Best Practice for Energy Efficient Cleanrooms

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ISBN 13 :
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Book Synopsis Best Practice for Energy Efficient Cleanrooms by : Tengfang Xu

Download or read book Best Practice for Energy Efficient Cleanrooms written by Tengfang Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cleanroom air-recirculation systems typically account for a significant portion of the HVAC energy use in cleanrooms. High electric power density is normally required for fans to deliver large volume of airflows that were designed, supplied, recirculated, and exhausted within a given time. With the increasing demand for specific contamination control, it is important to optimize design of clean spaces. Best practice in cleanroom air system design includes right-sizing the systems in cleanrooms and adopting minienvironments. Implementing and integrating minienvironments in cleanrooms can improve contamination control and save significant energy. A minienvironment is a localized environment created by an enclosure to isolate a product or process from the surrounding environment. The advantages in using minienvironments include the following: (1) Minienvironments may create better contamination control and process integration. (2) Minienvironments may maintain better contamination control by better control of pressure difference or through use of unidirectional airflows, e.g., cleanliness-class upgrade required for certain process. (3) Minienvironments may potentially reduce energy costs. The use of fan-filter units (FFU) in minienvironments is common. The energy efficiency of such air-delivery systems can vary significantly because of the difference in energy performance, airflow paths, and operating conditions. Simply adding minienvironments with fan-filter units in an existing cleanroom will increase power density and energy intensity for delivering airflow in the space served, if everything else is unchanged. However, by considering contamination control requirements in the various spaces minienvironments can be integrated with the surrounding cleanroom to optimize the overall electric power demand for the facility and to achieve specific cleanliness in each area. In addition, selecting energy efficient minienvironment systems will further improve the overall energy efficiency of the clean spaces.

Best Practice for Energy Efficient Cleanrooms

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ISBN 13 :
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Book Synopsis Best Practice for Energy Efficient Cleanrooms by : Tengfang Xu

Download or read book Best Practice for Energy Efficient Cleanrooms written by Tengfang Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Best Practice for Energy Efficient Cleanrooms

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Best Practice for Energy Efficient Cleanrooms by : Tengfang Xu

Download or read book Best Practice for Energy Efficient Cleanrooms written by Tengfang Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Best Practice for Energy Efficient Cleanrooms

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Best Practice for Energy Efficient Cleanrooms by : Tengfang Xu

Download or read book Best Practice for Energy Efficient Cleanrooms written by Tengfang Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The HVAC systems in cleanrooms may use 50 percent or more of the total cleanroom energy use. Fan energy use accounts for a significant portion (e.g., over 50%) of the HVAC energy use in cleanrooms such as ISO Classes 3, 4, or 5. Three types of air-handling systems for recirculating airflows are commonly used in cleanrooms: (1) fan-tower systems with pressurized plenum, (2) ducted HEPA systems with distributed-fans, and (3) systems with fan-filter units. Because energy efficiency of the recirculation systems could vary significantly from system type to system type, optimizing aerodynamic performance in air recirculation systems appears to be a useful approach to improve energy efficiency in cleanrooms. Providing optimal airflows through careful planning, design and operation, including air change rate, airflow uniformity, and airflow speed, is important for controlling particle contamination in cleanrooms. In practice, the use of fan-filter units (FFUs) in the air-handling system is becoming more and more popular because of this type of system may offer a number of advantages. Often modular and portable than traditional recirculation airflow systems, FFUs are easier to install, and can be easily controlled and monitored to maintain filtration performance. Energy efficiency of air handling systems using fan-filter units can, however, be lower than their counterparts and may vary significantly from system to system because of the difference in energy performance, airflow paths, and the operating conditions of FFUs.

Best Practices for Energy Efficient Cleanrooms Efficient HVACSystems

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Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Best Practices for Energy Efficient Cleanrooms Efficient HVACSystems by :

Download or read book Best Practices for Energy Efficient Cleanrooms Efficient HVACSystems written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Best Practicefor Energy Efficient Cleanrooms

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Best Practicefor Energy Efficient Cleanrooms by : Tengfang Xu

Download or read book Best Practicefor Energy Efficient Cleanrooms written by Tengfang Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cleanroom energy benchmarking data shows that chiller plant designs and operating efficiencies varied significantly from cleanroom to cleanroom. While system optimization is critical to the overall energy efficiency of chiller plants, the operating efficiency of chilled water and condenser pumps, along with chiller efficiency and cooling tower efficiency, is a major factor in the overall system efficiency. The design and operating efficiency of water pumps directly affects energy use for such facilities. Figure 1 shows benchmarked HVAC energy end use in a semiconductor cleanroom facility. In this case, the water pumps collectively accounted for 17% of the total energy use. Figure 2 shows the electric power demand of the components in a chiller plant system. Pumps accounted for 18% of the total power demand for the whole chiller plant. It is important to design, select, operate, and control water-pumping systems to achieve high efficiency and to lower life-cycle costs for cleanrooms and their adjacent spaces.

