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basics:energy_and_ecology:primary_energy_quantifying_sustainability [2015/09/16 23:29] – [In the Passive House] wfeistbasics:energy_and_ecology:primary_energy_quantifying_sustainability [2020/08/09 13:50] (current) – [Primary energy – quantifying sustainability] wfeist
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 The primary energy demand determines the impact on the environment. To be more exact: The primary energy demand determines the impact on the environment. To be more exact:
-  * The total primary energy demand from non-renewable energy sources that is supplied to the building ((**There are many environmental effects of the use of energy**: consumption of resources, pollution of the atmosphere with harmful substances (e.g. CO<sub>2</sub>, greenhouse gases), contamination of the water and soil (e.g. with radioactive waste materials), damage to the environment etc. At the moment, it is not possible to weigh up the various effects against one another and to adjust the risks quantitatively in relation to each other. **It is undoubtedly indisputable that there are very serious risks involved in each case** (climate change, proliferation of nuclear weapons, safety of future generations with regard to storage of nuclear waste).\\ **With renewable energy sources and energy efficiency, there are no risks of this magnitude** - at least, as long as attention is focussed on sustainable use (no deforestation for the purpose of obtaining fuel). **Within this context, the non-renewable demand for primary energy is currently the best quantifying factor for the overall damage to the environment through energy use. Using solely CO<sub>2</sub> as a parameter for this purpose plays down the other risks and the significance of the resource situation.** Incidentally, this quantification approach is also becoming increasingly popular with other authors. The fact that non-renewable energy sources are, to a great extent, usually quickly substitutable by each other also speaks for this assessment– if certain risks become apparent, a widespread substitution effect should be expected. Today we do not know exactly which primary energy carriers (oil, gas, coal or uranium) actually will be used predominantly in thirty years' time – evaluation of the total primary energy applied will provide security against this additional uncertainty.))+  * The total primary energy demand from non-renewable energy sources that is supplied to the building ((**There are many environmental effects of the use of not renewable energy**: consumption of limited resources, pollution of the atmosphere with harmful substances (e.g. CO<sub>2</sub>, other greenhouse gases), contamination of the water and soil (e.g. with radioactive waste materials), damage to the environment etc. At the moment, it is not possible to weigh up the various effects against one another and to adjust the risks quantitatively in relation to each other. **It is undoubtedly indisputable that there are very serious risks involved in each case** (climate change, proliferation of nuclear weapons, safety of future generations with regard to storage of nuclear waste).\\ **With renewable energy sources and energy efficiency, there are no risks of this magnitude** - at least, as long as attention is focussed on sustainable use (no deforestation for the purpose of obtaining fuel). **Within this context, the non-renewable demand for primary energy is currently a good quantifying factor for the overall damage to the environment through conventional energy use. Using solely CO<sub>2</sub> as a parameter for this purpose plays down the other risks and the significance of the resource situation.** Incidentally, this quantification approach has also become increasingly popular with other authors. The fact that non-renewable energy sources are, to a great extent, usually quickly substitutable by each other also speaks for this assessment– if certain risks become apparent, a widespread substitution effect should be expected. Today we do not know exactly which primary energy carriers (oil, gas, coal or uranium) actually will be used predominantly in the next decades – evaluation of the total primary energy applied will provide security against this additional uncertainty. In the future, however, at some time the energy will be generated more and more from renewable sources - and this will change the picture completely. After all, the risks and the environmental damage from renewable energy is far lower than these from fossil or nuclear sources - but we can not neglect, that renewable energy also needs resources (e.g. land use). The impact can be kept really small, as long as the overall renewable energy to be used is in a fair relation to the planetary resources. To have a measure for this, the passive house institute introduced the [[:certification:passive_house_categories:per|"primary energy renewable" PER]] as a new assessment method. 
 +\\ 
 +)) 
   * for all energy uses arising in the building,   * for all energy uses arising in the building,
 +
   * thus also for the household electricity in a residential house (shown in “yellow” in the following illustration).    * thus also for the household electricity in a residential house (shown in “yellow” in the following illustration). 
-//Note: the current calculation method of the Energy Saving Regulations (EnEV) does not take the domestic electricity into account//.\\+//Note 1: the current calculation method of the Energy Saving Regulations (EnEV) does not take the domestic electricity into account//.\\ 
 +//Note 2: The world is furtunately substituting more and more not renewable energy sources by renewable energy sources. These source do have much less dangerous environmental impacts; but these also need some limited resources (e.g. land use). In the future, it will become more and more important, to design an energy system in a way, that the renewable energy generation can be kept within sustainable limits. This is, what the new [[:certification:passive_house_categories:per|"primary energy renewable" PER]] method has been developed for. 
