Noise emissions in wood chipping yards: Options compared

Spinelli, Raffaele; Magagnotti, Natascia; Deboli, Roberto; Preti, Christian

doi:10.1016/j.scitotenv.2016.04.105

Cited by 6 publications

(7 citation statements)

References 19 publications

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“…Machine operators are particularly exposed to such harmful exhaust gases ) in conjunction with wood dust (Gulci et al 2018). Furthermore, using solution B reduces the rotational speed, which can reduce further impacts on operators such as noise (Spinelli et al 2016b) and vibration (Kończak et al 2020), thus improving their well-being (Kymäläinen et al 2021). However, stopping the internal combustion engine of many machines during idling is not acceptable, because in addition to its main function it provides energy for auxiliary systems such as maintaining comfort in the driver's cabin by providing power for accessories such as air conditioning, heating, TV, a refrigerator, and lighting (Rahman et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Effects of Changing Drive Control Method of Idling Wood Size Reduction Machines on Fuel Consumption and Exhaust Emissions

Warguła

Lijewski

Kukla

2022

Croat. j. for. eng. (Online)

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Operating conditions often fluctuate during processing of branches and sawmill offcuts using low-power wood size reduction machines (WSRMs), mainly due to changes in wood supply frequency. This results in relatively high proportions of idling time. Fuel consumption and associated exhaust emissions of WSRMs with combustion engines can be reduced by using innovative drive unit control systems during idling. The objective of the research was to determine the effects of two speed control systems on the fuel consumption and exhaust emissions of a WSRM with a two-cylinder cutting mechanisms driven by a small 9.5 kW spark ignition engine. Speed control system A (commercially available) had a substantially higher rotational speed than system B (an innovative, adaptive solution subject to patent application No. P433586). Pine (Pinus sylvestris L.) wood sawmill offcuts (average cross-sectional area, length and water content: 25×40 mm, 3000 mm and ca. 12, respectively) were used in system tests at a feed rate of ca. 5 pieces min-1. Material of this size is typically processed by such machines. Operating conditions were monitored by recording the rotational speed and torque. Emissions of harmful exhaust compounds–carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC), and nitrogen oxides (NOx) – were recorded using a portable emission measurement system. Fuel consumption values were also calculated from the data. The following effects were observed: application of innovative system B resulted in 33% lower fuel consumption, as well as 30%, 37% and 33% lower CO, CO2 and NOx emissions, respectively, than system A, but at the same time 290% higher HC emissions were registered. In operating conditions with higher proportions of idling time, solution B provides even higher reductions in fuel consumption and exhaust emissions.

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Section: Discussionmentioning

confidence: 99%

Effects of Changing Drive Control Method of Idling Wood Size Reduction Machines on Fuel Consumption and Exhaust Emissions

Warguła

Lijewski

Kukla

2022

Croat. j. for. eng. (Online)

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“…The cultured sample in this study, meanwhile, did not possess notable psychological resistance to the YW treatment facilities near home, while it had been initially anticipated that the surveyed participants may not welcome having YW treatment facilities such as the composting bins, chippers, wood shredders or grinders adjacent to their doorsteps, because of the associated negative and direct concerns such as noise, odor and other air pollution [28,45]. The result suggests that the sampled respondents, probably considering the naturalistic and bio-degradable natures of YW, did not have strong risk perception over YW recycling.…”

Section: Preference For Neighborhood-level Yard Waste Facilitiesmentioning

confidence: 96%

“…Apart from composting [8,20,21], different city governments are leaving no stones unturned in the exploration of new and other feasible strategies to divert YW burdens away from environmentally unfriendly landfilling options. These alternative strategies offer strategies to turn YW to energy or resources such as woodcraft or furniture, wood chipping, bio-drying for solid recovered fuel, gasification-derived biochar, incinerations, natural degradation, mulching and anaerobic digestions for biogas, among others [1,[22][23][24][25][26][27][28].…”

Section: Prior Research On Yard Waste Managementmentioning

confidence: 99%

Hong Kong Citizens’ Socio-Demographic Dynamics of Urban Yard Waste Facilities Siting and Legislation Preferences

Law

Lee²,

2022

Sustainability

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The public opinions on yard waste (YW) facility siting and legislation reflect public needs and anticipations on the ways they perceive and deal with such urban yard waste, which aid to ascertain why and how people participate in YW treatment activities and support future urban yard waste policy development. However, such relevant and specific social survey on above issues remains limited, thereby scant attention has been given to the related socio-demographic explorations. This study focuses on the YW facility siting and legislation public opinions, and relevant associations across socio-demographic groups in Hong Kong, China. Data were obtained from 202 mostly cultured respondents randomly gleaned by online questionnaire survey. More than half of respondents did not reject to having the YW treatment facilities in their neighborhood. The statistical association between the opposing opinion toward having YW treatment facility near home and education level was rather strong. The majority of the tertiary-educated group expressed the strongest counter-opposition view towards YW facility within the community, while those with secondary education background had no comment. Nearly 62% of respondents supported the outlawing of direct dumping of YW to landfill, and the majority of them were cultured citizens. Decision makers should prudently consider the expressed needs and hopes of the socio-demographically differentiated subpopulations, and factor in their public opinions into the decision-making process for progressing local urban yard waste governance and overall environmental sustainability.

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“…The chipper disc or drum rotating generally between 1000 and 2000 rpm is able to comminute the biomass in regular small wood pieces (woodchips) [16]. Through the expulsion mechanism the woodchips are discharged on the ground or into a bin or carrier (Figure 1).…”

Section: Manually Fed Wood-chippersmentioning

confidence: 99%

Innovative Solution for Reducing the Run-Down Time of the Chipper Disc Using a Brake Clamp Device

et al. 2017

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Wood-chippers are widely used machines in the forestry, urban and agricultural sectors. The use of these machines implies various risks for workers, primarily the risk of contact with moving and cutting parts. These machine parts have a high moment of inertia that can lead to entrainment with the cutting components. This risk is particularly high in the case of manually fed chippers. Following cases of injury with wood-chippers and the improvement of the technical standard (ComitéEuropéen de Normalisation-European Norm) EN 13525: 2005 + A2: 2009, this technical note presents the prototype of an innovative system to reduce risks related to the involved moving parts, based on the "brake caliper" system and electromagnetic clutch for the declutching of the power take-off (PTO). The prototype has demonstrated its potential for reducing the run-down time of the chipper disc (95%) and for reducing the worker's risk of entanglement and entrainment in the machine's feed mouth.

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Noise emissions in wood chipping yards: Options compared

Cited by 6 publications

References 19 publications

Effects of Changing Drive Control Method of Idling Wood Size Reduction Machines on Fuel Consumption and Exhaust Emissions

Effects of Changing Drive Control Method of Idling Wood Size Reduction Machines on Fuel Consumption and Exhaust Emissions

Hong Kong Citizens’ Socio-Demographic Dynamics of Urban Yard Waste Facilities Siting and Legislation Preferences

Innovative Solution for Reducing the Run-Down Time of the Chipper Disc Using a Brake Clamp Device

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