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.
Speed of sound in ideal gases and air. 1  cideal is the speed of sound in an ideal gas; 2  R (approximately 8.314,5 J Â· molâ1 Â· Kâ1) is the molar gas constant(universal gas constant); 3  k is the Boltzmann constant; 4  Î³ (gamma) is the adiabatic index.