| 1. | Top view of two rotating displacer powering the horizontal piston.
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| 2. | The engine's displacer also has very low losses.
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| 3. | The displacer is a stainless steel can, 27 cm in diameter.
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| 4. | The hot displacer is larger than the cold displacer.
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| 5. | The hot displacer is larger than the cold displacer.
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| 6. | The heart of the system is the displacer units, which are pressurised spheres containing nitrogen gas.
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| 7. | It is also warm to the touch because it was made with a displacer's skin.
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| 8. | The displacer moves up and down to control the heating and cooling of the gas in the engine.
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| 9. | The G-M regenerator cycle in a cryocooler operates using a piston type displacer and heat exchanger.
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| 10. | No work is required to move the displacer since, ideally there is no pressure drop over it.
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