The equations connecting speed of sound with other thermodynamic properties gases and liquids, suitable for numerical integration respect to temperature, density, pressure, along isentropes, are derived. Algorithms their solution given too. They tested several substances (e.g., Ar, N2, O2, CH4, CO2, H2O) in wide ranges pressure temperature. Average absolute deviation thermal is 0.0129% supercri...

The bifurcations of generic heteroclinic loop with one nonhyperbolic equilibrium p1 and one hyperbolic saddle p2 are investigated, where p1 is assumed to undergo transcritical bifurcation. Firstly, we discuss bifurcations of heteroclinic loop when transcritical bifurcation does not happen, the persistence of heteroclinic loop, the existence of homoclinic loop connecting p1 (resp. p2) and the co...

The objective of this paper is to explore whether the use of an internal heat exchanger can further improve the performance of transcritical ejector systems with C02 as the working fluid. Instead of using a simplified thermodynamic cycle analysis, the approach taken here is based on a more elaborated and experimentally validated system model for a real mobile air-conditioning system for a typic...

This paper describes the experimental comparison of performance of prototype transcritical C02 system for mobile ale to it's Rl34a counterpart, unit for Ford Escort that was chosen as a representative for the US, European, and Japanese markets. The paper presents the design of experiments and facilities for such comparisons and preliminary results. INTRODUCTION One objective of this project is ...