Author Archives: Vaughan Pratt

My Mirai’s first birthday

My wife and I bought (ok, leased) our 2016 Toyota Mirai on May 19, 2016.ย  A year and nine thousand miles later is a good time to reflect on the wisdom or otherwise of this acquisition. The first thing I … Continue reading

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A more nuanced view of BEVs

To date I haven’t been kind to BEVs.ย  With the appearance three weeks ago of the Chevy Bolt on dealer floors I’ve come to realize that my objections to BEVs were based on the fact that every production model BEV … Continue reading

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Projects

ย Green hydrogen production via low-temperature alkane cracking (The following distinguishes renewable and green energy.ย  Renewable energy does not entail consumption of fossil fuels, for example wind, solar, hydro, biofuels, etc. In contrast green energy does not entail emission of CO2, … Continue reading

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BEVs vs. FCVs: TWO ESSENTIAL DIFFERENCES

THE TROUBLE WITH COMBUSTION Internal combustion engine vehicles, ICEVs, are powered by burning hydrocarbons like gasoline, diesel, ethanol, compressed natural gas, propane, and mixtures thereof. They pollute by emitting byproducts of the combustion, mainly CO2 as the principal cause of … Continue reading

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A MIRAI WITH ONLY 18 MPG???

If a Mirai ran on liquid hydrogen, how many miles per gallon would it get? The shocking answer is 18. But wait. The EPA says the Mirai has a fuel economy of 67 MPGe. How could being liquid make that … Continue reading

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Home Hydrogen

I believe the technology for home hydrogen fueling that will win out in the end will be a 1-5 cubic foot unit operating overnight, taking as inputs natural gas and electricity, and outputting hydrogen at a rate of 1-5 kg … Continue reading

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The Mirai’s air conditioning and fuel consumption

1. ๐”๐ฌ๐ž๐ฌ As with any car with air conditioning, the Mirai’s ac needs fuel to operate. How much fuel does it consume? This question is of interest to fuel economy: what hit does the MPGe take with the ac on? … Continue reading

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