Experimental and Numerical Analysis of a PCM-Supported ...
Experimental and Numerical Analysis of a PCM-Supported ...
Experimental and Numerical Analysis of a PCM-Supported ...
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5.3 Functional description ................................................................................... 107<br />
5.4 Design <strong>of</strong> experiments <strong>and</strong> potential influences <strong>of</strong> boundary conditions ....... 108<br />
5.5 Results <strong>and</strong> discussions ............................................................................... 111<br />
5.5.1 Behavior <strong>of</strong> the <strong>PCM</strong>-supported HDH cycle ........................................ 113<br />
5.5.2 Comparison between conductive <strong>and</strong> non conductive packing ........... 117<br />
5.5.3 Effect <strong>of</strong> packing specific area ............................................................ 121<br />
5.6 Conclusions .................................................................................................. 123<br />
6 Model Implementation <strong>and</strong> Validation................................................................. 125<br />
6.1 Implementation <strong>of</strong> the evaporator model with MATLAB ................................ 125<br />
6.2 Solution <strong>of</strong> the HDH plant lumped model ...................................................... 127<br />
6.3 Model validation ............................................................................................ 128<br />
6.4 Sample <strong>of</strong> simulation results ......................................................................... 136<br />
6.5 Conclusions .................................................................................................. 137<br />
7 Parameters <strong>Analysis</strong> <strong>of</strong> the Evaporator <strong>and</strong> Condenser ..................................... 141<br />
7.1 Boundary conditions ..................................................................................... 141<br />
7.2 Evaporator Performance ............................................................................... 142<br />
7.2.1 Effect <strong>of</strong> packing size .......................................................................... 142<br />
7.2.2 Effect <strong>of</strong> column aspect ratio ............................................................... 145<br />
7.2.3 Effect <strong>of</strong> inlet hot water temperature ................................................... 147<br />
7.2.4 Effect <strong>of</strong> inlet saturated air temperature .............................................. 148<br />
7.2.5 Effect <strong>of</strong> water to air flow ratio ............................................................. 149<br />
7.2.6 Effect <strong>of</strong> packing thermal conductivity ................................................. 150<br />
7.2.7 Concluding remarks ............................................................................ 154<br />
7.3 Condenser Performance ............................................................................... 154<br />
7.3.1 Effect <strong>of</strong> inlet cooling water temperature ............................................. 154<br />
7.3.2 Effect <strong>of</strong> inlet saturated air temperature .............................................. 155<br />
7.3.3 Effect <strong>of</strong> cooling water to air mass flow ratio ....................................... 156<br />
7.3.4 Effect <strong>of</strong> packing thermal conductivity ................................................. 157<br />
7.3.7 Concluding remarks ............................................................................ 160<br />
7.4 Conclusions .................................................................................................. 161<br />
8 Optimization <strong>of</strong> HDH plant ................................................................................... 163<br />
8.1 Geographical locations ................................................................................. 163<br />
8.2 Boundary conditions <strong>and</strong> input parameters ................................................... 163<br />
8.3 Parametric <strong>Analysis</strong> ...................................................................................... 164<br />
8.3.1 Effect <strong>of</strong> brine concentration factor (r c ) ................................................ 166<br />
8.3.2 Effect <strong>of</strong> thermal buffer storage capacity ............................................. 167<br />
8.3.3 Effect <strong>of</strong> solar collector area ............................................................... 168<br />
8.3.4 Effect <strong>of</strong> hot water flow rate ................................................................ 169<br />
8.3.5 Effect <strong>of</strong> cooling water flow rate .......................................................... 170<br />
8.3.6 Effect <strong>of</strong> storage medium type ............................................................ 170<br />
8.3.7 Effect <strong>of</strong> <strong>PCM</strong> melting temperature (T m ) ............................................. 174<br />
8.4 Conclusions .................................................................................................. 176<br />
9 Summary <strong>and</strong> conclusions .................................................................................. 177<br />
9.1 Summary ...................................................................................................... 177<br />
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