The silica gel-water adsorption chiller and the LiBr-H2O absorption chiller can be driven by hot water. The dynamical characteristics of hot water of the adsorption chiller and the absorption chiller are shown in Fig. 6 and Fig. 7, respectively. Fig. 6 shows that: (1) The hot water outlet temperature drops sharply when the cold adsorption bed begin to be heated. Then the hot water outlet temperature rises slowly, and drops again during the process of mass-heat recovery. (2) The mass recovery duration has influence on the cycle characteristics. The hot adsorption bed can re-desorb more water vapour because of the sharp drop of pressure during the process of mass recovery. More heat is needed for re-desorption, so the hot water outlet temperature will decrease. Mass recovery time has important impact on system performance. After the 90s of mass recovery, if the hot water outlet temperature still decline, it means that 90s is short for re-desorption. After the 180s of mass recovery, the hot water outlet temperature becomes constant, it means that the re-desorption is processed completely. (3) The silica gel-water adsorption chiller can be powered by very low temperature hot water. Fig. 7 shows that: (1) The hot water inlet and outlet temperature of the absorption cooling system is more stable than that of adsorption chiller system; (2) The absorption chiller can be powered by relatively higher temperature hot water. Usually, the hot water temperature should be higher than 80 °C.