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Messages - Jim Hunt

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Policy and solutions / Re: Energy Efficiency: The “First Fuel”
« on: November 23, 2017, 02:04:46 PM »
Talking of "smart homes", we're currently collaborating with the SPECIFIC project in South Wales.

See their "Active Classroom" and "SOLCER House":

Arctic sea ice / Re: Northern Sea Route thread
« on: November 23, 2017, 11:42:12 AM »
Was watching a documentary on Russian operations through the Northeast Arctic Passage.

Gotta link?

I don't know how smart my meter is. I talk to it, but it never says anything back.  ;)

Mine shows me pretty pictures! More over on the PV + battery (+ EV!) thread:,2162.msg134625.html

Walking the walk / Re: Managing PV + battery system
« on: November 23, 2017, 10:15:21 AM »
For the benefit of Neven (and anybody else who might be interested) this is what my SMETS 1 spec smart meter looks like. Hopefully the SMETS 2 devices due RSN will actually possess some smarts!

The communications module is at the top. WAN is GPRS, when it can get a signal. HAN is ZigBee, which communicates with the mini tablet inside the house, amongst other things.

Thanks in part to the Great British Chancellor of the Exchequer we're currently seeking expressions of interest from anybody in Europe with a suitably smart meter who might be interested in beta testing some novel electric vehicle charging equipment in a few months time.

Walking the walk / Re: Managing PV + battery system
« on: November 22, 2017, 09:09:41 PM »
A wider area should be considered, at least all the users of the 20kV line that supplies them.

It's funny you should mention that! Agreed, except that here in the UK it's 11 kV.

Electricity need at night is lower than during the day, which means that I wouldn't use the battery to load the car at night, but to support house consumption in the morning before the sun goes up. On the building I manage, the absolute peaks are in the morning when coffee machines and water heaters are working. Water heater are related to showers and coffee machines to breakfast. There is also a peak in the evening, but wider and lower (probably higher total consumption, but during more time). Maybe we should have had a bigger warm water storage.

The MyEnergi system certainly relies on heating water when all other attempts at self consumption fail.
The second point is that the general load curve is higher during the day, so on a global level, PV related batteries could only be loaded when global supply is insured without CO2.

Not that it's a lot of use to you in Luxembourg, but you might be interested in our open source UK grid carbon intensity app?

Today's graph is below.

I wonder how smart grid will be able to manage a fair sharing of the incomes related to discharging batteries in the network when electricity demand is high. Same question about who will be able to load his battery with cheap electricity when supply is higher than demand.

The $64,000 question! The conventional answer is a fully functional "local energy market", but we're a million miles away from such a thing in the UK.

Walking the walk / Re: Managing PV + battery system
« on: November 22, 2017, 02:40:12 PM »
Hi Etienne,

I think I just asked my "smart meter" question in the wrong thread!

You may wish to peruse this recent article of mine?

The MyEnergi Eddi/Zappi combination may well be of interest in here? Also we're currently attempting to raise funding for a (hopefully!) novel hybrid PV inverter project. Perhaps we should compare notes at some point?

That looks pretty cool, Etienne. I love measuring stuff.

What is the state of play regarding "smart meter" rollout in Austria? Do you have one for example?

Same question for Etienne, in France I assume.

Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: November 22, 2017, 02:27:18 PM »
All of sudden vehicle to grid technology is a hot topic in the British mainstream media

The associated "tweet" seems to have achieved "lukewarm" status at least:

Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: November 22, 2017, 01:54:13 AM »
All of sudden vehicle to grid technology is a hot topic in the British mainstream media:

V2G Explained by the Mainstream Media

A few days ago The Times newspaper published an article on vehicle-to-grid technology.

Today the BBC have followed the Times’ lead by publishing an article by Theo Leggett with a slightly different perspective. Unfortunately they included at the top a stock photo of what looks a lot like a Renault ZOE instead of a Nissan LEAF.

However despite the best efforts of the UK's leading investigative journalists we can reveal a world exclusive photograph!

Do you suppose that if and when the “cost and complexity” reduces and V2G does “make commercial sense” in Tesla’s view, power will suddenly start flowing in the opposite direction down that stout red cable?

