[Gasification] Six Stroke Engine

[doug.williams]

Hi Daniel,

You Ask:

> I haven't before seen the term "gas cooling" as you use it above, and
> can't really figure out what effect it is you are describing..... help?

The gasifier is a package plant, the concept of which allows it to be used 
in either stationary, or mobile application. Useful in a rural situation. 
The higher gas output of the mobile RPM, puts more demand on the gas cooling 
system, because the temperature profile increases as more BTU's need 
rejection as waste heat.

When you are testing the parameters of a cooling system, it's important to 
establish how the design copes with the big swings that load change imposes 
on the phenomena that takes place inside the cooling system components. I 
only offered the gas temperature at the cooling input, as indication of the 
other hidden down sides of operating an engine at higher RPM.
This development programme in Australia is to arrive at a design, 
specifically for tropical conditions, so having proven the performance as a 
power generation system, it's now being tested on the Ute.

> (I also don't understand why they needed to drive their truck in this
> manner - was it working even worse in higher gears and lower RPMs?)

In the first instance, I think they were less than prepared for the 
experience. I would normally be involved providing instruction, and there 
really are a lot of details that needs close attention to get it right. I 
went on vacation at the wrong time!!  Remember that it is also a lot of fun 
to try things, and beggar the details.

Higher gears, and lower RPM only work on the flat, but  when you start to 
move through gears, the gasifier behaviour can fluctuate, if you are 
forgetting to drive it, as well as the truck. Until you get the feel for 
driving with energy that is made on demand, it can be a very bad experience 
for the beginner, but I think the answer is probably a 24 speed gearbox (:-)

 Doug Williams.