While equation-based object-oriented modeling language Modelica can evaluate practical energy improvements for district cooling systems, few have adopted this type of large-scale thermo-fluid system. Further, to our best knowledge, studies yet include hydraulics in piping networks alongside plant models featuring realistic mechanical systems and controls. These are critical details when looking...

When a refrigeration plant operates with a large difference between condensing and evaporating pressures, multistage operation is required to obtain an acceptable performance. In two-stage systems, vessels that combine flash-gas removal and intercooling are commonly used. The disadvantage of these vessels is the large amount of refrigerant required for proper operation. An alternative for these...

Some positive displacement (PD) compressors are equipped with automatic discharge valves such as reed that open automatically whenever the cavity pressure is slightly larger than outlet to deal effectively varying ratio applications. Screw today do not have valves, resulting in off-design conditions known under-compression or over-compression when at deviating from pressure. Compressor efficien...

At present, the exhaust gas temperature of coal-fired power plants is 125-150℃, and emission high-temperature flue causes loss excess heat wastes. For this kind phenomenon, waste recovery system researched designed, combined with combination a low-temperature economizer in plant Dezhou. The heater, through heater system, reduces coal consumption for generation, emissions, while reducing dust sp...