Paper Conference

Proceedings of BSO Conference 2020: Fifth Conference of IBPSA-England


Techno-economic Feasibility Of Replacing Oil Boilers With Air-To-Water-Heat-Pumps Coupled With Thermal Energy Storage

Paraskevi Vatougiou, David P. Jenkins, Peter McCallum

Abstract: The increasing share of renewables in electricity generation establishes heat pumps as a high potential alternative to fossil-fuel based heating systems. However, a large-scale roll-out of heat pumps might be challenging for the stability of the current electricity grid. In this context, Thermal Energy Storage (TES) supporting heat pumps is identified as a means to balance the mismatch of energy supply and demand through the increase of demand-side flexibility. Using dynamic simulations, this paper studies the heating performance of this coupling technology under a tariff-based load-shifting strategy. The objective of this work is to investigate the extent to which the dwelling’s thermal storage capacity and occupancy pattern can balance the required TES volume in order for domestic heating loads to be shifted to lowtariff periods of the day. The results show that the required TES volume to minimise AWHP’s operation during peak hours varies from 0.4 m³ to 1.5 m³ depending on the storage capacity of the building itself and household profile. Compared to oil-fired boilers, heat pumps could obtain a reduction of running costs in the range of 13%55% depending on the boiler efficiency as well as the operation regime of the heat pump and electricity tariff used.
Pages: 32 - 39