Fuel consumption rates in resprouting eucalypt forest during hazard reduction burns, cultural burns and wildfires

2022 ◽  
Vol 505 ◽  
pp. 119894
Author(s):  
Owen H. Price ◽  
Rachael H. Nolan ◽  
Stephanie A. Samson
Keyword(s):  
Fuel Consumption ◽  
Hazard Reduction ◽  
Eucalypt Forest ◽  
Consumption Rates

Labor Productivity and Managerial Efficiency against a Static Technology: The Pennsylvania Iron Industry, 1750–1800

1980 ◽  
Vol 40 (1) ◽  
pp. 129-136 ◽  
Author(s):  
Paul F. Paskoff
Keyword(s):  
Eighteenth Century ◽  
Fuel Consumption ◽  
Labor Productivity ◽  
Learning By Doing ◽  
Iron Industry ◽  
Managerial Efficiency ◽  
Before And After ◽  
Consumption Rates ◽  
The Face

An increase in labor productivity and a reduction of fuel consumption rates were two notable and closely related achievements of the management of Hopewell Forge, an ironworks in eighteenth-century Pennsylvania. Significantly, these economies were realized in the face of technological stasis through learning by doing. The analysis of this accomplishment is cast in the larger context of the performance of the iron industry before and after 1800.

The Allison 570/571 Gas Turbine for Patrol Boat Power

1986 ◽  
Author(s):  
John E. Roberts
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Power Density ◽  
Design Features ◽  
Excellent Performance ◽  
Turbine Engine ◽  
Consumption Rates ◽  
Hull Forms ◽  
Main Components ◽  
Density Ratios

This paper discusses the use of 570/571-KF engine in patrol boat propulsion applications. The text is composed of two basic sections — 1. The Engine, and 2. The Applications: The engine section includes a brief review of the background and development of this free turbine engine, as well as a description of the main components and design features. The performance characteristics and fuel consumption rates are discussed relative to patrol missions. In the applications section a comparison is made of the current 570 installations (both civil and military), along with a survey of the planned applications. Finally a review of proposed uses of these engines in other naval vessels is included to show the adaptability of this size engine in FPB and PB missions, and demonstrate the feasibility of retrofitting other turbine or diesel powered patrol boats with 570/571-KF engines. The conclusion is drawn that for patrol boats with conventional or modified hull forms, the Allison 570/571 engines are well suited due to their excellent performance and power density ratios.

scholarly journals Analysis of driving behaviours of truck drivers using motorway tests

2020 ◽  
Vol 234 (13) ◽  
pp. 3103-3111 ◽  
Author(s):  
Jianbing Gao ◽  
Haibo Chen ◽  
Kaushali Dave ◽  
Junyan Chen ◽  
Ying Li ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Fossil Fuel ◽  
Dominant Role ◽  
Acceleration Process ◽  
Fuel Saving ◽  
Normal Distributions ◽  
The Road ◽  
Consumption Rates ◽  
Potential Benefits ◽  
On The Road

Road transportations still play a dominant role in goods delivery, and driving behaviours significantly affect the fuel economy of heavy-duty trucks. Plenty of fossil fuel is wasted as a result of unreasonable driving behaviours even in the case of highly experienced drivers. The objective of this paper is to analyse drivers’ behaviours over two segments of motorways and estimate the potential benefits of fuel saving caused by a change in driving habits during national and international goods delivery. Drivers’ habits on motorways change depending on the road situations. In the acceleration process, the fuel consumption rates are huge even under low-speed conditions. The truck fuel consumption rates are exaggerated by positive road slopes, but still dominated by acceleration. Accelerations are generally in normal distributions, with the median value being approximately 0.5 m/s2. The speed ranges corresponding to each gear enlarge with the increase in gear number. The potentials of annual fuel saving for parts of European Union countries are nearly 2 × 106 m3 by adopting proper driving behaviours.

Testing woody fuel consumption models for application in Australian southern eucalypt forest fires

2010 ◽  
Vol 260 (6) ◽  
pp. 948-964 ◽  
Author(s):  
J.J. Hollis ◽  
S. Matthews ◽  
R.D. Ottmar ◽  
S.J. Prichard ◽  
A. Slijepcevic ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Forest Fires ◽  
Eucalypt Forest

scholarly journals Engine performance of blends of palm kernel oil biodiesel under varying speed at constant torque

2020 ◽  
Vol 39 (3) ◽  
pp. 761-766
Author(s):  
J.N. Nwakaire ◽  
O.F. Obi ◽  
C.J. Ohagwu ◽  
C.C. Anyadike ◽  
I.E. Ugwu ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Palm Kernel ◽  
Engine Performance ◽  
Biofuel Production ◽  
Brake Thermal Efficiency ◽  
Kernel Oil ◽  
Constant Torque ◽  
Consumption Rates ◽  
Test Fuel

