Qatar University Institutional Repository: Recent submissions
Now showing items 361-380 of 29650
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Improving the performance of a commercial absorption cooling system by using ejector: A theoretical study
( Elsevier , 2023 , Article)Absorption cooling systems (ACS) have lower coefficients of performance (COP) compared to direct expansion (DX) cooling systems. Nevertheless, ACS offers a green alternative to typical DX systems. In this study, a numerical ... -
Comparison of different mechanical ventilation systems for dairy cow barns: CFD simulations and field measurements
( Elsevier , 2021 , Article)Proper ventilation in dairy cow barns in terms of volume flow rate and air velocity is important to avoid heat stress, which leads to reduced milk production and respiratory disease. In this study, three different ventilation ... -
Simulation of spectators' aerodynamic drag using porous models approximation
( Elsevier , 2020 , Article)Evaluation of the thermal comfort is essential for complex ventilation systems design. Assessment of thermal indices requires representative velocity and pressure fields' values. When simulating the air flow in large ... -
Performance comparison of different flow arrangements of 4-fluid internally-cooled liquid desiccant dehumidifiers
( Springer Science and Business Media B.V. , 2022 , Article)In this study, the performance of 10 different flow arrangements of 4-fluid internally-cooled liquid desiccant dehumidifiers were compared. The four fluids are supply air, exhaust air, liquid desiccant, and water. The ... -
Numerical simulation of blowing ratio effects on film cooling on a gas turbine blade
( WIT Press , 2011 , Conference)This article investigates the film cooling effectiveness and heat transfer in three regimes for a film-cooled gas turbine blade at the leading edge of the blade with 450 angle of injection. A Rolls Royce blade has been ... -
CFD analysis of a heat transfer device integrated wind tower system for hot and dry climate
( Elsevier , 2013 , Article)Increasing emphasis on reducing power consumption has raised public awareness of natural and renewable energy resources, particularly the integration of natural ventilation systems in buildings such as wind towers. The aim ... -
The development of commercial wind towers for natural ventilation: A review
( Elsevier , 2012 , Article Review)Wind towers have been in existence in various forms for centuries as a non mechanical means of providing indoor ventilation, energy prices and climate change agendas have refocused engineers and researchers on the low ... -
Pharmaceutical characterization of myonovin, a novel skeletal muscle regenerator: In silico, in vitro and in vivo studies
( Canadian Society for Pharmaceutical Sciences , 2018 , Article)PURPOSE: MyoNovin is a novel skeletal muscle-regenerating compound developed through synthesis of two nitro groups onto a guaifenesin backbone to deliver nitric oxide to skeletal muscle with a potential to treat muscle ... -
Free vibration analysis of linear particle chain impact damper
( Elsevier , 2013 , Article)Impact dampers have gained much research interest over the past decades that resulted in several analytical and experimental studies being conducted in that area. The main emphasis of such research was on developing and ... -
A review of heat pipe systems for heat recovery and renewable energy applications
( Elsevier , 2012 , Article Review)Advancements into the computational studies have increased the development of heat pipe arrangements, displaying multiphase flow regimes and highlighting the broad scope of the respective technology for utilization in ... -
A numerical investigation into the feasibility of integrating green building technologies into row houses in the Middle East
( Taylor and Francis Inc. , 2013 , Article)Atraditional rowhouse was re-designed to be adapted to the hot and arid climate of the Middle East. The vernacular design features include a number of cooling devices such as an open courtyard, wind towers and heat-storing ... -
A review of sustainable cooling technologies in buildings
( Elsevier , 2011 , Article Review)Heating, ventilating and air-conditioning (HVAC) systems play a vital part in ensuring the required comfort levels of residents inside building environments. However, most modern cooling equipments consume high levels of ... -
Comparison between evaporative cooling and a heat pipe assisted thermal loop for a commercial wind tower in hot and dry climatic conditions
( Elsevier , 2013 , Article)Increasing focus on reducing energy consumption has raised public awareness of renewable energy resources, particularly the integration of natural ventilation devices in buildings such as wind towers. The purpose of this ... -
Genotoxic impact of long-term cigarette and waterpipe smoking on DNA damage and oxidative stress in healthy subjects
( Taylor and Francis Ltd , 2019 , Article)Although a plethora of studies have examined tobacco smoke-cancer disease association, the involvement of cellular genetic toxicity remains unclear. Therefore, the present study provides molecular evidence for a pathway ... -
Unlocking the secrets: exploring the influence of the aryl hydrocarbon receptor and microbiome on cancer development
( BioMed Central Ltd , 2024 , Article Review)Gut microbiota regulates various aspects of human physiology by producing metabolites, metabolizing enzymes, and toxins. Many studies have linked microbiota with human health and altered microbiome configurations with the ... -
Integration and application of passive cooling within a wind tower
( American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) , 2014 , Conference)Increasing emphasis on reducing power consumption has raised public awareness of natural and renewable energy resources, particularly the integration of passive cooling systems in buildings such as wind towers. Wind towers ... -
Numerical investigation of the integration of heat transfer devices into wind towers
( Italian Association of Chemical Engineering - AIDIC , 2013 , Conference)The purpose of this study is to incorporate heat transfer devices inside the passive terminal of a wind tower unit, highlighting the potential to achieve minimal restriction in the external air flow stream while ensuring ... -
Cannabidiol Suppresses Cytokine Storm and Protects Against Cardiac and Renal Injury Associated with Sepsis
( Mary Ann Liebert Inc. , 2024 , Article)Background: Cytokine release syndrome, also termed "cytokine storm," is the leading cause of morbidity and mortality among patients with various conditions such as sepsis. While cytokine storm is associated with multiple ... -
5-, 12- and 15-Hydroxyeicosatetraenoic acids induce cellular hypertrophy in the human ventricular cardiomyocyte, RL-14 cell line, through MAPK- and NF-κB-dependent mechanism
( Springer Verlag , 2016 , Article)Recent studies have established the role of mid-chain hydroxyeicosatetraenoic acids (HETEs) in the development of cardiovascular disease. Mid-chain HETEs have been reported to have vasoconstrictive and pro-inflammatory ... -
Investigating the effect of utilizing new induction manifold designs on the combustion characteristics and emissions of a direct injection diesel engine
( American Society of Mechanical Engineers (ASME) , 2018 , Article)New induction manifold designs have been developed in this work to enhance the turbulence intensity and improve the mixing quality inside diesel engine cylinders. These new designs employ a spiral-helical shape with three ...
