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Effect of Mixed Working Fluid Composition on Binary Cycle Condenser Heat Transfer Coefficients Dan Wendt, Greg Mines Idaho National Laboratory The use of mixed working fluids in binary power plants can provide significant increases in plant performance, provided the heat exchangers are designed to take advantage of these fluids non-isothermal phase changes. In the 1980's testing was conducted at DOE's Heat Cycle Research Facility (HCRF) where mixtures of different compositions were vaporized at supercritical pressures and then condensed. This testing had focused on using the data collected to verify that Heat Transfer Research Incorporated (HTRI) codes were suitable for the design of heat exchangers that could be used with mixtures. The HCRF data includes mixture compositions varying from 0% to 40% isopentane and condenser tube orientations of 15{sup o}, 60{sup o}, and 90{sup o} from horizontal. Testing was performed over a range of working fluid and cooling fluid conditions. Though the condenser used in this testing was water cooled, the working fluid condensation occurred on the tube-side of the heat exchanger. This tube-side condensation is analogous to that in an air-cooled condenser. Tube-side condensing heat transfer coefficient information gleaned from the HCRF testing is used in this study to assess the suitability of air-cooled condenser designs for use with mixtures. Results of an air-cooled binary plant process model performed with Aspen Plus indicate that that the optimal mixture composition (producing the maximum net power for the scenario considered) is within the range of compositions for which data exist. The HCRF data is used to assess the impact of composition, tube orientation, and process parameters on the condensing heat transfer coefficients. The sensitivity of the condensing coefficients to these factors is evaluated and the suitability of air-cooled condenser designs with mixtures is assessed. This paper summarizes the evaluation of the HCRF data and discusses the next steps in the project evaluation of air-cooled condenser designs that can take advantage of the performance gains possible with these fluids.
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Hvac Air-Cooled Condenser Fundamentals: Design, Operations, Troubleshooting, Maintenance, and Q&A is the ultimate guide for professionals and students in the field of HVAC and refrigeration. This comprehensive book covers all aspects of air-cooled condenser design, operations, troubleshooting, and maintenance. With clear explanations and practical examples, this book provides an in-depth understanding of air-cooled condenser systems, including their components, working principles, and various types. The book also covers the latest technologies and industry standards, making it a valuable resource for professionals and students alike. The book includes a comprehensive section on air-cooled condenser troubleshooting, including common problems and solutions, as well as a section on maintenance, including preventative measures and best practices. Additionally, the book includes a comprehensive Q&A section, providing answers to the most common questions about air-cooled condensers. Whether you are a seasoned professional or just starting out, "Air-Cooled Condenser Fundamentals: Design, Operations, Troubleshooting, Maintenance, and Q&A" is the essential resource you need to master air-cooled condenser systems. With its clear and concise explanations, practical examples, and expert insights, this book is a must-have for anyone working in the field of HVAC and refrigeration.
Bachelor Thesis from the year 2018 in the subject Engineering - Mechanical Engineering, grade: 1, Savitribai Phule Pune University, formerly University of Pune, course: Bachelors in Mechanical Engineering, language: English, abstract: Evaporative cooling takes advantage of the potential of the outside air in dry climates to absorb moisture, which results in a temperature reduction of the air stream. But one of the major drawbacks is the continuous scale built up on condenser tubes which makes a barrier between tubes and water sprayed on them, which in turn drastically reduces the heat transfer. This results in a loss of plant efficiency and increases annual refrigeration costs as the compressor work increases for compensating the pressure drop due to scaling. In HVAC around 27% of worldwide energy is consumed only for different HVAC applications. This project mainly focuses on this problem statement, if the scale is 0.06mm then condenser performance decreases by 16%. A mainly evaporative condenser is used in different HVAC applications. In order to overcome this problem, regular maintenance of the condenser should be done by descaling the coils. Various descaling methods are being used in industries descaling like mechanical descaling, chemical descaling, etc. But manual descaling is preferred over other methods due to its simplicity, less cost, and reliability. Yet there are some problems in manual descaling like the number of rows of condensing tubes is very large in numbers and also the pitch between them is less so it becomes very difficult to reach the deep portion of the evaporative condenser in order to clean them thoroughly and effectively scale removal.
Air-Cooled Condenser Fundamentals: Design, Operations, Troubleshooting, Maintenance, and Q&A"" is the ultimate guide for professionals and students in the field of HVAC and refrigeration. This comprehensive book covers all aspects of air-cooled condenser design, operations, troubleshooting, and maintenance. With clear explanations and practical examples, this book provides an in-depth understanding of air-cooled condenser systems, including their components, working principles, and various types. The book also covers the latest technologies and industry standards, making it a valuable resource for professionals and students alike. The book includes a comprehensive section on air-cooled condenser troubleshooting, including common problems and solutions, as well as a section on maintenance, including preventative measures and best practices. Additionally, the book includes a comprehensive Q&A section, providing answers to the most common questions about air-cooled condensers. Whether you are a seasoned professional or just starting out, ""Air-Cooled Condenser Fundamentals: Design, Operations, Troubleshooting, Maintenance, and Q&A"" is the essential resource you need to master air-cooled condenser systems. With its clear and concise explanations, practical examples, and expert insights, this book is a must-have for anyone working in the field of HVAC and refrigeration.