Fire smoke decontamination equipment, such as fire-fighting robots and exhaust robots, is mainly used in long narrow spaces underground garages. In several recent decades, the study of fire spread equipment stimulated interests many researchers. However, present cannot eliminate insoluble toxic gases CO may decrease height layer, causing great difficulty to rescue. this study, a novel mobile pr...

Most of the energy was being lost through cooling system and exhaust gas, to utilize that convert it a useful job thermal barrier coatings is widely used. Tests were conducted on four stroke, single cylinder diesel engine for which its piston crown coated with thickness 100/100 microns YSZ/TiO2 over 100 NiCr bond coat plasma spray coating technology then results compared uncoated piston. Therma...

Engine injection strategy and renewable fuel both can improve nitrogen oxides (NOX) smoke/soot emissions in a common-rail compression ignition (CI) diesel engine. The effects of different postinjection (PI) timings (15, 30, 45) after top dead center (aTDC) pressures (550 650 bar) on pollutant were investigated for combustion (soybean biodiesel). results showed that the levels carbon monoxide (C...

In turbocharged engines with wastegate the exhaust pressure can change rapidly. A method to estimate the exhaust manifold pressure is presented for diagnosis of wastegate and turbocharger on spark-ignited engines. It does not require any extra sensors in the exhaust system after the calibration. A non-linear model is developed of the exhaust pressure. Estimates of the exhaust manifold pressure ...

Gasoline engine exhaust has been considered as a major source of air pollution in China. Due to lower cyto- and geno-toxicity effects of methanol engine exhaust, methanol is regarded as a potential substitute for gasoline. We have previously compared cyto- and geno-toxicities of gasoline engine exhaust with that of methanol engine exhaust in A549 cells (Zhang et al., 2007).To characterize the i...

A series of fire tests in a 1/15 scaled-model tunnel with one closed end have been conducted. Analysis was carried out to explore temperature distribution and smoke propagation under the influence ceiling extraction system. Five different heat release rates, three dimensions exhaust outlet, numerous rates were considered. Experimental results led some interesting findings about relationships be...

BACKGROUND Short telomeres are associated with chronic disease and early mortality. Recent studies in adults suggest an association between telomere length and exposure to particulate matter, and that ethnicity may modify the relationship. However associations in children are unknown. OBJECTIVES We examined associations between air pollution and telomere length in an ethnically diverse group ...

Background One of the requirements of the Osun State smoke-free legislation is to ensure smoke-free enclosed and partially enclosed workplaces. This survey was conducted to assess the knowledge and attitude of workers in indoor bars, beer parlors and discotheques to smoke-free legislation in general and the Osun State smoke-free law in particular.   Methods A convenience sampling of 36 hospital...

ABSTRACT Stringent NOx and particulate emission constraints require high levels of exhaust gas recirculation. In this paper we model and analyze a Variable Valve Timing methodology that in steady-state achieves large levels of internal Exhaust Gas Recirculation (iEGR) or residual charge in Compression Ignition Direct Injection (CIDI) engines. Current external Exhaust Gas Recirculation (eEGR) te...

In this research work, the effectiveness of stainless steel sheet for the production of motor cycle exhaust muffler burn protector was investigated. Energy Dispersive X-Ray fluorescence method was used to determine the chemical composition of the stainless steel materials and exhaust muffler of the motor cycle. The stainless steel sheet was perforated and folded to frustum shape to achieve aero...