نتایج جستجو برای: telecommunication tower

تعداد نتایج: 19573  

Journal: :journal of mechanical research and application 2010
navid bozorgan

since the energy analysis considers the quantity of energy, it cannot show the performance of the cooling tower. therefore, in order to optimize the performance of the tower and also the process which the cooling tower is a part of it, it is necessary to analyze the energy and exergy of the tower simultaneously. in this paper, the energy and exergy of one of the cooling towers of khuzestan stee...

Journal: :Engineering Structures 2021

Lattice towers are used in several fields such as radio and television broadcasting, wireless communication or mobile networking. These lightweight structures which to support specific equipment certain heights for examples antennas needed signal transmission. The purpose of this paper is investigate the influence ancillary elements on aerodynamic coefficients telecommunication lattice towers. ...

Journal: :مطالعات باستان شناسی 0
رضا نظری ارشد دانشجوی دکتری باستان شناسی، گرایش دوران اسلامی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران محمود طاووسی استاد گروه باستان شناسی، دانشگاه تربیت مدرس سوسن بیانی استادیار گروه باستان شناسی، دانشگاه تهران جواد نیستانی دانشیار گروه باستان شناسی، دانشگاه تربیت مدرس

ghorban tower as an architectural monument is one of the outstanding resting- place of islamic era in hamadan city which has not been studied properly. previous studies on the tower concerning its architectural features or its historical background showed that the tower may be a place where a dignified religious man named khajeh hafez abol'ala hamadani berried inside in saljuk era and afte...

Journal: :international journal of environmental research 2009
a. ataei m.h. panjeshahi m. gharaie n. tahouni

temperature restrictions on aqueous effluents dictate that streams with a temperature higher than the permitted level needed to pass through cooling systems to reduce the effluent temperature before discharge. in this study, by considering the grouping design rules based on pinch technology, an optimum design for a distributed effluent cooling system, has been developed. a counter-flow wet cool...

Journal: :International Journal of Power Electronics and Drive Systems 2022

This study investigates the technical and cost-effective performance of options renewable energy sources to develop a green off-grid telecommunication tower replace diesel generators in Malaysia. For this purpose, solar, wind, pico-hydro energy, along with generators, were examined compare. In addition, modeling hybrid powering systems was conducted using optimization model for (HOMER) simulati...

and G. A. Iravani, H. Ahmadikia,

Design of a natural dry cooling tower has been accomplished in two sections: the design of heat exchangers and the numerical solution of flow through the tower. Heat exchanger (Heller type) has been simulated thermodynamically and then coupled with a computer program, which calculated the turbulent natural convection flow through the tower. The computer program developed for this purpose can be...

2004
Dr. Ron Cox

The Cooling Tower Energy & Operating Cost Analysis Software is an in-house program developed by Tower Tech and is used to design and evaluate the performance and life-cycle costs associated with a cooling tower. This version can be used to estimate the cost to purchase and operate a Tower Tech cooling tower and a competitor’s tower. A number of assumptions about the details of the competitor’s ...

Journal: :journal of computational applied mechanics 0
mohammad ali ardekani associate professor, iranian research organization for science and technology (irost), tehran, iran foad farhani assistant professor, iranian research organization for science and technology (irost), tehran, iran mohsen mazidi instructor, iranian research organization for science and technology (irost), tehran, iran

in a steam power plant, the temperature of the cooling water leaving the condenser for recyclingshould decrease. this is achieved in a cooling tower. the heller cooling tower does not require waterfor operation, thus, it is a suitable system for use in thermal power plants throughout iran. wind is anenvironmental factor that unfavorably affects the performance of a cooling tower. previous studi...

2008
Takashi Otake Marii Higuchi

This paper investigates the role of pitch accent information in spoken-word recognition in listeners in Fukushima, Japan, whose dialect is accentless. Previous research revealed that accentless listeners were less sensitive to pitch accent than Tokyo Japanese listeners. The present study asked whether middle-aged listeners’ use of accent information would differ from that of young listeners. 40...

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