IC Engine

CALCULATION METHOD OF ENERGY CONSUMPTION - inive
calculate specific energy consumption

Ahem: http://www.simetric.co.uk/si_cc2hp.htm

Specific energy consumption is energy in the fuel/mechanical energy output. But be careful as it can be expressed in various ways and in various units.

Implication is you have a figure for specific energy consumption. Multiply that by brake power (= shaft output power) and you get energy released by fuel.

In general, you cannot (directly) find the energy released by fuel from a "specific energy consumption vs brake power graph plot". Those plots are not common. More common are BSFC (brake specific fuel consumption) charts, which give the mass of fuel consumed for each horsepower hour (or kilowatt-hour) of engine output (at various speeds and loads).

The energy released from the fuel goes mainly into heating the air around the engine (via exhaust flow, radiator, direct engine block-to-air heating, etc.) A smaller portion (up to about 35% in modern petrol car engines) goes to producing brake horsepower.

So, in a typical petrol engine, 115,000 btu/gallon is the energy released by the fuel, but only about 1/3 third of that is turned into brake horsepower-hours.

As Codemaster said, you must be quite careful to ensure that you are understanding exactly what has been measured. The common way to find the "energy released by fuel" is to burn the fuel in a calorimeter.

is there any simulation software for dry cell hydrogen generator ???

No simulation software needed. (2)H20 (plus energy) = (1)H2 +(2)O2.

In the most efficient hydrolysis units (for which "dry cell" is a misnomer, usually used only by HHO wing nuts), the energy equivalent of the hydrogen generated is 50% of the energy invested in creating the hydrogen. Of course, it would be crazy to create the hydrogen by using, for example, the electrical system of a car, which is itself very inefficient. (In that case, the car burns about 5 or more energy units of fuel for each energy unit of hydrogen produced.)

However, using solar power to generate hydrogen with such a unit could supply hydrogen fuel for your car, without wasting fuel to so so. The size of the unit required would be enormous, (about the size of a garage) unless you only drive a few feet per day. You'd need a plant for compressing and liquifying the hydrogen too. And obviously, you'd need a highly modified car as well, unless you happen to own one of the manufacturer's prototypes.

Most of the manufacturer prototypes use fuel cells to produce electricity, using hydrogen as the feed stock. This is more efficient than burning the hydrogen in an engine (about 60% vs about 25%). Even then, the round trip efficiency, from solar power to car wheels turning is very low, and the costs are very high. Far more efficient to use the solar power to charge electric car batteries.

One more or less practical use for electrolysers that produce oxyhydrogen (the real name for what the wingnuts call HHO) is as small precision welding units used by jewelers.