MODELING OF GAS COOLING AND CONDENSATION
IN A PISTON EXPANSION MACHINE

K. M. Aref'ev,a O. V. Belyaeva, b 
A. Zh. Greben'kov, b  T. A. Zayats, b  
and A. A. Mikhalevichb 

UDC 533.24

A model of gas cooling and condensation in a piston expansion 
machine has been developed with allowance made for formation of nuclei 
of the liquid phase and growth of droplets as well as for real thermophysical 
properties. Internal heat release related to phase transition is taken 
into account in the adiabatic equation. The processes of cooling and 
liquefaction of methane in the piston expander are calculated for 
specific conditions.

a State Polytechnical University, 
St. Petersburg, Russia; b Joint Institute 
of Power Engineering and Nuclear Research - Sosny, National Academy 
of Sciences of Belarus, 99 Academician Krasin Str., Minsk, 220109, 
Belarus; email: greb@sosny.bas.net.by. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 77, No. 5, pp. 52-59, September-October, 2004. 
Original article submitted December 30, 2003.