Design of an Automatic Control Algorithm for Energy-Efficient ...
Design of an Automatic Control Algorithm for Energy-Efficient ...
Design of an Automatic Control Algorithm for Energy-Efficient ...
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10 Hardware <strong>an</strong>d characteristics <strong>of</strong><br />
the MUTE prototype<br />
The developed climate control concept is realised <strong>for</strong> the use in the TU München’s electric<br />
car prototype. The car will be small, low-cost, but implement new ideas, as described in<br />
Chapter 9. There<strong>for</strong>e, some hardware will not be included due to the budget <strong>an</strong>d/or the<br />
weight restriction.<br />
10.1 The car interior<br />
The car is built up upon <strong>an</strong> aluminium frame with a body made out <strong>of</strong> carbon fibre<br />
laminate. The main parts (ro<strong>of</strong>, floor) consist <strong>of</strong> two �����strong layers with ���air in<br />
between. The windscreen <strong>an</strong>d the side windows are made out <strong>of</strong> ���� �� thick laminated<br />
safety glass. The rear windows material is approximately ��� thick polycarbonate.<br />
A geometrically simplified model (Figure 10.1) has been derived from the CAD<br />
data <strong>for</strong> simulation <strong>an</strong>d parameter estimation purposes. The air volume in the cabin is<br />
approximately �� � , the windscreen has a surface <strong>of</strong> ���� � � . The overall surface <strong>of</strong> the<br />
model is ����� � , ���� � <strong>of</strong> which are windows.<br />
The thermal conductivity <strong>of</strong> carbon fibre rein<strong>for</strong>ced plastics (CFRP) depends a<br />
lot on the structure <strong>of</strong> the laminate <strong>an</strong>d the used matrix <strong>an</strong>d fibre materials. Since<br />
it will be much higher th<strong>an</strong> the one <strong>of</strong> the air in between it c<strong>an</strong> be neglected <strong>for</strong> <strong>an</strong><br />
estimation, though. For the safety glass, the thermal characteristics <strong>of</strong> normal glass (found<br />
in Appendix A) are assumed. The heat tr<strong>an</strong>sferbetween the cabin <strong>an</strong>d the ambient air<br />
depends on the air speed on the surfaces <strong>an</strong>d the geometry as described in Section 3.1.1.<br />
For <strong>an</strong> existent car measurements could be made finding the coefficients <strong>an</strong>d implement
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