Categorie: assessment

Large City fires in 2100 ( ‘D-Day’….)

The year 2100: Finally! It’s the year 2100, and for the first time, CO2 emissions from buildings will start going down. It should have been already zero by 2050, but due to spreading emissions over the lifespan of buildings, it’s only mathematically the case from 2100 onwards. Yearly that will…

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‘transgressive ‘ projects: the architect 3/3

Last time I wrote about about project development, and how everything was optimized within project borders, but the effects outside the project boundaries were neglected. But between architect and client, it’s just the same, and even worse, as became evident once again when I attended a presentation about a new…

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‘transgressive ‘ projects ! 2/3

A building is usually assessed sec, as a building. Or as a complex of buildings, within the project development boundary, both energetically and financially. See previous contribution. But that is often at the expense of effects outside the project boundary. A few examples can clarify this. Some years ago I…

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CO2 should not be traded

This week I was confronted again with CO2 calculations. It was about the (absolute) CO2 budget, the maximum that can still be emitted to keep a chance of staying under 1.5 degrees, and which will be exhausted at the end of next year.[1] The starting point, of course, should be…

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the rest-impact of recycled materials

Recycled materials, once created their impact on the environment, in many forms, and if that (negative) impact is not repaired or compensated, those materials still carry an impact in a second life. In other words , they cannot be considered impact free resources at the time of recycling, at any…

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LCA is not for practice. We need absolute energy indicators. 2/2

In many countries there is discussion at the moment about measuring the environmental impact of building ( and living ). [1] On the one hand of course the (operational) energy consumption, and how to deal with limited CO2 emission budgets. But on the other hand even more on the environmental…

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Building evaluation should change 1/2

There is a lot of discussion in the Netherlands about how to assess buildings, if you integrate material impacts in addition to energy, as well as to somehow include CO2 budgets. There is already an instrument for this, the MPG, (materials performance Buildings) but it is under discussion. Besides, in…

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The ‘Solar Space’, per m2 of living area 2/2

Since we are in an energy transition , in which we completely switch to renewable energy, the energy at building level will mainly have to come from solar energy. We assume that, the more local energy the better, and a ‘0 energy house’, including compensation for material energy, to be…

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On calculating per m2 living area ½

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 floor. Because it’s not about the impact per 1 m2…

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A CO2 budget (limit) for housing

Calculating in CO2 remains a challenge, especially when it comes to the remaining budget. There is in the Netherlands a small action group that is trying to define how we should deal with the remaining CO2 budget for the built environment. How much CO2 may be emitted (invested) per new…

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