Patent ID: 11959669
Assignee: ROLLS-ROYCE NORTH AMERICAN TECHNOLOGIES, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 18:
19. A cooling system comprising:
a two-phase pumped loop (TPPL), the two-phase pumped loop including
a receiver,
a pump downstream from the receiver,
a heat load downstream from the pump,
a TPPL tee downstream from the heat load, the TPPL tee comprising a T-shaped separator to separate a liquid portion of a cooling fluid from a vapor portion of the cooling fluid through gravity,
a TPPL check valve downstream from the TPPL tee, and
a heat exchanger downstream from the TPPL check valve and upstream from the receiver; and

a vapor cycle system (VCS) loop, the vapor cycle system loop including
the receiver,
a compressor downstream from a vapor outlet of the receiver,
a compressor check valve downstream from the compressor and upstream of the heat exchanger, and
the heat exchanger,

wherein the heat load, which is in the TPPL, is in the VCS loop downstream from a liquid outlet of the receiver,
wherein the two-phase pumped loop is configured to operate in a TPPL mode in which the cooling fluid flows through the two-phase pumped loop due to the TPPL check valve being open and the compressor check valve being closed, and wherein the vapor cycle system loop is configured to operate in a VCS mode in which the cooling fluid flows through the vapor cycle system loop due to the TPPL check valve being closed and the compressor check valve being open,
wherein the TPPL check valve is configured to close if, in response to the compressor being turned on, a pressure at an outlet of the compressor is higher than a pressure of the two-phase pumped loop upstream of the TPPL check valve,
wherein the compressor check valve is configured to close if, in response to the compressor being turned off, a pressure at an inlet of the heat exchanger is higher than a pressure at an outlet of the compressor.