An adsorption heat pump (AHP) is proposed to expand the available heat sources and to increase cooling power. The main objective of this research is to carry out the conceptual study of operation range in points of adsorption equilibria and experimental study of desorption and adsorption processes by silica gel-waterAHP which is composed of a mechanical booster pump (MBP) and an adsorber of packed bed. This effect is confirmed experimentally. In these experimental ranges, the amount of pump power is effective to increase cooling power. Therefore, it is confirmed that the range of temperature, which is able to use as a heat source, is expanded and cooling power is increased directly by pump power.