检索结果-南通市图书馆

Numerical Study of Mixed Convection in a Photovoltaic Trombe Wall Channel Coupled with a Solar Chimney Integrated into a Building for Habitats Passive Cooling

引用

Open Journal of Applied Sciences 2020年第12期10卷 844-863页

作者： yawovi nougbléga Koffi Sagna Hodo-Abalo Samah Kodjo Kpode Laboratoire Sur l’Energie Solaire /Groupe Phénomène de Transfert et Energétique Université de Lomé Lomé Togo Laboratoire Sur l’Energie Solaire/Chaire UNESCO sur les Energies Renouvelables Université de Lomé Lomé Togo Département de Physique Université de Kara Kara Togo

The solar chimney can generate airflow through the living space of the building to provide cooling. Hence, solar energy represents the best renewable, environmentally friendly source of energy that can be used for heating and cooling of houses. The present paper reports the numerical study of the performance of the mixed convection in the associated hybrid Photovoltaic/Thermal chimneys integrated into building for natural habitat ventilation. The front side glass plate of the chimneys is heated by a non-uniform daily solar radiation flux. Air is considered to be the cooling fluid. The stream fucntion-vorticity formulation with a finite difference numerical discretization solution scheme has been adopted. The system of algebraic governing equations is solved by Thomas algorithm method. The aim of the present paper is to study and to predict the dynamic fields and particularly of the mass flow rate of the air thermosiphon drawing in the associated hybrid Photovoltaic-Thermal chimneys integrated into a building for passive cooling in the habitats. The effects of the governing parameters, namely Reynolds number (30 ≤ Re ≤ 200), Rayleigh number (103 ≤ Ra≤ 105), the integrated chimney width on the fluid flow and the heat transfer characteristics, are studied in detail. The local Nusselt number, streamlines, isotherms, PV cells electrical efficiency and the outlet velocity at the top of the channels are the results represented versus the above controlling parameters.

关键词： Trombe Wall Passive Cooling Associated Chimneys Electrical Efficiency Thermal Comfort

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numerical Analysis of the Transient Process of Flow and Heat Transfer at High Rayleigh Number in a Partially Open Habitat Heated from Above

引用

Open Journal of Fluid Dynamics 2019年第3期9卷 253-267页

作者： Kodjo Kpode yawovi nougbléga Cheikh Mbow Magolmèèna Banna Département de physique Université de Kara Kara Togo Groupe Phénomène de Transfert et Energétique Université de Lomé Lomé Togo Département de physique Université Cheikh Anta Diop Dakar Sénégal

In this work, we studied the thermoconvective instabilities in a pentagonal cavity containing a Newtonian fluid. The cavity provided with a side opening is uniformly heated from above by a constant heat flux. The natural ventilation phenomenon in the classic habitat of the hot climate is thus numerically analyzed with unsteady natural convection equations formulated with vorticity and stream-function variables. The finite volume predictions of two-dimensional laminar natural convection at high Rayleigh number are presented. Results show that the incoming fresh air and the hot air discharge begin with the late start of the convection. The phenomenon intensifies with time and the birth of instabilities improves the homogenisation of temperatures which imply the elimination of very cold and very hot areas. However, the competition between the incoming fresh air and the hot air expansion leads to a perpetual displacement of the thermal front. The cross-sections at the opening of the incoming fresh and outgoing hot air are time-varying and the penetration depth of the fresh air is highlighted by the large convective cells originated from the aperture. The non monotonic variation of the Nusselt number reflects not only the multicell nature of the flow but also expresses the heat lost by the active walls due to the fresh air.

关键词： Unsteady Natural Convection Natural Ventilation Multicell Flow Nusselt Number

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Leachate Recirculation on Landfill Degradation and Biogas Production

引用

Energy and Power Engineering 2023年第1期15卷 37-51页

作者： Kokou N’wuitcha Komlan Déla Donald Aoukou yawovi nougbléga Magolmèèna Banna Xavier Chesneau Department of Physics Solar Energy Laboratory University of Lome Lome Togo Department of Physics Laboratory of Mathematics and Physics University of Perpignan Perpignan France

Population growth combined with the rising standard of living of people around the world is the reason for the ever-increasing production of waste which management is costing states a lot of money for its disposal. Among available waste treatment techniques, landfill is one of the most promoted waste management techniques with the emergence of the bioreactor concept. However, the control of biodegradation parameters in order to accelerate waste stabilization is an important issue. For environmental and economic reasons, the technique of leachate recirculation by injection into the waste is increasingly used to improve the degradation of landfilled waste. The injection of leachate is possible using vertical boreholes, horizontal pipes, infiltration ponds or a combination of these. Indeed, moisture is the main factor in waste degradation and biogas production. The migration of leachate to the bottom of the landfill creates low moisture in the upper areas of the landfill reducing the growth of microbial populations. This results in low or no biogas production. The main objective of the present work is to develop a numerical model of leachate recirculation by injection into the waste to rewet the waste and restart biological activity. The analysis of the results shows that the diffusion of the wet front increases with time and depth. The lateral widening of the wet front is slow in relation to the progression of the wet front towards the bottom of the waste cell. This indicates the predominance of gravity effects over diffusion phenomena. The results reveal that the distributed re-injection is the best mode of leachate recirculation because the moisture distribution on the whole waste mass is totally satisfactory and the biogas generation is more important. Leachate recirculation campaigns should be done periodically to rewet the waste, boost microbial activity and hope for a quicker stabilization of the landfill.

