US 11,988,395 B2
Thermal energy extraction assembly
Per Rosén, Lund (SE); Jacob Skogström, Lomma (SE); Helen Carlström, Bjärred (SE); and Bengt Lindoff, Bjärred (SE)
Assigned to E.ON SVERIGE AB, Malmo (SE)
Filed by E.ON SVERIGE AB, Malmo (SE)
Filed on Jun. 28, 2021, as Appl. No. 17/304,895.
Claims priority of application No. 20183734 (EP), filed on Jul. 2, 2020.
Prior Publication US 2022/0003427 A1, Jan. 6, 2022
Int. Cl. F24D 10/00 (2022.01); F24D 3/18 (2006.01); F24D 11/02 (2006.01)
CPC F24D 10/003 (2013.01) [F24D 3/18 (2013.01); F24D 11/0207 (2013.01); F24D 2200/12 (2013.01); F24D 2200/123 (2013.01); F24D 2200/13 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A thermal energy extraction assembly comprising:
a first heat exchanger comprising a primary side and a secondary side, the primary side being connectable to a thermal energy distribution grid, the secondary side being connected to a heating circuit, the heating circuit comprising a feed conduit configured to conduct heating circuit heat transfer fluid from an outlet of the secondary side of the first heat exchanger to a heat emitter and a return conduit configured to conduct heating circuit heat transfer fluid from the heat emitter to an inlet of the secondary side of the first heat exchanger, the first heat exchanger being configured to exchange heat from the secondary side to the primary side;
a second heat exchanger comprising a primary side and a secondary side, the primary side being connectable to the thermal energy distribution grid, the secondary side being connected to a cooling circuit, the cooling circuit comprising a feed conduit configured to conduct cooling circuit heat transfer fluid from an outlet of the secondary side of the second heat exchanger to a cooler and a return conduit configured to conduct cooling circuit heat transfer fluid from the cooler to an inlet of the secondary side of the second heat exchanger, the second heat exchanger being configured to exchange heat from the primary side to the secondary side;
a plurality of heat pumps each having a condenser side comprising an inlet and an outlet, both the inlet and the outlet of the condenser side being directly connected to the feed conduit of the heating circuit, and an evaporator side comprising an inlet and an outlet, both the inlet and the outlet of the evaporator side being directly connected to the feed conduit of the cooling circuit, wherein each heat pump being configured to pump heat from cooling circuit heat transfer fluid of the cooling circuit to heating circuit heat transfer fluid of the heating circuits;
a connection circuit comprising a heating circuit by-pass conduit configured to selectively direct a by-pass feed of the heating circuit heat transfer fluid from the feed conduit of the heating circuit to the return conduit of the heating circuit and a cooling circuit by-pass conduit configured to selectively direct a by-pass feed of the cooling circuit heat transfer fluid from the feed conduit of the cooling circuit to the return conduit of the cooling circuit; and
a valve assembly comprising a heating circuit by-pass control valve configured to partly or fully by-pass the heat emitter and a cooling circuit by-pass control valve configured to partly or fully by-pass the cooler, wherein at least the operation of the heating circuit by-pass control valve and the cooling circuit by-pass control valve enable operation of the thermal energy extraction assembly in a dual mode wherein both the heat emitter and the cooler operate simultaneously.