Search

One of the reserves for improving the efficiency of air conditioning systems (ACS) is to enable the operation of refrigeration compressors in nominal or close modes. Generally, the overall range of current heat loads of any ACS includes the range of unstable heat loads, associated with precooling of ambient air with significant fluctuations in heat loads, and a comparatively stable range when cooling air from a certain intermediate (threshold) temperature to a target value. Obviously, a stable range of heat load can be covered by the operation of a conventional compressor in closed to nominal mode, while ambient air precooling requires regulation of cooling capacity. To prove the effectiveness of proposed method of designing the performance of ACS has been analyzed in climatic conditions of Ukraine and Kazakhstan. [ABSTRACT FROM AUTHOR]

The air cooling at the inlet of gas turbine unites (GTU) in operation conditions of Kazakhstan and Ukraine was analyzed. To increase the efficiency of cooling air in actual climatic conditions a two-stage deep air cooling in waste heat recovery chillers of combined type that convert the heat of exhaust gas of GTU has been proposed as a novel approach in GTU inlet air cooling. The calculations were conducted for cooling ambient air to 15 °C by absorption lithium-bromide chiller (ACh) and down to 10 °C by absorption-ejector chiller (AECh). It was shown that air cooling in AECh provides approximately 1.5 times greater annual reduction in fuel consumption compared to cooling air in ACh. [ABSTRACT FROM AUTHOR]