Download or read book Dedicated Outdoor Air Systems DOAS written by Charles Nehme and published by Charles Nehme. This book was released on with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the realm of human endeavor, few things are more fundamental to our well-being than the air we breathe. It is the very essence of life, nourishing our bodies and fueling our minds. Yet, the air we encounter indoors often falls short of its potential, becoming stale, polluted, and even hazardous. This is where dedicated outdoor air systems (DOAS) come into play, offering a revolutionary approach to indoor air quality (IAQ). DOAS systems are sophisticated ventilation systems that deliver a continuous supply of fresh, filtered outdoor air to a building's interior. Unlike traditional ventilation systems, which rely on recirculated air, DOAS systems effectively remove stale air while maintaining a comfortable and healthy indoor environment. This is achieved through a combination of advanced heat recovery and filtration technologies that optimize energy efficiency and IAQ. This book is an exploration of the world of DOAS, delving into its principles, applications, and the impact it has on building sustainability and occupant well-being. It aims to provide a comprehensive understanding of DOAS technology, empowering architects, engineers, building managers, and occupants to make informed decisions about indoor air quality. The book begins by defining DOAS and its role in modern HVAC systems. It then delves into the principles of operation, explaining how DOAS systems deliver fresh air, recover energy, and ensure superior IAQ. Subsequent chapters explore design considerations, energy efficiency strategies, control options, and application case studies. The book concludes with a discussion of emerging trends in DOAS technology and its potential to revolutionize the way we manage indoor environments. As we venture into the future of building construction and sustainability, DOAS systems are poised to play an increasingly important role. By providing a continuous supply of fresh, filtered air, they contribute to healthier, more productive, and more sustainable indoor environments. This book serves as a valuable resource for anyone seeking to understand and harness the power of DOAS technology.

Download or read book ASHRAE Design Guide for Dedicated Outdoor Air Systems written by ASHRAE (Firm) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Dedicated outdoor air systems (DOASs) provide HVAC designers with opportunities for advantages in simplicity, efficiency, and economy. This book represents the most complete and up-to-date guidance on the design, installation, and operation and management of DOASs in nonresidential applications. Guided by the information in this book, HVAC system designers will be able to optimally incorporate DOASs into their projects. Architectural designers, building developers and owners, maintenance professionals, students, teachers, and researchers may also find the content useful. Experienced DOAS designers will find this guide helpful in dealing with deviations from the norm, while HVAC designers without DOAS experience will find a complete guide to implementing a DOAS. The guide can be read front to back or in parts, depending on the needs of the designer. Featuring practical checklists, full-color graphics and psychometric charts, and common tips and traps for designers, ASHRAE Design Guide for Dedicated Outdoor Air Systems is an indispensable guide for the working HVAC professional with interest in DOASs"--

Download or read book Dedicated Outdoor Air Systems DOAS written by Charles Nehme and published by Independently Published. This book was released on 2024-01-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the realm of human endeavor, few things are more fundamental to our well-being than the air we breathe. It is the very essence of life, nourishing our bodies and fueling our minds. Yet, the air we encounter indoors often falls short of its potential, becoming stale, polluted, and even hazardous. This is where dedicated outdoor air systems (DOAS) come into play, offering a revolutionary approach to indoor air quality (IAQ). DOAS systems are sophisticated ventilation systems that deliver a continuous supply of fresh, filtered outdoor air to a building's interior. Unlike traditional ventilation systems, which rely on recirculated air, DOAS systems effectively remove stale air while maintaining a comfortable and healthy indoor environment. This is achieved through a combination of advanced heat recovery and filtration technologies that optimize energy efficiency and IAQ. This book is an exploration of the world of DOAS, delving into its principles, applications, and the impact it has on building sustainability and occupant well-being. It aims to provide a comprehensive understanding of DOAS technology, empowering architects, engineers, building managers, and occupants to make informed decisions about indoor air quality. The book begins by defining DOAS and its role in modern HVAC systems. It then delves into the principles of operation, explaining how DOAS systems deliver fresh air, recover energy, and ensure superior IAQ. Subsequent chapters explore design considerations, energy efficiency strategies, control options, and application case studies. The book concludes with a discussion of emerging trends in DOAS technology and its potential to revolutionize the way we manage indoor environments. As we venture into the future of building construction and sustainability, DOAS systems are poised to play an increasingly important role. By providing a continuous supply of fresh, filtered air, they contribute to healthier, more productive, and more sustainable indoor environments. This book serves as a valuable resource for anyone seeking to understand and harness the power of DOAS technology.