Cleanroom Energy. Code of Practice for Improving Energy Efficiency in Cleanrooms and Clean Air Devices

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ISBN 13 : 9780580742675
Total Pages : 36 pages
Book Rating : 4.7/5 (426 download)

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Book Synopsis Cleanroom Energy. Code of Practice for Improving Energy Efficiency in Cleanrooms and Clean Air Devices by : British Standards Institute Staff

Download or read book Cleanroom Energy. Code of Practice for Improving Energy Efficiency in Cleanrooms and Clean Air Devices written by British Standards Institute Staff and published by . This book was released on 1913-03-31 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clean rooms, Communicable disease control, Environmental cleanliness, Rooms, Waste handling, Air cleaning equipment, Air treatment devices, Maintenance, Cleaning, Classification systems, Contamination, Qualification approval, Leak tests, Performance testing, Access, Air-distribution systems, Design, Installation, Environment (working), Instructions for use

Efficient Airflow Design for Cleanrooms Improves Business Bottom Lines

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ISBN 13 :
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Book Synopsis Efficient Airflow Design for Cleanrooms Improves Business Bottom Lines by : Tengfang Xu

Download or read book Efficient Airflow Design for Cleanrooms Improves Business Bottom Lines written by Tengfang Xu and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a review of airflow design factors and in-situ energy measurements in ISO Cleanliness Class-5 cleanrooms, this paper addresses the importance of energy efficiency in airflow design and opportunities of cost savings in cleanroom practices. The paper discusses design factors that can long lastingly affect cleanroom system performance, and demonstrates benefits of energy efficient cleanroom design from viewpoints of environmental control and business operations. The paper suggests that a high performance cleanroom should not only be effective in contamination control, but also be efficient in energy and environmental performance. The paper also suggests that energy efficient design practice stands to bring in immediate capital cost savings and operation cost savings, and should be regarded by management as a strategy to improve business bottom lines.

Energy Performance of Cleanroom Environmental Systems

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ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Energy Performance of Cleanroom Environmental Systems by :

Download or read book Energy Performance of Cleanroom Environmental Systems written by and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: By developing metrics for evaluating cleanroom air system performance and overall load intensity, this paper provides energy benchmarking results for thirteen cleanroom environmental system performance, and identifies opportunities for improving cleanroom energy efficiency while maintaining or improving cleanroom contamination control. Comparisons with IEST Recommended Practice are made to examine the performance of cleanroom air systems. These results can serve as a vehicle to identify energy efficient cleanroom design practices and to highlight important issues in cleanroom operation and maintenance. Results from this study confirm that there are opportunities in improving energy efficiency of cleanroom environmental systems while maintaining effective contamination control.

Clean Rooms for Electronic Manufacturers: Ensuring Precision and Reliability in Controlled Environments

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Publisher : Charles Nehme
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4./5 ( download)

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Book Synopsis Clean Rooms for Electronic Manufacturers: Ensuring Precision and Reliability in Controlled Environments by : Charles Nehme

Download or read book Clean Rooms for Electronic Manufacturers: Ensuring Precision and Reliability in Controlled Environments written by Charles Nehme and published by Charles Nehme. This book was released on with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fast-evolving world of electronics manufacturing, the role of clean rooms cannot be overstated. These controlled environments are essential for producing high-quality, reliable electronic components and devices, which are integral to nearly every aspect of modern life—from consumer electronics to medical devices, automotive systems, and aerospace technology. The primary function of a clean room is to minimize the introduction, generation, and retention of particles within the space. This is crucial because even microscopic contaminants can significantly impact the performance, reliability, and longevity of electronic components. Clean rooms are designed to maintain extremely low levels of particulate matter, achieved through stringent control over air filtration, pressure, temperature, and humidity. Importance of Clean Rooms in Electronics Manufacturing Contamination Control: Electronic components, particularly semiconductors, are highly sensitive to dust, bacteria, and other airborne particles. Clean rooms ensure that these contaminants are kept at bay, protecting the integrity of the manufacturing process. Quality Assurance: The use of clean rooms helps in maintaining the high standards required in electronics manufacturing. This translates to fewer defects, higher yields, and better performance of the final products. Compliance with Standards: Many sectors, especially those involving medical devices and aerospace technology, have stringent regulatory requirements. Clean rooms help manufacturers comply with these standards, ensuring that their products are safe and reliable. Innovation and Precision: Advanced electronics manufacturing often involves nanotechnology and microelectronics, where precision is paramount. Clean rooms provide the controlled environment necessary for such high-precision work. Key Elements of a Clean Room Air Filtration Systems: High-Efficiency Particulate Air (HEPA) filters and Ultra-Low Penetration Air (ULPA) filters are used to remove particles from the air, ensuring that the environment remains contaminant-free. Controlled Environment: Parameters such as temperature, humidity, and pressure are meticulously controlled to prevent any adverse effects on the manufacturing process. Clean Room Classifications: Clean rooms are classified based on the number and size of particles permitted per volume of air. The most common classification standards are those of the International Organization for Standardization (ISO). Personnel and Equipment Protocols: Strict protocols for personnel, including the use of special clothing and hygiene practices, are essential. Similarly, equipment used in clean rooms is designed to minimize the generation of particles. Challenges and Considerations Cost: Establishing and maintaining clean rooms is expensive. This includes the cost of sophisticated filtration systems, environmental controls, and regular maintenance. Training: Personnel working in clean rooms require extensive training to understand and adhere to strict protocols. Technology Upgrades: As technology advances, clean rooms must be regularly updated to meet new standards and accommodate new manufacturing processes. Conclusion Clean rooms are indispensable in the realm of electronics manufacturing. They play a critical role in ensuring that the components and devices produced meet the highest standards of quality and reliability. As the industry continues to innovate and evolve, the importance of clean rooms will only grow, making them a cornerstone of modern manufacturing processes.

