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Valves timing of compressor for CO2 refrigerant
Kamenický, Robin ; Kobský, David (oponent) ; Hejčík, Jiří (vedoucí práce)
Together with an endeavour to decrease companies’ costs and costs of their customers, significant effort to decrease an impact on the environment in the last decades was made. To do so a development is the crucial step. This paper is focused on a development of a CO2 reciprocating compressor, which is produced by Emerson Climate Technologies. The diploma work goal is to increase the compressor COP, while maintaining its durability. The document is divided into a few chapters, which address an analysis of an original compressor design, a description of a new design proposals and an evaluation of the new designs. Necessary theoretical knowledge base is also provided. In the last document part, can be read about other design possibilities and improvements. The main compressor part, for the development, was a valve plate assembly. Base on a few assumptions and original valve plate analyses, the new designs were suggested and subsequently tested as static structural problems. Natural shapes and frequencies of suction valve were determined by modal analysis. Apart from the modal and static structural analyses a CFD analysis was performed. In the last step, prototypes were tested and results were compared with the original compressor design. Software support was necessary for successful designing, thus mainly MATLAB, ANSYS WB and Microsoft Excel were used. Especially results obtained in ANSYS WB are frequently presented in this work.
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Valves timing of compressor for CO2 refrigerant
Kamenický, Robin ; Kobský, David (oponent) ; Hejčík, Jiří (vedoucí práce)
Together with an endeavour to decrease companies’ costs and costs of their customers, significant effort to decrease an impact on the environment in the last decades was made. To do so a development is the crucial step. This paper is focused on a development of a CO2 reciprocating compressor, which is produced by Emerson Climate Technologies. The diploma work goal is to increase the compressor COP, while maintaining its durability. The document is divided into a few chapters, which address an analysis of an original compressor design, a description of a new design proposals and an evaluation of the new designs. Necessary theoretical knowledge base is also provided. In the last document part, can be read about other design possibilities and improvements. The main compressor part, for the development, was a valve plate assembly. Base on a few assumptions and original valve plate analyses, the new designs were suggested and subsequently tested as static structural problems. Natural shapes and frequencies of suction valve were determined by modal analysis. Apart from the modal and static structural analyses a CFD analysis was performed. In the last step, prototypes were tested and results were compared with the original compressor design. Software support was necessary for successful designing, thus mainly MATLAB, ANSYS WB and Microsoft Excel were used. Especially results obtained in ANSYS WB are frequently presented in this work.
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