Air-Water Heat Pump

The cost of the component was explained in component costs or emissions page. The reference size is the nomimal power \(\dot{Q}_{Air-HP,nom}\). The heat flow of the air-water heat pump must be below the nominal power multiplied by a constant or a time-dependent factor as follows:

\[\dot{Q}_{Air-HP,h} + \dot{Q}_{Air-HP,c} +\frac{\dot{Q}_{Air-HP,c}}{COP_c^t} \leq f_{Air-HP} \cdot \dot{Q}_{Air-HP,nom}^{[\frac{t}{l_{yr}}]}\]

The electrical demand is calculated with a constant or time-dependent coefficient of performace:

\[P_{Air-HP,h} = \frac{\dot{Q}_{Air-HP,h}}{COP_h^t} + \frac{\dot{Q}_{Air-HP,c}}{COP_c^t}\]

When a minimum power or a binary power is considered, the following equations are applied:

\[\dot{Q}_{Air-HP,h} + \dot{Q}_{Air-HP,c} +\frac{\dot{Q}_{Air-HP,c}}{COP_c^t} \leq \infty \cdot b_{Air-HP}^t\]

\[\dot{Q}_{Air-HP,h} + \dot{Q}_{Air-HP,c} +\frac{\dot{Q}_{Air-HP,c}}{COP_c^t} \geq \dot{Q}_{Air-HP,nom}^t\]

with:

\[\dot{Q}_{Air-HP,on} + \dot{Q}_{Air-HP,off} = f_{min} \cdot f_{Air-HP}^t \cdot \dot{Q}_{Air-HP,nom}^{[\frac{t}{l_{yr}}]}\]

\[\dot{Q}_{Air-HP,on} \leq \infty \cdot b_{Air-HP}^t\]

\[\dot{Q}_{Air-HP,off} + \infty \cdot b_{Air-HP}^t \leq \infty\]