Method for operating a cyclical thermal adsorption heating or refrigeration system, and device

Method for operating a cyclically working thermal adsorption heat or refrigeration system including a desorption phase and an adsorption phase, comprising at least one adsorber/desorber unit (A/D), a refrigerant cyclically adsorbed during the adsorption phase and desorbed during the desorption phase, an evaporator/condenser unit (V/K) acting as an evaporator or as a condenser depending on the process phase, comprising a cyclic heat recovery taking place at the same time in a heat recovery circuit having a temporary storage (ZS) and a heat transfer medium, comprising the following method steps:

• At the end of the desorption phase:
• bringing the heat transfer medium having a low temperature (Tu) from the temporary storage (ZS) into a thermal contact with the evaporator/condenser unit (V/K),
• displacing the heated (T0) heat transfer medium into the temporary storage (ZS) in a first temporary storage phase,
• At the end of the adsorption phase:
• bringing the heated heat transfer medium from the temporary storage into a thermal contact with the evaporator/condenser unit (V/K),
• displacing cold (Tu) heat transfer medium into the temporary storage (ZS) in a second temporary storage phase, wherein
• the cyclic heat recovery is coupled to a process for increasing the loading width of the adsorber/desorber unit (A/D) by a thermal reduction of the desorption pressure (pdes) and/or increase of the adsorption pressure (pads),
• characterized in that
• the evaporator/condenser unit (V/K) is brought into at least one of a low-temperature contact (NT) below the condensation temperature during the first temporary storage phase so as to influence the desorption pressure (pdes) and a medium-temperature contact (MT) above the evaporation temperature during the second temporary storage phase so as to influence the adsorption pressure (pads), wherein the coupling of the evaporator/condenser unit (V/K) to the low-temperature contact (NT) and the coupling of the evaporator/condenser unit (V/K) to the medium-temperature contact (MT) takes place, in each case, before the start of the first or second temporary storage phase
• and further characterized in that
• the cyclic heat recovery and the process for increasing the loading width are realized in a valve-controlled manner, wherein the switching times for the valve control are determined depending on a first process temperature (T1) measured at the outlet of the evaporator/condenser unit (V/K), a second process temperature (T2) measured at the outlet of the temporary storage (ZS) and/or a temperature difference (T1−T2) determined between the first and the second process temperatures.