On Experimental Errors in P-V Diagrams
نویسندگان
چکیده
It is common practice to fold pressure-time diagrams of compressors into pressure-volume diagrams because the latter are of special thermodynamic significance. For example, the enclosed area represents piston work. The folding is accomplished utilizing knowledge of the top dead center position and kinematic relationships of the compressor. It was found that even a small measurement error of the top dead center position may change the pressure-volume diagram significantly. Also, the influence of pressure transducer calibration error was investigated. Furthermore, errors associated with the present method of locating suction and discharge pressures with the aid of valve opening data is discussed.
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