Table 7 Details of G36-Degrad fouling fault scenarios.
From: Labeled Datasets for Air Handling Units Operating in Faulted and Fault-free States
Fault type | Fault intensity | Method of fault imposition | |
|---|---|---|---|
Heat transfer coefficient decrease rate | Pressure drop increase rate | ||
Cooling coil airside fouling | 7%/yr | 30%/yr | 1) Modifying the pressure drop equation from \(\dot{m}=k.\sqrt{\triangle p}\) to \(\triangle p={{coef\_f}}_{{dp}}.\frac{1}{{k}^{2}}.{\dot{m}}^{2}\) by introducing a time-dependent pressure drop coefficient (coef_fdp). 2) Modifying the convection heat transfer rate equation from \(\dot{Q}={U}_{{air}}.\triangle T\) to \(\dot{Q}={{{coef\_f}}_{{HT}}.U}_{{air}}.\triangle T\) by introducing a time-dependent heat transfer degradation coefficient (\({{coef\_f}}_{{HT}}\)). |
14%/yr | 200%/yr | ||
Condenser waterside fouling* | 4%/30 days | 250%/30 days | 1) The same pressure drop equation modification as above. 2) Directly applying fouling effect on heat transfer to heat flux through \({\dot{Q}}_{{condensor},{f}}={{coe}{f}_{f}}_{{HT}}.{\dot{Q}}_{{condensor},{c}},\) where \({\dot{Q}}_{{condensor},{f}}\) and \({\dot{Q}}_{{condensor},{c}}\) represent the heat transfer rates of the condenser under the fouled and the clean conditions, respectively. |
28%/30 days | 50%/30 days | ||
