The objectives in this thesis are to present a model of a variable venturi in an exhaust gas recirculation (EGR) system located in a heavy duty diesel engine. A new legislation called EURO 4 will come into force in 2005 which affects truck development and it will require an On-Board Diagnostic system in the truck. If model based diagnostic systems are to be used, one of the advantages is that t...

The objectives in this thesis are to present a model of a variable venturi in an exhaust gas recirculation (EGR) system located in a heavy duty diesel engine. A new legislation called EURO 4 will come into force in 2005 which affects truck development and it will require an On-Board Diagnostic system in the truck. If model based diagnostic systems are to be used, one of the advantages is that t...

INTRODUCTION In immunocompromised patients, acute respiratory failure (ARF) is associated with high mortality, particularly when invasive mechanical ventilation (IMV) is required. In patients with severe hypoxemia, high-flow nasal oxygen (HFNO) therapy has been used as an alternative to delivery of oxygen via a Venturi mask. Our objective in the present study was to compare HFNO and Venturi mas...

Scrubber systems abate the sulphur oxide emissions of engines when cheap fuel oils that are high in content employed as combustibles. However, ships with these voluminous devices installed on board is space demanding. This work analyses feasibility incorporating acoustic abatement exhaust gas noise functionality into scrubber design to provide a combined scrubber–silencer system. For this purpo...

This paper presents comments and recommenda­ tions regarding conceptual design specifications for dry scrubbers (also known as wet/dry scrubbers) for use on waste-to-energy facilities. These recommendations would be used to develop minimum acceptable design parameters for requests for proposals for full-service or turnkey waste-to-energy contractors. The reason for presenting these comments and...

The performance of particulate-laden SO(2) scrubbing in a modified tapered bubble column with internals is reported in this article. The presence of particles improved the particulate-laden SO(2) removal efficiency to about 15% that was elucidated by the facilitated adsorptive mass transport. Experimentation revealed that nearly 100% removal efficiency of particulate-laden SO(2) was achievable ...

Biological treatment is a promising alternative to conventional air-pollution control methods, but thus far biotreatment processes for odor control have always required much larger reactor volumes than chemical scrubbers. We converted an existing full-scale chemical scrubber to a biological trickling filter and showed that effective treatment of hydrogen sulfide (H2S) in the converted scrubber ...

Wet scrubbers are mainly used to remove undesirable gaseous components from flue gases. Normally most scrubbers have low removal efficiency for fine particles. One way to increase the fine particle removal efficiency is to use pre-charging. Particles can be charged by corona discharge like in an electrostatic precipitator. Charged fine particles are removed by the combined effect of i. Inertial...