“…On the other hand the challenge is on their global cost, due to the (still) high price of some components and to the possibility of showing a lower efficiency. Both heat for space heating and cooling capacity in favour of air conditioning can be provided by such a system (Cortella et al, 2018), which can be eventually coupled with a heat storage (Polzot et al, 2016b(Polzot et al, , 2016c.…”