HVAC Pumps Characteristics and Energy Efficiency

HVAC Pumps Characteristics and Energy Efficiency

Author: Anuj Bhatia

Publisher: Createspace Independent Pub

Published: 2015-03

Total Pages: 74

ISBN-13: 9781508676607

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Most HVAC systems are designed to handle the maximum potential temperature extremes, keeping the building cool on the hottest days and warm on the coldest days. As a result, the HVAC system only needs to work at full capacity on the ten or so hottest and coldest days of the year. On the other 345 days, the system could be operated at reduced capacity. HVAC pumps are generally designed for peak conditions and the output of these systems is controlled by mechanically constricting the flow with throttling valves. This wastes energy. By using a variable speed drives, chilled water flows can be matched to actual heating and cooling demands. This 5-hour Quick Book course provides the students with a firm understanding of the basic principles that centrifugal pumps operate under. Topics covered include the performance curve, series operation, parallel operation, the affinity laws, friction, specific gravity & viscosity, suction lift, and NPSH. Learning Objective At the conclusion of this course, the student will: 1.Understand the basic types of pumps used in HVAC applications. 2.Understand the key fluid properties such as viscosity, density, temperature, specific weight, concentration and vapor pressure. 3.Understand why pump performance in typically rated feet of head and not pressure. 4.Understand the various head terms such as suction lift, static head, discharge head, friction head, velocity head and pressure head. 5.Understand the laws of affinity and illustrate them with a pump operating under VFD control. 6.Understand the pump curve, system curve, operating point and the best efficiency point for the pump operation. 7.Understand the flat, smooth and drooping characteristic curve for the centrifugal pump and the applications for which it is best suited. 8.Understand the importance of specific speed and their relationship to the shape of impeller (radial, mixed or axial). 9.Understand pump cavitation and its relationship to net positive suction head (NPSH) available and required. 10.Understand the various techniques for flow control including throttling, speed adjustment and multi-pump installation considerations in parallel or series arrangement. 11.Learn by example the method to compute the frictional head through the HVAC chilled water system. 12.Define the pumping system efficiency and the tips to achieve the same.


Assessing the Energy Efficiency of Pumps and Pump Units

Assessing the Energy Efficiency of Pumps and Pump Units

Author: em. Dr.-Ing Bernd Stoffel

Publisher: Elsevier

Published: 2015-04-10

Total Pages: 159

ISBN-13: 0081006659

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Assessing the Energy Efficiency of Pumps and Pump Units, developed in cooperation with Europump, is the first book available providing the background, methodology, and assessment tools for understanding and calculating energy efficiency for pumps and extended products (pumps+motors+drives). Responding to new EU requirements for pump efficiency, and US DOE exploratory work in setting pump energy efficiency guidelines, this book provides explanation, derivation, and illustration of PA and EPA methods for assessing energy efficiency. It surveys legislation related to pump energy efficiencies, provides background on pump and motor efficiencies, and describes the concept of Energy Efficiency Index (EEI) for circulators and single and multi-pump systems. The first book to cover Europump- sponsored research on energy efficiency in pumps, including coverage of new EU guidelines implemented in January 2015 Discusses Product Approach (PA) and Extended Product Approach (EPA) to assessing energy efficiency Derives and explains the Minimum Efficiency Index (MEI)


Variable Speed Pumping

Variable Speed Pumping

Author: Europump & the Hydraulic Europump & the Hydraulic Insti

Publisher: Elsevier

Published: 2004-06-10

Total Pages: 185

ISBN-13: 0080520464

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Prepared by industry experts from the pump, motor and drive industries under the auspices of Europump and the Hydraulic Institute, this reference book provides a comprehensive guide to variable speed pumping.It includes technical descriptions of pumping systems and their components, and guides the reader through the evaluation of different speed control options.Case studies help illustrate the life cycle cost savings and process improvements that appropriate variable speed pumping can deliver. · Authoritative, global reference to Variable Speed Pumping, by Europump and the Hydraulic Institute· Combines the technical knowledge of pump, motor and control systems in one guide· Brings together all the concepts, metrics and step-by-step decision-making support you need to help you decide which VSD strategies are most appropriate· Will help you design and specify pumping applications that minimise life-cycle costs


