Zero Village Bergen. Energy system analysis

Abstract

Based on discussions with the project partners, three possible solutions have been investigated for the energy system of Zero Village Bergen:

1. District Heating (DH) 2. Biomass fired Combined Heat and Power (Bio CHP) 3. Ground Source Heat Pump (GSHP)

When comparing the three systems against one another, two sets of key performance indicators are considered: ZEB target and system cost. Furthermore, technical system performance indicators are also calculated, but are not used to compare the systems because either they do not have an implicit goodor-bad value (e.g. thermal capacity) or such value is already embedded in the other indicators.

The results show that, with the conversion factors used in this study, only the Bio CHP system meets the ZEB balance target, actually achieving a slightly negative balance; see Figure below left).

Furthermore, the results show that while the DH system has the highest operational cost (and minimum investment cost) and the Bio CHP system has the highest investment cost (and intermediate operational cost), the two end up having approximately the same global cost. The GSHP system has the lowest operational cost (and intermediate investment cost) and ends up with the lowest global cost; significantly lower than the two other systems; see Figure below right)...