An Isopropanol-Acetone-Hydrogen (IAH) heat pump employing metal hydride for storing hydrogen to realize energy storage is investigated in the present work. The influences of some operation parameters on the performance of storage type heat pump are presented, the performance of storage type heat pump worsens with the increase of reflux ratio, endothermic reaction temperature and exothermic reaction temperature, while there exists an optimal molar ratio of hydrogen to acetone in which the storage type heat pump has the best performance. Multi-parameter optimization is employed to search the optimal design scheme, and the performance of heat pump can be improved greatly after optimization. (C) 2014 Published by Elsevier Ltd.