Download or read book Energy Benefits of Different Dedicated Outdoor Air Systems Configurations in Various Climates written by Shinan Deng and published by . This book was released on 2014 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dedicated Outdoor Air Systems (DOAS) are proven to be beneficial in many practices. However, not all DOAS configurations under different climates provide the same benefits. This study presents a simulation on evaluating various energy saving benefits of different DOAS configurations among diverse climate zones of commercial buildings in the United States. Three DOAS configurations in a medium office building are simulated in this study: (1) fan-coil units (FCUs) as terminal units with a DOAS unit supplying conditioned outdoor air (OA) to each FCU intake; (2) FCUs with a DOAS unit supplying conditioned OA directly to each occupied space; and (3) a DOAS with active chilled beams. A baseline system consisting of a conventional Variable Air Volume (VAV) system was also simulated for comparison to the three selected DOAS configurations. All simulation inputs are recommended by Department of Energy (DOE) benchmark reference models. Validations of the baseline system and three selected DOAS configurations are based on and compared to previous studies in literature. Building energy simulation results were collected for each system listed above. Additionally, two energy comparisons were performed: each DOAS configuration was compared with the baseline system, and a comparison of each DOAS configuration to the other DOAS configurations was made. Comparison of the simulation results indicates that DOAS energy savings ranged from 7.1% to 26% between the seven simulated locations when compared to simulated baseline with some DOAS configurations performing better in particular climate. The major energy savings are accomplished due to DOAS requiring the exact amount of ventilation for each space and employing high efficiency local Heating, Ventilation, and Air Conditioning (HVAC) units. Suggestions given as a result of this study include: (1) consider supplying the conditioned OA directly to each occupied space with a DOAS in all simulated locations, and (2) consider employing active chilled beams as the local terminal HVAC units in locations which experience extreme hot summers, such as Miami and Phoenix.

Download or read book ASHRAE Design Guide for Dedicated Outdoor Air Systems written by Ashrae and published by . This book was released on 2017 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book represents the most complete guidance on the design, installation, and operation and management of DOAS in nonresidential applications. With this book, any HVAC designer will be able to optimally incorporate a DOAS into their design. Architectural designers, building developers and owners, maintenance professionals, students, teachers, and researchers may also find the contents useful"--

Download or read book ASHRAE Design Guide for Dedicated Outdoor Air Systems written by American Society of Heating, Refrigerating and Air-Conditioning Engineers and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guided by the information in this comprehensive book, HVAC system designers will be able to optimally incorporate DOAS into their projects. --

Download or read book ASHRAE Design Guide for Dedicated Outdoor Air Systems written by and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Résumé : Guided by the information in this comprehensive book, HVAC system designers will be able to optimally incorporate DOAS into their projects. --

Download or read book ASHRAE Design Guide for Dedicated Outdoor Air Systems written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rooftop Unitary Air Conditioner with Integral Dedicated Outdoor Air System written by Tiax Llc and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy use of rooftop and other unitary air-conditioners in commercial applications accounts for about 1 quad (10{sup 15} Btu) of primary energy use annually in the U.S. [Reference 7]. The realization that this cooling equipment accounts for the majority of commercial building cooled floorspace and the majority also of commercial building energy use has spurred development of improved-efficiency equipment as well as development of stricter standards addressing efficiency levels. Another key market driver affecting design of rooftop air-conditioning equipment has been concern regarding comfort and the control of humidity. Trends for increases in outdoor air ventilation rates in certain applications, and the increasing concern about indoor air quality problems associated with humidity levels and moisture in buildings points to a need for improved dehumidification capability in air-conditioning equipment of all types. In many cases addressing this issue exacerbates energy efficiency, and vice versa. The integrated dedicated outdoor air system configuration developed in this project addresses both energy and comfort/humidity issues.

