Abstract: Based on the refrigerating characteristics of condensing oil vapor recovery system, the hydrocarbons recovery principles and the condensation efficiency were discussed by numerically analyzing the condensation curves of three various oil vapor-air mixtures. Results showed that the oil vapor recovery rate was mainly depended on the mixture compositions. Therefore, the design of condensing oil vapor recovery equipment should base on the characteristics of oil-gas mixtures. The latent loads from the condensation of oil-gas mixture were cooling loads mainly, in which the cooling loads of the shallow cooling stage and the deep cooling stage were relatively heavy. Structure characteristics of fin-tube heat exchangers for condensing oil vapor recovery were discussed based on the calculated data of cooling loads.

Key words: condensation, oil vapor recovery, efficiency, fin-tube heat exchanger