Sustainable heat solutions for Katwijk. Mapping potential sustainable sources and costs of heating technologies

To support the heat transition in Katwijk and identify possible routes to a zero-gas future, CE Delft has identified potential sustainable heat sources and established the cost of suitable heating technologies. The municipality is to use the results as input for its Heat Transition Vision and Local Energy Strategy, indicating how they propose to flesh out the energy transition in terms of both heat and power.

In technical terms, the potential sustainable heat sources can cover 270% of current heat demand in the built environment. While thermal energy from surface waters has major technical potential, it is very low-temperature heat, implying high, unprofitable investments. LT heat is also often unsuitable for transport over any great distance. In Katwijk, LT waste heat has little technical potential. The substrate is very suitable for heat/cold storage systems and can be utilised in combination with LT sources. Geothermal and HT waste heat from the WarmtelinQ grid can cover a significant portion of current demand. HT heat can be efficiently transported and therefore has major potential for use here, depending on the business case.

For seven neighbourhoods, in 2050 there is very little difference in national costs between electrical heat pumps and an MT/HT heat grid. For most, though, electrical heat pumps are by then the cheaper option, with a cost difference of over 25% in six of them.