Steel chimneys are utilized all over the world for quick work in industries and discharging flue gases into nature. Where utilized, nearby region is not influenced by chimney because height set high.This paper focuses on frequency analysis of steel 275m 120 m heights. Two models each considered, Model 1 tapered section with uniform thickness 2 diameter considered. Finite element method (FEM) us...

In recent years, energy consumption from electrical devices to foster air movement in regions with warm climates has risen, the resulting negative impact on environment. The purpose of this paper is evaluate performance a solar chimney used induce natural ventilation closed space, under weather conditions hot humid Mexican climate. For purpose, CFD simulations were run using RNG k- ɛ turbulence...

BACKGROUND The chimney graft (CG) technique was introduced to rescue accidentally covered aortic branches during aortic endovascular repair. It extends the sealing zone. There is concern about "gutter" type I endoleak (EL-I) and about the durability of CGs. The aim of the present report was to analyze the rapidly increasing existing data. METHODS A search was performed (PRISMA criteria) for a...

PURPOSE To present the 24-month radiological follow-up data for patients with pararenal aortic pathologies treated with chimney and periscope grafts during endovascular repair. METHODS Between January 2008 and December 2011, 124 high-risk patients with complex pararenal aortic pathologies were treated using the chimney technique at 2 European vascular and cardiovascular centers with advanced ...

BACKGROUND More than two-fifths of the world's population uses solid fuels, mostly biomass, for cooking. The resulting biomass smoke exposure is a major cause of chronic obstructive pulmonary disease (COPD) among women in developing countries. OBJECTIVE To assess whether lower woodsmoke exposure from use of a stove with a chimney, compared to open fires, is associated with lower markers of ai...

Abstract In this paper, a practical study was conducted with and without solar panels to show their effect on the performance of hybrid chimney in city Kirkuk Iraq. Six cells were placed between base collector glass cover, which gives freedom air move up down cells. Also, it is showed that speed higher when using PV until reaches 1.8 m/s while leaving energy coming out efficiency chimney. The r...

The active venting Sisters Peak (SP) chimney on the Mid-Atlantic Ridge holds the current temperature record for the hottest ever measured hydrothermal fluids (400°C, accompanied by sudden temperature bursts reaching 464°C). Given the unprecedented temperature regime, we investigated the biome of this chimney with a focus on special microbial adaptations for thermal tolerance. The SP metagenome ...

Hydrothermal vent systems harbor rich microbial communities ranging from aerobic mesophiles to anaerobic hyperthermophiles. Among these, members of the archaeal domain are prevalent in microbial communities in the most extreme environments, partly because of their temperature-resistant and robust membrane lipids. In this study, we use geochemical and molecular microbiological methods to investi...