Re: Jeff Woods – Judson Installs Reengineered Heat-Exchange
Lee Stockwell said:
Les, building propane units is fine for your company, you have a lot of experience doing so. HX machines aren't your specialty. For example, did you know that by removing the coolant exchanger you make the engine run hotter?
Lee,
I am inviting you to come to Greenville to visit my facility. I think your opinion of me will change once you see the 40 – 45 experimental heat exchange units I have in the field here. I have designed heat exchangers in every possible configuration you can imagine. I even made a small unit with an 8 hp single cylinder air cooled engine on which I had an oil cooler behind the cooling fins of the engine to preheat the water. This unit had a #2L blower turning 6,000 rpm with a blower heat exchanger. The unit also had exhaust heat exchangers with preheat stingers on the end of them. This unit would sustain 180 degrees with the trigger held open full time.
The best design I have come up with so far is the Reactor which Cu owns. What is so unique about this particular heat exchanger is that the only control on the unit is a $5 car thermostat. When the unit increases in temperature, water will flow into the radiator and stabilize, similar to the
Butler system. This unit also has an exhaust heat exchanger with engine coolant running through it. The pump pumps cold and the regulator operates cold. This unit is a 200 degree machine. The reason I am not selling Reactors at this time is that people keep telling me they have to have more than 200 degrees. This will require a more complex design and I am not willing to give up reliability.
Your comment about removing the coolant heat exchanger making the engine run hotter may be true, but it is insignificant. The engine has an internal thermostat that prevents the engine from running over designed operating temperature. As long as we are running the engine at the temperature that the engine manufacturer designed it to run, we will not have a problem.
Lee Stockwell said:
A larger waterbox and meticulously cleaned water filters will help HX capacity.
Lee,
The larger the water box on a heat exchanger, the longer the unit takes to preheat. Once this heat is stored in the larger capacity water box, it will give you a longer trigger time but on very large commercial jobs it will eventually drop back off. A larger water box will not allow the machine to operate at higher temperatures. It will just give you more time before the temperature does drop.
Lee Stockwell said:
Jeff Woods made comments on your video that telegraphed his mechanical comfort level with troubleshooting.
Jeff Woods did trouble shoot the machine correctly. It was a computer failure. Jeff Woods was told he needed to replace the computer. All I did was reset the computer once it came to me.
Lee Stockwell said:
Bane's design gives maximum heat until the fresh water tank is emptied, no matter the flow. It's adequate and rather foolproof. It's a great machine for a newbie to learn the ropes on.
You’re correct. Until the tank depletes it will maintain that temperature, but if you put a high flow system on a Bane, it does not have adequate vacuum capabilities to recover it. A Bane has a 33 Roots blower turning 1750 rpms. The relief valve is set at 10 inches of mercury.
Lee Stockwell said:
My sons and I run PC Performer 405's and haven't had any unusual glitches. Justin can change the blower belts in less than 20 minutes (he says 17) with two ratchetwrenches.
Lee,
I’m glad you and your son are working together. I worked with my Dad most of my life. I was born into this industry. The
Prochem 405 is the best truckmount Prochem has ever made. That is why you are having so few problems with it.
P.S. Here is a photograph from 1979 where I reengineered a Prochem 100A. Also a photo of an air-cooled TNT with an experimental heat exchanger on it, which works quite well, but the pump does pump hot on this unit.