نتایج جستجو برای: stack ventilation

تعداد نتایج: 65376  

2005
Y Ji

Buoyancy-driven displacement natural ventilation in a simple multi-storey building structure is investigated. The storeys are connected to a common atrium and top-down-chimneys, and the internal heat gains of the storeys are represented by localised point heat sources on each floor. The heat sources generate thermal plumes which entrain the surrounding air and transport warm air upwards. Simple...

Journal: :Energies 2022

Natural ventilation dominates in Polish residential buildings. It is a simple and low-cost system but its performance affected by varying environmental conditions. Hence, setting up constant airflow results errors when calculating heating cooling energy. In this paper, an attempt to integrate the buoyancy effect natural of building at hourly resolution with simulation method EN ISO 13790 obtain...

2016
Justin DeBlois Melissa Bilec Laura Schaefer

The roof solar chimney (RSC) is a low cost passive ventilation technique for reducing the energy consumption for cooling buildings. This study examines the performance and level of energy savings by simulating a detached home in four climates with RSC, cross-ventilation, and standard ventilation strategies. Each case was simulated in ESP-r for baseline and high efficiency construction, detached...

Journal: :Building and Environment 2022

The use of phase change materials for buildings cooling is among the most investigated techniques to improve their energy efficiency. This paper presents experimental investigations a dual-stack latent thermal storage system applications in buildings. consists two PCM stacks placed parallel. Two main design configurations are based on flow straightening components installed before stacks. overa...

ژورنال: انرژی ایران 2018

In this paper we study the performance of a PEM stack fuel cell after 900 hours of operation. We tried to identify any voltage degradation and its causes. Microscopic cracks on some parts of MEA mainly due to uniformity of pressure, stress concentration and elongation of membrane in the edge of GDL has been identified as the most important cause of this gradual degradation. High contact resista...

Electrochemical impedance spectroscopy (EIS) is a suitable and powerful diagnostic testing method for fuel cells (FCs) since it is non-destructive and provides useful information about FC performance and its components. In this study, for the first time, a 500W cascade type 4 cells stack with integrated humidifier, water separator and internal manifolds was designed, fabricated and tested. The ...

2009
William SEMPLE

Over the past several years many issues have come to light that have highlighted the need for improved ventilation in multi unit residential buildings (MURB's). High-rise buildings, for example, are all too often connected with poor indoor air quality. When looking at this issue from the perspective of urbanism and the trend to increasing the density of our urban centres, there is a dramatic ne...

Journal: :iranian journal of hydrogen and fuel cell 0
ebrahim alizadeh malek ashtar university of technology, fuel cell technology research laboratory majid khorshidian malek ashtar university of technology, fuel cell technology research laboratory seyed majid rahgoshay malek ashtar university of technology, fuel cell technology research laboratory seyed hossein masrori saadat malek ashtar university of technology, fuel cell technology research laboratory mazaher rahimi-esbo malek ashtar university of technology, fuel cell technology research laboratory

electrochemical impedance spectroscopy (eis) is a suitable and powerful diagnostic testing method for fuel cells (fcs) since it is non-destructive and provides useful information about fc performance and its components. in this study, for the first time, a 500w cascade type 4 cells stack with integrated humidifier, water separator and internal manifolds was designed, fabricated and tested. the ...

This paper presents an experimental and theoretical investigation of the causes of corrosion of stack in a cement plant. In this paper, information related to metallic stack failures are given in the form of a case study in Neka Cement Plant, Mazandaran, Iran. Heavy corrosion attacks were observed on the samples of stack. The failure can be caused by one or more modes such as overheating, stres...

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