Pump Characteristics and Applications, Third Edition

Pump Characteristics and Applications, Third Edition

Author: Michael Volk

Publisher: CRC Press

Published: 2013-10-21

Total Pages: 518

ISBN-13: 1466563087

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Providing a wealth of information on pumps and pump systems, Pump Characteristics and Applications, Third Edition details how pump equipment is selected, sized, operated, maintained, and repaired. The book identifies the key components of pumps and pump accessories, introduces the basics of pump and system hydraulics as well as more advanced hydraulic topics, and details various pump types, as well as special materials on seals, motors, variable frequency drives, and other pump-related subjects. It uses example problems throughout the text, reinforcing the practical application of the formulae and analytical presentations. It also includes new images highlighting the latest generation of pumps and other components, explores troubleshooting options, and incorporates relevant additions into the existing chapters. What’s New in This Edition: Includes more than 150 full-color images which significantly improve the reader’s ability to understand pump drawings and curves Introduces a new chapter on pump case studies in a format that provides case study background, analysis, solutions, and lessons learned Presents important new updates and additions to other chapters Includes a ten-step procedure for determining total pump head Discusses allowable and preferred operating ranges for centrifugal pumps Provides charts covering maximum and normally attainable pump efficiencies, performance corrections for slurry pumps, and mechanical seal flush plans Pump Characteristics and Applications, Third Edition is appropriate for readers with all levels of technical experience, including engineering and pump industry professionals, pump operators and maintenance technicians, upper-level undergraduate and graduate students in mechanical engineering, and students in engineering technology programs.


Pump Characteristics and Applications, Second Edition

Pump Characteristics and Applications, Second Edition

Author: Michael Volk

Publisher: CRC Press

Published: 2005-04-07

Total Pages: 567

ISBN-13: 1420028359

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This hands-on reference offers a practical introduction to pumps and provides the tools necessary to select, size, operate, and maintain pumps properly. It highlights the interrelatedness of pump engineering from system and piping design to installation and startup. This updated second edition expands on many subjects introduced in the first edition and also provides new in-depth discussion of pump couplings, o-rings, motors, variable frequency drives, pump life-cycle cost, corrosion, and pump minimum flow. Written by an acclaimed expert in the field, Pump Characteristics and Applications, Second Edition is an invaluable day-to-day reference for mechanical, civil, chemical, industrial, design, plant, project, and systems engineers; engineering supervisors; maintenance technicians; and plant operators. It is also an excellent text for upper-level undergraduate and graduate students in departments of mechanical engineering, mechanical engineering technology, or engineering technology. About the Author Michael W. Volk, P.E., is President of Volk & Associates, Inc., Oakland, California (www.volkassociates.com), a consulting company specializing in pumps and pump systems. Volk's services include pump training seminars; pump equipment evaluation, troubleshooting, and field testing; expert witness for pump litigation; witnessing of pump shop tests; pump market research; and acquisition and divestiture consultation and brokerage. A member of the American Society of Mechanical Engineers (ASME), and a registered professional engineer, Volk received the B.S. degree (1973) in mechanical engineering from the University of Illinois, Urbana, and the M.S. degree (1976) in mechanical engineering and the M.S. degree (1980) in management science from the University of Southern California, Los Angeles.


Heat Pumps

Heat Pumps

Author: Walter Grassi

Publisher: Springer

Published: 2017-08-11

Total Pages: 180

ISBN-13: 3319621998

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The text describes the main features of currently available heat pumps, focusing on system operation and interactions with external heat sources. In fact, before choosing a heat pump, several aspects must be assessed in detail: the actual climate of the installation site, the building’s energy requirements, the heating system, the type of operation etc. After discussing the general working principles, the book describes the main components of compression machines – for EHPs, GHPs and CO2 heat pumps. It then addresses absorption heat pumps and provides additional details on the behavior of two-fluid mixtures. The book presents a performance comparison for the different types, helping designers choose the right one for their needs, and discusses the main refrigerants. Notes on helpful additional literature, websites and videos, also concerning relevant European regulations, round out the coverage. This book will be of interest to all engineers and technicians whose work involves heat pumps. It will also benefit students in energy engineering degree programs who want to deepen their understanding of heat pumps.


HVAC Pump Handbook

HVAC Pump Handbook

Author: James B. Rishel

Publisher: McGraw-Hill Professional Publishing

Published: 1996

Total Pages: 582

ISBN-13:

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This text discusses the methods and applications of applying pumps and achieving efficient operation in HVAC applications. It aims to provide answers to pumping applications for all types of HVAC applications, including variable speed pumping and piping op


HVAC Pump Handbook, Second Edition

HVAC Pump Handbook, Second Edition

Author: James B. Rishel

Publisher: McGraw Hill Professional

Published: 2010-06-14

Total Pages: 706

ISBN-13: 0071491678

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Design, install, and maintain HVAC pumps Filled with case studies and problem-solving sections, this reference offers HVAC engineers and technicians concrete methods for achieving efficient operation in utilizing the latest digital electronic technologies. Updated to include the latest information ranging from codes to the electronic evolution in HVAC pumping systems


