On Super Critical Water Diesel

Abstract

This paper explains what SCW (Super Critical Water) diesel is, what sort of combined system it is, how effective it can be, why the authors develop it and how the system can be realized. One may, in a word, consider it as a kind of parallel combined systems by means of comparatively large diesel engines. This paper clarifies the reason why the parallel combined system for diesel engines is regarded as“SCW diesel system”.This paper introduces Super Critical Water (SCW) diesel as a parallel combined system and explains its efficacy and output focusing on the difference between parallel combined systems and series combined systems, referring to GT (gas turbine) parallel combined system and GT series combined system. One often calls the former system GT-Cheng cycle and the latter system GTCC (gas turbine combined cycle) . This paper points out that SCW diesel is not a simple regenerative or economizing system but a remarkable power & efficiency amplifier for prime movers.This paper also details how a parallel combined system for diesel engines could be materialized. Consequently, how to estimate the system equilibrium is studied. Here the system equilibrium means a balance between prime movers and waste heat exchangers and a balance between the air·gas cycle work and the SCW cycle work in the cylinders. In solving the equilibrium (especially as to the latter balance), the authors introduced the concept of“designing the cycle process of reciprocators”. Without this concept, it is almost impossible even to work out SCW diesel system and/or to make a plan of confirmation tests.Concept verification tests are still in progress. This paper touches on the test preparation. However, the expected outcomes for power increase, efficiency improvement and emission reduction are discussed.