results confirm the expediency of using additional X-shaped circulation of the drilling fluid to reduce energy losses during transportation by Platform Supply Vessels.

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Analysis of mechanical energy losses in marine diesels

Cited by 19 publications

References 15 publications

Control and regulation of the density of technical fluids during their transportation by sea specialized vessels

Control and regulation of the density of technical fluids during their transportation by sea specialized vessels

Assessment of the efficiency of biofuel use in the operation of marine diesel engines

Reduced energy losses during transportation of drilling fluid by Platform Supply Vessels

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