This book discusses the development, types and application principles of portable air purifiers in China. It analyzes the theoretical characteristics of air purifiers under various operational conditions, and points out that the term "Clean Air Delivery Rate" cannot be used to precisely reflect the problems that occur under various operational conditions. By comparing theoretical and measured data, it highlights the mainfeatures of air purifiers and key points in the design process for different applications. Calculation methods for the indoor particle concentration and the self-purification time are also provided. The book describes the conditions for window opening in smog and for selecting air purifiers, and proposes a newmethod for improvingtheir measurement. In closing, it includes a new assessment index.
This book discusses the development, types and application principles of portable air purifiers in China. It analyzes the theoretical characteristics of air purifiers under various operational conditions, and points out that the term "Clean Air Delivery Rate" cannot be used to precisely reflect the problems that occur under various operational conditions. By comparing theoretical and measured data, it highlights the mainfeatures of air purifiers and key points in the design process for different applications. Calculation methods for the indoor particle concentration and the self-purification time are also provided. The book describes the conditions for window opening in smog and for selecting air purifiers, and proposes a newmethod for improvingtheir measurement. In closing, it includes a new assessment index.
Bad Decisions Waste 40 Percent of Our Day. Here’s What to Do about It.In developing nations, 40 percent of drinkable water is lost. Infrastructure breaks. Pipes leak. People cut into water lines to...
In 2000, a transformative climate-driven "megadrought" swept over the Colorado River watershed. By the early 2020s, levels on the river's two largest reservoirs were hitting record lows and...
Crystee Daveen is an eleven-year-old girl who has a very special bond with her spirit guide, Zareena. They communicate by heart and go on amazing cosmic adventures together. In this book, The...
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