ABSTRACT
The pressure-driven (PD) adsorptive heat transformation (AHT) cycles are much less common than the temperature-driven (TD) cycles and suggested mainly for the temperature upgrading mode. This chapter considers the basics of PD cycles and the first realization of the “Heat from Cold” (HeCol) cycle by using “salt/matrix” composites. The general methodology applied here to analyze which adsorbent is optimal for the PD AHT cycles is similar to that already applied for the TD AHT cycles, because it is based on the fundamental principles of adsorption dynamics. A new PD AHT cycle has been suggested for increasing the temperature potential of ambient heat to the level sufficient for heating dwellings. Thus, the HeCol cycle uses the temperature difference between two natural thermostats, both being at low temperature. The non-isothermal HeCol cycle allows a higher heating temperature to be obtained.
