At 6:35 AM 2/16/5, Michael Foster wrote: > --- On Wed 02/16, Horace Heffner < [EMAIL PROTECTED] > wrote: >> Shipping liquid air or LN2 via large tanker has the terrific advantage that >> pollution would not be a risk. However, shipping LN2 is just not >> economically feasible due to the low energy density of 570 kJ/kg. LNG has >> an energy density of 5.15x10^4 Btu/kg, or 5.43x10^4 kJ/kg, about 95 times >> that of LN2. LNG shipping by large tanker is only marginally economic even >> with that high energy density. > >570 kJ/kg? That low, eh? What about pipeline transport? It's kind of self- >pumping.
Same problem. Methane is "kind of" self-pumping too - the jet engine compressors that run gas pipelines use methane as fuel. A significant portion of the cost of gas is transport. Transporting something with 5 percent of the Btu content simply can not be economical in comparison when long distances are involved. Regards, Horace Heffner
