| CPC F03B 13/06 (2013.01) [F03B 17/005 (2013.01); F05B 2220/30 (2013.01); F05B 2260/422 (2020.08)] | 19 Claims |
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1. A pumped hydro storage system comprising:
a first reservoir;
a second reservoir;
a cavity tank, the cavity tank is disposed at a cavity tank elevation which is below a second reservoir elevation of the second reservoir;
a turbine unit, the turbine unit includes a first turbine unit flow port and a second turbine unit flow port;
a penstock which is in fluid communication with the first and the second reservoirs via the turbine unit, wherein the penstock comprises
a first penstock portion in fluid communication with the first reservoir and the cavity tank,
a second penstock portion in fluid communication with the second reservoir and the cavity tank via the turbine unit,
the first turbine flow port is in communication with the first reservoir, and
the second turbine flow port is in communication with the second reservoir;
a slurry circulating through the system, wherein the slurry comprises
a first fluid which is high-density fluid, wherein the high-density fluid has a density greater than water, and
a second fluid which is a low density fluid having a density lower than the first fluid, wherein the first and second fluid forms a binary slurry;
wherein the slurry flows through the turbine unit in a first direction from the first reservoir to the second reservoir to cause the turbine unit to generate energy and the slurry flows through the turbine unit in a second direction from the second reservoir to the first reservoir to recharge the system; and
wherein the high-density fluid increases power output of the system as compared to water.
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