|
I have been pomdering about lpg and cng for a long time now. My desire is not to use it as a primary fuel but to have it as a supplemental fuel for diesel.
I recently did a calculation with my local prices vs energy content.
Diesel 6.04 MJ/TL
LPG 7.06 MJ/TL
NG 122.3 MJ/TL
Where TL is Turkish liras.
Natural gas is way cheaper than the rest. But it is atmpspheric (at my home) and does not include compression costs.
A conversion is not really feasible (for me) unless it is diy.
With a small econobox which consumes 4-5 l/100 km and my daily commute of about 50km that would equate to about 2-2.5 liters of diesel per day.
Current diesel supplementation systems can go up to 70 percent cng and 30 percent diesel. (I have heard of 90-10 aswell).
Although i have all the equipment for scooba diving, for cng i would not want to mess with the high pressure gasses. Especially with cobbled up diy equipment. Examining my daily needs i would be consuming about 2-3 m^3 of NG worth of energy daily.
A fridge compressor that can go up to 20 bars and a scooba tank of 30L will give me 600 liters or 0.6 m^3 of NG. It could also be stored in an air mattress. Which are in the ballpark of diesel substitution territory.
Will the hassle be worth it to save a liter of diesel every day be worth the hassle is the point i am considering.
|