Download or read book Air Conditioning System Design written by Roger Legg and published by Butterworth-Heinemann. This book was released on 2017-06-15 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air Conditioning System Design summarizes essential theory and then explains how the latest air conditioning technology operates. Load calculations, energy efficiency, and selection of technology are all explained in the context of air conditioning as a system, helping the reader fully consider the implications of design decisions. Whether users need to figure out how to apply their mechanical engineering degree to an air conditioning design task or simply want to find out more about air conditioning technology for a research project, this book provides a perfect guide. Approaches air conditioning as a system, not just a collection of machines Covers the essential theory on fluid flow and the latest in A/C technology in a very readable and easy-to-use style Explains the significance of factors, such as climate and thermal comfort as A/C design considerations Addresses design using a range of air conditioning technologies, such as evaporative cooling, VRF systems, psychromatic software, and dessicant dehumidification

Download or read book Initial Evaluation of Displacement Ventilation and Dedicated Outdoor Air Systems of U S Commercial Buildings written by Steven John Emmerich and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Initial Evaluation of Displacement Ventilation and Dedicated Outdoor Air Systems of U S Commercial Buildings written by Steven John Emmerich and published by . This book was released on 2005 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hotel HVAC Design Guide written by Charles Nehme and published by Charles Nehme. This book was released on with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hotels rely on efficient HVAC systems to ensure the comfort of their guests. HVAC (Heating, Ventilation, and Air Conditioning) systems are used to control the temperature, humidity, and air quality of a hotel's interior environment. By regulating a hotel's indoor environment, HVAC systems help to create a more comfortable and healthy atmosphere for guests. Hotels typically use a combination of heating and cooling systems to maintain the desired temperature in each room. Heating systems like furnaces, boilers, and heat pumps are used to warm the air during colder months, while cooling systems like air conditioners and evaporative coolers are used to cool the air in warmer months. In addition, ventilation systems are used to bring in fresh outdoor air and filter out airborne pollutants. HVAC systems in hotels must be designed and maintained to meet the specific needs of the hotel. Factors such as the size of the hotel, the number of rooms, and the climate of the local area all need to be taken into account when designing an HVAC system. It is also important to ensure that the HVAC system is energy-efficient, as this can help reduce both energy costs and the hotel's environmental impact. Hotels also rely on HVAC systems to filter out airborne pollutants, such as dust, pollen, and other allergens. Air filters and purifiers help to clean the air of these particles, helping to reduce the risk of guests developing allergies or other respiratory illnesses. Finally, the HVAC system in a hotel plays an important role in controlling humidity levels. Low humidity levels can cause guests to feel uncomfortable or even sick, while high humidity levels can lead to mold and mildew growth. By regulating humidity levels, HVAC systems help to create a more comfortable and healthy environment for guests.

Download or read book Evaluation of Commissioning Methods on Building Automation System of Dedicated Outdoor Air System written by Cheng, Xi and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Automation Systems (BAS) are widely used in large commercial buildings to assist in the management of the building HVAC system. The purpose is to replace manual operation with automatic operation, improve indoor air comfort, and to reduce energy consumption through improved control strategies. One reason for lack of energy conservation for BASis that the settings in building automation system are not optimized according to the operation building system condition and load requirements. To address this issue, studies focused on commissioning for BAS, which can be called building re-tuning, have been developed by PNNL to provide optimized solutions for building operators. However, the building re-tuning solutions having been promoted are mainly for the Variable Air Volume system, problems may persist when the BAS for a different type of system needs to be commissioned, for example a Dedicated Outdoor Air System (DOAS). The air handling process for DOAS is very different from the process for a VAV system, despite the fact that DOAS is also widely implemented in commercial buildings.In order to address these issue, this project focuses on the evaluation of effectiveness of the common VAV BAS commissioning measures to the Dedicated Outdoor Air System. The main research method is modeling with the EnergyPlus program. Baseline models with DOAS and fan coil system have been built in this study, and 6 types of commissioning measures are implemented and compared with the base models. The energy performance for the commissioning measures are simulated in 16 different locations in the U.S. Finally, the analysis will be based on the comparison between the effectiveness of measures in different climates, between a VAV system and a DOAS, as well as comparison between DOAS unit and parallel cooling system.This document includes a literature review on commissioning and DOAS, a case study for commissioning a DOAS, and the energy modeling process for this study. The result of modeling and the detailed coding about the commissioning measures are also presented.

