Three-conductor and four-conductor system for saving energy in connection with district heat

A district-heat network having a district-heat afflux and a district-heat reflux, comprising:

• at least one heat-consumer which is supplied with heat from the district-heat afflux;
• an afflux supply port via which the district-heat consumer plant is linked to the district-heat afflux of the district-heat network;
• an afflux transfer station comprising an afflux heat exchanger in flow communication with the afflux supply port, in order to withdraw heat from the district-heat afflux for the purpose of supplying the at least one heat-consumer;
• and
• a reflux return port in flow communication with the afflux heat exchanger via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network;
• and
• at least one heat-consumer which is supplied with heat only from the district-heat reflux;
• a reflux supply port via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network;
• a reflux transfer station comprising a reflux heat exchanger in flow communication with the reflux supply port, in order to withdraw heat from the district-heat reflux for the purpose of supplying the at least one heat-consumer;
• and
• a reflux return port in flow communication with the reflux heat exchanger via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network.

A district-heat consumer plant, which is linked to a district-heat network having a district-heat reflux, comprising:

• at least one heat-consumer which is supplied with heat only from the district-heat reflux;
• a reflux supply port via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network;
• a reflux transfer station comprising a heat exchanger in flow communication with the reflux supply port, in order to withdraw heat from the district-heat reflux for the purpose of supplying the at least one heat-consumer;
• and
• a reflux return port in flow communication with the heat exchanger via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network.

A district-heat network having a district-heat afflux and a district-heat reflux, comprising:

• at least one heat-consumer which a low-energy consumer system or a low-temperature system is supplied with heat from the district-heat afflux;
• an afflux supply port via which the district-heat consumer plant is linked to the district-heat afflux of the district-heat network;
• an afflux transfer station comprising an afflux heat exchanger in flow communication with the afflux supply port, in order to withdraw heat from the district-heat afflux for the purpose of supplying the at least one heat-consumer;
• and
• a reflux return port in flow communication with the afflux heat exchanger via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network;
• and
• at least one heat-consumer which is a low-energy consumer system or a low-temperature system supplied with heat only from the district-heat reflux;
• a reflux supply port via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network;
• a reflux transfer station comprising a reflux heat exchanger in flow communication with the reflux supply port, in order to withdraw heat from the district-heat reflux for the purpose of supplying the at least one heat-consumer;
• and
• a reflux return port in flow communication with the reflux heat exchanger via which the district-heat consumer plant is linked to the district-heat reflux of the district-heat network.