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Author: Lingshi Wang Publisher: ISBN: Category : Air conditioning Languages : en Pages : 173
Book Description
Secondly, experimental studies on the dehumidification performance of a compact liquid desiccant dehumidifier using structured packing with a high specific surface area (650 m2/m3) are conducted. New empirical equations correlating the moisture effectiveness and the enthalpy effectiveness as well as the heat and mass transfer coefficients with critical inlet parameters are developed. Lewis number during the dehumidification process is also discussed to analyze the coupled heat and mass transfer characteristics. The performance of the present type of packing is compared with other types of packing studied in literature. Besides, the influences of the inlet conditions of the air and the desiccant as well as the packing height on the dehumidification performance are also investigated and compared with the results reported in previous studies, which is valuable for the design of compact liquid desiccant dehumidifiers. Thirdly, the dynamic heat and mass transfer characteristics of a counter-flow packed-type liquid desiccant dehumidifier are studied experimentally. Two types of transient working conditions are tested in experiments: at the beginning of a dehumidification process (by two different scenarios) and the step changes of inlet fluids parameters (inlet air humidity ratio and the solution flow rate). Dynamic responses of the outlet air and desiccant solution as well as dynamic moisture removal rate are displayed and discussed. Fourthly, a simplified one-dimensional dynamic model is also developed for simulating the dynamic characteristics of the counter flow packed-type liquid desiccant dehumidifier. Convenient approaches to quantifying the thermal mass of the packing and the desiccant solution held in the dehumidifier are proposed, which are essential parameters of the dynamic model. Numerical solution for the proposed model is developed. The model is tested and validated experimentally under different transient operating conditions. Finally, the dynamic characteristics of the dehumidifier are investigated by parameter analysis method. Time constants of the dynamic humidity and temperature of outlet air are introduced to evaluate the dynamic response of the dehumidifier. The influences of two operation parameters (i.e. the air flow rate and the solution flow rate) and one configuration parameter (i.e. the height of the packing) on the time constants are analyzed experimentally. Besides, the influences of thermal mass of the dehumidifier on the time constants are also analyzed using the proposed dynamic model.
Author: Lingshi Wang Publisher: ISBN: Category : Air conditioning Languages : en Pages : 173
Book Description
Secondly, experimental studies on the dehumidification performance of a compact liquid desiccant dehumidifier using structured packing with a high specific surface area (650 m2/m3) are conducted. New empirical equations correlating the moisture effectiveness and the enthalpy effectiveness as well as the heat and mass transfer coefficients with critical inlet parameters are developed. Lewis number during the dehumidification process is also discussed to analyze the coupled heat and mass transfer characteristics. The performance of the present type of packing is compared with other types of packing studied in literature. Besides, the influences of the inlet conditions of the air and the desiccant as well as the packing height on the dehumidification performance are also investigated and compared with the results reported in previous studies, which is valuable for the design of compact liquid desiccant dehumidifiers. Thirdly, the dynamic heat and mass transfer characteristics of a counter-flow packed-type liquid desiccant dehumidifier are studied experimentally. Two types of transient working conditions are tested in experiments: at the beginning of a dehumidification process (by two different scenarios) and the step changes of inlet fluids parameters (inlet air humidity ratio and the solution flow rate). Dynamic responses of the outlet air and desiccant solution as well as dynamic moisture removal rate are displayed and discussed. Fourthly, a simplified one-dimensional dynamic model is also developed for simulating the dynamic characteristics of the counter flow packed-type liquid desiccant dehumidifier. Convenient approaches to quantifying the thermal mass of the packing and the desiccant solution held in the dehumidifier are proposed, which are essential parameters of the dynamic model. Numerical solution for the proposed model is developed. The model is tested and validated experimentally under different transient operating conditions. Finally, the dynamic characteristics of the dehumidifier are investigated by parameter analysis method. Time constants of the dynamic humidity and temperature of outlet air are introduced to evaluate the dynamic response of the dehumidifier. The influences of two operation parameters (i.e. the air flow rate and the solution flow rate) and one configuration parameter (i.e. the height of the packing) on the time constants are analyzed experimentally. Besides, the influences of thermal mass of the dehumidifier on the time constants are also analyzed using the proposed dynamic model.
Author: Napoleon Enteria Publisher: Springer ISBN: 9811030472 Category : Technology & Engineering Languages : en Pages : 327
Book Description
This book presents the necessary fundamental knowledge in the research, development, design, selection, and application of desiccant heating, ventilating, and air-conditioning systems. It covers the established installations in different climatic conditions and building types. In addition, advanced performance evaluation techniques are presented, covering thermodynamic, economic, and environmental aspects. Hence, the book is an important resource for undergraduate and graduate students, design and installation engineers, researchers and scientists, building owners and occupants, and energy and environmental policy makers.