Heat Pumps

Heat Pumps

Author: Charles Nehme

Publisher: Independently Published

Published: 2023-11-09

Total Pages: 0

ISBN-13:

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In the ever-evolving landscape of heating, ventilation, and air conditioning (HVAC) technologies, heat pumps have emerged as a pivotal solution for efficient and sustainable indoor climate control. This document delves into the multifaceted world of heat pumps, exploring their mechanisms, applications, and the significant impact they have on energy efficiency and environmental preservation. As we navigate an era of environmental consciousness and energy conservation, understanding the nuances of heat pump systems becomes increasingly vital. This comprehensive guide aims to provide readers with a deep insight into the diverse facets of heat pumps, ranging from their basic principles to the cutting-edge technological advancements that drive their evolution. The contents of this document are meticulously curated to cater to a broad audience - from homeowners seeking cost-effective heating and cooling options to industry professionals looking to stay abreast of the latest developments in HVAC technologies. Whether you are a novice seeking fundamental knowledge or an expert aiming to broaden your understanding, this document endeavors to serve as a valuable resource. We would like to express our gratitude to the experts, researchers, and professionals in the field of HVAC systems whose contributions have enriched the content of this document. Their insights have played a pivotal role in shaping the comprehensive and accurate information presented here. It is our sincere hope that this document serves as a guiding beacon, illuminating the path toward a more sustainable and energy-efficient future. As we embark on this journey through the realm of heat pumps, we invite readers to explore, learn, and embrace the transformative potential of this innovative technology. Warm regards, Charles Nehme


How to select the proper HVAC equipment to suit your project

How to select the proper HVAC equipment to suit your project

Author: Charles Nehme

Publisher: Charles Nehme

Published:

Total Pages: 141

ISBN-13:

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Preface Selecting the proper HVAC (Heating, Ventilation, and Air Conditioning) equipment for your project is crucial for ensuring energy efficiency, comfort, and cost-effectiveness. This preface will provide an overview of key considerations and steps involved in choosing the right HVAC system for your specific needs. Understanding HVAC Systems HVAC systems are integral to maintaining indoor air quality and thermal comfort. They include components for heating, cooling, ventilation, and humidity control. Common types of HVAC systems include: Split Systems: Separate indoor and outdoor units, ideal for individual room control. Packaged Systems: All-in-one units, typically used in commercial applications. Heat Pumps: Efficient for both heating and cooling, suitable for moderate climates. Ductless Mini-Splits: Offer flexibility without ductwork, ideal for retrofits or specific zones. Key Considerations Project Scope and Requirements: Size and Layout: The size and layout of the space influence the type and capacity of the HVAC system needed. Larger or multi-story buildings may require more complex systems. Usage: Determine the primary use of the space (e.g., residential, commercial, industrial) and any specific needs such as server rooms, labs, or manufacturing areas. Climate: Local climate conditions significantly affect HVAC requirements. Hot and humid climates demand efficient cooling and dehumidification, while colder regions prioritize heating. Energy Efficiency: Look for systems with high Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF) ratings. Energy-efficient systems reduce operating costs and environmental impact. Consider systems with variable speed technology for better energy management. Budget: Balance initial investment with long-term operational costs. High-efficiency systems may have higher upfront costs but lower ongoing expenses. Building Codes and Regulations: Ensure compliance with local building codes, standards, and regulations. This includes safety standards, energy efficiency mandates, and environmental regulations. Indoor Air Quality: Choose systems with good filtration and ventilation capabilities to maintain healthy indoor air quality, especially in spaces with high occupancy or specific air quality requirements. System Design and Integration: Proper design and integration with existing building systems (electrical, plumbing, etc.) are crucial for optimal performance. Consider consulting with HVAC professionals or engineers. Future Scalability: Plan for potential future expansions or modifications. Select systems that can be easily upgraded or expanded. Steps to Select the Proper HVAC Equipment Assess the Building Load: Conduct a load calculation to determine heating and cooling requirements. This includes considering insulation, windows, occupancy, and internal heat gains. Evaluate Different HVAC Systems: Compare various systems based on efficiency, capacity, and suitability for the project's specific needs. Consider Technological Features: Look for modern features such as smart thermostats, zoning capabilities, and remote monitoring for enhanced control and efficiency. Consult with Professionals: Engage HVAC contractors, engineers, or consultants to review your plans and provide expert recommendations. Review Manufacturer Warranties and Support: Choose reputable manufacturers that offer robust warranties and reliable customer support. Conclusion Selecting the proper HVAC equipment is a multifaceted process that requires careful consideration of the project's specific requirements, climate, energy efficiency, and budget. By following a systematic approach and leveraging professional expertise, you can ensure that your HVAC system will provide optimal performance, comfort, and cost-efficiency for your project.