Energy distributing system

An energy distributing system comprising:

• a district heating grid having a district feed conduit for an incoming flow of district heat transfer fluid having a first temperature in the range of 50-120° C., and a district return conduit for a return flow of district heat transfer fluid;
• and
• a local energy distributing system comprising:
• a local feed conduit;
• a local return conduit,
• wherein the local feed conduit and the local return conduit are along a majority of their extension disposed in ground and each of the local feed conduit and the local return conduit are surrounded by and in direct contact with the ground along the majority of their extension;
• a central heat exchanger connected to the district heating grid, wherein the central heat exchanger is configured to exchange heat from the incoming flow of district heat transfer fluid to an outgoing flow of local heat transfer fluid in the local feed conduit, the outgoing flow of local heat transfer fluid having a temperature of 5-30° C.;
• and
• 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,
• wherein the local feed conduit together with the local return conduit have a thermal conductivity between them of greater than 2.5 W/(mK) as configured parallel arranged in the ground whereby the local feed conduit, the local return conduit, and the local heat transfer fluid flowing therein absorb thermal energy from the ground surrounding the local feed conduit and the local return conduit such that the local energy distributing system absorbs a portion of the total energy being put into the local energy distributing system from solar energy in the form of thermal energy absorbed from the ground surrounding the local feed conduit and the local return conduit.

A method for distributing energy to a plurality of buildings, the method comprising:

• exchanging, at a central heat exchanger, heat from an incoming flow of district heat transfer fluid of a district feed conduit in a district heating grid, the incoming flow of district heat transfer fluid having a first temperature in the range of 50-120° C., to an outgoing flow of local heat transfer fluid in a local feed conduit of a local energy distributing system, the outgoing flow of local heat transfer fluid having a temperature of 5-30° C.;
• and
• extracting, at a local heating system in each of the plurality of buildings, each local heating system having an inlet connected to the local feed conduit, heat from the local heat transfer fluid flowing in the local feed conduit for providing hot tap water and/or comfort heating to the respective building,
• wherein the local feed conduit together with a local return conduit have a majority of their extension disposed in and in direct contact with ground and have a thermal conductivity greater than 2.5 W/(mK) between them as configured parallel arranged in the ground whereby the local feed conduit, the local return conduit, and the local heat transfer fluid flowing therein absorb thermal energy from the ground surrounding the local feed conduit and the local return conduit such that the local energy distributing system absorbs a portion of the total energy being put into the local energy distributing system from solar energy in the form of thermal energy absorbed from the ground surrounding the local feed conduit and the local return conduit.