Arctic sea ice / Re: PIOMAS vs CryoSat
« on: November 21, 2017, 11:52:24 PM »
A new open access Cryosat-2 paper from CPOM:

Estimating Arctic sea ice thickness and volume using CryoSat-2 radar altimeter data

Lots of technical details are included. Amongst the conclusions:

By providing unparalleled coverage of the Northern Hemisphere, data from ESA’s CryoSat-2 mission have allowed us to produce hemisphere-wide sea ice thickness and volume estimates since November 2010. The provision of sea ice thickness data from satellite is crucial in understanding how the ice pack as a whole is changing. Here we have provided an end-to-end, comprehensive description of the processing steps that we use at CPOM to obtain estimates of Arctic sea ice thickness and volume from CryoSat-2 data, along with a detailed analysis of the uncertainties associated with our retrieval and an evaluation of our sea ice thickness product. In theory, the method presented could be used to retrieve sea ice thicknesses in the Southern Hemisphere, and it provides the foundation to develop sea ice processing systems for other Polar orbiting satellite radar altimeters.

Ideally, our uncertainty analysis would provide an error for each point measurement of sea ice thickness rather than grid cell values. This is currently hampered by a lack of knowledge regarding the correlation length scales and temporal variations of contributing factors such as snow depth and density, and sea ice density.

Arctic sea ice / Re: Arctic Image of the Day
« on: November 18, 2017, 12:11:03 AM »
The Arctic moving image of the day:

Via SpaceWeather:

On the evening of Nov. 16th, aurora tour guide Tony Bateman of northern Finland was indoors, warming up between auroras, when his surroundings began to vibrate. "There was a huge bang and the cottage shook violently," he reports. "At first I thought it was an earthquake. Or maybe a tree fell on the cottage roof! I walked outside and inspected the trees. Everything looked okay." A quick replay of his aurora webcam solved the mystery. "It was an incredible meteor," he says.

Consequences / Re: Hurricane season 2017
« on: October 30, 2017, 02:08:41 PM »
Not a hurricane of course, but nonetheless:

"1.5 million customers are without power in New England"

Policy and solutions / Re: Batteries: Today's Energy Solution
« on: October 24, 2017, 10:04:37 AM »
Do you have a website for that? Or is this "can" in the theoretical sense?

From this side of the pond:

Policy and solutions / Re: Renewable Energy
« on: October 22, 2017, 09:41:25 AM »
4MWh batteries obviously doesn't make it fully dispatchable. Maybe it doesn't need to be dispatchable if the supply reasonably matches demand perhaps it doesn't make the need for dispatchable generation much or any worse?

The allegedly United Kingdom's Government finally seems to be getting around to the idea of trying to match demand to supply instead of the other way around. An overview of my visit to the BEIS basement last week:

Very important to realize the Australian electricity market is like Enron on steroids. The main players have been manipulating  availability to create price spikes.

Even relatively small amounts of storage like the 4MWh of the new project break this and prevent wide scale price manipulation. This storage is not about smoothing solar or wind but rather all about being able to jump in to prevent coal and gas generators from exploiting a terribly designed market.

Or as I put it:

If you’re “committed to tackling climate change” you really should be committed to minimising the integral of the blue line representing UK plc’s actual carbon intensity. Unfortunately that’s not how the UK’s energy markets currently operate. Perhaps they need a redesign?

Consequences / Re: Hurricane season 2017
« on: October 17, 2017, 02:31:13 PM »
The latest news from ESB Networks:

At the height of the storm, 385,000 customers were without power but 170,000 have now had their power restored.

Consequences / Re: Hurricane season 2017
« on: October 17, 2017, 12:09:27 PM »
This morning's Ophelia power cut summary:

ESB: 360,000 and counting
NIE: 52,000
ENW: 18,000
WPD: 15,000

According to ESB:

We are advising all customers impacted by outages that they should prepare to be without electricity for number of days. It is very important that any customers who use electrically powered medical devices should contact their healthcare professional to make alternative arrangements if necessary.

Consequences / Re: Hurricane season 2017
« on: October 16, 2017, 03:20:52 PM »
BBC now reporting over 100,000 without power

By my own calculations that number's now over 180,000.

Consequences / Re: Hurricane season 2017
« on: October 16, 2017, 12:30:02 PM »
Over 35,000 properties across southern Ireland are now without power, plus a few thousand more here in Cornwall:

Consequences / Re: Hurricane season 2017
« on: October 16, 2017, 09:13:56 AM »
The winds are starting to pick up here in North Cornwall. The last NHC bulletin on Ophelia shows her tracking slightly further west, which should be better for us:

The 60N cut off is back too!

Consequences / Re: Hurricane season 2017
« on: October 15, 2017, 11:09:48 PM »
From the latest NHC update on Ophelia:

No 60N cut off this time around!

Consequences / Re: Hurricane season 2017
« on: October 15, 2017, 05:15:05 PM »
The latest update on Ophelia from the NHC, together with my local surf forecast:

Consequences / Re: Hurricane season 2017
« on: October 15, 2017, 01:36:51 PM »
I'm closer to the eye of Ophelia than Patrick, and as luck would have it on Friday I was demonstrating a climate model in the basement of the allegedly United Kingdom's Department for Business, Energy & Industrial Strategy (BEIS for short):

I don't know about you, but I find it instructive to compare our Twitter feed with theirs. It was also instructive that I had long conversations with engineers from BEIS and OFGEM on our stand, but the policy wonks were noticeable only by their absence

Getting back to Ophelia, I'm due to be driving to Bristol during the peak of the impending storm on Monday. I think it'll be safer if I stay in front of my keyboard instead in order  to document the resulting power cuts. Here's the current NHC forecast:





Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: October 03, 2017, 09:55:00 PM »
I was surprised to see there still isn't a solution for this, having read about it years ago (probably on Jim's V2G blog).

Vehicle-to-home has been available for a number of years in Japan, but getting bi-directional charging stations to European standards is a decidedly non trivial problem, especially at a sensible price.

Arctic sea ice / Re: What the Buoys are telling
« on: October 03, 2017, 05:04:57 PM »
It's starting to look decidedly wintry around O-Buoy 14:

Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: October 03, 2017, 02:16:42 PM »
My pleasure Neven,

If I were you I'd wait a while before even attempting to invest in an EV and associated vehicle-to-grid equipment. There's an awful lot of ill informed hype abroad at the moment. Expect matters in Europe to clarify somewhat over the next 6 months or so.

Just in case you're in London at the time, I shall be attending this event on October 13th:

Policy and solutions / Re: Renewable Energy
« on: October 03, 2017, 06:57:02 AM »
UK wind power generation is literally off the scale at the moment on the Gridwatch site

See also:

Carbon Intensity dropped to an all time record low of 73 gCO₂/kWh overnight

Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: October 03, 2017, 06:05:52 AM »
The latest news from the European launch of the 2018 Nissan LEAF, along with lots of other stuff:

"Nissan’s Future Promises “Free” EV Charging"

Nissan also announced a UK collaboration with OVO allowing customers to purchase an xStorage home energy unit at a discounted price enabling them to ‘sell’ back energy to the grid. This helps contribute to grid stability in a world where demand for energy is increasing due to a growing, urbanising population. It can result in an additional expected income for users averaging £350 / €400 per year.

Not to mention:

The new 40kWh battery for the 100% electric e-NV200 offers a 60% extended range of up to 280km NEDC. And, with no increase in size of the battery itself, customers will face no compromise in either load space or payload. Crucially, it can help make 100% electric last miles delivery achievable for businesses and professional drivers everywhere, with customers now able to drive more than 100 km further on a single charge.

Folks here might also be interested in the shiny new open source application for our trusty Raspberry Pi:

"National Grid Launches Carbon Intensity Data Feed"

[UK] Carbon Intensity dropped to an all time record low of 73 gCO₂/kWh overnight.

Antarctica / Re: PIG has calved
« on: September 24, 2017, 09:19:10 AM »
You left out this one oren:

Crowdsourcing beats automation any day of the week!

Arctic sea ice / Re: IJIS
« on: September 18, 2017, 08:40:33 AM »
I'll go out on a (very short) limb and state my opinion that 2017 IJIS extent did indeed bottom out at 4.47 km2 on September 9, for a sixth place finish.

Be careful Jim. I went out on that self same limb a couple of days ago:

Consequences / Re: Hurricane season 2017
« on: September 11, 2017, 12:29:18 AM »
Power outages are now over 2.5 million across Florida:

Arctic sea ice / Re: Northwest Passage thread
« on: September 11, 2017, 12:11:59 AM »
Is there a equally recent chart from canadian ice service?

There is indeed:

In addition, David Cowper has left Cambridge Bay in Polar Bound and is heading east.

Policy and solutions / Re: Cars, cars and more cars. And trucks, and....
« on: September 06, 2017, 10:40:39 PM »
2018 Nissan LEAF revealed.

My own take on the new LEAF:

What gets my goat is all the people hyping the "addition" of V2G to the 2018 model. I even had to give Bobby Llewellyn a dressing down:

Arctic sea ice / Re: The 2017 melting season
« on: September 03, 2017, 03:06:37 PM »
I have ex Prof. Judy to thank for the heads up on this open access paper!

"Extreme cyclone events in the Arctic: Wintertime variability and trends"

Using a combination of station data from Ny-Ålesund and ERA-I, we find a positive trend in extreme cyclone events over the Arctic North Atlantic in winter. This trend is closely associated with the significant winter warming of the region. Composite analyses of extreme storm events at Ny-Ålesund reveal the importance of associated anomalous heat and moisture transports from mid-latitudes for Arctic amplification, in accordance with previous studies. From the observational point of view, we find that Svalbard is located in a key region of climate change, and long-term observations from the Ny-Ålesund station are representative for the broader Arctic North Atlantic region.

Whilst we're on the topic of cyclones, see also:

Arctic sea ice / Re: What the Buoys are telling
« on: September 03, 2017, 08:46:48 AM »
The WARM buoy pushpins have been updated. To my ageing eyes it looks like #6 is now free floating:

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: September 02, 2017, 02:35:34 PM »
I hate the cacklers!

So does Snow White! She's been inspired to create a somewhat surreal modern Arctic art installation:

"Reductio Ad Absurdum"

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: August 31, 2017, 05:44:23 PM »
Ever sailed to 85N?

See also:

It seems Babouchka doesn't count because she didn't only "sail". The absence of a safe return on her part is perhaps a valid point though?

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: August 31, 2017, 11:04:29 AM »
It's easy to cackle if you have people saying they will sail to the North Pole.

The point I was endeavouring to make in my original article was that it was the paragon of journalistic virtue that is the Sunday Times that wrote a headline to that effect above an article that didn't mention the existence of the Arctic Mission web site and its rather more nuanced mission statement.

However Pen Hadow did initially go along with that angle on things far too much for comfort, on the BBC and elsewhere.

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: August 31, 2017, 09:23:56 AM »
You beat me to it Niall!

Cue the cackling from all the usual suspects?

Consequences / Re: Hurricane season 2017
« on: August 31, 2017, 08:44:01 AM »
The latest NHC track has Irma becoming "major" on Sunday:

Maximum sustained winds have increased to near 65 mph (100 km/h) with higher gusts.  Additional strengthening is forecast and Irma is expected to become a hurricane on Thursday.

Arctic sea ice / Re: Northwest Passage thread
« on: August 30, 2017, 10:53:40 PM »
Crystal Serenity is now trailing in the wake of two icebreakers:

Heading for the open water?

Arctic sea ice / Re: The 2017 melting season
« on: August 30, 2017, 10:37:51 PM »
The current cyclone train extending from EPAC to the N. Atlantic reminds me a lot of the system that occurred in the winter to keep persistent high SSTs in the Atlantic side.

I'd been wondering aloud along similar lines in the heart of darkness. A fair way out, but:

Consequences / Re: Hurricane season 2017
« on: August 30, 2017, 05:24:37 PM »
The current NHC prognosis for Irma:

Consequences / Re: Hurricane season 2017
« on: August 30, 2017, 03:46:57 PM »
Irma will officially join in the fun shortly:

NHC will be initiating advisories at 11 AM AST on Tropical Storm Irma, located west of the Cabo Verde Islands.

Arctic sea ice / Re: The Mail's Great White Arctic Sea Ice Con
« on: August 30, 2017, 03:09:14 PM »
Shock News!

The “moderator” at WUWT has finally released my helpful comment from purgatory!!

Something has been lost in translation though :(

Consequences / Re: Hurricane season 2017
« on: August 30, 2017, 12:12:45 PM »
Harvey is finally giving Houston some respite, from the rain if not from the power outages:

Make sure to check out the rainfall radar animation.

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: August 30, 2017, 12:50:56 AM »
Yes, I knew Pen is a person.

My apologies for the misunderstanding!

Arctic sea ice / Re: What the Buoys are telling
« on: August 30, 2017, 12:49:30 AM »
The ripples are back:

Arctic sea ice / Re: What the Buoys are telling
« on: August 30, 2017, 12:07:22 AM »
The latest update from IMB buoy 2017B:

August 25th is the day before the buoy became "Free Floating":

Arctic Background / Re: Pen Hadow's Arctic Mission
« on: August 29, 2017, 06:31:12 PM »
Will The Pen Hadow be able to get in but not get out?

Pen Hadow is a person. The yachts he chartered are Bagheera and Snow Dragon II.

They have just breached the 80 degrees north barrier:

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