 +//\\
 \\ \\
 |{{ :picopen:primaerenergiekennwertvergleich_k.png?390 }}| |{{ :picopen:primaerenergiekennwertvergleich_k.png?390 }}|
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 //**What is being compared?**\\ //**What is being compared?**\\
 ->  **For the “existing building“ category ** with the average consumption of buildings from the construction year categories before 1984.\\ ->  **For the “existing building“ category ** with the average consumption of buildings from the construction year categories before 1984.\\
-->  **For the “WschVO 84” category** (Thermal protection regulation) with the requirement standard set there (unfortunately there are no statistics for the actual consumption values, these are presumably higher because the regulations haven not taken into account some important facts and because construction is simul taneously becoming more "complicated"). [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Eschenfelder 1999] ]]\\+->  **For the “WschVO 84” category** (Thermal protection regulation) with the requirement standard set there (unfortunately there are no statistics for the actual consumption values, these are presumably higher because the regulations haven not taken into account some important facts and because construction is simultaneously becoming more "complicated"). [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Eschenfelder 1999] ]]\\
 ->  **For the "WSchVO 1995" category** with the requirement standard set there (same problem with statistics here).\\ ->  **For the "WSchVO 1995" category** with the requirement standard set there (same problem with statistics here).\\
 ->  ** For the "EnEV 2002" category ** with the requirement standard set there (same problem with statistics here).\\ ->  ** For the "EnEV 2002" category ** with the requirement standard set there (same problem with statistics here).\\
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 Two important stages can be identified: Two important stages can be identified:
   * The first stage of heating energy savings from a typical old building to the "EnEV", which was divided into three separate steps (1984, 1995 and 2002).   * The first stage of heating energy savings from a typical old building to the "EnEV", which was divided into three separate steps (1984, 1995 and 2002).
 +
   * And the second stage of heating energy savings from the EnEV house to the Passive House, which is particularly interesting because not only is energy being saved, but also the whole system becomes more simpler, more comfortable and crisis-proof. Of course, also domestic electricity should be efficiently used in a Passive House.\\   * And the second stage of heating energy savings from the EnEV house to the Passive House, which is particularly interesting because not only is energy being saved, but also the whole system becomes more simpler, more comfortable and crisis-proof. Of course, also domestic electricity should be efficiently used in a Passive House.\\
 \\ \\
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 Grey energy has not been dealt with here. Of course, energy expenditure also plays a role for the creation of a building: the** primary energy input for production (PEI)**. This has been systematically examined in two publications and set in relation to the operating energy input [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Feist 1997] ]], [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Mossmann, Kohler 2005] ]]. This has been put together on the following internet page: [[Basics:Energy and ecology:Embodied energy and the Passive House Standard]]. This much in advance: Grey energy has not been dealt with here. Of course, energy expenditure also plays a role for the creation of a building: the** primary energy input for production (PEI)**. This has been systematically examined in two publications and set in relation to the operating energy input [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Feist 1997] ]], [[Basics:Energy and ecology:Primary energy – quantifying sustainability#Literature|[Mossmann, Kohler 2005] ]]. This has been put together on the following internet page: [[Basics:Energy and ecology:Embodied energy and the Passive House Standard]]. This much in advance:
     * Most of the grey energy is used for the production of the building materials.  Lasting and continuing usability are the main factors for the energy efficiency of building performance.     * Most of the grey energy is used for the production of the building materials.  Lasting and continuing usability are the main factors for the energy efficiency of building performance.
 +
     * The energy expenditure for the production of a (otherwise identical) Passive House is not necessarily greater than that of an ordinary new construction; it can even be less. The "primary energy investment" amortises very quickly, in less than a year as a rule. The additional financial investments don't pay back so quickly unfortunately, but they are still worth it. See [[Basics:Affordability]].\\     * The energy expenditure for the production of a (otherwise identical) Passive House is not necessarily greater than that of an ordinary new construction; it can even be less. The "primary energy investment" amortises very quickly, in less than a year as a rule. The additional financial investments don't pay back so quickly unfortunately, but they are still worth it. See [[Basics:Affordability]].\\
 \\ \\
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-===== See also ===== 
- 
-[[basics:energy_and_ecology:primary_energy_quantifying_sustainability|Primary energy – quantifying sustainability]]\\ 
-\\ 
  
  
basics/energy_and_ecology/primary_energy_quantifying_sustainability.1442438970.txt.gz · Last modified: 2015/09/16 23:29 by wfeist