Jul 05, 2014 model a hyperbolic cooling tower on sap2000 video tutorial download. Analysis of natural draught hyperbolic cooling towers by. Earthquake analysis of hyperbolic cooling towers pamukkale. Effect of buckling on analysis of hyperbolic cooling towers.
Manufacturors and users of cooling towers have very diverse requirements. Apr 23, 2014 you can analyse these structures in any finite element analysis software, i have seen designs done in staad pro using plate elements. A hyperboloid of one sheet is a doubly ruled surface, and it may be generated by either of two families of straight lines. The hyperbolic cooling tower in hamburg, germany, is made up of a regular dodecagonal space trusses without internal bracing. The hyperbolic shape itself does not help the cooling of a power plant. A natural draft tower also known as hyperbolic cooling tower is similar to an. The hyperbolic shape is just to have a stronger structure to deal with the high winds you get by increasing altitude. Two existing cooling towers are chosen from bellary thermal power station btps as case study. You can analyse these structures in any finite element analysis software, i have seen designs done in staad pro using plate elements. International journal of civil engineering nd and technology. This paper deals with the study of seismic analysis of hyperbolic cooling towers. The cooling towers make the control of the cooling process by controlled. The wetcooling software was developed with design verification in mind, not to.
Each cooling tower is 500 feet tall and approximately 370 feet wide at the bottom with concrete walls 20 inches thick. Finite element analysis of glass fiber reinforced plastic. Discretization errors in finite element models of hyperbolic. Keywords cooling tower, wind load analysis for cooling tower i. Significance of meshfineness in accuracy of finite. Nonlinear buckling analysis of hyperbolic cooling tower. Case 3 both height and shell thickness of cooling tower is varied. This paper is concerned with a numerical solution of hyperbolic cooling tower shell, a class of full nonlinear problems in solid mechanics of considerable interest in engineering applications. The chilled water system analysis tool cwsat software is developed as a.
Case study of seismic effect on hyperbolic cooling towers issuu. Numerical simulation of heat transfer process in solar enhanced natural draft dry. Creating a new model to predict cooling tower performance and. In this study, shell portion of the cooling towers has been modeled and assuming bottom end is fixed condition. Natural draught hyperbolic cooling towers are the characterizing land marks. Static and dynamic analysis of hyperbolic cooling tower. In example 6 we will use the design layout of a cooling tower to find a hyperbolic equation that models its sides. This paper leads to software package utilized towards a practical application by considering problem of natural draught hyperbolic cooling towers. Analysis and design of strengthened hyperbolic cooling tower. Three different cooling towers will modeled by using solidworks 2016 software i. This cooling tower has been analyzed for wind load using ansys software by assuming fixity at the shell base. The project deals with the performance study and analysis of induced draft cooling tower, which is one of the deciding factors used for increasing the power plant efficiency also modelling and analysis of flow using software. These con crete structures have the same height ft.
Significance of meshfineness in accuracy of finite element. For this analysis a single case of the tower with alternative i and v supports is taken up. May 28, 2019 what is the equation that determines the hyperbolic shape of a cooling tower. How to model a hyperbolic cooling tower on sap2000 youtube. Seismic analysis and design of a hyperbolic cooling tower ijsetr. Here we discusses hyperbolic stack natural draft cooling towers. In this analysis, the postbuckling analysis of cooling tower shell with discrete fixed support and under the action of wind loads and dead load is studied. A selection of finite shell element convergence study of finite shell elements available in ansys software is carried out, in order to.
Analysis of natural draught hyperbolic cooling tower by finite element method using equivalent plate method. Cooling towers hyperbolic stack natural draft cooling. Bacs product selection software contains performance and technical data for all of bacs evaporative cooling products. Under the working condition of gravity and wind load, to contrast the two models of the presence or absence of abdominal rod displacement, stress and unit axial force, and check the stability of compressive bar, and structural. The project deals with the performance study and analysis of induced draft cooling tower, which is one of the deciding factors used for increasing the power plant efficiency. It works on the principle of temperature difference between the air inside the tower and outside the tower. The boundary conditions considered are top end free and bottom end fixed. Air flows in to the tower through openings in the bottom, and cools the. Dynamic analysis of hyperbolic cooling tower, journal of civil engineering technology and research, civil, international journal of engineering trends and applications ijeta volume 3 issue 5, sep. Analysis and design of strengthened hyperbolic cooling. Natural draft cooling tower performance evaluation software. Solving applied problems involving hyperbolas college. Stability analysis and performance comparison of largescale.
