Agricultural irrigation pumps are frequently powered by common automobile or tractor spark-ignition (SI) engines burning natural gas. Typically, these engines operate at part-throttle and at constant speed and load. Investigated was the fuel consumption reduction that occurs with application of the more-complete-expansion cycle. Using a Chevrolet 5.74 liter (350 cubic inch) displacement engine for calculation purposes, fuel consumption rates are predicted as 12 to 16% less than a conventional engine (reference case). Economic analysis reveals that with irrigation pumps operating from 1000 to 2000 hr/year, the cost of modification is recovered by fuel savings (SO.97 per kg of natural gas) in one to two years.
The More-Complete-Expansion Cycle Applied to Irrigation Engines
Sae Technical Papers
1988 SAE International Off-Highway and Powerplant Congress and Exposition ; 1988
01.09.1988
Aufsatz (Konferenz)
Englisch
The more-complete-expansion cycle applied to irrigation engines
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