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Ronald Rovers
articles with visions, concepts and explorations about sustainability
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embodied energy

MNB1: 0-CO2 per 2030, MNB2: max 550 kg/m2

23 mei 2022admin
natuurhuis-strotec

Last week, two interesting reports were published analysing how regulations can better support ‘sustainable’ material use. Very esteemed colleagues, united in a Dutch ‘Gideons tribe’ to make the buildings sector move faster, have been working on this. [1] I can… Continue Reading →

biobased, building, circular, climateneutral, CO2, embodied energy, future, housing stock, indicator, tools

The renewal time of all resources- Maxergy 3.0

2 augustus 2021admin
regeneratie-volhoudbaar-landgebruik-2b

Everything is renewable – classification after growth rate – renewal time, flow rate . As a result of some recent projects new insights developed over resources, that any resource is renewed. Its only a matter of time. But that implies… Continue Reading →

agriculture, embodied energy, Embodied Land, exergy, land, landuse, materials, resources, solar energy

Half the agricultural land for biobased materials…

16 mei 2021admin
koolzaad4

Last week I published a letter in the Netherlands, in which I indicated that about 800,000 hectares of land would be needed for the construction of new homes. That’s how it works in a transition: We have to significantly reduce… Continue Reading →

biobased, building, embodied energy, Embodied Land, future, landuse, resources

Embodied energy data from building installations

6 december 2020admin
dscn9716

There is growing need for information of embodied energy impacts. As I argued in a Linkedin article last week: Needed: A international Embodied Energy Data Authority’.* But here I want to address the lack of data for especially installations. Mainly… Continue Reading →

building, embodied energy, materials, research, resources

Solar panels are not the solution…

7 november 2020admin
china-solar-panels-mountains

Before we hurry covering everything with solar panels, let’s reason a bit further, because since my first experiences with renewable energy, many new insights have emerged. Those first experiences I had when building a “Bicycle wheel windmill”, as described in… Continue Reading →

assessment, climateneutral, CO2, embodied energy, energy, future, money, policies, politics, resources, solar energy, solarpanels, transition

Solar panels: ≤ 1m2 PV per m2 floor …

26 oktober 2020admin
20200919_145358

As we want to get rid of fossil fuels, we will at least have to develop everything now without fossil fuels. And in any case the operational energy. In the case of new buildings this leads to “0-energy buildings”, which… Continue Reading →

0-energy, architecture, climate, climateneutral, CO2, embodied energy, energy, energyneutral, materials, nZEB, resources, solar energy, solarpanels, transition

Recycle question: aluminium can or glass bottle?

15 december 2019admin
festival-afval-waste

What is better , a friend active in the beverage world asked, recycling aluminium cans or recycling glass bottles? Neither, I immediately replied: always reuse, and never use aluminum. As the Dutch national environmental center reports: a deposit beer bottle… Continue Reading →

aluminium, embodied energy, materials, recycling

New construction must comply with regulations 2050!

4 oktober 2019admin
carbon-budget-6

Why didn’t we realize this before… Since a year or two there has been a working group of a number of collaborating researchers in Europe, under the wings of an international NGO (iiSBE) who are investigating what the ‘carbon budget’… Continue Reading →

0-energy, biobased, building, CO2, embodied energy, future, housing stock, materials, retrofit, transition

For 1,5 degree scenario: biobased construction is inevitable

22 september 2019admin
graz-img_20190912_100614709

Some time ago ,  I was in a meeting for writing a biobased building manifest. Very  interesting discussions, which were hardly ever held at the policy level. Although I get signals that the discussion about the impact of materials, as… Continue Reading →

biobased, building, climate, embodied energy, future, materials, resources

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

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Happy New Year 2022 !

Form Follows Fysics - reinventing the built environment (2021)
People vs Resources - restoring a world out of balance (2019)
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  • A ‘ New Bauhaus’ ? Or Solar Decathlon ?
  • MNB1: 0-CO2 per 2030, MNB2: max 550 kg/m2
  • From EROI to EROLI: energy return on Land investment ? 2/2
  • EROI and land use of potato crop – a pilot 1/2
  • Continue partying, or (CO2) lockdown ?
  • Critical look at graphics illustrations.
  • The Bionological House
  • Carbon storage: the land-time relation 2/2
  • Carbon storage in wood-timber 1/2
  • a CO2 budget for a municipality
  • Environment and climate checklist for journalists
  • Change, back then and now
  • the creating-debtors-theory of money…
  • The future country of the Netherlands
  • Golf – the decadence in our use of space

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