IJERT-CFD Analysis Of FRP Counter Flow Cooling Tower In Blow Molding Machine (original) (raw)

Experimental and Analytical Investigation to Improve the Efficiency of Industrial Cooling Tower

Cooling towers make use of evaporation whereby some of the water is evaporated into a moving air stream and subsequently discharged into the atmosphere. As a result, the remainder of the water is cooled down significantly.The process parameters such as inlet air rate, water flow rate and fills porosity have more influence on Thermal performance of cooling tower. The Temperature of outlet water is maintained nearest to inlet air wet bulb temperature to obtain the best Thermal Performance of cooling tower. So current work is to obtain and maintaining outlet water Temperature nearest to inlet air wet bulb temperature. The cooling tower fill is the most critical component in the operation of the cooling tower. The function of the tower fill is to provide a maximum contact surface between the water and the air to promote evaporation and heat transfer. Cooling tower fill accelerates the transfer of heat from circulating water by maximizing the contact area between water and air. So inlet water flow rate, inlet air rate and fill porosity are important factor to maintain the outlet temperature of water nearest to inlet air wet bulb temperature.

Design & Performance Enhancement of Induced Draft Counter Flow Wet Type Cooling Tower

— Cooling towers are one of the biggest heat and mass transfer devices used to transfer process waste heat to the atmosphere. Cooling towers make use of evaporation whereby some of the water is evaporated into a moving air stream and subsequently discharged into the atmosphere. As a result, the remainder of the water is cooled down significantly. The process parameters such as inlet Air Wet bulb Temperature, Flow rate of Water and fills porosity have more influence on Thermal performance of cooling tower. The Temperature of outlet water is maintained nearest to inlet air wet bulb temperature to obtain the best Thermal Performance of cooling tower. Finite element method is one of the powerful numerical techniques to solve the complex physical phenomenon that are governed by the differential equations. Many of the practical engineering problems such as structural, thermal, magnetic, acoustic, etc. can be solved by the finite element method. Moreover, the finite element method is an increasingly common tool for engineering design. Design and dimension are taken from Dishman Pharmaceutical And Chemical Limited,Naroda GIDC, Ahmedabad, Gujarat. In this research work my objective is to get optimum condition which gives the maximum effectiveness in counter flow FRP cooling tower. For effectiveness parameters like inlet water flow rate, inlet air rate and fill porosity are considering in this research. So optimization of heat transfer is done by using taguchi method. Taguchi method is reducing the number is experiment. Here also used the Minitab software for taguchi method. For this model of cooling tower is made in Creo 2.0 then convert this model in STEP file and imported in ANSYS Workbench for CFD analysis. In this paper present the CFD analysis of cooling tower and comparing this result to practical reading. For taking practical reading temperature sensor and thermocouple is used.

Performance Assessment of a Counter Flow Cooling Tower – Unique Approach

Energy Procedia, 2017

Cooling tower is one of the most suitable system for evaporative cooling of hot water in comparison with other types of evaporative cooling systems. In the present study, a finite difference model is developed for predicting the characteristics of coupled heat and mass transfer processes occurring in a counter flow forced draft cooling tower. This model consists of thermal effectiveness, height of the tower and moisture effectiveness as variable parameters, and provides a correlation for heat and mass transfer coefficients in order to obtain the desired performance parameters. The predicted results for evaporative cooling process are in good agreement with the experimentally measured data. The mathematical model developed in this study can be used as a tool for predicting the cooling tower performance characteristics.

Application of CFD to closed-wet cooling towers

Computational¯uid dynamics (CFD) is applied to predicting the performance of closed-wet cooling towers (CWCTs) for chilled ceilings according to the cooling capacity and pressure loss. The prediction involves the two-phase¯ow of gas and water droplets. The predicted thermal performance is compared with experimental measurement for a large industrial CWCT and a small prototype cooling tower. CFD is then applied to the design of a new cooling tower for ®eld testing. The accuracy of CFD modelling of the pressure loss for¯uid¯ow over the heat exchanger is assessed for a range of¯ow velocities applied in CWCTs. The predicted pressure loss for single-phase¯ow of air over the heat exchanger is in good agreement with the empirical equation for tube bundles. CFD can be used to assess the eect of¯ow interference on the¯uid distribution and pressure loss of single-and multi-phase¯ow over the heat exchanger. 7

Parametric CFD Analysis for the Evaluation of Evaporative Cooler Performances

Instrumentation Mesure Métrologie

Air coolers in an industrial plant are often a fundamental device to guarantee optimal conditions for processes. Evaporative air coolers are used to cool an air flow through the injection of water. They are also used to cool water in industrial process. They exploit a closed and pressurized circuit which implements cooling by forced exchange with air. In this paper the Computational Thermo-fluid Dynamics has allowed to evaluate the performance of evaporative cooling provided by the use of a water spray system. The analyzes allowed to study and identify the optimal configuration according to different parameters. The aim is to find out the arrangement that provides higher efficiencies. Configurations analysed differ from each other for droplet size, nozzle arrangement and air velocity. In the CFD analysis, the Discrete Phase Model is used to simulate the water injection on the continuous phase, represented by the air. In this way, heat transfer for droplet evaporation can be evaluated. This knowledge is crucial for designing efficient spray cooling systems. In addition to the efficiency improvement, correctly dimensioning an air cooler involves considerable advantages. In fact, other objectives obtained concern saving of water, necessary for example in arid areas, and the reduction of costs.

Analysis Studying For Improving Cooling Tower

Kirkuk University Journal-Scientific Studies, 2016

The present investigation includes a detailed study of the proposed equation for counter flow wet cooling tower using Merkel and Poppe models to show the difference and solutions techniques of the proposed models. A mathematical model has been suggested to construct computer software MATLB R2013 program for simulation of natural draft wet cooling tower for summer (hot and dry) and winter (cold and wet) weather according to Iraqi weather. The fill height changed from (0.2-1.4)m at different water inlet temperature (37 ، 40 ، 45) o C and constant mass flow rate of air .It was found that the range of cooling increases when the fill is high and the cooling range ,relative humidity ,cooling approach ,air temperature change are higher at winter than at summer while the effectiveness and enthalpy change show higher value at summer than winter. Also the mass flow rate of water changed from(1-7.5) kg/s with water inlet temperature 45 o C with constant fill height 1.2 m the result obtained show that tower range ، air temperature change ,are higher in winter than at summer where the enthalpy change and effectiveness show higher values at summer than at winter which matches with the other experimental researches.

Thermodynamic study of wet cooling tower performance

International Journal of Energy Research, 2006

An analytical model was developed to describe thermodynamically the water evaporation process inside a counter-flow wet cooling tower, where the air stream is in direct contact with the falling water, based on the implementation of the energy and mass balance between air and water stream describing thus, the rate of change of air temperature, humidity ratio, water temperature and evaporated water mass along tower height. The reliability of model predictions was ensured by comparisons made with pertinent experimental data, which were obtained from the literature. The paper elaborated the effect of atmospheric conditions, water mass flow rate and water inlet temperature on the variation of the thermodynamic properties of moist air inside the cooling tower and on its thermal performance characteristics. The analysis of the theoretical results revealed that the thermal performance of the cooling tower is sensitive to the degree of saturation of inlet air. Hence, the cooling capacity of the cooling tower increases with decreasing inlet air wet bulb temperature whereas the overall water temperature fall is curtailed with increasing water to air mass ratio. The change of inlet water temperature does not affect seriously the thermal behaviour of the cooling tower.