Engine Tables Spreadsheet

Engine Tables
Doug Williams and Dr. Oscar L. Jimenez, October 2007

When the original Fluidyne Engine Tables were compiled by Jack Humphries back about 1978-9, they were to provide the user with a guide, as to how the engines at that time performed on Producer Gas. It simplified the mass of calculations that required inputs not readily available to those investigating engine powered generation, and as such, have proven to be reliable to this very day.

Now, nearly 28 years later, the original Tables have been given a new life, by Dr Oscar Jimenez, who has added additional features to help those interested in the evaluation of gasified engine power generation. It is not often that this type of information becomes available, free for public use, and I am pleased that I can assist Dr Jimenzes by making his Spreadsheet available on the Fluidyne Archive http://www.fluidynenz.gwprojects.org/EngineTables/enginetables.html

Like anything that will be used across a wide sector of people interested in
renewable energy research, there will be questions regarding it's accuracy etc.
Please direct all comment or inquiry to Dr Jimenez directly, oscar@geprop.cu
and not through me at Fluidyne.


format, is based on the Engine Table from Fluidyne Gasification, New Zealand. www.fluidynenz.250x.com Each engine, depending on its rpm value, is modeled on a separate sheet.

In order to assist the gasification community, in having a tool capable of helping in assessing technical pre-feasibility analysis, it has been enhanced, by adding some further outputs such as:

Gas engine efficiency
Dual fuel engine efficiency
Diesel replacement (liter/h and %)
CO2 offset.

These added outputs stem basically from integrating the original Engine Tables with other equations and data obtained from reported experiences and literature.

Diesel replacement is reported in two units providing choice of assessing how much diesel is saved, in dual fuelled engines, depending on how the information is to be used.

As you will see the tool allows the end user to handle basically two input data:

The engine swept volume.
Low calorific value of the gas exiting from gasifier.

The first input, of course, follows the same strategy previously defined by the Fluidyne Engine Table calculations, and the second added by myself. This allows a variable calorific value of producer gas to be taken into consideration, making this tool a little closer to real world gasifier functioning. When using the tool the author suggests first, to input gas calorific value and then, analyzing output of varying engine swept volume for a defined engine rpm.

Finally, I would encourage the gasification community to send comments, suggestions, or correction to help improving the tool.

Thanking you in advance.

Kindest regards.

Dr. Oscar L. Jimenez.

Energy Project Manager.

Centre for the Management of Information and Energy Development.

Phone: (537) 2027096, (537) 2061507

Email: oscar@geprop.cu