Fig. 9

Specific capital costs, capacity and payback times of different ATES systems in operation. ^aBridger and Allen (2010),^bPaksoy et al. (2009), ^cAndersson and Sellberg (1992), ^dVanhoudt et al. (2011), ^eEggen and Vangsnes (2005), ^fWigstrand (2009), ^gBaxter et al. (2018), ^hWorthington (2011), ⁱDincer and Rosen (2011), ^jHoes et al. (2006), ^kBakema et al. (1994), ^lSanner (2000)