Author: Xiaohua Liu Publisher: Springer Science & Business Media ISBN: 3642422225 Category : Technology & Engineering Languages : en Pages : 363
Book Description
Temperature and Humidity Independent Control (THIC) of Air-conditioning System focuses on temperature and humidity independent control (THIC) systems, which represents a new concept and new approach for indoor environmental control. This book presents the main components of the THIC systems, including dehumidification devices, high-temperature cooling devices and indoor terminal devices. Other relevant issues, such as operation and control strategy and case studies, are also included. This book is intended for air-conditioning system designers and engineers as well as researchers working with indoor environments. Xiaohua Liu is an associate professor at the Building Energy Research Center, Tsinghua University, China. Yi Jiang is a member of the Chinese Academy of Engineering, the director of the Building Energy Research Center, Tsinghua University, China and the director of the China-USA Joint Research Center on Clean Energy. Tao Zhang is a Ph.D. candidate at the Building Energy Research Center, Tsinghua University, China.
Author: Publisher: ISBN: Category : Engineering Languages : en Pages : 2264
Book Description
Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Author: Alexander Louis London Publisher: CRC Press ISBN: 9781560320128 Category : Heat exchangers Languages : en Pages : 798
Book Description
Heat exchangers are a crucial part of aerospace, marine, cryogenic and refrigeration technology. These essays cover such topics as complicated flow arrangements, complex extended surfaces, two-phase flow and irreversibility in heat exchangers, and single-phase heat transfer.
Author: Ruzhu Wang Publisher: Woodhead Publishing ISBN: 0081003021 Category : Technology & Engineering Languages : en Pages : 598
Book Description
Advances in Solar Heating and Cooling presents new information on the growing concerns about climate change, the security of energy supplies, and the ongoing interest in replacing fossil fuels with renewable energy sources. The amount of energy used for heating and cooling is very significant, estimated, for example, as half of final energy consumption in Europe. Solar thermal installations have the potential to meet a large proportion of the heating and cooling needs of both buildings and industry and the number of solar thermal installations is increasing rapidly. This book provides an authoritative review of the latest research in solar heating and cooling technologies and applications. - Provides researchers in academia and industry with an authoritative overview of heating and cooling for buildings and industry in one convenient volume - Part III, 'Solar cooling technologies' is contributed by authors from Shanghai Jiao Tong University, which is a world-leader in this area - Covers advanced applications from zero-energy buildings, through industrial process heat to district heating and cooling
Author: David Reay Publisher: Butterworth-Heinemann ISBN: 0080983057 Category : Technology & Engineering Languages : en Pages : 624
Book Description
Process Intensification: Engineering for Efficiency, Sustainability and Flexibility is the first book to provide a practical working guide to understanding process intensification (PI) and developing successful PI solutions and applications in chemical process, civil, environmental, energy, pharmaceutical, biological, and biochemical systems. Process intensification is a chemical and process design approach that leads to substantially smaller, cleaner, safer, and more energy efficient process technology. It improves process flexibility, product quality, speed to market and inherent safety, with a reduced environmental footprint. This book represents a valuable resource for engineers working with leading-edge process technologies, and those involved research and development of chemical, process, environmental, pharmaceutical, and bioscience systems. - No other reference covers both the technology and application of PI, addressing fundamentals, industry applications, and including a development and implementation guide - Covers hot and high growth topics, including emission prevention, sustainable design, and pinch analysis - World-class authors: Colin Ramshaw pioneered PI at ICI and is widely credited as the father of the technology
Author: Valter Silva Publisher: BoD – Books on Demand ISBN: 1789239699 Category : Technology & Engineering Languages : en Pages : 160
Book Description
Most leaders of developed nations recognize the importance of following policies and strategies to achieve a low-carbon economy based on new and innovative technologies that are able to reduce greenhouse gas emissions and create new employment and growth. In the broad spectrum of the feasible decarbonisation pathways, the challenge for political and economic decision-makers is to weigh uncertain impact from different technologies and to build a comprehensive evidence-based framework for research, business, investment and policy decision-making. This book aims to provide the reader with a comprehensive overview of the current state-of-the-art technology in the Low Carbon Technology and Economy field, discussing a set of new technology approaches and environmental and economic implications.
Author: Lingshi Wang
Author: Lingshi Wang
Author: Napoleon Enteria
Author: Xiaohua Liu
Author: 
Author: 
Author: Alexander Louis London
Author: Ruzhu Wang
Author: David Reay
Author: Valter Silva
Author: