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Design of an Automatic Control Algorithm for Energy-Efficient ...

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8 System <strong>an</strong>d functionality integration 83<br />

calculated.<br />

Based on the relation shown in Figure 2.6 the air quality objective result (����) is<br />

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� <strong>for</strong> ���� ���������<br />

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�<br />

� � ��� � ��� � ����<br />

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� � �<br />

<strong>for</strong> �������� � ���� � ��������<br />

<strong>for</strong> ���� ���������<br />

Carbon dioxide concentration in the cabin [ ���� �<br />

����� ]<br />

(8.19)<br />

����������������� Carbon dioxide concentration limits [ ����� ����� ]<br />

As minimum CO2 concentration the value <strong>for</strong> ambient air, ������ � ��� ����� ����� ,<br />

is taken. As maximum a value <strong>of</strong> ������� � ���� ���� �<br />

�����<br />

will give the highest weight<br />

<strong>of</strong> ����. This value is proposed as a maximum <strong>for</strong> hygienically acceptable air quality<br />

[13]. A comparison with the equation given in the Europe<strong>an</strong> Guidelines <strong>for</strong> Ventilation<br />

Requirements in Buildings [14] is seen in Figure 8.7.<br />

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�� ���� ����� ����� ����� ����� ����� �����<br />

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Figure 8.7: The air quality objective result (���� � ���) compared to the percentage <strong>of</strong><br />

dissatisfied people [14].<br />

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