Two-phase jet impingement heat sink integrated with a compact vapor compression system for electronics cooling

This paper introduces a compact vapor compression cooling system equipped with a small-scale oil-free linear motor R-134a compressor and a novel heat sink that integrates the evaporator and the expansion device into a single unit. At the present stage of the development, a single orifice was used to generate the high-speed two-phase impinging jet on the heated surface. The effects of the applied thermal load, orifice diameter, orifice-to-heater distance, hot reservoir temperature and compressor stroke on the system performance were quantified. The system performance was evaluated in terms of the temperature of the heated surface, heat transfer coefficient, coefficient of performance and second-law efficiency. The operating conditions that maximized the system performance for specific operating conditions have been identified.