The impact of large-scale thermal energy storage in the energy system

A Review of Possibilities and Challenges of Pit Thermal Energy Storages in Swedish District Heating Networks

“…For district heating companies, several additional benefits follow energy storage implementations such as load fluctuation resilience and dynamic electricity production [9]. The operating temperature for Danish PTES typically range between 40-90 ˚C, making it ideal for future implementation in the low temperature 5GDHC grid [31].…”

“…[18], [38], [38] Integration of renewables Thermal energy storage is regarded as a promising technology for integration of renewable energy sources, assisting in counteracting the intermittency of solar and wind power. [31], [39] 5GDHC ready Heat storages constitute fundaments in 5 th generation district heating having a 100% renewable energy target. [31], [38], [40] Peak shaving PTES help reduce the dependency of fossil fuels and other expensive fuels during periods of high heat demand.…”

“…[31], [39] 5GDHC ready Heat storages constitute fundaments in 5 th generation district heating having a 100% renewable energy target. [31], [38], [40] Peak shaving PTES help reduce the dependency of fossil fuels and other expensive fuels during periods of high heat demand. CHP plants may be operated more smoothly increasing lifespan and limiting wear of the plant.…”

“…[10], [31], [43] Employment Construction of PTES may create local job opportunities. [43] Sustainability trademark Use of energy storages could help power companies increase their sustainability and "green label" trademark.…”

“…As frequently discussed in literature, one of the major deciding factors is the substantial capital cost (Table 3) related to soil excavation and pit construction [23]. Sifnaios et al [31] investigated specific investment costs for eight operational PTES in Denmark. The study shows a strong correlation between storage size and specific investment cost.…”