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News-by-Numbers™
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providing numerical context to key current issues
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Introduction
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Every day we are
being bombarded with new information, often masquerading as news but more
often than not, sourced from political or commercial press releases.
Frequently the resulting items contain numbers, often having personal
implications. However, with conventional delivery there is no ability to
test, there and then, "what does this mean" or, if applicable,
"how will it impact me"?".
News by Numbers is dedicated to giving
numerical context to as much published information as we can. Many items will contain user-definable
variables, giving the reader the ability to look at "what if?"
scenarios, test underlying assumptions or insert more up to date
information.
The App will be indexed by both (i) month; and (ii) subject.
We will be experimenting a little over the first few months so don't be
unsettled if something has changed on a subsequent visit. (We don't believe this type of presentation has been tried
before.)
We will also be developing a Contact us page for comments and suggestions.
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Contents
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May-22
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(Not in any particular order)
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There has been great
debate recently over the cost of living and the role of the supermarket duopoly. A figure that has been highlighted is from
a Commerce Commission report estimating that the extra "duopoly
profits" to these two supermarket groups are around $1m per day.
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Redefine
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Profits ($m)
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It has been reported
that construction of NZ's first hydrogen refueling station is about to commence in Palmerston North.
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Looking at the
economics of green hydrogen, they are rather baffling in that the energy
required to product the gas is considerably more that the gas itself.
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Per kg H2
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Kwh
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Density
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Petrol
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Kwh/l
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Electrolysis
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Kwh/kg H2
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Compress
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Kwh/kg H2 (to 70 Mpa)
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As NZ embarks on an GHG emissions reduction roadmap,
it is worth reflecting on the context of our emissions. Our gross emissions account for just 0.17%
(ie 82.4 mt of CO2e) of the global total (from human activity). Nearly half of
these are biogenic emissions from farmed animals, giving us a very high per
capital emissions number. This ignores
the fact that around 90% of our low intensity (note: our lamb related emissions
are around a third of those in the UK) primary
production is exported. [Note to number-crunchers - what do our
emissions from consumed agricultural production look line?]
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Before we take the
moral high ground on our emissions reduction efforts, we need to look at
those we trade with.
Around two thirds are global annual coal production comes from three
countries, China, Australia and the USA. Together they account for 124 times
NZ's total annual gross emissions. However they account of 56.6% or our
exports and 46.3% of imports.
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Subjects:
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Electric vehicles
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Anyone who has driven
an electric vehicle will be an instant convert because of their smoothness
and breathtaking acceleration. However, there are a number of
"inconvenient truths" about EV, not the least of which the disposal
issues of their 350kg to 550kg batteries that relatively quickly get to being
only capable of receiving 80% of their claimed capacity!
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The other issue relates to
"fast-charging" outside the main centres.
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Capcty Khr
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Max km
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Charge km
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Chrgr Kwh
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H/h peak
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Per site
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Petrol
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l/100km
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Road tax
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/litre 91
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* excl GST
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© Copyright 2022
News-by-Numbers™ - All rights
reserved
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