Acoustic Enclosure Optimization for a Higher Capacity Diesel Generator Set Using Statistical Energy Analysis (SEA) Based Approach

Yadav, P. S.; Bankar, Harshal; Karanth, Nagesh Voderahobli

doi:10.4271/2017-26-0188

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Then, the behavior of heat transfer coefficient (h), at daytime for case with empty gap enclosure is lower than outside the enclosure case because heat transfer coefficient dependent on (Th-Ts) as illustrate at Figure (9) and Figure (10). While Nusselt number at daytime and nighttime follow the same behavior of heat transfer coefficient because it depends on heat transfer coefficient behavior as shown in Figure (11) and Figure (12).…”

Section: 1temperature Variationmentioning

confidence: 82%

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An experimental study of noise reduction of portable generator using local made acoustic enclosure

Kareem,

J. Jubear,

R. Al-Bugharbee

2023

ejuow

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Portable generators are now widely used in shops, offices, and homes to provide electrical power during power outages in Iraq. However, these generators produce a lot of noise emitted from rotating mechanical parts and fuel combustion inside engine chamber. This noise has a negative impact on the neuroendocrine, cardiovascular, respiratory, and digestive systems. The reduction of generator noise still attracts the interest of many researchers. In this work, the reduction of generator noise under the use of an acoustic enclosure, made from local materials, is investigated experimentally. Experimental work is conducted using a 2kW generator and compares the sound intensity for two cases: a generator without enclosure and one with enclosure. The enclosure is made from plywood, galvanized sheet, glass wool, cork, and a compressed sponge. The results include the measurement of sound intensity at day and night, at zero to full load, and at two different distances. The findings depicted that generator noise reduction reaches 10.3 dB at night and 9.6 dB during the day. In addition, the engine temperature, in case of using the enclosure, is kept within the allowable range of air-cooled generators which is 300 °C. The maximum temperature at 100% load measured inside the enclosure was 77.86 °C during the night time and 91.75 °C at day time.

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Section: 1temperature Variationmentioning

confidence: 82%

“…In this paper presented in the reference [11] , a rectangle sheet metal enclosure with a volume of 18.7m 3 was used, with two doors, one of which was made of glass and inner walls lined with rock wool. The section resulted in a reduction of transmitted noise by 3 dB.…”

mentioning

confidence: 99%

An experimental study of noise reduction of portable generator using local made acoustic enclosure

Kareem,

J. Jubear,

R. Al-Bugharbee

2023

ejuow

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“…The OFAT method [23] is used to calculate the sensitivity of the above four parameters. The louver with the parameter below, negative orientation, 15mm spacing, an inclination angle of 45 • , and a coincidence ratio of η = 0 , is set as a reference pattern (case 1) referring by related literature [13,14]. And the design parameter distribution is as shown in Table2.…”

Section: Sensitivity Analysis Of Insertion Loss For Louver Parametersmentioning

confidence: 99%

“…Kosutova [17],Yang and others [18] have confirmed that for the louvers with inclination angles of 0, 30 and 45 degrees, the heat transfer efficiency difference is less than 8% and the pressure loss coefficient has little change under the same speed boundary. However, louvers are mostly based on simple applications in mechanical engineering: Yadav [13] and Mole [14] reduce the noise radiation of gasoline engine generators in the plant by introducing acoustic packaging of louvers. Only Martinus and others [15] studied the effect of louver angle on performance.…”

Section: Introductionmentioning

confidence: 99%

The Sensitivity Research on Design Parameters of Excavator Engine Cabin Louvers

yang,

Gao,

Shi

et al. 2023

Preprint

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Aiming at the noise reduction problem of fixed platform mass production excavators, the application method of acoustic packaging louvers is proposed. Under the premise of economy, louvers’ application is an important means of acoustic packaging, which can effectively reduce noise through reasonable design and installation. Based on the applicability of boundary element under pressure boundary conditions, the insertion loss sensitivities are obtained by OFAT method for four parameters of louvers’ fin, which are orientation, spacing, coincidence rate and inclination angle. Thereby the impacts of these four parameters on the acoustic packaging performance are quantified. The insertion loss evaluation method based on acoustic power measurement is proposed, which is more reliable than the traditional single-point sound pressure measurement. Sensitivity analysis of insertion loss confirms that there is a critical level of fin spacing, coincidence rate, and inclination angle, and that crossing the critical value can degrade or even weaken the marginal utility of acoustic packaging.

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