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CHAPTER 64 INDOOR ENVIRONMENTAL CONTROL Jerald D. Parker F. C. McQuiston Professors Emeritus Oklahoma State University Stillwater, Oklahoma 64.1 MOIST AIR PROPERTIES AND CONDITIONING PROCESSES 64.1.1 Properties of Moist Air 64.1.2 The Psychrometric Chart 64.1.3 Space Conditioning Processes 64.1.4 Human Comfort SPACEHEATING 64.2.1 Heat Transmission in Structures 64.2.2 Design Conditions 64.2.3 Calculation of Heat Losses 64.2.4 Air Requirements 64.2.5 Fuel Requirements SPACECOOLING 64.3.1 Heat Gain, Cooling Load, and Heat Extraction Rate . | CHAPTER 64 INDOOR ENVIRONMENTAL CONTROL Jerald D. Parker F. C. McQuiston Professors Emeritus Oklahoma State University Stillwater Oklahoma 64.1 MOIST AIR PROPERTIES 64.3.2 Design Conditions 1989 AND CONDITIONING PROCESSES 64.1.1 Properties of Moist Air 64.1.2 The Psychrometric Chart 64.1.3 Space Conditioning Processes 64.1.4 Human Comfort 1973 1973 1974 1975 1979 64.4 64.3.3 Calculation of Heat Gains 64.3.4 Air Requirements 64.3.5 Fuel Requirements AIR-CONDITIONING EQUIPMENT 64.4.1 Central Systems 64.4.2 Unitary Systems 1989 1990 1991 1991 1991 1995 64.2 SPACE HEATING 64.2.1 Heat Transmission in Structures 64.2.2 Design Conditions 64.2.3 Calculation of Heat Losses 64.2.4 Air Requirements 64.2.5 Fuel Requirements 1982 1982 1985 1986 1987 1987 64.5 64.6 64.4.3 Heat Pump Systems ROOM AIR DISTRIBUTION 64.5.1 Basic Considerations 64.5.2 Jet and Diffuser Behavior BUILDING AIR DISTRIBUTION 1996 1997 1997 1998 2000 64.3 SPACE COOLING 64.3.1 Heat Gain Cooling Load and Heat Extraction Rate 1988 1988 64.6.1 Fans 64.6.2 Variable-Volume Systems 2000 2003 64.1 MOIST AIR PROPERTIES AND CONDITIONING PROCESSES 64.1.1 Properties of Moist Air Atmospheric air is a mixture of many gases plus water vapor and countless pollutants. Aside from the pollutants which may vary considerably from place to place the composition of the dry air alone is relatively constant varying slightly with time location and altitude. In 1949 a standard composition of dry air was fixed by the International Joint Committee on Psychrometric Data as shown in Table 64.1.1 Table 64.1 Composition of Dry Air7 Constituent Molecular Mass Volume Fraction Oxygen 32.000 0.2095 Nitrogen 28.016 0.7809 Argon 39.944 0.0093 Carbon dioxide 44.010 0.0003 Mechanical Engineers Handbook 2nd ed. Edited by Myer Kutz. ISBN 0-471-13007-9 1998 John Wiley Sons Inc. 1973 1974 INDOOR ENVIRONMENTAL CONTROL The molecular mass M of dry air is 28.965 and the gas constant R is 53.353 ft Ibf lbm R or 287 J kg K. The basic medium