2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC)最新文献_第5页

Solar — Assisted air — Conditioning for energy saving in a feeder in Sulaimani governorate 苏莱曼尼省一馈线节能用太阳能辅助空调

2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC) Pub Date : 2016-07-13 DOI: 10.1109/REDEC.2016.7577541

P. Ali, Dlzar M. Majeed, A. M. Amin

{"title":"Solar — Assisted air — Conditioning for energy saving in a feeder in Sulaimani governorate","authors":"P. Ali, Dlzar M. Majeed, A. M. Amin","doi":"10.1109/REDEC.2016.7577541","DOIUrl":"https://doi.org/10.1109/REDEC.2016.7577541","url":null,"abstract":"Air conditioning is the dominating energy-consuming service in buildings in many countries. In many regions around the world demand for cooling and heating of indoor air is rising due to increasing comfort expectations and growing cooling loads. Kurdistan region has a very sunny climate with high demand for air conditioning. Conventional air conditioning impacts upon the electricity grid and threaten the environment to affect life quality of people. The electricity grid increasingly faces the danger of overload due to air conditioner use during the hot summer days which would cause essential power service disruption. However, solar assisted air conditioning offers an alternative way to meet the increasing cooling and heating demand in buildings of the region in an energy-efficient way. Accordingly, this paper investigates the technical feasibility of using a typical heat pipe evacuated tube collector system with small and medium scales for Electric Distribution Directorate Building in Sulaimani and its impact on terminal voltage, active and reactive power losses on the feeder. The working principles, system suitability for solar cooling and heating have been simulated with the help of Excel and ETAP 11.0.0 software.","PeriodicalId":158844,"journal":{"name":"2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"223 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131591153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Implementing a didactic photovoltaic energy laboratory for developing countries 为发展中国家建立一个教学光伏能源实验室

2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC) Pub Date : 2016-07-13 DOI: 10.1109/REDEC.2016.7577551

B. Nehme, T. Akiki

引用次数: 3

Minimizing energy consumption in Wastewater Treatment Plants 尽量减少污水处理厂的能源消耗

2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC) Pub Date : 2016-07-13 DOI: 10.1109/REDEC.2016.7577507

W. Ghoneim, A. Helal, M. A. Abdel Wahab

引用次数: 8

Locations of vortices and their impacts on the aerodynamic performances of a diffuser and a DAWT 旋涡位置及其对扩压器和DAWT气动性能的影响

2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC) Pub Date : 2016-07-13 DOI: 10.1109/REDEC.2016.7577536

M. Kardous, Rym Chaker, F. Aloui, I. Abidi

{"title":"Locations of vortices and their impacts on the aerodynamic performances of a diffuser and a DAWT","authors":"M. Kardous, Rym Chaker, F. Aloui, I. Abidi","doi":"10.1109/REDEC.2016.7577536","DOIUrl":"https://doi.org/10.1109/REDEC.2016.7577536","url":null,"abstract":"Geometric features of an unloaded Diffuser Augmented Wind Turbine (DAWT), are the main parameters controlling the aerodynamic performances of this wind-energy device. Results obtained from wind-tunnel experiments, Particle Image Velocimetry (PIV) measurements and numerical simulations, show that the wind velocity of the airflow increases while approaching the diffuser. It attains a maximum value at the diffuser's throat, where a wind turbine should be mounted, and then it decreases. The wind velocity increase, depends mostly on the positions of a two contra-rotating vortices generated behind the diffuser's flange due to the Kelvin-Helmholtz instabilities. The best aerodynamic performances of the diffuser are obtained when these vortices are located too near from the flange without being introduced into the area situated immediately downstream the diffuser's outlet section. At the same time, the flange's height, the open angle and the length of the diffuser reach their optimal values. Beyond these values, one of the two vortices tends to submerge in the area delimited by the diffuser's outlet section. As a result, a boundary-layer separation takes place at the diffuser's inner wall, and the geometric characteristics become without significant effect on increasing the wind velocity. In practice, this means that the diffuser could be more efficient if equipped with a control system, able to hold the vortices too near from the flange.","PeriodicalId":158844,"journal":{"name":"2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128846211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Including core losses in induction motors dynamic model 包括异步电动机铁芯损耗的动态模型

2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC) Pub Date : 2016-07-01 DOI: 10.1109/REDEC.2016.7577556

G. Khoury, R. Ghosn, F. Khatounian, M. Fadel, M. Tientcheu

{"title":"Including core losses in induction motors dynamic model","authors":"G. Khoury, R. Ghosn, F. Khatounian, M. Fadel, M. Tientcheu","doi":"10.1109/REDEC.2016.7577556","DOIUrl":"https://doi.org/10.1109/REDEC.2016.7577556","url":null,"abstract":"Energy efficiency improvement is the main target of many recent studies in various domains, especially for electrical drives which constitute the core of industrial applications. The simulation of induction motors is based on static and dynamic models that allow the study of their mechanical performances, as well as their power consumption and losses. However, the commonly used dynamic model doesn't take into consideration the core losses in the motor, which have a significant impact on its energy efficiency. The purpose of this paper is to present two methods for including core losses in the dynamic model of squirrel-cage induction motors (IM) in addition to the copper and mechanical losses that are already taken into consideration in the commonly used model. Core losses are introduced as an equivalent torque reduction in the mechanical equation, or as an equivalent resistor in the model's equations. The proposed model is essential for future studies aiming to improve the energy efficiency of the motor. Both methods are analyzed and simulated using Matlab/Simulink and the obtained results are experimentally validated. The performances of these proposed methods are compared in order to find the best suitable method for future applications and induction motor studies.","PeriodicalId":158844,"journal":{"name":"2016 3rd International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116914446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4