Rolls-Royce North American Technologies Inc.

Rolls-Royce Corporation

Michael Head

Douglas J Snyder

Eugene Charles Jansen

Timothy Unton

Eric Sean Donovan

Tim Unton

Brian Thomas Spangler

Aric Acius

Ken S Rubel

Ken Rubel

A heat transfer system for high transient heat loads includes a fluid, a heat exchanger; a compressor downstream of the heat exchanger outlet; a condenser downstream of the compressor outlet, and a thermal energy storage (TES) section downstream of the condenser outlet and upstream of the heat exchanger. The TES section may include a first pressure regulating valve downstream of a TES unit; and a second pressure regulating valve upstream of the first pressure regulating valve.

Method for reducing condenser size and power on a heat rejection system

A two-phase pump loop (TPPL) for dissipating a thermal load during operation of an apparatus includes a coolant, a vapor/liquid receiver, a pump, an evaporator, a condenser, a valve (V) configured to regulate a pressure at an outlet of the condenser; a valve (V) having a control set point set equivalent to a low pressure (P) measured in the vapor/liquid receiver; and a controller configured to control the set points of Vand V. The TPPL is configured to cool the thermal load with tight control of the temperature of the coolant that is cooling the apparatus. The TPPL may be combined with a vapor cycle system (VCS) to provide a thermal management system with the VCS being configured to use the same or different coolant than the TPPL.

Tight temperature control at a thermal load with a two phase pumped loop, optionally augmented with a vapor compression cycle

A thermal management system for regulating dissipation of multiple thermal loads during operation of an apparatus includes a two-phase pump loop (TPPL), a vapor cycle system (VCS), and a liquid thermal energy storage (TES) system integrated together to maintain the apparatus at a constant temperature. The TPPL is configured to remove heat from the apparatus; the TES system is configured to provide thermal energy storage and temperature regulation; and the VCS is configured to transfer heat to the environment. The multiple thermal loads include a primary thermal load in the form of heat from the apparatus and a secondary thermal load in the form of at least one of a housekeeping thermal load or a power electronics thermal load. The primary and secondary loads are at different temperatures with each being independently selected to be transient or steady state.

Thermal management system including two-phased pump loop and thermal energy storage

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Mooresville, IN, United States of America

Michael Head