Psychrometry is concerned with the measurement of atmospheric
attributes (e.g. temperature, relative humidity, entropy
and enthalpy) that describe the thermodynamic behavior of moist
air (ASHRAE, 2002). Hyland and Wexler (1983) developed formulas
for determining thermodynamic properties of moist air and
water. However, ideal gas relations have been demonstrated to be
valid in the range of 50 to 50 1C with marginal error of less than
0.7% (Kuehn et al., 1998). To propose a dehumidification system
for a particular location, it is necessary to obtain psychrometric
properties of its critical (worst case) point (i.e. the highest
recorded temperature and relative humidity) plus the reasonable
lower range, where the process would be proposed to be feasible.
Psychrometry is concerned with the measurement of atmosphericattributes (e.g. temperature, relative humidity, entropyand enthalpy) that describe the thermodynamic behavior of moistair (ASHRAE, 2002). Hyland and Wexler (1983) developed formulasfor determining thermodynamic properties of moist air andwater. However, ideal gas relations have been demonstrated to bevalid in the range of 50 to 50 1C with marginal error of less than0.7% (Kuehn et al., 1998). To propose a dehumidification systemfor a particular location, it is necessary to obtain psychrometricproperties of its critical (worst case) point (i.e. the highestrecorded temperature and relative humidity) plus the reasonablelower range, where the process would be proposed to be feasible.
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