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Ronald Rovers
articles with visions, concepts and explorations about sustainability
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system boundaries

On calculating per m2 living area ½

31 juli 2022admin
agrodome-plattegrond-hor

It is common in construction to normalize per m2 floor: such as e.g. energy, material, ventilation needs, or even costs and investments. But when it comes to the national requirements for housing in fact you should not calculate per m2… Continue Reading →

assessment, building, embodied energy, materials, system boundaries, tools

From EROI to EROLI: energy return on Land investment ? 2/2

8 mei 2022admin
landschap

In the agricultural project that I described in my previous contribution [1], which was initially about the EROI, the energy return on energy investment, I subsequently calculated the effects back to land’input’. But then the thought soon arised: would is… Continue Reading →

agriculture, assessment, biobased, biomass, Embodied Land, EROI, EROLI, food, labor, land, landuse, system boundaries

Carbon storage in wood-timber 1/2

14 februari 2022admin
co2-protest_1372397i

Storage (binding) of CO2 in wood/timber is a hot issue at the moment*. But how should that be calculated really? Before I go into more detail, a few preliminary remarks: (the part on ‘calculating’ has been later added, and ‘CO2’… Continue Reading →

assessment, biobased, biomass, building, CO2, forests, future, land, materials, system boundaries

There is no ‘end of life’ of a building…

24 oktober 2021admin
Two Demolition cranes demolishing old row of houses in the Netherlands

Life has an end, but is there also an ‘end of life’, for products and buildings? Which is frequently used in science, like in building evaluations calculating with a maximum life span, but seems weird. It is understandable in trade,… Continue Reading →

assessment, building, eol, housing stock, materials, recycling, resources, system boundaries, tools

Electric cars : the broader story

27 september 2020admin
old-timer-elektrisch-2

Researchers and other involved parties are regularly at odds with each other: does buying an electric car compared with a fuel driven car reduce CO2 emissions or not. A few weeks ago, another such investigation was in the news. [1]… Continue Reading →

assessment, CO2, materials, mobility, policies, system boundaries, transport

A acute CO2 lockdown: When could that happen….2/2

5 juli 2020admin
water-shed-europaische_wasserscheiden-river-catchments-europe

When can we expect a real CO2 lockdown, some wondered, after reading my previous comtributions. Good question. Months ago, someone also asked how I saw the future in 20 years, following an article about predictions from 20 years ago[1]. That… Continue Reading →

climate, CO2, future, policies, system boundaries, transition

The Netherlands is worn out

16 november 2019admin
nederland-uit-de-lucht-aereal-2

Nitrogen levels are too high, as are levels of particulate matter, too much manure, CO2 emissions continue to rise, as does methane emissions, biodiversity drops dramatically, the agricultural land is exhausted, natural gas fields collapsing, heat waves of 40 degrees,… Continue Reading →

ecology, economy, future, politics, society, system boundaries

Embodied Energy emissions is now, not in 2050 !

8 september 2019admin
ee-graph1

This is an extended version of a previous post on linked in, which had a lot of reactions.. {april 2019}   When it comes to Embodied Energy, we are used to normalize this over the lifespan of a building (… Continue Reading →

0-energy, assessment, CO2, embodied energy, system boundaries, tools

Circular cities..? Real time material flows for London

11 februari 2019admin
dscn6285

Since it looks as if we are going to introduce the climate measures for buildings mainly via municipalities or cities, I have recovered some of my older research material about urban sustainability, developed when I worked at Wageningen University. The… Continue Reading →

architecture, building, circular, Embodied Land, materials, politics, resources, smartcities, system boundaries, tools, urban

From Tetra Materia, to Trias eXergetica 2/2

22 september 2018admin
trias-exergetica3

The Tetra Materia (see previous article) approach might be useful for practice, its not the whole story. It guides direction, but does not set targets. And our system has an overall limit as well. Materials, even renewables, come exclusively from… Continue Reading →

circular, energy, exergy, materials, resources, system boundaries, tools

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Happy New Year 2023 !

Form Follows Fysics - reinventing the built environment (2021)
People vs Resources - restoring a world out of balance (2019)
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ABOUT

Independant researcher, speaker, writer , thinker,
main focus: closing resource cycles

interview in national newspaper 2022 (English translated): 6 limitations in sustainability

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  • Building evaluation should change 1/2
  • Ourworldindata: on resource quantity and the energy transition
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  • Where to build, and where not to build (in NL)
  • The world of Babel (2)
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  • Not a CO2 focus, but a Post-Fossil focus
  • Is Art innocent…? and what about Musk or Putin?
  • Which books to read, and which to avoid…. (Non fiction…!)
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Ronald Rovers

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  • ron_rovers RT @j_vollenbroek : De meeste Nederlanders zijn vóór het doorzetten van een stevig stikstofbeleid. De uitgesproken tegenstanders van het sti…

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