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Article
Publication date: 19 November 2018

Lei Shao, Shiyu Feng, Chaoyue Li, Weihua Liu and Xuying Huang

This paper aims to improve the previous fuel scrubbing model and find out the relationship between bubble diameter and scrubbing efficiency (ƞ).

Abstract

Purpose

This paper aims to improve the previous fuel scrubbing model and find out the relationship between bubble diameter and scrubbing efficiency (ƞ).

Design/methodology/approach

A fuel tank scrubbing test bench was established to verify the accuracy of this model. Ullage and dissolved oxygen concentration were measured, and images of bubble size and distribution were collected and analyzed using image analysis software.

Findings

The bubble diameter has a great influence on ullage and dissolved oxygen concentration during the fuel scrubbing process. The scrubbing efficiency (ƞ) has an exponential relationship with bubble diameter and decreases rapidly as the bubble diameter increases.

Practical implications

The variation of the ullage and dissolved oxygen concentration predicted by this model is more accurate than that of the previous model. In addition, the study of bubble size can provide a guidance for the design of fuel scrubber.

Originality/value

This study not only improves the previous fuel scrubbing model but also develops a method to calculate scrubbing efficiency (ƞ) based on bubble diameter. In addition, a series of tests and analyses were conducted, including numerical calculation, experiment and image analysis.

Details

Aircraft Engineering and Aerospace Technology, vol. 91 no. 2
Type: Research Article
ISSN: 1748-8842

Keywords

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Book part
Publication date: 1 May 2009

Barrie Pittock and G. Dale Hess

Sustainable atmospheric management today involves a complex set of issues arising from the deliberate or inadvertent use of the atmosphere as a repository for waste…

Abstract

Sustainable atmospheric management today involves a complex set of issues arising from the deliberate or inadvertent use of the atmosphere as a repository for waste products arising from human activities. Urban pollution affects human health, building materials and vegetation. Acidic emissions and excess nutrients produce both acid rain and dry deposition that affect terrestrial, freshwater and ocean chemistry and ecosystems. The production and effects of atmospheric pollution can transcend national boundaries and thus mitigation will require cooperation on regional and global levels, as well as local action. Global pollution includes greenhouse gases and atmospheric particles which are changing the global climate and affecting human health. While technological solutions will play an important part, the large reductions in emissions necessary to achieve sustainability will involve adopting lifestyles that conserve energy and minimise pollution. These concerns were foreshadowed in the writings of Fritz Schumacher.

Details

Extending Schumacher's Concept of Total Accounting and Accountability into the 21st Century
Type: Book
ISBN: 978-1-84855-301-9

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Book part
Publication date: 22 December 2016

Marco Spitoni, Fabio Polonara and Alessia Arteconi

This chapter outlines the potential market of methane (especially LNG) as vehicle fuel in Europe and China.

Abstract

Purpose

This chapter outlines the potential market of methane (especially LNG) as vehicle fuel in Europe and China.

Methodology/approach

A comprehensive report on the existing framework in terms of market capacity, regulations, and incentives is presented. Moreover, the feasibility of using biogas as environmental friendly source gas is considered.

Findings

The transport sector represents a major element in the global balance of greenhouse gas (GHG) emissions. Natural gas is considered the alternative fuel that, in the short-medium term, can best substitute conventional fuels in order to reduce their environmental impact, because it is readily available at a competitive price, using technologies that are already in widespread use. It can be used as compressed gas (CNG) or in the liquid phase (LNG). The former is more suitable for light vehicles, while the latter for heavy-duty vehicles. Some barriers need to be overcome for the diffusion of this alternative fuel, especially concerning the supply problem. The incentive policy has been shown to cover a major influence in the feasibility evaluation.

Originality/value

This work shows the state of the art of natural gas as fuel, especially from biogas source, in Europe and China and assesses the incentive scheme necessary to make liquefied biomethane feasible on the basis of the existing scenario in Italy.

Details

China and Europe’s Partnership for a More Sustainable World
Type: Book
ISBN: 978-1-78635-331-3

Keywords

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Article
Publication date: 1 January 1995

N. Rajendran, K. Ravichandran and S. Rajeswari

Sulphur dioxide, a dangerous atmospheric pollutant, is a major concern with the increasing use of coal as a combustion fuel in thermal power plants. Numerous efforts were…

Abstract

Sulphur dioxide, a dangerous atmospheric pollutant, is a major concern with the increasing use of coal as a combustion fuel in thermal power plants. Numerous efforts were made through these years to minimize the emission of sulphur dioxide and one such effort is the desulphurization of the flue gas generated during combustion, commonly termed as flue gas desulphurization (FGD). However, the materials of construction used for FGD systems, usually of type 316L stainless steel were reported to be failed due to the localized corrosion attack by the aggressiveness of the environment, mainly of chloride, fluoride, acidity and temperature encountered during the scrubbing of SO2.

