I was curious, so I googled around a bit — please excuse the weird units.
- about 0.375kWh to produce 1kg of LN2
- about 0.056kWh to boil 1kg of LN2
So you get 15% efficiency; though you have “waste cold” in the exhaust you could recover if you wanted, eg, to run a Sterling engine. You still have a 220K temperature differential after boiling to gas versus ambient.
- about 0.375kWh to produce 1kg of LN2
- about 0.056kWh to boil 1kg of LN2
So you get 15% efficiency; though you have “waste cold” in the exhaust you could recover if you wanted, eg, to run a Sterling engine. You still have a 220K temperature differential after boiling to gas versus ambient.