Introduction

During the compute design flows action, we propagate power, design flow and temperature regimes.

When two branches come together, we propagate the individual parts :

1. domestic hot water (DHW)

2. heating prioritised by DHW (e.g. when HIU’s are applied)

3. heating not prioritised by DHW (e.g. when electric heaters are applied)

On top of these propagated individual parts, we will apply aggragation, as explained in Step 6 : aggregation of the DHW flow/power with the CH flow/power

Below we explain how the DHW part is propagated, but a similar algorithm applies to heating prioritised by DHW and heating not prioritised by DHW.

Propagation of the DHW part

In the example below we propagate two flows

• flow 1, with total power P1, diversity flow v1, and diversity factor