Page 31 - RSB Annual Report 2019 English Final

Because CLDs are rarely adjusted once a DC scheme is established, there is little difference from year to year in the average load. There is an opportunity for DC providers to offer reductions in contracted loads where it is evident that customers have no need of the capacities contracted to them. DC providers may then contract that load to new customers. Three of the six most energy efficient plant are reporting for the first year. The average efficiency of the six best plant was 0.76kWh/ TRh, well ahead of the 2030 energy efficiency target of 0.82kWh/TRh. At the other end of the scale, the average efficiency of the six worst performing plant was 1.51kWh/TRh. The wide range of performance, with some plant operating no better than standard direct expansion units, highlights the need for some companies to redouble their efforts in driving energy efficiency in their operations. Energy efficiency for the sector overall remained at 0.90kWh/TRh. Five additional thermal energy storage plant reported in 2019, of which three were newly commissioned and two were from a company’s first return. Those additions brought the total number of thermal energy storage facilities to 14. With the increased contribution of solar PV to the energy mix, supply and demand for electricity become more aligned. Indeed, solar output alone may outstrip demand at peak times in the years to come. This may lead to load management strategies very different to those traditionally adopted. Cooling Load Density 300 200 100 0 Annual Report 2019 2014 2015 2016 Range 2017 2018 Average 2019 Figure 13 21 16 11 6 2014 2015 2016 Range 2017 2018 2019 Average Electrical efficiency Figure 14 15% 10% 5% 0% 2012 2013 2014 2015 2016 2017 2018 2019 Figure 15 Cooling Output from TES RSB 31 % of Output from TES plant SEER W/m2