DOE Abstract v2

DOE Abstract v2

1. Team

   • Selmar Binder
   • Muhammad Faizan
   • Nithin Mallya

2. Referee

   • Prof. Sophia Haussener

3. Objective

   • Optimize the geometry of a calorimetric setup for a PCM (phase change materia) heat storage system during melting and solidification

4. Factors

   • Measurement setup
     • Diameter of measurement cylinder
     • Diameter of insulation
     • Length of sample
     • Length of reference cylinder
     • Position of thermocouples
     • Material of reference cylinder
   • Sample properties (ranges from literature)
     • heat of fusion: hf
     • solid heat capacity: cps
     • liquid heat capacity: cpl
     • solid conductivity: ks
     • liquid conductivity: kl
     • metals/salts/organics
     • density
       • piece wise constant
       • temperature dependant
   • Evaluation method
     • E1: 1-D heat transfer, steady state, interface resistances, temperature dependent properties of reference cylinder
     • E2: E1 + heat loss baseline measurement subtraction
     • E3: E2 + calibration with reference sample/literature values (i.e. Al 99.9999 %)
   • Heating speed
   • Additional randomized errors
     • fluctuating in time
       • Precision of thermocouple
       • Insulation/heat sink boundary temperature (ambient)
       • heating source accuracy
     • constant
       • Reference cylinder machining
       • Thermocouple positioning

5. Response

   • Heat losses through insulation
   • Heat losses through thermocouples
   • Temperature distribution
     • Estimate of sample property according to Evaluation method Ex: P(Ex)
       • Relative error of estimated sample property: (P(Ex) - P) / P
         • minizmize!

6. Model

   • Empirical
     • Linear model
     • Linear model with interactions

7. Strategy

   • Hadamard32
     • determine irrelevant factors
     • fix obvious design parameters
   • (fractional) Factorial design
     • Optimize design parameters of the set up
   • Build Ansys Fluent/Thermo model
     • 3-D heat transfer
     • Accounts for all factors