Free-piston reciprocating cryogenic expander utilizing phase controller
| Autor: | Jiho Park, Sangkwon Jeong, Kyungjoong Kim, Jeongmin Cha |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Computer science
020209 energy Controller (computing) Phase (waves) Mechanical engineering Solenoid 02 engineering and technology law.invention Reciprocating motion Piston 020401 chemical engineering Volume (thermodynamics) law 0202 electrical engineering electronic engineering information engineering Reservoir pressure 0204 chemical engineering Pulse tube refrigerator |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 171:012079 |
| ISSN: | 1757-899X 1757-8981 |
| Popis: | In a free-piston expander which eliminates mechanical linkages, a prescribed behaviour of the free-piston movement is the key to an expander performance. In this paper, we have proposed an idea of reducing complexity of the free-piston expander. It is to replace both multiple solenoid valves and reservoirs that are indispensable in a previous machine with a combination of a single orifice-reservoir assembly. It functions as a phase controller like that of a pulse tube refrigerator so that it generates time-delay of pressure variation between the warm-end and the reservoir resulting in the intended expansion of the cold-end volume down to the pre-set reservoir pressure. The modeling of this unique free-piston reciprocating expander utilizing phase controller is developed to understand and predict the performance of the new-type expander. Additionally, the operating parameters are analysed at the specified conditions to enable one to develop a more efficient free-piston type cryogenic expander. |
| Databáze: | OpenAIRE |
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