ASHRAE HANDBOOK 2011 PDF

The ASHRAE Technical Committees that prepare these chapters provide new information, clarify existing content, delete obsolete materials, and reorganize chapters to make the Handbook more understandable and easier to use. Other selected highlights include the following: Chapter 1, Psychrometrics, has updates to moist air properties based on ASHRAE research project RP, and a new, more accurate definition of relative humidity for conditions beyond the normal range. Chapter 3, Fluid Flow, has a new example and equations for expansion factor in the section on Compressibility. Chapter 4, Heat Transfer, has three new examples plus two new correlations for single-phase flow in plate heat exchangers.

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The ASHRAE Technical Committees that prepare these chapters provide new information, clarify existing content, delete obsolete materials, and reorganize chapters to make the Handbook more understandable and easier to use. Other selected highlights include the following: Chapter 1, Psychrometrics, has updates to moist air properties based on ASHRAE research project RP, and a new, more accurate definition of relative humidity for conditions beyond the normal range.

Chapter 3, Fluid Flow, has a new example and equations for expansion factor in the section on Compressibility. Chapter 4, Heat Transfer, has three new examples plus two new correlations for single-phase flow in plate heat exchangers. Chapter 5, Two-Phase Flow, has updates for research, plus new correlations for condensation and evaporation of ammonia and carbon dioxide. Chapter 7, Fundamentals of Control, has new content on thermostatic valve actuators, placement of sensors, auxiliary control devices, and network architecture.

Chapter 10, Indoor Environmental Health, has updates on bioaerosols, plus new content on electronic cigarettes and on climate change. Chapter 11, Air Contaminants, has new content on particle sizes and settling times, particulate contaminant effects, polymerase chain reaction PCR measurement, volatility, mercury, e-cigarettes, and 3D printers.

Chapter 14, Climatic Design Information, includes new data for locations worldwide—an increase of locations from the edition of the chapter—as a result of ASHRAE research project RP Chapter 15, Fenestration, has updated discussion on U-factor, solar-optical glazing properties, complex glazings and window coverings, tubular daylighting devices TDDs , and spectrally selective glazing.

Chapter 16, Ventilation and Infiltration, has been updated and revised for clarity throughout, including recent research results on envelope air leakage. Chapter 17, Residential Cooling and Heating Load Calculations, has updates for climate data and current standards. Chapter 18, Nonresidential Cooling and Heating Load Calculations, has new design data for lighting power densities, motors, kitchen equipment, LED lighting, walls and roofs, and an updated example calculation.

Chapter 19, Energy Estimating and Modeling Methods, extensively revised, has new sections on method development history, using models, uncertainty, thermal loads and model inputs, envelope components, HVAC components, terminal components, low-energy systems, natural and hybrid ventilation, daylighting, passive heating, hybrid inverse method, and model calibration.

Chapter 20, Space Air Diffusion, has new content on outlet types and characteristics, air curtains, thermal plumes, and air movement in occupied zones. Also added are content on PEX pipe, plus expanded applications. Chapter 24, Airflow Around Buildings, has new content on flow patterns around building groups and isolated buildings, environmental impacts, pollutant dispersion and exhaust reentrainment, pedestrian wind comfort and safety, and wind-driven rain.

Chapter 28, Combustion and Fuels, has new content on renewable gas, portable combustion analyzers, altitude effects, and combustion-driven oscillation. Chapter 29, Refrigerants, has updated content on new refrigerants and on materials compatibility research. Chapter 34, Energy Resources, has extensive updates for new statistics on worldwide energy use and resources.

Chapter 37, Measurement and Instruments, has updates on nondispersive infrared carbon dioxide detectors; data acquisition and recording; and measuring winding temperature, flow rate, rotative speed moisture content and transfer, and mechanical power. Reader comments are enthusiastically invited. Mark S.

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