## 3 Thermochemical Heat Storage: Description of Materials and Processes
### Thermochemical Heat Storage Systems
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Project Name/Institution** & & **Description** & **Storage System** \\ \hline \multirow{4}{*}{MONOSORP [305] (2006)} & \(\bullet\) & Storage system for space heating & \\  & \(\bullet\) & Charging temperature T\({}_{\rm c}\) = 20 \({}^{\circ}\)C & \multirow{2}{*}{Zeolite 4A} \\  & \(\bullet\) & Discharging temperature T\({}_{\rm d}\) = 180 \({}^{\circ}\)C & \\  & \(\circ\) & Storage system for space heating. & \\  & \(\circ\) & T\({}_{\rm c}\) = 20 \({}^{\circ}\)C & \multirow{2}{*}{Zeolite 13X} \\ Technology SPF [241] (2006) & \(\circ\) & T\({}_{\rm d}\) = 180 \({}^{\circ}\)C & \\  & \(\bullet\) & Lab scale packed bed reactor for seasonal & \\  & \(\bullet\) & storage of solar heat & \\  & \(\bullet\) & Discharge time about 25 h & \\  & \(\bullet\) & Storage energy density measured 0.14 MJ/kg & \\  & \(\circ\) & System integrated with a water tank (STES) for & \\  & \(\circ\) & heating purposes & LiCl with Zeolite 13X \\ CWS 2 [306] (2011) & \(\circ\) & T\({}_{\rm c}\) = 35 \({}^{\circ}\)C & \\  & \(\circ\) & T\({}_{\rm d}\) = 180 \({}^{\circ}\)C & \\  & \(\bullet\) & Lab scale packed bed reactor for heating & \\  & \(\circ\) & purposes (Heat Power 150 W) & \\  & \(\bullet\) & T\({}_{\rm c}\) = 10 \({}^{\circ}\)C & \\  & \(\bullet\) & T\({}_{\rm d}\) = 50 \({}^{\circ}\)C & \\  & \(\circ\) & Lab scale two packed bed modules for & \\ Energy hub-ECN [178; 179] & \(\circ\) & heating purposes & \\ (2013-2014) & \(\circ\) & T\({}_{\rm c}\) = 70 \({}^{\circ}\)C & \\  & \(\circ\) & T\({}_{\rm d}\) = 185 \({}^{\circ}\)C & \\  & \(\circ\) & Heat Power 400 W & \\  & \(\bullet\) & Storage system for space heating and domestic & \\ ASIC 3 [176] (2014) & \(\bullet\) & hot water & Zeolite 4A (Zeolite 13X) \\  & \(\bullet\) & T\({}_{\rm c}\) = 25 \({}^{\circ}\)C & \\  & \(\bullet\) & T\({}_{\rm d}\) = 180 (230) \({}^{\circ}\)C & \\  & \(\circ\) & Storage system integrated in a domestic & \\  & \(\circ\) & ventilation system for space heating during & \\ STAID 4 [180] (2015) & \(\circ\) & peak hours & \\  & \(\circ\) & T\({}_{\rm c}\) = 57 \({}^{\circ}\)C & \\  & \(\circ\) & T\({}_{\rm d}\) = 120–180 \({}^{\circ}\)C & \\  & \(\circ\) & Storage energy density 0.41 GJ/m3 & \\  & \(\bullet\) & Packed bed reactor for house heating & \\  & \(\bullet\) & T\({}_{\rm c}\) = 25 \({}^{\circ}\)C & \\  & \(\bullet\) & T\({}_{\rm d}\) = 80 \({}^{\circ}\)C & \\ ESSI 5 [276] (2016) & \(\bullet\) & Thermal power measured during sorption & SrBr\({}_{2}\) -6H\({}_{2}\)O \\  & \(\circ\) & mode 0.3–0.8 kW & \\  & \(\bullet\) & Thermal power measured during desorption & \\  & \(\circ\) & mode 0.4–1.6 kW & \\  & \(\circ\) & Storage system for space heating & \\ STAID [181] (2016) & \(\circ\) & T\({}_{\rm c}\) = 20 \({}^{\circ}\)C & \\  & \(\circ\) & T\({}_{\rm d}\) = 120–180 \({}^{\circ}\)C & \\  & \(\bullet\) & Lab-scale prototype experimentally investigated & \\  & \(\circ\) & to store low-temperature heat for space heating & \\ NSFC 6 [159] (2017–2018) & \(\bullet\) & T\({}_{\rm c}\) = 20 \({}^{\circ}\)C & \\  & \(\bullet\) & T\({}_{\rm d}\) = 30 \({}^{\circ}\)C & \\  & \(\bullet\) & Thermal power (56.7–136) W & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Example of prototypes of open systems for thermochemical storage.