Papers by Keyword: Cooling Tower

Abstract: A cooling tower is a cooling device often used in industries as a heat exchanger, where water is cooled by coming into direct contact with air. This process causes evaporation, which leads to a reduction in the water's temperature. We conducted an experimental study of the effect of the number of holes (80, 120, 185 and 250) on the cooling tower flat plate with variations of inlet temperature (65°C, 75°C and 85°C). This study aims to determine the heat transfer characteristics and how the number of holes and inlet temperature variations affect the performance of multi-story cooling towers. The cooling tower has an overall height of approximately 2.4 m, with each flat plate measuring 0.7 m x 0.5 m and a 15° slope. The results showed that the highest heat transfer rate occurred at 85°C inlet temperature with 250 holes. The largest heat transfer coefficient value occurred at 75°C inlet temperature with 250 holes. Thus, the number of holes significantly influences the heat transfer rate, convection heat transfer coefficient, and temperature difference in the optimization of the cooling tower performance.

Abstract: The effect of cut height on collapse area is simulated and analyzed by dynamic finite element software. Meanwhile, the simulated collapse processes of the cooling tower with different cut height were completed in a parallel study, the results of which are briefly introduced in this paper. The results show that: as the cut height increases, ground vibration on surrounding structures and collapse area of cooling tower decreases. At last, numerical simulation results were used in blasting project, which reduced hazard of collapse vibration and verify the scientific of this method.

Abstract: The cooling water system is the industry’s primary way of conserving water. Modern water cooling towers were invented during the industrial age to dissipate heat when natural cooling water sources were available. The origin of cooling towers made the plant site selection independent of the availability of water source. The development of new, high efficiency film fills produced from light weights, flame retarded PVC reduces the size and weight of cross flow cooling towers. Today’s cooling tower combine the latest advanced materials to achieve the optimum balancing of High corrosion resistance, product durability and cost. Based on their specific functions, cooling tower components are designed using the materials with the best combination of corrosion resistance and physical properties. In this work, the coefficient of performance is determined by using Simpson’s rule and the performance of cooling tower at various L/G ratios is evaluated. The optimum approach of the tower is calculated.

Abstract: Energy conservation and improvement in production efficiency are two greater challenges to modern-day manufacturing industries. The rapid growth as seen and forecasted for manufacturing sector has resulted in greater demand for electrical power and energy. This has given rise to the needs for alternative energy to supplement the existing energy resources. This paper proposes a SVAWT named as a regenerative energy air flow system that utilizes exhaust air flow speeds of a cooling tower in a manufacturing plant. The prototype is capable of voltage generation from 24 volts or more depending upon the number of coils and the constant speed of the air flow. This paper proved the feasibility of electrical energy generation utilizing captured kinetic energy from the air flow of a cooling tower thus promoting innovation in green technology in the manufacturing sector.

Abstract: The article considers the problem of effective protection of the cooling tower shell using the screen with a ventilated air gap. The aim is to determine the optimal parameters of the air gap. In operation, the calculations were performed showing the effects of temperature conditions and the thickness of the gap on the aerodynamic and thermal modes of operation. The article made conclusions based on the done calculations. The optimum thickness of the gap, provided heating air inlet, which provides the ability to assimilate air moisture throughout the layer and delete it in the atmosphere, which in the future will eliminate condensation on the cold surface of a concrete shell.

Abstract: UNIT-1 KAMOJANG geothermal power plant marked the new era of renewable energy in Indonesia. With its built capacity of 30 MWe, it constantly supply electricity to Java-Bali grid for more than 30 years now.Over those period, Unit-1 has given its best performance with highest achievement on Capacity Factor (CF) and Equivalent Availability Factor (EAF).High performance geothermal power plant involves the integration not only from the point of view of power generation, but also the optimation of geothermal potention in the area. Kamojang geothermal field, which is considered as one among five steam dominated reservoir in the world produces 200 MWe of the electricity nowadays. In order to maintain this production rate, some technical consideration must be made.Towards sustainable power generation of geothermal power, some assessment has been made to turbine, generator and cooling tower to ensure its current condition. Basically what it called remaining life assessment gives a rough picture of how long the equipment will run through in its operational condition.Based on those assessment, additional 20.900 hours is given to the turbine with the existing operating conditions. On the other hand, cooling tower infrastucture test and simulation delivers operation period for another 25 years.

Abstract: Wet cooling towers are commonly used in thermal power stations to cool the condenser feed water. The temperature of cooled condenser feed water, which reflects the performance of cooling towers, has a great influence on steam turbine back-pressure and generation efficiency. Merkel Enthalpy Potential Equation is widely used to calculate the temperature of cooled condenser feed water. It is known to all that there is only one true value in nature; however, several solutions according with the equation appears. This paper provides the method to identify the true value of condenser feed water from several solutions, and finally puts forward its iteration calculating method, including the determination of the initial value and stopping rules.

Abstract: Environmental cross-wind has a influence on cooling capacity of wet cooling tower to a great extent in power plant.The variation of circulating-water temperature difference (Δt) and cooling coefficient of efficiency(η) with cross-wind velocity, circulating water inlet temperature and flow rate, are shown under cross-wind conditions, compared with cases without wind. By using experimental platform of cooling water system based on 300MW thermal power unit,it is found that with cross-wind velocity increasing,cooling temperature difference and cooling efficiency decrease first then increase at the knee point when the velocity value is 0.8m/s. In addition, the correlation betweenΔt ,η and parameters,such as circulating-water inlet temperature and flow rate, is derived for cases with windless conditions.

Abstract: Measuring the Cooling Tower Noise by Standard Method, Analyzing the Radiation Noise Spectrum Characteristics, this Paper Carried on Full Analysis in the Principle and Control Methods. Noise Emission Meets the Standards and Showing Remarkable Economic Benefits and Social Benefits.Cooling Towers in Hotels, Shopping Malls, Office Buildings and so on were Usually Installed on the Roof or Deck. when they were Run, the Motor, the Fan and Dropping Water Produced Noise, which Diffused through the Air or Solid Conduction, Polluting the Environment.

Abstract: The response of a large-size cooling tower with 250m high subjected to the seismic action are investigated by both random vibration theory and response spectrum method. Shell element is taken to model the tower body, and beam element is used for the circular foundation and supporting columns. The earthquake motion input is a colored filtered white noise model and mode superposition method is adopted to analyze the random response of the large-size cooling tower. The paper presents the power spectrum density functions (PDF) and standard deviation of the displacement of the top and characteristic node, and the analysis results indicate that the results of the stationary random vibration theory and the response spectrum method are the same order of magnitude. The power spectrum density function of the bottom node stress is obviously bigger than the one at the top and the throat, and the random response of meridonal stress is dominated at the top. In addition, the peak frequency position of the power spectrum density function is different from the corresponding stress.