A matlabbased program for the design and simulation of. Effect of wind loading on analysis of natural draught. Cooling tower calculations software program is a powerful, user friendly, software program for the analysis of induced, mechanicaldraft, counterflow cooling towers. Each cooling tower is 500 feet tall and approximately 370 feet wide at the bottom. Hyperbolic software competence at your service tidy up 5 a new generation of our duplicate finder. This paper leads to software package utilized towards a practical application by considering problem of natural draught. Home software training model a hyperbolic cooling tower on sap2000. How does the shape of a hyperbolic cooling tower like those. Study the effect of wind load and dead load on rc hyperbolic. We use german finite element software sofistik, where shell elements can be used.
The material properties of the cooling tower are youngs modulus 31gpa, poissons ratio 0. Introduction hyperbolic cooling towers are large, thin shell reinforced concrete structures which contribute to environmental protection and to power generation efficiency and reliability. Fluidika techlabs cooling tower performance evaluation software. How to model a hyperbolic cooling tower on sap2000.
Hyperbolic cooling tower, dynamic analysis, earthquake. The software program can be used for the analysis of existing towers or for the preparation of specifications for new towers. With respect to the steel quantity and peak displacement index, the seven systems were analyzed and compared. The software, which was accepted very well by a population of 90 students, was evaluated. The cooling tower construction contains over 3,900 cubic yards of concrete and 488,000 pounds of reinforcing steel. Contrastive analysis is made on stress, internal force, displacement and failure probability of cooling tower shell. Two analysis methods done and compared were time history and response spectrum. Effect of wind loading on analysis of natural draught hyperbolic.
Abaqus, shell, hyperbolic cooling tower, static, buckling i. A selection of finite shell element convergence study of finite shell elements available in ansys software is carried out, in order to validate the proper shell element. Cooling towers are designed and manufactured in several types, with numerous sizes available. Static and dynamic analysis of hyperbolic cooling tower 43 description of the geometry of the towers.
Contrastive analysis is made on stress, internal force. Experimental studies on cooling tower the hyperbolic cooling towers are subjected to static and dynamic loads. Hyperbolic cooling towers are an essential part of thermal power plants. Eigen buckling analysis is carried out for three cooling towers using fea based ansys software. What is the equation that determines the hyperbolic shape of. Feb 05, 2015 2 n prabhakar technical manager, bombay structural aspects of hyperbolic cooling tower, national seminar on cooling tower, jan1990, technical session iv, paper no 9 3 prashanth n, sayeed. Because of circular symmetry, its just the equation of a section through the vertical axis of symmetry math\fracz2a2\fracr2b21math where mathzmat. This is not to say that the software cant be used for the design of cooling towers.
What is the equation that determines the hyperbolic shape of a cooling tower. The mae west sculpture is a doubly ruled surface hyperboloid structure, munich, germany, 2011. Hyperboloid structure hyperbolic structures have a negative gaussian. Structural analysis and design software for power plants. Modal analysis of a thermal power plant cooling tower. The cooling towers varying shape required flexible formwork for the changing diameters of the tower. Today, the tallest cooling towers are in france, standing a remarkable 170 meters tall. A cooling tower is an enclosed device, designed for the.
Proceedings of the 2 nd international conference on current trends in engineering and management icctem 2014 17 19, july 2014, mysore, karnataka, india 9 static and dynamic analysis of. Abstractthis paper deals with the study of hyperbolic cooling tower of 175m high above ground level. The top of cooling towers widens because this is the point where hot air from inside the tower diffuses and mixes with the atmospheric air. Kulkarni 3, software package utilized towards a practical application by considering the problem of natural draught hyperbolic cooling towers. According to the parametric analysis scheme, considering all the combinations of each parameter, the seven types of hyperbolic steel coolingtower systems were studied systematically. Nonlinear buckling analysis of hyperbolic cooling tower shell. Applicating the finite element analysis software ansys to do finite element analysis of a glass fiber reinforced plastic hyperbolic natural draft cooling tower. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
Abstract hyperbolic cooling towers are large, thin shell reinforced concrete. The analysis of thin shells of revolution in general has always occupied an important place in the theory of structures, and recently the problem of hyperbolic cooling towers has attracted many investigators due to the wide use of such shells in industry. Natural draught cooling towers are very common in modern days thermal and nuclear power stations. Air flows in to the tower through openings in the bottom, and cools the entering hot water. Slunecna rozhledna, sunny lookout tower is a simpler hyperboloid structure, velke pavlovice, czech republic, 2009. The following sections each deal with a particular stage of analysis and define the pertinent methods that were used at that stage. Computational software to analyze and determine cooling performance curves and thermophysical operational variables in natural draft counterflow wet cooling.
