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.
The specific gravity (Î³ g) of a gas mixture is the ratio of the density of the gas mixture to that of air. It is measured easily at the wellhead in the field and therefore is used as an indication of the composition of the gas.