Experimental Investigation of Water Spray Cooling for Temperature Reduction in Liquid Piston Compressor

摘要

For many compressor applications achieving an efficient compressor necessitates an isothermal compression process. A high heat transfer rate during the compression process is needed for reaching near-isothermal conditions. In this study, experimental investigations are carried out with water spray injection in a liquid piston compressor during the compression process to absorb the heat and lower the temperature. A low flow full-cone nozzle with 0.045 in (0.1143 cm) diameter is used for the experiments with different injection pressures. Injection of water spray proved to be an effective heat transfer mechanism for a substantial temperature drop of air during the compression process. It is observed that increasing the injection pressure of spray resulted in a temperature reduction of 10-20 K during compression. For a compression ratio of 2.5, a 10-20% efficiency improvement was observed during the compression.