GAS COMPRESSION BY JET PUMP COOLING

Abstract

In the present state of art of the thermal engines using gaseous medium, the exhaustion temperature is often far beyond the ambient. The intake and the outlet of the working substance - mostly air, steam or other hot gases - require power resulting in reduction in net throughput of the engine. The power requirement can - in many cases - be reduced, eliminated or even extra power can be gained by application of the compression tube. The compression tube is a device, which increases the pressure of the flowing gaseous medium. The pressure increase comprises two well-known effects: the ejector effect and the effect of the cooling on the stagnation pressure of the flowing gas. The compression tube can be recommended for stationary thermal engines, such as Diesel engines, stationary gas turbines of flue gas removal systems of boilers or ovens. Since the compression tube cools the gas, thus if it is applied in the exhaustion system of the engine, other methods for use of the enthalpy of the exhaustion gas - e. g. recuperators, waste heat recovery boilers, etc. - are excluded as waste heat utilization, at least in the temperature range of the compression tube.