Energy system and method for pressure adjustment in an energy system

A method of adapting the line pressure in a connecting line device of an energy system, in particular of a house energy system, wherein the energy system comprises a first energy source device, which is connected to a second energy source device via the connecting line device, and wherein the energy system comprises a first energy sink device, which is connected via the connecting line device to the second energy source device, characterized by the following steps:

• a) in a first mode of operation of the energy system, an energy provided by the first energy source device is transported at a first pressure via the connecting line device to the second energy source device and is stored there, wherein at least individual sections of the connecting line device are configured as bidirectional line sections, via which a flow takes place in both directions during operation of the energy system;
• b) in at least one second mode of operation of the energy system, energy provided by the second energy source device is supplied with a second pressure, which is different from the first pressure, via the bidirectional line sections of the connecting line device to the first energy sink device;
• c) depending on the mode of operation of the energy system, a direction-dependent pressure level in the bidirectional line sections of the connecting line device is set by means of a pressure adaptation device, which is connected to the connecting line device.