Download or read book Heating Ventilating and Air Conditioning written by Faye C. McQuiston and published by John Wiley & Sons. This book was released on 2023-08-14 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heating, Ventilating, and Air Conditioning The authoritative resource providing coverage of all aspects of HVAC, fully updated to align with the latest HVAC technologies and methods Now in its Seventh Edition, Heating, Ventilating, and Air Conditioning has been fully updated to align with the latest technologies and industry developments while maintaining the balance of theoretical information with practical applications that has prepared many generations of students for their careers. As they work through the book, students will become familiar with different types of heating and air conditioning systems and equipment, understand processes and concepts involving moist atmospheric air, learn how to provide comfort to occupants in controlled spaces, and gain practice calculating probable heat loss/gain and energy requirements. A companion website includes additional multiple-choice questions, tutorial videos showing problem-solving for R-value calculation, and Excel spreadsheets that can be used for practice calculations. The Seventh Edition includes new coverage of ductless A/C systems, heat exchangers and hybrid heat pumps, geothermal heat pumps, energy-efficient equipment, and UV principles of air quality treatment of airborne viruses like COVID-19. Heating, Ventilating, and Air Conditioning includes detailed coverage of topics such as: Common HVAC units and dimensions, fundamental physical concepts, and system selection and arrangement Types of all-air systems, air-and-water systems, all-water systems, and decentralized cooling and heating Moist air and the standard atmosphere, fundamental parameters, adiabatic saturation, and wet bulb temperature and the psychrometric chart Outdoor and indoor design conditions, transmission heat losses, infiltration, heat losses from air ducts, auxiliary heat sources, and intermittently heated structures Heat gain, cooling load, and heat extraction rate, and application of cooling load calculation procedures Selection of pumps and fans, and duct HVAC sizing Heating, Ventilating, and Air Conditioning helps prepare students for the industry by connecting the content to ASHRAE standards and by introducing coverage of software tools commonly used in HVAC design. The text is suitable for one- or two-semester HVAC courses taught at junior to graduate levels in various engineering departments.

Download or read book Net Zero Energy Buildings NZEB written by Shady Attia and published by Butterworth-Heinemann. This book was released on 2018-03-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Net Zero Energy Buildings (NZEB): Concepts, Frameworks and Roadmap for Project Analysis and Implementation provides readers with the elements they need to understand, combine and contextualize design decisions on Net Zero Energy Buildings. The book is based on learned lessons from NZEB design, construction, operation that are integrated to bring the most relevant topics, such as multidisciplinarity, climate sensitivity, comfort requirements, carbon footprints, construction quality and evidence-based design. Chapters introduce the context of high performance buildings, present overviews of NZEB, cover the performance thresholds for efficient buildings, cover materials, micro-grid and smart grids, construction quality, performance monitoring, post occupancy evaluation, and more. Offers a roadmap for engaging in energy efficiency in high performance buildings projects Combines solid grounding in core concepts, such as energy efficiency, with a wider context that includes the technical, socio-cultural and environmental dimensions Covers key areas for decision-making Provides a logical framework to analyze projects in the context of environmental change Presents worldwide examples and cases for different climates and societies

Download or read book Renewable Energy for Sustainable Growth Assessment written by Nayan Kumar and published by John Wiley & Sons. This book was released on 2022-02-24 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: RENEWABLE ENERGY FOR SUSTAINABLE GROWTH ASSESSMENT Written and edited by a team of experts in the field, this collection of papers reflects the most up-to-date and comprehensive current state of renewable energy for sustainable growth assessment and provides practical solutions for engineers and scientists. Renewable energy resources (RERs) are gaining more attention in academia and industry as one of the preferred choices of sustainable energy conversion. Due to global energy demand, environmental impacts, economic needs and social issues, RERs are encouraged and even funded by many governments around the world. Today, researchers are facing numerous challenges as this field emerges and develops, but, at the same time, new opportunities are waiting for RERs utilization in sustainable development all over the globe. Efficient energy conversion of solar, wind, biomass, fuel cells, and other techniques are gaining more popularity and are the future of energy. The present book cross-pollinates recent advances in the study of renewable energy for sustainable growth. Various applications of RERs, modeling and performance analysis, grid integration, soft computing, optimization, artificial intelligence (AI) as well as machine and deep learning aspects of RERs are extensively covered. Whether for the veteran engineer or scientist, the student, or a manager or other technician working in the field, this volume is a must-have for any library. This outstanding new volume Assesses the current and future need for energy on a global scale and reviews the role of renewable energy Includes multiple chapters on biomass and bioenergy Also includes multiple chapters on solar energy and PVs Also includes chapters on fuel cells, wind power, and many other topics Covers the design and implementation of power electronics for energy systems Outlines best practices and the state of the art for renewable energy with regard to sustainability Audience: Engineers, scientists, technicians, managers, students, and faculty working in the field of renewable energy, sustainability and power system