US 12,007,124 B2
Distribution pump arrangement for a hydraulic distribution system having changing flowing direction
Per Rosén, Lund (SE); Jacob Skogström, Lomma (SE); Fredrik Rosenqvist, Helsingborg (SE); and Bengt Lindoff, Bjarred (SE)
Assigned to E.ON SVERIGE AB, Malmo (SE)
Appl. No. 17/309,589
Filed by E.ON SVERIGE AB, Malmo (SE)
PCT Filed Dec. 9, 2019, PCT No. PCT/EP2019/084188
§ 371(c)(1), (2) Date Jun. 8, 2021,
PCT Pub. No. WO2020/120385, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 18211861 (EP), filed on Dec. 12, 2018.
Prior Publication US 2022/0026080 A1, Jan. 27, 2022
Prior Publication US 2023/0045781 A9, Feb. 9, 2023
Int. Cl. F24D 19/10 (2006.01); F24D 3/02 (2006.01); G05D 16/20 (2006.01)
CPC F24D 19/1006 (2013.01) [F24D 3/02 (2013.01); G05D 16/2073 (2013.01); G05D 16/208 (2013.01); F24D 2220/02 (2013.01); F24D 2220/046 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A distribution pump arrangement for a bi-directional hydraulic distribution grid configured to distribute thermal energy, the bi-directional hydraulic distribution grid comprising a hot conduit configured to bi-directionally allow heat transfer liquid of a first temperature to flow therethrough and a cold conduit configured to bi-directionally allow heat transfer liquid of a second temperature to flow therethrough, wherein the second temperature is lower than the first temperature, the distribution pump arrangement comprising:
a hot conduit control valve in the hot conduit;
a first distribution pump having an inlet connected to the hot conduit at a first side of the hot conduit control valve, and an outlet connected to the hot conduit at a second side, opposite the first side, of the hot conduit control valve;
a pressure difference determining device arranged beyond the second side of the hot conduit control valve and configured to determine a local pressure difference, Δp, between a local pressure, phot, of heat transfer liquid in the hot conduit and a local pressure, pcold, of heat transfer liquid in the cold conduit, wherein Δp=|pcold−phot|; and
a controller configured to:
while Δp<a threshold value, set the distribution pump arrangement in a flowing mode, wherein:
the first distribution pump is set to be inactive, and
the hot conduit control valve is set to be open, thereby allowing a flow of heat transfer liquid of the hot conduit through the hot conduit control valve; and
while Δp≥the threshold value and pcold>phot, set the distribution pump arrangement in a hot conduit pumping mode, wherein:
the hot conduit control valve is set to be closed, thereby stopping a flow of heat transfer liquid of the hot conduit through the hot conduit control valve, and
the first distribution pump is set to be active, thereby reducing the local pressure difference.