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Background

Integrated Heat Air & Moisture Modeling A.W.M. (Jos) van Schijndel Technische Universiteit Eindhoven. Background. Building Physics and Systems Thermal Comfort Durability Energy Preservation Building Interior Economics. Example 1 : Thermal Comfort, convector.

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  1. Integrated Heat Air & Moisture ModelingA.W.M. (Jos) van SchijndelTechnische Universiteit Eindhoven

  2. Background • Building Physics and Systems • Thermal Comfort • Durability • Energy • Preservation • Building • Interior • Economics

  3. Example 1 : Thermal Comfort, convector PDE : Navier-Stokes + Buoyancy

  4. Example 1 : Thermal Comfort , convector PDE : Navier-Stokes + Buoyancy

  5. Durability of constructions Heat , Air & Moisture (HAM) transport

  6. PROJECT

  7. Example 2 Durability : 2D Moisture transport PDE : Coupled Heat & Moisture

  8. Example 3 Durability : wind and rain around a building PDE : Navier-Stokes + k-eps + trajectories

  9. Example 4 Durability: 3D Thermal construction PDE : Navier-Stokes + Buoyancy

  10. Multi scale coupling Detail (scale 0.01 m) Whole Building (scale 10 m) Coupled [Abocad] [Abocad] Coupling? Global building model Local model

  11. Problem Coupling • External • Multiple software programs • BPS Research of Hensen et al. • Internal • Single software: MatLab • BPS Research of Schijndel et al.

  12. simulation environment: SimuLink • Coupling of models

  13. HAMLab, whole building (global) • New Hybrid modeling approach • Both discrete and continuous • Discrete: climate related • Continuous: indoor air related • Accurate results for both time scales (hour & seconds) • Efficient calculation time

  14. HAMLab, whole building, exampleAnnex 41 validation study

  15. SimuLink using S-functions, Example (Heat Pump Model) 1/2

  16. SimuLink using S-functions, Example (Heat Pump Model) 2/2 %t = time %u(1)=Tvin %u(2)=Fvin %u(3)=Tcin %u(4)=Fcin %u(5)=Ehp %u(6)=k [-] % %x(1)=Tvout %x(2)=Tcout function sys=mdlDerivatives( t, x, u) Tvm=(u(1)+x(1))/2; Tcm=(u(3)+x(2))/2; COP=u(6)*(273.15+Tcm)/(Tcm-Tvm); .. xdot(1)=(1/Cv)*(u(2)*cv*(u(1)-x(1))-(COP-1)*u(5)); xdot(2)=(1/Cc)*(u(4)*cc*(u(3)-x(2))+COP*u(5)); ..

  17. Case study: energy roof systemIntroduction

  18. Case study: energy roof systemValidation Heat Pump Model

  19. Case study: energy roof systemValidation Energy Roof Model

  20. Case study: energy roof systemValidation TES

  21. Case study: energy roof systemComplete including Controllers 1/3

  22. Case study: energy roof systemComplete including Controllers 2/3

  23. Case study: energy roof systemComplete including Controllers 3/3

  24. GOAL: preservation of the original paper fragments (Note: nearly 1 million visitors per year) HAMLab, HVAC & primary systems, exampleHVAC & Indoor air simulation of museum

  25. HAMLab, HVAC & primary systems, exampleHVAC & Indoor air simulation of museum 100% of time out of limits!

  26. HAMLab, HVAC & primary systems, exampleHVAC & Indoor air simulation of museum

  27. HAMLab, HVAC & primary systems, exampleHVAC & Indoor air simulation of museum

  28. HAMLab, HVAC & primary systems, exampleHVAC & Indoor air simulation of museum OK !

  29. Airflow modeling, geometry and boundaries The boundary conditions are: At the left, right, top and bottom walls: u=0, v=0, T=0. At the inlet: u=1, v=0, T=1. At the outlet : Neuman conditions for u,v and T

  30. PDEs and FemLab model

  31. Air temperature with low inlet velocity Re =50 , Gr =0

  32. Air temperature with high inlet velocity Re =1000 , Gr =0

  33. Air temperature with high inlet velocity & buoyancy Re =1000 , Gr =2.5e7

  34. Validated result Simulation

  35. Implementation in S-Function, target

  36. Implementation in S-Function

  37. Implementation in S-Function

  38. Schade: sleeplade

  39. Schade: inwendige constructie

  40. Schade: scheuren pedaallade

  41. Complete Simulink model

  42. Indoor climate SimuLink model

  43. Indoor climate model, validation

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