Andrusenko A. Improvement of operational characteristics of air-cooled ammonia condensers at presence of noncondensable gases.

The influence of the characteristic properties of noncondensable gases on the ammonia vapor condensation inside horizontal tubes are specified. The mathematical model of refrigerant vapor condensation in the presence of noncondensable gases inside horizontal tubes was developed. A series of experimental investigations on the operation of high-capacity air-cooled ammonia condensers in the presence of high concentration of noncondensable gases are carried out. The basic ways for condensing systems optimization and recommendations for condensers construction improvement are given. The algorithm of noncondensable gases concentration control and purging was implemented. It resulted in avoiding the installation operating with excessive energy consumption. It was suggested to evaluate the noncondensable gases influence on heat transfer performance of condensers using the value of relative saturation of vapor-gas mixture. The new design of plate-type noncondensable gases separator was developed.