14 October 2016

Smart Controls for Hybrid Heat Pumps May Solve Grid Congestion

Hybrid heat pumps (i.e. a combination of heat pump and fossil-fired backup heater) have a large and unique
potential for flexibility. By switching to the back-up heater, electricity demand can be completely reduced to zero,
whereas for stand-alone heat pumps, the load can only be shifted in time. Simulations for the Dutch market have
shown that – surprisingly – this feature does not help to a decrease in either heating costs or CO2 emissions. However, hybrid heat pumps turn out to be very helpful in reducing grid congestion and preventing overload.