Booosting gt bcongres 8juni12_bart_kolkman

367 views
304 views

Published on

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
367
On SlideShare
0
From Embeds
0
Number of Embeds
43
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide
  • A concept design in the form of a portable cabin was developed. The concept design should comply with the criteria:Regulate internal temperature around 20°C.Provide fresh air to the interiorProvide 50 Watts electric power to internal appliancesOperate stand-alone in the Dutch climateProof of principle, therefore some design simplifications where made:No doorsNo habitantsNo external shading
  • Booosting gt bcongres 8juni12_bart_kolkman

    1. 1. ACTIVE BUILDING ELEMENTS WITH PCMGRADUATION PROJECT: THERMAL SIMULATION OF AN ENERGYNEUTRAL BUILDING CONCEPT. IR. BART KOLKMAN
    2. 2. CONTENT Introduction Concept design Model development Development of simulation software Optimizations and results Conclusions Active building elements with pcm 8-June-2012
    3. 3. INTRODUCTION Reduction of energy consumption of buildings Smart energy storage and release Using PCM materials Material without phase change Temperature Heat of fusion PCM Stored heat Active building elements with pcm 8-June-2012
    4. 4. INTRODUCTION Reduction of energy consumption of buildings Smart energy storage and release Using PCM materials Simulation of buildings using PCM in walls Active building elements with pcm 8-June-2012
    5. 5. CONCEPT DESIGN OF BUILDING Ventilation box Walls (Thermal or PV) Module Window with shutter Battery Internal heat +- Heat flows Basin Active building elements with pcm 8-June-2012
    6. 6. WALL DESIGN Thermal collector Combined thermal + PV collector Internal External air air Photo- voltaic material PCM/water Aluminum plate layer Isolation with water channels Active building elements with pcm 8-June-2012
    7. 7. ENVIRONMENTAL VARIABLESDutch weather conditions Solar irradiance External air temperature, wi nd speed and direction Ground Internal solar irradiance temperature Active building elements with pcm 8-June-2012
    8. 8. MODEL DEVELOPMENTWALL 1D FINITE ELEMENT MODEL Thermal masses Resistances Dynam icWallModel Active building elements with pcm 8-June-2012
    9. 9. MODEL DEVELOPMENTWALL 1D FINITE ELEMENT MODEL Active building elements with pcm 8-June-2012
    10. 10. MODEL DEVELOPMENTWALL 1D FINITE ELEMENT MODEL Active building elements with pcm 8-June-2012
    11. 11. SIMULATION SOFTWAREComposition of:1. Thermal model  Thermal state of walls and internal volume, based on previous state2. Shape model  Defines the shape en position of walls, window, etc.  Calculation of external influences on the model (wind, solar irradiance)  Calculation of shined areas through window3. Controller  Heating and cooling of thermal masses, functioning of the ventilation box and window shutter Active building elements with pcm 8-June-2012
    12. 12. RESULTS Active building elements with pcm 8-June-2012
    13. 13. RESULTSOptimization of design for: Heat collection Passive heating of the interior Heat storage Electricity storageFine-tuning of model by various simulations Active building elements with pcm 8-June-2012
    14. 14. OPTIMIZATIONS OF HEAT COLLECTIONOptimization parameters: Choice of:  black anodized aluminum or  selective absorber surface material Optional glass cover Efficient collectors are essential to have enough heat generation in the spring and autumn, minimizing the need for thermal storage. Uncovered collectors have too low efficiencies at low external temperatures Selective absorber material is performing better, especially at lower irradiation levels Active building elements with pcm 8-June-2012
    15. 15. OPTIMIZATION OF PASSIVE HEATINGOptimization parameters: Window area. [1 m2, 2 m2, 4 m2] PCM thickness of inner wall. [10 mm, 20 mm, 30 mm] Increased window area and PCM thickness gives lower heating requirements and reduced maximal temperatures Active building elements with pcm 8-June-2012
    16. 16. OPTIMIZATION OF HEAT STORAGEOptimization parameters: Basin height. [0.1 m, 0.3 m, 0.5 m] Basin isolation thickness. [200 mm, 100 mm] Basin internal material. [Water, PCM] Small water basin can be used but results in high storage temperatures and thereby high losses. Use of 3 cm PCM is sufficient, and also reduces the conduction losses due to the lower storage temperatures. Active building elements with pcm 8-June-2012
    17. 17. OPTIMIZATION OF ELECTRICITY STORAGEVariables: Battery capacity Battery efficiency Inclination of the roof [0°, 17°,35°] The production per month exceeds the consumption. An efficient storage system is essential. Inclination of the roof increases the electric yield, but reduces the thermal performance of the building and is therefore not ideal. Active building elements with pcm 8-June-2012
    18. 18. FINE-TUNING OF MODELLONGER SIMULATION PERIOD AND FINE-TUNING  Simulation over a longer period (multiple years)  More thermal and electric capacity is sometimes required.  Replacement of PCM/water layer by pure PCM for some sides. Active building elements with pcm 8-June-2012
    19. 19. CONCLUSIONS Both practical and theoretical approach Satisfying results for inside temperature PCM in basin and walls gives good opportunities for energy reduction Integrated solution with:  Control system  Different energy resources  Smart storage and release of energy Active building elements with pcm 8-June-2012
    20. 20. CURRENT WORK AREA Development of simulations for various applications Obtain integrated solutions for multi-variable problems THANK YOU FOR YOUR ATTENTION Active building elements with pcm 8-June-2012

    ×