The variable speed control of the chilled water pumps achieves an additional chilled water plant. power savings of around 5% [2]. These systems put even more demands on the variable speed chiller control. system, while not affecting the fixed-speed control system at all. However, the difference in compressor map.
The density of dry air can be calculated using the ideal gas law, expressed as a function of temperature and pressure: where: The specific gas constant for dry air is 287.058 J/(kgÂ·K) in SI units, and 53.35 (ftÂ·lbf)/(lbmÂ·Â°R) in United States customary and Imperial units. This quantity may vary slightly depending on the molecular composition of air at a particular location.
For most gases at temperatures near (or above) room temperature (298 K = 25o C) and near (or below) room pressure (1 atm = 760 torr), the ideal gas law adequately describes the behavior of the gas: Where R = 0.08206 L atm mol-1K-1 is a constant of nature called the ideal gas constant.