Maxergy, and Embodied Land, a (very) short introduction / rationale
1 As with kWh for energy, you can indicate materials quantities by kilograms , and compare for instance buildings. And kilograms, is just as kWh, a good proxy for the impact. (per m2 for instance, see the graph of some calculated houses)
2 But what about the quality of energy and or materials? Fossils versus renewable energy, high impact an depleting resources versus regrowable and renewable materials? But even more important: How to evaluate energy performance combined with their materials impacts? If for instance the energy (reducing) ambitions lead to more material impact? Then current ways of assessment methods show many imperfections:
A use of weighting factors to combine resources impacts should be avoided.
B Assessment should not related to a ( historic/ bad) benchmark, but indicate the (distance to the) ideal situation where both energy and materials impacts are compensated within the time of use
C the total resource chain should be evaluated, not only starting from accidentally availability of resource stocks, or within subjectively chosen system boundaries .
3 The question is, where do the resources come from in any system? If they come from inside the system, eventually you will run out of resources. If you get them from your neighbours, they will run out faster. The only free resource outside of any system , with the global system as the ultimate border system for mankind, is the sun, sending out radiation into the system that can be captured and converted into food, energy and materials. In order to do this, you need land area to receive that radiation, and produce a certain quantity and quality over a period of time. That’s the basis for the MAXergy approach and the “Embodied Land” calculation model.
4 The principle of MAXergy is to relate all the resources to the amount of solar input needed to generate and transform these resources via the land area needed to capture and convert the solar radiation into useful resources providing functions. In other words, to maximize exergy (changing potential) in a system and to prevent the loss of exergy (avoid or delay increasing entropy). The resources used from within the system are therefore required to be restored again within the lifetime of their use. To do this, land area needs to be reserved so that the future availability of the resources is guaranteed. The amount of land area involved is referred to as Embodied Land: land to capture and put to work solar radiation power to avoid decreasing inside system capacity.
5 Resulting in a 0-impact approach for all resources, or the Concept of O . >> maxergy-The concept of O