This study conducts a comparative evaluation the effect of using palm kernel oil (PKO), pure petroleum diesel and their blends (B5, B10, B20, B30, B40, and B100), on the performance of a four-cylinder CI diesel engine (David Brown 990: 58hp; 2WD), at Farm Power and Machinery Test laboratory Centre (FPMTLC), Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka. The objective of the study was to determine the fuel consumption rates, energy expended, brake specific fuel consumption, and brake thermal efficiency, under varying operating speeds (700 – 1900rpm) at constant torque. Each fuel test was conducted using the Heenan-Froude hydraulic dynamometer engine-test-bed; pure petroleum diesel (B0) was used to generate the baseline data. Variables calculated were analyzed, then compared with each other to determine the differences in the engine performance and also to determine the optimum test fuel. The results obtained show that B10 had the overall optimum energy output, fuel consumption rates, and brake specific fuel consumption of 5431.809J, 3.42E-07 m3/s, and 0.16569l/KWh, respectively at the highest engine speed of 1900. B10 had an excellent brake thermal efficiency of 60.6% but was not better than B100, which showed a higher value of 66.95%. From the analysis, B10 is the optimum test fuel and can be used as an alternative fuel in David Brown 990 (58hp; 2WD) or similar CI diesel engines without any engine modification, even though B100 showed potential as an alternative to fossil diesel. Biofuel production grows through integrated aquaculture and algae production; the algae oil will serve as a raw material for biofuel production Keywords: Blends, Biodiesel, Brake Specific Consumption, Diesel Engine, Fuel Consumption rate, Thermal Efficiency.

scholarly journals Comparative economic efficiency, operating costs and fuel consumption rates of freight transport modes between the largest industrial cities and seaports in South Africa

2013 ◽  
Vol 3 (3) ◽  
pp. 16-27
Author(s):  
Wessel Pienaar
Keyword(s):  
Fuel Consumption ◽  
Operating Cost ◽  
Freight Transport ◽  
Research Approach ◽  
Cost Structures ◽  
Industrial Cities ◽  
Transport Industry ◽  
Consumption Rates ◽  
Enhance Efficiency ◽  
The Cost

The paper deals with aspects of efficiency within the five modes of freight transport, with special reference to the operating cost and fuel consumption rates between South Africa’s largest industrial cities and seaports. In particular, the paper deals with (a) the opportunities that exist for the achievement of efficiency in freight transport; (b) the subgroups of economies that can enhance efficiency attainment in the freight transport industry; (c) prevailing cost structures, operating cost and fuel consumption rates within the five modes of freight transport; and (d) the salient economic features of the freight transport market. The research approach and methodology combine (a) a literature survey; (b) empiric research, (c) an analysis of the cost structures of freight transport operators from different modes of transport; and (d) interviews conducted with specialists in the freight transport industry.

The effect of woody fuel characteristics on fuel ignition and consumption: a case study from a eucalypt forest in south-west Western Australia

2018 ◽  
Vol 27 (5) ◽  
pp. 363 ◽  
Author(s):  
J. J. Hollis ◽  
W. L. McCaw ◽  
M. G. Cruz
Keyword(s):  
Fuel Consumption ◽  
Fire History ◽  
Management Practices ◽  
Woody Debris ◽  
Fuel Load ◽  
Fire Behaviour ◽  
Ecological Processes ◽  
Eucalypt Forest ◽  
Eucalypt Forests ◽  
Fuel Particles

Coarse woody debris (>0.6 cm in diameter) is an important component of the fuel complex in Australian eucalypt forests, influencing both fire behaviour, smoke production and post-fire ecological processes. We investigated how physical characteristics of woody fuel affected ignition and consumption during an experimental fire where the fuel complex characteristics, fire weather and fire behaviour varied within a narrow range. Decay status, bark condition, arrangement, suspension and extent of charring were classified for 2866 coarse woody fuel particles. We used generalised linear model (GLM) analysis to explain ignition success and the extent of consumption of individual particles, with a focus on larger diameter fuels (>7.5 cm in diameter), which comprised 83% of the woody fuel load and 94% of the woody fuel consumed during the flaming and smouldering stages of combustion. Ignition success was best explained by a model that included fuel arrangement (a surrogate of fuel proximity), suspension and decay status. The extent of fuel consumption was greater for pieces in advanced stages of decay, but suspension (inversely related) and arrangement (directly related) also affected the outcome. Forest management practices, previous fire history and other natural disturbances are likely to influence the distribution of pre-fire diameters and suspension classes that characterise large woody fuels at a site, and will therefore influence woody fuel consumption. This has practical implications for quantifying heat release and atmospheric emissions from fires burning in forests with different management histories.

scholarly journals Empirical Models for Power and Energy Requirements II : A Powered Implement Operation in Serdang Sandy Clay Loam, Malaysia

2017 ◽  
Vol 20 (3&4) ◽  
pp. 349-360
Author(s):  
A. F. Kheiralla ◽  
A. Yahya ◽  
M. Zohadie ◽  
W. Ishak
Keyword(s):  
Regression Analysis ◽  
Fuel Consumption ◽  
Specific Energy ◽  
Travel Speed ◽  
Energy Requirements ◽  
Clay Loam ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Consumption Rates ◽  
Power And Energy

Power and energy requirements were measured with an instrumented tractor for rotary tilling in Serdang sandy clay loam soil.  The effects of travel speed and rotor speed upon the measured data were investigated.  Power model from orthogonal regression analysis was formulated based on linear and quadratic functions of travel speed and bite length.  Fuel consumption model from regression analysis was formulated based on linear tractor PTO power as well as linear equivalent tractor PTO power.  Fuel consumption rates predicted by ASAE D497.3 were found to be 25% to 28% overestimates of the values predicted by the model developed.  However, fuel consumption rates reported by OECD Tractor Test were found to be 1% to 9% lower than the fuel consumption rates predicted by the model developed.  A comparison of power and energy requirements for both powered and draught implements showed that the disk harrow was the most energy efficient implement in terms of fuel consumption and specific energy followed by the rotary tiller, disk plough and mouldboard.  Finally, average PTO power, fuel consumption, wheel slip, wheel power and specific energy for a powered implement are presented.

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