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Jim van Oosten

978 days ago
Unfiled. Edited by Jim van Oosten 978 days ago
Jim O Research Plan Energy
  •  Reach      energy Neutral 
  •   Maximize       energy production
  • Minimize use
  • Allow energy exchange       between entities
  • Have short time storage  
  • Investigate overseason       energy storage
  • Max EPC 0.4
  •  Reduce Grid      inputs
  •   Why?
  • Make system      'smart'/Innovative    
  • Use of DC       grid?
  • Other Smart grid tech?
  • Hydrogen production?
  • Redox Flow batteries?
  • Addaptability: With technologie developing very rapidly, buildings      could be outdated as soon as they are built. The only whay to make an      innovative building is to make it suitable for EASILY retrofitting new      techniques. Especially for software based innovations (hardware based      innovations are less likely to be implemented due to additional      investments and high costs for labour. TakeTesla cars as an example. 
  • For      example:
  • Software       of installations (PV inverters, BMS, heat pumps etc.) should be       reprogrammable / managable externally 
  • Barriers:
  • Seemingly        complexity (it may be less complex than it looks   
  • Privacy / legistlation      
  • --> Some part of the      management system needs to be centrally organised/
  • Creating incentives for      energy reduction / DSM
  • Dynamic Pricing:  The local grid       has a virtual 'price' on which bases the management decides how/when       energie is produced/used/stored/sold. Works according to the same       principle as APX stock market?
978 days ago
Unfiled. Edited by Jim van Oosten 978 days ago
Jim O Research Plan DC Grid
Research Questions:
How much energy is saved (kWh/m2/Yr) by having a DC-grid?
  •  Which      portion of energy is used by DC-based appliances?
  •  Which portion of nergy is      provide directly by DC-sources and how much by AC?
  •  What is the avarage      conversion loss due to DC-AC / AC-DC conversion?
  •     DC-AC       (Micro PV inverter): 95.7%
  •   What is the energy loss due      to DC-DC step down converters?
  • ~350V       --> 5V-60V(!) USB
  • What is the working voltage?
  •     Project in       Tjech uses 3500 volt for distribution (+/-) and 2 x 350 in the buildings       (+/-) the two lines can be added up to 700V. 350 V is "compatible" with  230V AC.
Pros DC
  •  Less    current due to the absance of reactive power (important with regulators used in LEDs!)
  •  -->Longer cables possible
  •  Ring-shaped grids possible      --> easier to make bypasses from different 'neighbourhoods' or 'power      units'
978 days ago
Unfiled. Edited by Jim van Oosten 978 days ago
Jim O EPC 
Jim O
  • Please correct if wrong//
EPC Main Criteria:
  •  Energy use      / m2
  •  Related CO2 emissions
--> EPC       0 = 0 zero emissions
Main critique EPC: (we n eed to work with it, but I think its also good to think about the flaws so that we don't stuck on the EPC for our results)
  • The ability      to compensate between energy savings / production and use of certain      technologies (without a proof o a good functioning of those technologies)      leads to undesirable trade-offs: "eg. bad insulation can be      compensated by PV."
  • The EPC is theoretical, so      the actual energie performance is not tested.
  • The calculation per square      meter (kWh/Yr) leads to looser rules for bigger houses. 
  • Focus on R/U values is      overrated: you won't get zero emissions with just meters of insulation
  • Focus on energy use in the      user phase, not in production phase?

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