关键词： Moisture Leachate Recirculation Biogas Distributed Reinjection Landfill

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numerical Study of Mixed Convection in a Photovoltaic Trombe Wall Channel Coupled with a Solar Chimney Integrated into a Building for Habitats Passive Cooling

引用

Open Journal of Applied Sciences（应用科学） 2020年第12期

作者： yawovi nougbléga Koffi Sagna Hodo-Abalo Samah Kodjo Kpode

来源：评论

学校读者我要写书评

暂无评论

Influence of Leachate Recirculation on Landfill Degradation and Biogas Production

引用

Energy and Power Engineering（能源与动力工程） 2023年第1期

作者： Kokou N’wuitcha Komlan Déla Donald Aoukou yawovi nougbléga MagolmèènaBanna Xavier Chesneau

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

COVID-19 Vaccination Status and Severe Outcomes among Patients Hospitalized for COVID-19 in West Africa, Togo, 2021

引用

Advances in Infectious Diseases 2024年第1期14卷 87-104页

作者： Awèréou Kotosso Yao Rodion Konu Lidaw Déassoua Bawe Sarakawabalo Assenouwe yawovi Mawufemo Tsevi Koffi Atsu Aziagbe Akouda Akessiwe Patassi Bawoubadi Abaltou Gnimdou Tchamdja Lampouguini Nebona Komi Séraphin Adjoh Didier Ekouevi Majesté Ihou Wateba Faculté des Sciences de la Santé Université de Lomé Lomé Togo Centre Hospitalier Régional Lomé Commune Lomé Togo Service des Maladies Infectieuses Centre Hospitalier Universitaire Sylvanus-Olympio Lomé Togo Unité de Recherche Mixte 1219 Bordeaux Population Health Centre University of Bordeaux National Institute for Health and Medical Research (INSERM) Research Institute for Sustainable Development (IRD) Bordeaux France Département de Santé Publique Université de Lomé Lomé Togo Faculté des Sciences de la Santé Université de Kara Kara Togo Service d’Anesthésie et Réanimation Centre Hospitalier Universitaire Kara Kara Togo Service de Néphrologie et d’Hémodialyse Centre Hospitalier Universitaire Sylvanus-Olympio Lomé Togo Service de Pneumo-Phtisiologie Centre Hospitalier Universitaire Sylvanus-Olympio Lomé Togo

Objectives: More than a year after its introduction, COVID-19 vaccination coverage was low in the Togolese population and little data were available on its benefits for hospitalized patients. This study aimed to describe the impact of COVID-19 vaccination on the prognosis of hospitalized patients. Methods: This was a retrospective cohort study of patients admitted to the Centre Hospitalier Régional Lomé Commune (Togo) between June 1, 2021 and May 31, 2022. Primary outcomes (admission to the intensive care unit and death) were presented with frequency and proportion. Mortality rates were presented by sociodemographic and clinical characteristics and compared by appropriate statistical tests. Factors associated with inpatient death were described by performing a Cox proportional hazard regression. Results: A total of 604 patients were hospitalized (50.0% women). The mean age was 54.03 ±17.1 years. Only 55 patients were fully vaccinated (9.1%). ICU admission was significantly more frequent in unvaccinated patients than in vaccinated ones (63.0% vs. 38.2%;p Conclusion: COVID-19 vaccination had a significant benefit for patients with COVID-19 infection in terms of reducing the risk of death. Based on real-world data from sub-Saharan Africa, this information can help optimize the benefit of COVID-19 vaccination by raising community awareness and increasing vaccine coverage while reducing hesitancy.

