US 11,656,008 B2
Heat pump utilising the shape memory effect
Michael Langan, Glasnevin (IE); and Kevin O'Toole, Glasnevin (IE)
Assigned to EXERGYN LTD., Glasnevin (IE)
Appl. No. 16/966,296
Filed by EXERGYN LTD., Glasnevin (IE)
PCT Filed Jan. 30, 2019, PCT No. PCT/EP2019/052300
§ 371(c)(1), (2) Date Jul. 30, 2020,
PCT Pub. No. WO2019/149783, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 1801534 (GB), filed on Jan. 30, 2018.
Prior Publication US 2020/0370796 A1, Nov. 26, 2020
Int. Cl. F25B 30/04 (2006.01); F25B 29/00 (2006.01); F25B 37/00 (2006.01); F03G 7/06 (2006.01)
CPC F25B 30/04 (2013.01) [F03G 7/065 (2013.01); F25B 29/006 (2013.01); F25B 37/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A heat pump system comprising
a Shape-Memory Alloy (SMA) or Negative Thermal Expansion (NTE) core positioned in a housing, and adapted to absorb heat and store energy in response to a first fluid inputted at a first temperature, wherein the SMA or NTE core comprises a plurality of elements to define the core;
the housing is configured to receive the same fluid or a second fluid via an inlet wherein a device changes stress on the SMA or NTE core in the housing to cause the SMA or NTE core to change state to release the heat absorbed into the fluid;
an outlet adapted to output the fluid either at a higher temperature or lower temperature relative to the first or second fluid temperature depending on whether heat has been released or absorbed by the SMA or NTE core;
a high-pressure accumulator adapted to provide a stress to the core to enable a forward or a reverse phase change to occur in the core; and
a low-pressure accumulator configured to reduce stress on the SMA or NTE core in the housing when the fluid is being inputted at an initial temperature; and
wherein a pump is utilised to pump a hydraulic fluid from the low-pressure accumulator to the high-pressure accumulator.