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I have no thermodynamic properties for R134a. If you have access to a thermo or other book that describes the Rankine & Brayton cycles, it would help your calculations. For both, the idealized expansion process is constant pressure. In reality, you will have internal losses. Use ideal gas...

If I understand, you are using solar energy to heat the working fluid (I assume you will evaporate a liquid), then you expand through a "turbine" to create useful power. The ideal condition would probably be to expand until the fluid condenses. At that point, you have taken out all...

Altronic built/builds all the electronic controls for Waukesha as far as I know--Ignition modules, Detonation sensing modules, turbo control modules, A/F modules, etc. We purchase a few items, such as ignition coils, from an Altronic dealer instead of a Waukesha dealer--saves a bunch of money...

My book is dated 1986 and it uses FORTRAN programs. Chapter 3 starts on page 103. It has been way too long ago that I took that class; maybe I can find my 5.25" disk with the program some day. Just glancing at the text and "a subroutine for equilibrium combustion products," it...

What type of service? If standby power generation, then maybe you have a thermal shock type of problem when you ask the cold engine to produce full power within too short of a time period. Some folks crack a lot of heads and other components that way. If you have too much piston skirt to...

Well, our latest failure looks to be a de-lamination of a main bearing. Bearing cavitation has been an issue in the past, and we have 2 units that haven't been "upgraded" with the later style, fully grooved, main bearings. We haven't gotten all the bearings inspected, yet, so I am...

Brandnew, If you changed the mass of air internally in your supercharger, then you did something nuclear. The supercharger can only change the air DENSITY. The "mass air flow" sensor should do exactly what it says, no matter where it is in the system. It should tell the ECU how...

Have you checked the Thomas Register?

We have 5 Waukesha 12V-AT27GL engine-generator packages burning 100% landfill gas (about 58% methane on average). Each unit was factory rated at 2100 kW electrical output. After a series of catastrophic failures (2 connecting rods and 1 crankshaft) we tend to limit output to about 2000 kW...

The full link didn't work for me, but I was able to get there from the company's home page. I see a couple of other potentially useful papers and an emissions calculations spreadsheet in the list of downloads.

Assuming you spin the engine with an electric motor, you could calculate Watts from the measured voltage and amperage. To get a more accurate value for the engine losses, you will need to know the efficiency of the electric motor. I think that should be all you need. Good luck.

willeng, I have found a reference that says too hot of a spark plug can promote detonation, but I think you said you have tried colder plugs, so maybe not much new there? Also, if you have a misfiring cylinder, the others try to compensate and become overworked. Since you seem to be getting...

And here is my 2 cents worth: In summary, it depends on the additional load created by extended towing and the original design constraints. The rods will experience cycles of compressive and tensile forces as mentioned in the better posts above. ANY rod will break if the combination of load...

willeng, Do you have access to an engine dynamometer? I think most of those shops have spark plugs that are fitted with pressure &/or temperature probes. They can also determine your exact air/fuel ratio at all operating levels. I have not been involved with race engines, so some of my...

This is too hilarious. My Websters Vest Pocket says (if I read the abbreviations correctly) that is is the present tense of be. By the way, if any of you ask a shop tecnician, he will tell you those components are neither collets, nor cotters, because everyone calls them valve...

Pitting from above the top piston ring is a classic sign of detonation, and I am certain that is where your aluminum on the plugs is coming from. There are several items that can cause or contribute to pre-ignition detonation. They include anything that creates higher than "normal&quot...

I hope I am not to late to this discussion, but I think a Caterpillar rep gave me the program they use for performing methane number calculations. I suggest you contact your local rep. If you don't succeed, then I might be able to find it and see if it is transmittable. I do not know the...

Thanks again, RDK, for your insight. I am not really management material, but I do need to be able to manage projects. I'll try to implement the strategies & tools from my current book. They make sense to me, and I don't need to expand on them at this time. I'll also be keeping my eyes and...

RDK, I agree with much of what you said, and I need help in every area you mentioned. Here's my scenario: Small public utility with many "projects" Limited staff resources Recent budget problems Politically motivated staff reduction instigated by an outgoing General Manager, which...

I took a 3-day seminar by James P. Lewis which included a copy of his book "Project Planning Scheduling & Control." Check the website www.lewisinstitute.com for info. I thought it was very good, but I have limited experience. At least one nuclear plant trains much of their staff via...