נחמיה

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (754 download)

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Book Synopsis נחמיה by :

Download or read book נחמיה written by and published by . This book was released on 1912 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Considerations for Efficient Airflow Design in Cleanrooms

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Considerations for Efficient Airflow Design in Cleanrooms by :

Download or read book Considerations for Efficient Airflow Design in Cleanrooms written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-performance cleanroom should provide efficient energy performance in addition to effective contamination control. Energy-efficient designs can yield capital and operational cost savings, and can be part of a strategy to improve productivity in the cleanroom industry. Based upon in-situ measurement data from ISO Class 5 clean rooms, this article discusses key factors affecting cleanroom air system performance and benefits of efficient airflow design in clean rooms. Cleanroom HVAC systems used in the semiconductor, pharmaceutical, and healthcare industries are very energy intensive, requiring large volumes of cleaned air to remove or dilute contaminants for satisfactory operations. There is a tendency, however, to design excessive airflow rates into cleanroom HVAC systems, due to factors such as design conservatism, lack of thorough understanding of airflow requirements, concerns about cleanliness reliability, and potential design and operational liabilities. Energy use of cleanroom environmental systems varies with system type and design, cleanroom functions, and the control of critical parameters such as temperature and humidity. In particular, cleanroom cleanliness requirements specified by cleanliness class have an impact on overall energy use. A previous study covering Europe and the US reveals annual cleanroom electricity usage for cooling and fan energy varies significantly depending on cleanliness class, and may account for up to three-quarters of total annual operating costs. A study on a semiconductor cleanroom in Japan found air delivery systems account for more than 30% of total power consumption. It is evident that the main factors dictating cleanroom operation energy include airflow rates and HVAC system efficiency. Improving energy efficiency in clean rooms may potentially contribute to significant savings in the initial costs of the facilities as well as operation and maintenance costs. For example, energy consumption by a typical chip manufacturer can be cut 40% or more, and the associated greenhouse emissions even more. Cleanroom HVAC systems provide huge opportunities for energy savings in the semiconductor industry. In addition to direct cost reductions in cleanroom investment and operation, energy-efficient designs can reduce maintenance costs, increase power reliability, improve time-to-market in cleanroom production, and improve environmental quality. Companies that use energy efficiency to lower costs and increase productivity can gain a competitive advantage and achieve a higher return on investment. In addition, energy-efficient cleanroom systems conserve energy and natural resources, heightening the company's reputation as an environmentally conscious leader in the community and the industry. A significant portion of energy use in cleanroom environmental systems is associated with recirculating air systems. We will review and analyze design factors and operational performance of airflow systems in ISO Class 5 clean rooms. We will also discuss benefits of efficient cleanroom airflow designs in conjunction with effective cleanroom contamination control. We will consider the following common recirculating air system designs: fan-tower (FT) with pressurized-plenum; distributed air handler unit (AHU); and fan-filter unit (FFU).

An Energy Efficiency Guide for Use in Cleanroom Programming

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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (685 download)

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Book Synopsis An Energy Efficiency Guide for Use in Cleanroom Programming by :

Download or read book An Energy Efficiency Guide for Use in Cleanroom Programming written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide was developed to provide ideas for considering energy efficiency in the early stages of a cleanroom design project. Use of this guide will facilitate selection of design features that will improve energy efficiency in cleanrooms. Cleanroom owners and designers can use the guide to focus on energy intensive items in the design of a cleanroom facility.

CleanRooms

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ISBN 13 :
Total Pages : 68 pages
Book Rating : 4./5 ( download)

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Book Synopsis CleanRooms by :

Download or read book CleanRooms written by and published by . This book was released on 2008-02 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A central resource of technology and methods for environments where the control of contamination is critical.

Energy Conservation in the Dry-cleaning Industry

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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (96 download)

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Book Synopsis Energy Conservation in the Dry-cleaning Industry by : Energy Efficiency Best Practice Programme (Great Britain).

Download or read book Energy Conservation in the Dry-cleaning Industry written by Energy Efficiency Best Practice Programme (Great Britain). and published by . This book was released on 1993 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CleanRooms

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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4./5 ( download)

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Book Synopsis CleanRooms by :

Download or read book CleanRooms written by and published by . This book was released on 2009-01 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A central resource of technology and methods for environments where the control of contamination is critical.

Energy-efficient High-tech Buildings

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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Energy-efficient High-tech Buildings by : William Tschudi

Download or read book Energy-efficient High-tech Buildings written by William Tschudi and published by . This book was released on 2008 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: