Publication: Charging island homes

Do you think islands can benefit from the use of Electric Vehicles?

It’s quite reasonable to agree on the benefits.

Because of the limited distances, because of the availability of renewables, lack of local fuels and high energy dependence, and because of the environmental impact, electric mobility apparently fits there like a glove.

Besides, resiliency to face weather events by storing energy in the vehicle, and reducing peak electrical demand on normal conditions seem to be economically beneficial.

kreta-1364084 car island

Image taken in Crete by Repsaj on freeimages

The research we recently got published in Energy, focuses on the effect of using the vehicle’s energy to charge the home at peak load and charge the vehicle* during valley.

This is what we found out…

Sigue leyendo

NZEB + EV: The decarb combo

Are you aware of these stats?

  1. Buildings account for 40 % of energy consumption and 36 % of energy emissions (EU data)
  2. Road transport accounts for 25 % of energy consumption and 20 % of energy emissions (EU data and EU stats)

Then, what happens when we combine NZEB buildings (net Zero Energy Buildings) with local renewable generation and EVs (Electric Vehicles) charging in these NZEB?

NZEB & EV.png

It’s obvious… -> We can decarbonize 65 % of the energy system!* Sigue leyendo

Future superavits in Energythaca

On one hand, the rise of renewable energy, even before the 100% goal, will bring superavit of power. This means there will be excess power that is not required in the system. It already is happening and it will be even more so. This power can be stored, but of course, using it directly is more efficient and thus, preferable.

On the other hand, the penetration of robotics and software will change the jobs available for humans, as is in discussion in Davos these days. This means there will also be a superavit of productivity.


Overflow. Image from Andrea Kratzenger on

We will have Superavit of Power and Superavit of Productivity, that we must use wisely to Sigue leyendo

Technocratic paradigm and Smart Cities

If you are interested in Smart City technologies and experiences, I strongly recommend the following report from Nesta:

Rethinking Smart Cities From The Ground Up

The proposal is similar to how I suggest to build the Smart Grid: Do it bottom-up, empowering the consumer/citizen. In this case, the report justifies that the highest return is on collaborative technologies that allow the citizens to participate and shape the future of their cities.


Citizens. Image by Murat Cokal on

As is widely mentioned, there is no smart city without smart citizens. Just like there is no smart grid without a smart consumer. Thus, investing in smart people is absolutely necessary for Sigue leyendo

Not so sustainable, after all?

Finally sold my car!

Yes, I was considering to buy an EV, as I discussed in the post “To EV or not to EV”. But, for the moment I just sold my car and will try to be “car-less person”. At the end of the day, using public transport, car-sharing (we now have car2go in Madrid and it works great) and the bike is clearly more sustainable than owning any vehicle. (Well, and also borrowing my wife’s car sometimes…)

Parte trasera coche fino

But: I sold it. Which means my 15-year-old diesel guzzling 7-series BMW will still be consuming +15 l/100 km and emitting lots of particles and CO2 pollution. Depending on the distance the new owner will drive, it might be more ecological than him buying a new, more efficient, one. That’s because of increased asset utilization and vehicle construction sunken emissions. However, it might be that the most ecological and sustainable would be  Sigue leyendo

The “magic” of Autonomous Electric Vehicles

Autonomous Electric Vehicles (AEV) not only will change the way we drive, (actually the way we won’t drive)

There is a more interesting consequence related to Asset Utilization and Efficiency you should consider.

The key to unlocking so much efficiency potential from such a vehicle is the time when the owner is not been driven by the car. When the car is working for it’s owner, that’s where the “magic” happens…


Image by D. Warrington on freeimages

During these otherwise idle times, the AEV can be in use (increasing the utilization of the asset) and enhancing the efficiency for a) it’s ownership, b) the electric and energy system and c) the logistic systems.

How is that? Sigue leyendo

The least sustainable gadget possible?

I think it might be, every time I see one… but specially when I hear the noise.

It’s probably one of the least efficient and more disturbing modern technology around. Burning oil to produce noise and smoke, in order to spread dust and debris around! What can be better?


The “dreadful” Leaf blower

The funny thing is the device doesn’t even pick up the leafs, once they are pushed somewhere, they still have to be picked-up for disposal.

Of course it can save time, but…

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