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1. (WO2017001562) SMA BUNDLE WIRE OPTIMISATION IN AN ENERGY RECOVERY DEVICE
Anmerkung: Text basiert auf automatischer optischer Zeichenerkennung (OCR). Verwenden Sie bitte aus rechtlichen Gründen die PDF-Version.

Claims

1 . An energy recovery device comprising a plurality of Shape-Memory Alloy (SMAs) or Negative Thermal Expansion (NTE) elements arranged as a plurality of wires positioned substantially parallel with each other to define a core wherein the wires are selected to have different dimensions and the plurality of wires are activated at substantially the same time in response to a temperature change.

2. The energy recovery device as claimed in claim 1 wherein wires positioned towards the centre of the core have a smaller diameter than wires positioned near the outside of the core

3. The energy recovery device as claimed in claim 2 wherein the wire diameters are selected to match the characteristics of a fluid flow at any point in the core and take account of the impact of the flow with other wires and the loss in energy of the flow as it penetrates the bundle, and an even activation time can be achieved for the plurality of wires.

4. The energy recovery device as claimed in any preceding claim wherein at least one of the wires is tapered at one end.

5. The energy recovery device as claimed in any preceding claim wherein activation of at least one wire comprises a transformation from a martensite to an austenite state.

6. A core for use in an energy recovery device, said core comprising a plurality of wires positioned substantially parallel with each other and wherein the wires are selected to have different dimensions and the plurality of wires are activated at substantially the same time in response to a temperature change.

7. A method of making an energy recovery device comprising a plurality of Shape-Memory Alloy (SMAs) or Negative Thermal Expansion (NTE)

elements arranged as a plurality of wires positioned substantially parallel with each other to define a core comprising the step of selecting a plurality of wires with different dimensions and positioning the plurality of wires so that they are activated at substantially the same ti me in response to a temperature change.