Introduction a cooling tower is an enclosed device, designed for the evaporative cooling of water where hot water. The study includes the comparison between two existing cooling towers of different element types and varying mesh ratio is adopted and also. The finite element analysis of hyperbolic cooling tower under quasistatic wind load 1, using a constant meridional curvature element and semiloof shell elements. In consideration of the uncertain factors, a hyperbolic cooling tower with initial geometrical imperfections is studied by the pds module in ansys. The study includes the comparison between two existing cooling towers of different element types and varying mesh ratio is adopted and also deflection pattern, maximum principal stresses. In the power generation industry, a wellmaintained. Structure a is a typical hyperbolic cooling tower shell. Because of circular symmetry, its just the equation of a section through the vertical axis of symmetry. Two cooling towers with different heights are analyzed. Dynamic loads are dominant loads among all other loads. Parametric analysis of hyperbolic cooling tower under. Thes e towers with very small shell thickness are exceptional stru ct res by their sheer size and sensitivity to horizontal loads. What makes the cooling successful is the height of the tower.
Both the towers have varying thickness throughout the height. Bellary thermal power station is a power generating unit near kudatini village in bellary. Model a hyperbolic cooling tower on sap2000 video tutorial download. Study on buckling behaviour of hyperbolic cooling towers. Dec 15, 2015 the top of cooling towers widens because this is the point where hot air from inside the tower diffuses and mixes with the atmospheric air. All the fe models used to analyze the hyperbolic cooling tower. Effect of wind loading on analysis of natural draught hyperbolic cooling tower. Data analysis was initiated for a sample of 45 data per group and. Hyperbolic cooling tower repair structural technologies. Therefore, we want to maximize the area through which this diffusion takes place, so that more hot vapor is quickly mixed and the entire process of cooling is done more efficiently. In this study analysis and modelling were done using software. Case study of seismic effect on hyperbolic cooling towers.
Pdf analysis studying for improving cooling tower researchgate. The objective function is set to be the minimum weight of the tower. It is the most commonly used shape among natural draught cooling towers. If you read this book carefully, you can make any cooling tower design programs by yourself. We developed our first duplicate finder doublet scan in 1996, on classic mac os. Solving applied problems involving hyperbolas college algebra. A lot of research work was reported in the literature on the wind load on cooling tower. Data from fe analysis three different hyperbolic cooling tower shells are analyzed using different fe mesh sizes. The linear static analysis of hyperbolic cooling tower is carried out using different shell elements. This cooling tower has been analyzed for wind load using ansys software by assuming fixity at the. Again, this will be a first issue releasing the actual engineering approach. Hyperbolic cooling tower repair preventative maintenance is essential in protecting critical infrastructure and keeping facilities operational. How does the shape of a hyperbolic cooling tower like. The hyperbolic cooling tower is modeled by sketching the curved portion by arc command in a given height and.
The static and dynamic analysis of hyperbolic cooling tower. Case study on effect of static and dynamic loads on. The major concern during i study the cooling tower theory was how to computerize the cooling tower theory from the calculation of ntu to the cooling tower performance analysis. How to design a natural draft cooling tower hyperbolic. In the power generation industry, a wellmaintained cooling tower enables the entire cooling system to perform at optimum efficiency. Finite element analysis of hyperbolic cooling tower by the. They are an imposing characteristic and integral part of thermal power plants all. Extent of cooling tower selection software parameter variation. The main interest is to demonstrate that the column supports to the tower could be replaced by equivalent shell elements so that the software developed could easily be utilized. Cooling towers, closed circuit cooling towers, and evaporative condensers. Finite element analysis of hyperbolic cooling towers. Stability analysis and performance comparison of large. Static and model analysis will perform by using ansys 16. Mar 01, 20 here we discusses hyperbolic stack natural draft cooling towers.
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