Research on Theory of Low-pressure Vapor Ejectors for Refrigeration

摘要

It is widly used to make vacuum with vapour jet pump industry production. In the first,it may makes low temperature water that the temperature is 2 ~ 20X3. With the practice,it is proved that the technic of vapour jet pump is rapidly progress.It is a very significance work to make use of the waste hot and gas of industry production of metallurgy?chemical and rock oil. In this text,the series ejectors were studied systematically in fundamental theory,design,installation,adjusting,property parameters etc . We sum up the relation between compression ratio and entrainment coefficient. The design theory of the series ejectors was established,such as the decision of series,distribution of the total compression ratio,and the choice of the ejectors'type.etc,were settled. The optimal position of the converging nozzle and converging-diverging nozzle in the ejectors was discussed. The analysis of the limit states was made for the series ejectors.