Abstract for ASHRAE Fundamentals Handbook Chapter 11 Air Contaminants
Chapter 11, Air Contaminants, appears in the ASHRAE Fundamentals Handbook. Its intent is to help engineers understand air contaminants, both particulate and gaseous, and to provide information to help them deal with problems related to contaminant presence in buildings. The chapter contains mainly educational material.
The section on particles covers types, size ranges, units and measurement methods. It also deals with bioaerosols (mainly molds and bacteria).
The gaseous contaminant section includes basic information on chemical classes, properties such as volatility, sources, units, and measurement methods. Special attention is paid to volatile organic compounds (VOCs) and important gaseous inorganic pollutants.
The chapter also addresses classes of contaminants that have some common characteristics such as a source or regulatory framework. These include outdoor air contaminants, industrial and non-industrial indoor air contaminants, flammable gases and vapors, combustible dusts, radioactive air contaminants, and soil gases.
Abstract for ASHRAE HVAC Applications Handbook Chapter 46 Control of Gaseous Indoor Air Contaminants
Chapter 46, Control of Gaseous Indoor Air Contaminants, appears in the ASHRAE HVAC Applications Handbook. Its intent is both to help engineers to understand the processes that remove gaseous contaminants from air and to provide information that enables engineers to design and specify gaseous contaminant air cleaners for HVAC systems.
The principal gas removal processes, physical adsorption and chemisorption, are characterized and their terminology explained. Sample source emission data is shown with advice on using it to predict contaminant concentrations in buildings. Information is given on selecting the removal processes appropriate for different contaminant types and occupied spaces and on sizing duct-mounted gaseous air cleaners.
The chapter also covers air-cleaning system design, installation, start-up, commissioning, safety issues, operations and maintenance, and methods of test for efficiency and service life.