scholarly journals Development of wood as an alternative fuel for large power-generating systems. Part IV. A mathematical model of burning wood chips. Final report

1981 ◽  
Author(s):  
E. Giese ◽  
M. Leesley
Keyword(s):  
Mathematical Model ◽  
Alternative Fuel ◽  
Wood Chips ◽  
Final Report ◽  
Large Power

Design, Analysis, and Tests of Differential Planetary Gear System for Open Rotor Power Gearbox (Final Report)

2015 ◽  
Author(s):  
Kazuhiro Sato ◽  
Tatsuhiko Goi ◽  
Toshiaki Taguchi ◽  
Tooru Nishida ◽  
Hidenori Arisawa ◽  
...  
Keyword(s):  
High Reliability ◽  
Planetary Gear ◽  
Transmission Efficiency ◽  
Gear System ◽  
Final Report ◽  
Tooth Contact Analysis ◽  
Large Power ◽  
Open Rotor ◽  
Readiness Level ◽  
Planetary Gear System

The requirements for general aero-engines are becoming increasingly severe to achieve higher efficiency and lower emission. The Open Rotor Engine is one of the next-generation aero-engine concepts expected to satisfy these requirements. The Open Rotor Engine has a set of counter-rotating unducted fans to increase the propulsion efficiency. A 20,000 hp class differential planetary gear system is suitable for driving these counter-rotating fans. To realize a 20,000 hp class differential planetary gear system, there are some design challenges to be accomplished 1) large power (20,000 hp class), 2) sufficiently small and light to fit an engine (envelope), 3) high transmission efficiency over 99.5%, 4) precise misalignment control for gears and bearings, 5) high reliability (50,000 hour MTBF). At Kawasaki Heavy Industries, Ltd., development of the Open Rotor Power Gearbox started in 2007. The purpose of this development is to establish a design practice for the 20,000 hp class gear system and to demonstrate that its readiness level (TRL) is appropriate for whole-engine development. In this development, various state-of-the-art simulation technologies such as lube oil flow CFD, FEA, and tooth contact analysis were fully utilized to optimize the design. Details of the design, fabrication, and validation tests of a full-scale prototype up to 2012 were presented at the IDTC/CIE in 2013. This paper presents a summary of the previous activity and subsequent works and achievements as a final report.

Mathematical model of steam drying of wood chips and other hygroscopic porous media

AIChE Journal ◽  
1996 ◽  
Vol 42 (9) ◽  
pp. 2491-2502 ◽  
Author(s):  
Christian Fyhr ◽  
Anders Rasmuson
Keyword(s):  
Mathematical Model ◽  
Porous Media ◽  
Wood Chips ◽  
Steam Drying

scholarly journals Mathematical Model for Alternative Fuel Combustion in a Rotary Cement Kiln Burner

2014 ◽  
Vol 4 (1) ◽  
pp. 56-61 ◽  
Author(s):  
W. K. Hiromi Ariyaratne ◽  
E. V. P. J. Manjula ◽  
Morten C. Melaaen ◽  
Lars-André Tokheim
Keyword(s):  
Mathematical Model ◽  
Alternative Fuel ◽  
Fuel Combustion ◽  
Cement Kiln ◽  
Rotary Cement Kiln

scholarly journals Defining the Mathematical Dependencies of NOx and CO Emission Generation after Biomass Combustion in Low-Power Boiler

2019 ◽  
Vol 29 (3) ◽  
pp. 153-163 ◽  
Author(s):  
Ladislav Lukáč ◽  
Ján Kizek ◽  
Gustáv Jablonský ◽  
Yevgeniy Karakash
Keyword(s):  
Mathematical Model ◽  
Regression Analysis ◽  
Low Power ◽  
Measured Data ◽  
Wood Chips ◽  
Biomass Combustion ◽  
Regression Equations ◽  
The Mathematical Model ◽  
Power Boiler ◽  
Co Emission

Abstract The paper deals with the study of the influence of various factors, which have an impact on emissions such as NOx, CO, which have been verified by measurements. Biomass in the form of wood chips as fuel of different moisture content from 9% to 25% has been tested at various boiler outputs. The presented work also defines the mathematical dependencies of NOx and CO emission generation by using regression analysis from measured data after biomass combustion in low-power boilers. The paper also describes a mathematical model of biomass combustion. The mathematical model was created to verify the measured data and prediction of emission generation in the process of biomass combustion. This model consists of combustion of stoichiometry, calculation of combustion temperatures, obtained regression equations of NOx and CO. At the end of this paper, the obtained results are compared with the calculated models as well as the results of the defined dependencies from the regression analysis.

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