Numerical Modeling of Non-stationary Processes in Cryogenic Mechanical Thermocompressor

Abstract

Mechanical thermocompressor is suited for gas compression with constant volume by means of heat addition. Its classic modelling theories usually do not take into account non-isothermal conditions of its chambers. This article deals with thermocompressor modelling with nonisothermal hot and cold chambers. The results of the modelling show significant loss (16.45%) of compressor delivery due to non-isothermal conditions of its chambers. Maximal mass mean temperature deviations for cold and hot chambers are equal to 14.98% and-8.5% correspondingly. 

Study of Different Factors Influence on Thermocompressor Performance

“…Working cycle of thermocompressor is presented on Figure 2. Thermocompressor, investigated in [8] was taken as a prototype for given research. Its characteristics are presented in Table 1.…”

“…Mathematical model for thermocompressor calculation was presented in [8]. Thermocompressor delivery and arithmetic mean temperature deviations was used as comparison criteria.…”

“…The results achieved in [8] raise a question of other factors influence on thermocompressor performance. These factors include: 1.…”

“…However it does not take into account temperature change inside the thermocompressor change. Investigation of the thermocompressor performance with non-isothermal chambers was made in [8]. This research shows significant influence of temperature change on thermocompressor performance.…”