关键词： COVID-19 Vaccination Prognosis Mortality Sub-Saharan Africa

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Modeling and optimization of a multi-carrier renewable energy system for zero-energy consumption buildings

引用

Journal of Central South University 2022年第7期29卷 2330-2345页

作者： SOULEY AGBODJAN yawovi LIU Zhi-qiang WANG Jia-qiang YUE Chang LUO Zheng-yi School of Energy Science and Engineering Central South UniversityChangsha 410083China College of Civil Engineering Hunan UniversityChangsha 410082China

For the carbon-neutral,a multi-carrier renewable energy system(MRES),driven by the wind,solar and geothermal,was considered as an effective solution to mitigate CO2emissions and reduce energy usage in the building sector.A proper sizing method was essential for achieving the desired 100%renewable energy system of *** paper presented a bi-objective optimization formulation for sizing the MRES using a constrained genetic algorithm(ga)coupled with the loss of power supply probability(LPSP)method to achieve the minimal cost of the system and the reliability of the system to the load real time *** optimization App has been developed in MATLAB environment to offer a user-friendly interface and output the optimized design parameters when given the load demand.A case study of a swimming pool building was used to demonstrate the process of the proposed design *** to the conventional distributed energy system,the MRES is feasible with a lower annual total cost(ATC).Additionally,the ATC decreases as the power supply reliability of the renewable system *** is a decrease of 24%of the annual total cost when the power supply probability is equal to 8%compared to the baseline case with 0%power supply probability.

关键词： multi-carrier renewable energy system constrained genetic algorithm loss of power supply probability(LPSP)method zero-energy consumption building optimal device capacity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COVID-19 Vaccination Status and Severe Outcomes among Patients Hospitalized for COVID-19 in West Africa, Togo, 2021

引用

Advances in Infectious Diseases（传染病进展） 2024年第1期 87页

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Chronic Kidney Disease (CKD) in Patients Living with HIV under Antiretroviral Treatment: Prevalence and Risk Factors

引用

Open Journal of Nephrology 2019年第4期9卷 87-96页

作者： yawovi Mawufemo Tsevi Abdou Razak Moukaila Lidaw Déassoua Bawe Hubert Yao Nephrology and Hemodialysis Department Sylvanus Olympio Hospital of Lomé University of Lome-Togo Lomé Togo Internal Medicine Department Sylvanus Olympio Hospital of Lome University of Lome-Togo Lome Togo Infectious and Tropical Diseases Department Sylvanus Olympio Hospital of Lome University of Lome-Togo Lome Togo Internal Medicine Department Treichville University Hospital Université of Cocody (Ivory Coast) Abidjan Ivory Coast

CKD is one of the major complications when infected by HIV. The surveillance of CKD indicators and control of its determinants in the HIV-infected population in our African communities is essential. This was a descriptive and analytical cross-sectional study of people living with HIV received at the Ambulatory Treatment Center (ATC) at Infectious Diseases department of Sylvanus Olympio University Hospital (CHU-SO). The study period was 6 months—from January 1, 2018 to June 30, 2018—CKD was defined by a clearance below 60 ml/min/1.73 m2 for at least 3 months. A total of 117 patients were enrolled during the study period. The average age of patients for trial treatment was between 9.49 and 42.0 7 years. The duration of follow-up for antiretroviral treatment was ±3.22 to ±5.64 years. The female gender was predominant (70.09%) with a sex ratio (M/F) of 0.43. Most of people living with HIV were mostly classified at clinical stage 2 (31.03%) and 3 (31.90%) of WHO at initiation of HAART. The main CD4 rate was 223.30 ± 143.764 at initiation of HAART and 462.58 ± 202.723 at the time of the study. The majority of patients were placed in a fixed combination of Tenofovir/Lamivudine/Efavirenz in a proportion of 81.20% cases. CKD was found in 13 patients—that is 11.11% of patients. Univariate analysis shows that age greater than 45 years plus (p = 0.017) and pathological proteinuria (p = 0.021) were associated with CKD. In multivariate analysis, only ages (p = 0.045) and pathological proteinuria (p = 0.035) were significantly associated with CKD. The prevalence of CKD in HIV-infected patients is significant in Togo. The occurrence of proteinuria is linked to the delay in taking antiretroviral therapy.

关键词： CKD HIV HAART Togo

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evidence of Atlantic Extension in South-East Togo: Case of Fracturing in the Sandstone Relics of Tohoun

引用

International Journal of Geosciences 2021年第5期12卷 517-530页

作者： Essodina Padaro Mahaman Sani Tairou Yawoa Dzidzo Da Costa Zikpi yawovi Amoudji Département de Géologie Faculté des Sciences Université de Lomé Lomé Togo

The sandstone relics of probable Cretaceous age found around Tohoun show an extensional tectonics imprint associated with the Atlantic opening. This imprint consists of normal fault networks well expressed on two sites of outcrop and corresponds to three fracturing episodes materialized by families of conjugated planes striking E-W, NW-SE, and NE-SW. Striated plane data analysis shows three extensional axes successively N-S, NE-SW and NNW-SSE. The reconstructed paleostress tensors can be attributed to pre- to syn-rift phases responsible for the development of primary basin structures in the Gulf of Guinea. This preliminary analysis, concerning only fractures in the basal sequence relics, remains to be extended to the entire Togolese coastal basin to a better definition of the Atlantic dynamic.

关键词： Fractures Paleostress Atlantic Extension South-Togo

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：