Details

Anti-Corrosion Methods and Materials, vol. 42 no. 1
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 March 1995

N. Rajendran and S. Rajeswari

The emission of SO2, a dangerous atmospheric pollutant, is the major problem with increasing the use of coal as fuel in various industries, particularly in thermal power…

Abstract

The emission of SO2, a dangerous atmospheric pollutant, is the major problem with increasing the use of coal as fuel in various industries, particularly in thermal power plants. A variety of methods for minimizing the SO2 emission have been reported in the literature, among which the desulphurization of the flue gas, generated by combustion of coal receives much attention and is termed as flue gas desulphurization (FGD). FGD scrubbers have found widespread use in thermal power plants, smelters, incinerators and various refining operations. The scrubber parts must resist corrosion from solution which have a varying degree of acidity and erosion, besides containing substantial concentrations of chlorides and SO2, and the unfavourable conditions of fluctuations in temperature. The currently‐used type 316L stainless steel material in many FGD installations, were reported to have failed, due to the localized corrosion attack by the aggressiveness of the environment encountered during scrubbing of SO2. Normally, the improvement in corrosion performance of the construction materials can be achieved by:

Details

Anti-Corrosion Methods and Materials, vol. 42 no. 3
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 February 1931

Major P.L. Teed

WHILE the general principles of gas‐fuel propulsion for airships have been enunciated in a former article, there remain to be considered both the gases available and the…

Abstract

WHILE the general principles of gas‐fuel propulsion for airships have been enunciated in a former article, there remain to be considered both the gases available and the means whereby they can be procured.

Details

Aircraft Engineering and Aerospace Technology, vol. 3 no. 2
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 October 1958

A piston‐and‐cylinder friction type vibration damper 16 is disposed between each pair of adjacent rotor blades 10 of a helicopter rotor. There is no damper provided at the…

Abstract

A piston‐and‐cylinder friction type vibration damper 16 is disposed between each pair of adjacent rotor blades 10 of a helicopter rotor. There is no damper provided at the drag hinge 14 between each blade 10 and the hub structure 13 of the rotor. The damper 16 comprises a scrubbing action with vibration damping and it provides constant damping for normal blade‐to‐blade oscillations and an increased degree of damping when abnormal oscillations take place. As shown in fig. 1, the damper provides resistance to compression movements only. Another damper is described which is double‐acting.

Details

Aircraft Engineering and Aerospace Technology, vol. 30 no. 10
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 February 1974

THE GENERAL ELECTRIC TF34‐GE‐2 turbofan engine was designed and developed specifically to fulfil the powerplant requirements of the S‐3A. Consequently, engine design…

Abstract

THE GENERAL ELECTRIC TF34‐GE‐2 turbofan engine was designed and developed specifically to fulfil the powerplant requirements of the S‐3A. Consequently, engine design considerations included both anti‐submarine warfare mission requirements and compatibility with a carrier‐based environment. To meet both, the engine features high thrust‐to‐weight, low fuel consumption over a wide power range, low noise and smoke, and corrosion resistant materials throughout.

Details

Aircraft Engineering and Aerospace Technology, vol. 46 no. 2
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 11 January 2016

S Thirumal valavan, P. Malliga, P. Arulraj and G. Udayakumar

Automobiles have always been a major cause of air pollution. The vehicular emission contains several harmful pollutants that affect the surroundings and living beings…

Abstract

Purpose

Automobiles have always been a major cause of air pollution. The vehicular emission contains several harmful pollutants that affect the surroundings and living beings. Mild CO exposure leads to headaches or unconsciousness. CO is also responsible for the global warming as well. CO is mainly generated in the IC engine due to incomplete combustion of the fuel. The purpose of this paper is to implement a CO absorption mechanism inside the exhaust pipe of vehicle.

Design/methodology/approach

In this research work the single cylinder four stroke spark-ignition engine is intended to run on petroleum and petroleum blended fuels. A new post-combustion emission control device called cobalt scrubber is employed to reduce the emission of CO during idling which absorb and later release it under transient conditions.

Findings

The emission of CO when the engine runs at petroleum is reduced from 6.24 to 3.02 per cent. Methanol 40 per cent+petrol 60 per cent gives a better emission result of 0.98 per cent of CO emission. So, the authors can implement the cobalt scrubber in automobiles to avoid CO emission during idling.

Practical implications

The scrubber clearly overcomes the drawbacks of the existing control techniques. The cobalt scrubber is a cheap, non-radioactive. It can be employed in any kind of vehicle irrespective of its engine.

Originality/value

The use of the scrubber design presented in this article, effectively reduces the emission of CO.

Details

Management of Environmental Quality: An International Journal, vol. 27 no. 1
Type: Research Article
ISSN: 1477-7835

Keywords

Content available
Article
Publication date: 1 August 2000

Abstract

Details

Disaster Prevention and Management: An International Journal, vol. 9 no. 3
Type: Research Article
ISSN: 0965-3562

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