Download or read book Experimental Performance of the Full Scale Periodic Cooling Tower written by John William Dong and published by . This book was released on 1976 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvement of the Environmental and Economic Characteristics of Cooling Towers written by Pou Cheong Hon and published by . This book was released on 1975 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research for the past year on methods to enhance the environmental and economic performance of dry cooling towers. The work has concentrated on dry cooling towers utilizing periodic water to air heat exchangers. Periodic towers have sheet metal discs partially submerged in hot, power plant condenser effluent. As the discs rotate, the discs alternately absorb heat from the effluent and discharge heat to the air. The means of heat transfer on the air side can be either evaporative and/or convective, depending upon the amount of effluent carried into the air side on the surface of the plates. An oil layer, floated on the water's surface, has been shown to be effective in eliminating water carry-over to the air side. The advantages of the periodic tower lie in the low cost of the discs and the ability to operate dry . A periodic tower should be significantly less expensive than a conventional dry tower fabricated with finned tubes. Further, since the periodic tower can also operate wet, by removing the oil film, the high capacity losses incurred during warm months by conventional dry towers can be eliminated. In the past year, tests on a 20 inch model of the periodic tower indicated that at operational speeds of the full sized disc, no noticeable churning of the oil layer occurred. Heat transfer rates measured with the 20 inch model were 20 percent higher than predicted by an approximate analysis. Finally, silicone oils' low vapor pressure make them superior to hydrocarbon oils on the basis of evaporation rates, but their higher costs and possible ecological impact necessitates a closer look at hydrocarbon oils. Construction of the full scale test facility is complete. Shaped, rigid five foot diameter discs have been designed, fabricated, and assembled into an initial test module. Instrumentation for heat transfer tests is also complete; including instrumentation for measuring disc temperatures, and both air and water flow rates and temperatures. A parametric study of the oil film thickness on the air side of the test module has been completed. Measured thicknesses were 20 percent less than that previously predicted. This thinner oil layer means an increase in the disc heat transfer. A test apparatus to study the further enhancement of disc performance by surface roughening has been constructed, instrumented and calibrated. The apparatus has reproduced experimental friction factor and heat transfer coefficient curves for flat plates, and will be used to evaluate enhancement as a function of rib shape, size, spacings and Reynold's number. Visits to several architectural engineers across the country were made with representatives of Air Preheater Company to gage their acceptance of the rotary concept. All felt that if the reliability of the rotary concept could be demonstrated and the costs were less than equivalent conventional dry towers, the rotary design would be the preferred choice. Based on these findings, Air Preheater is planning to do design and cost studies of the rotary concept for the coming year.
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for lnformation and Numerica/ Data Analysis and Synthesis (C/NDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficia! to the academic and general scientific and technical community. After fi ve years of this joint undertaking we had concluded that it was in the interest of ali concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and App/ied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. Ali back issues can also be ordered from Plenum. We have reported in Volume 21 (thesis year 1976) a total of 10,586 theses titles from 25 Canadian and 219 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work.
Download or read book The Periodic Cooling Tower Flow Visualization Surface Roughening and Full Scale Model written by Pou Cheong Hon and published by . This book was released on 1974 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooling Tower Performance written by Donald Baker and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic reference begins with a brief review of the origins and early history of cooling towers and finally brings together the variety of terms in the industry into a uniform system of terminology. Facts accumulated as a result of laboratory testing together with full-scale tests in the field provide the basis for the methods described in the book. Provides easy to use combination of steps in which to incorporate the Merkel theory. English-American units of measure are used in the examples with metric equivalents shown in parentheses. Appendices contain tables of appropriate constants and conversion factors for use with SI. This guide is of great benefit to cooling tower users, operators and plant designers.
Download or read book Improvement of the Environmental and Economic Characteristics of Cooling Towers the Periodic Cooling Tower Small Scale Full Scale and Surface Roughening Tests written by Massachusetts Institute of Technology. Energy Laboratory and published by . This book was released on 1975 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Periodic Cooling Tower with Annular Heat Transfer Surfaces written by Joseph Emil Giansante and published by . This book was released on 1977 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvements of the Environmental and Economic Characteristics of Cooling Towers Part II of II Periodic Cooling Tower flow Visualization Surface Roughening and Full Scale Model written by Massachusetts Institute of Technology. Energy Laboratory and published by . This book was released on 1974 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1977 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of a Model Periodic Cooling Tower for Electric Power Plants written by Pou Cheong Hon and published by . This book was released on 1975 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Cooling Tower written by G. N. Stuart and published by . This book was released on 1970 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigation of Performance of a Mechanical draft Cooling Tower and the Theoretical Prediction of Mass Conductance written by A. F. Concheso and published by . This book was released on 1957 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Wet dry Cooling Tower Concept Performance Prediction written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this year's work has been to test and analyze the new dry cooling tower surface previously developed. The model heat transfer test apparatus built last year has been instrumented for temperature, humidity and flow measurement and performance has been measured under a variety of operating conditions. Tower Tests showed approximately 40 to 50% of the total energy transfer as taking place due to evaporation. This can be compared to approximately 80 to 85% for a conventional wet cooling tower. Comparison of the model tower test results with those of a computer simulation has demonstrated the validity of that simulation and its use as a design tool. Computer predictions have been made for a full-size tower system operating at several locations. Experience with this counterflow model tower has suggested that several design problems may be avoided by blowing the cooling air horizontally through the packing section. This crossflow concept was built from the previous counterflow apparatus and included the design and fabrication of new packing plates. Instrumentation and testing of the counterflow model produced data with an average experimental error of 10%. These results were compared to the predictions of a computer model written for the crossflow configuration. In 14 test runs the predicted total heat transfer differed from the measured total heat transfer by no more than 8% with most runs coming well within 5%. With the computer analogy's validity established, it may now be used to help predict the performance of fullscale wet-dry towers.
Download or read book Energy Performance Estimation of Cooling Towers written by Zilai Zhao and published by . This book was released on 2016 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to investigate and compare the performance of cooling towers using Effectiveness-NTU model and the empirical model of cooling towers. The process of achieving the goals includes: Developed both models of the cooling tower using the Effectiveness-NTU method, and empirical method for predicting the performance at the design and off-design conditions; Stated experimental protocols and gathered data on HVAC cooling towers on campus of the University of Alabama; Used collected data to validate the models; Compared results from models with real measurements and find the limitations of models; Applied known annual weather data to estimate the performance and energy consumption of cooling tower for a whole year; Recommended the approach for the best energy and heat performance of cooling towers. As a result, the Effectiveness-NTU model provided closer results than the empirical model. All data and specifications were measured and gathered from the experiment on the cooling tower on campus. However, the air mass flow rate and the temperature of the leaving air were not always possible to gather in different cooling towers, especially industry cooling towers. Therefore, both models were designed to predict mass flow rate, and temperature of the leaving air by applying air temperature and relative humidity. Further testing is required to validate the accuracy of the models because there was a limited control over the running status of fans and the experiments were not done in wintertime with lower entering air temperature. Validation of the models on another cooling tower is also essential. Additionally, the empirical model can be improved if there is a way to reset all 27 coefficients based on different cooling towers.
Download or read book Inventory of energy research and development 1973 1975 written by Oak Ridge National Laboratory and published by . This book was released on 1976 with total page 1324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooling Tower Performance Variables written by Cooling Tower Institute (U.S.) and published by . This book was released on 1977 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
