Analysis of ground-source heat pumps in north-of-England homes

YesThe performance of Ground Source Heat Pump (GSHP) systems for domestic use is an increasing area of study in the UK. This paper examines the thermal performance of three bespoke shallow horizontal GSHP systems installed in newly built residential houses in the North of England against a control house which was fitted with a standard gas boiler. A total of 350 metres of High Density Polyethylene pipe with an external diameter of 40 mm was used for each house as a heat pump loop. The study investigated (i) the performance of a single loop horizontal Ground Heat Exchanger (GHE) against a double loop GHE and (ii) rainfall effects on heat extraction by comparing a system with an infiltration trench connected to roof drainage against a system without an infiltration trench above the ground loops. Parameters monitored for a full year from October 2013 to September 2014. Using the double GHE has shown an enhanced performance of up to 20% compared with single GHE. The infiltration trench is found to improve performance of the heat pumps; the double loop GHE system with an infiltration trench had a COP 5% higher than that of the double loop GHE system without a trench

Are consumers willing to switch to smart time of use electricity tariffs? The importance of loss-aversion and electric vehicle ownership

Smart time of use tariffs are a key part of most government’s strategies to ensure our future electricity supply is clean, affordable and secure – but will consumers be willing to switch to them? This paper presents the results of a survey experiment conducted on a nationally representative sample of 2020 British energy bill payers. The data suggests that over a third of bill payers are in favour of switching to a 3-tiered smart time of use tariff, indicating a sizeable potential market for these tariffs. There is substantial variation in willingness to switch, driven by differences in loss-aversion and ownership of demand flexible appliances rather than standard socio-economic/demographic factors. This is the first time loss-aversion has been measured amongst energy bill payers and the results suggest loss-aversion is likely to stifle consumer uptake; 93% of bill payers are loss-averse (care more about avoiding financial losses than making savings) and loss-averse people are substantially less willing to switch to the time of use tariff (p < 0.001). A randomised control trial finds that loss-framed messages are unlikely to overcome loss-aversion to boost uptake. Marketing campaigns tailored towards electric vehicle owners, who were significantly more willing to switch, could increase uptake during and after the smart meter roll-out