A combined cooling and heating system including a district cooling grid having a feed conduit for an incoming flow of cooling fluid having a first temperature, and a return conduit for a return flow of cooling fluid having a second temperature, the second temperature being higher than the first temperature; a local cooling system being configured to absorb heat from a first building and comprising a heat exchanger having a heat exchanger inlet and a heat exchanger outlet; and a local heating system being configured to heat the first or a second building and comprising a heat pump having a heat pump inlet and a heat pump outlet. The heat exchanger inlet is connected to the feed conduit of the district cooling grid; and the heat pump inlet is connected to the return conduit of the district cooling grid and to the heat exchanger outlet.

The present invention relates to a method for controlling one or more heat pumps (110) connected to a distribution grid (10) for fluid-based distribution of heating and cooling in order to, at least partly, compensate for a cold outtake from the distribution grid (10) by a first cooling machine (120) connected to the distribution grid (10). Alternatively, or in combination, one or more cooling machines (120) connected to the distribution grid (10) may be controlled in order to, at least partly, compensate for a heat outtake from the distribution grid (10) by a first heat pump (120) connected to the distribution grid (10). The controlling is made a control server (200) monitoring outtake of heat and/or cold from the distribution grid (10) by the heat pumps (110) and cooling machines (120) connected to the distribution grid (10). The control server (120) generates and sends out control messages to the heat pumps and/or cooling machines.

A heat extracting system (100) arranged to be connected to a thermal energy circuit (300) comprising a hot conduit (302) configured to allow thermal fluid of a first temperature to flow therethrough, and a cold conduit (304) configured to allow thermal fluid of a second temperature to flow therethrough, the second temperature is lower than the first temperature, and a heat depositing system (200) arranged to be connected to a thermal energy circuit (300) comprising a hot conduit (302) configured to allow thermal fluid of a first temperature to flow therethrough, and a cold conduit (304) configured to allow thermal fluid of a second temperature to flow therethrough, the second temperature is lower than the first temperature. Also a heat depositing system (200) is disclosed.

Auxiliary system for a low-temperature remote thermal energy distribution network (anergy network) connected to user thermal installations, comprising one or more heat pumps thermally coupled to the anergy network via a heat exchanger, one or more air-liquid heat exchangers thermally coupled to the outside air, and a hydraulic network interconnecting the heat pumps to the heat exchanger of the anergy network, at least one of the heat pumps being a liquid-air heat pump fluidically connected by the hydraulic network to at least one of said air-liquid heat exchangers. The auxiliary system further comprises a measurement, control and regulation (MCR) system. The hydraulic network comprises valves controlled by the MCR system and a hydraulic circuit configured to allow direct connection of said air-liquid heat exchangers to the heat exchanger of the anergy network.

A district energy distributing system comprising a geothermal power plant comprising a first and a second circuit. The first circuit comprises a feed conduit for an incoming flow of geothermally heated water from a geothermal heat source; a boiler comprising a heat exchanger configured to exchange heat from the incoming flow of geothermally heated water to superheat a working medium of a second circuit of the geothermal power plant; and a return conduit for a return flow of cooled water from the boiler to the geothermal heat source. The second circuit comprises the boiler configured to superheat the working medium of the second circuit; an expander configured to allow the superheated working medium to expand and to transform the expansion to mechanical work; and a condenser configured to transform the expanded working medium to liquid phase and to heat a heat transfer fluid of a district thermal energy circuit.

A district energy distributing system is disclosed. The system comprises a geothermal heat source system comprising a geothermal heat source and a feed conduit for a flow of geothermally heated water from the geothermal heat source. The system further comprises a district feed conduit, a district return conduit and a plurality of local heating systems, each having an inlet connected to the district feed conduit and an outlet connected to the district return conduit, wherein each local heating system is configured to provide hot water and/or comfort heating to a building, A central heat exchanger is connected to the feed conduit of the geothermal heat source system such that an incoming flow of geothermally heated water is provided to the central heat exchanger.

Various embodiments of the teachings herein include a control platform for controlling a heat network. A plurality of heat consumers and/or heat generators are coupled to the heat network for heat exchange. The control platform is programmed to: receive from each heat consumer information about a respective local feed temperature required as a minimum by the heat consumer within a time interval; and/or receive from each heat generator information about a respective local feed temperature that can be provided as a maximum by the heat generator within the time interval; and control the heat network depending on the received information relating to the local feed temperatures.

A central controller for controlling power consumption in a thermal energy system is disclosed, the energy system may include a plurality of heat pump assemblies and a plurality of cooling machine assemblies, each heat pump assembly being connected to a thermal energy circuit comprising a hot conduit and a cold conduit via a thermal heating circuit inlet connected to the hot conduit and via a thermal heating circuit outlet connected to the cold conduit, each cooling machine assembly being connected to the thermal energy circuit via a thermal cooling circuit inlet connected to the cold conduit and via a thermal cooling circuit outlet connected to the hot conduit.

A local energy distributing system includes a local feed conduit; a local return conduit; a central heat exchanger connected to a heating grid having a feed conduit for an incoming flow of heat transfer fluid having a first temperature in the range of 50-120° C., and a return conduit for a return flow of heat transfer fluid having a second temperature, the second temperature being lower than the first temperature, wherein the central heat exchanger is configured to exchange heat from the incoming flow of heat transfer fluid to an outgoing flow of local heat transfer fluid in the local feed conduit. The system also includes a plurality of local heating systems, each having an inlet connected to the local feed conduit and an outlet connected to the local return conduit, wherein each local heating system is configured to provide hot water and/or comfort heating to a building.

The disclosure relates to a method for controlling a heat distribution system. The method comprises: determining a time period of forecasted elevated overall outtake of heat from a district thermal energy distribution grid (110) by local heat distribution systems (150) connected to the district thermal energy distribution grid (110); determining, at a control sewer (130), a control signal associated with a respective one of a plurality of local control units (140), wherein each respective control signal is time resolved and comprises information pertaining to a temporary increase in heat outtake from the district thermal energy distribution grid (110) before the determined time period, and information pertaining to a temporary decrease in heat outtake from the district thermal energy distribution grid (110) during the determined time period; sending each respective control signal from the control sewer (130) to the respective local control unit (140); receiving the respective control signal at the respective local control unit (140); and regulating, at each respective local control unit (140) and based on the respective control signal, the outtake of heat by the respective local heat distribution system (150) from the district thermal energy distribution grid (110).