Lokalizacja nieszczelności w rurociągach przesyłowych cieczy z wykorzystaniem metody gradientowej - studium przypadku

摘要

Praca dotyczy diagnozowania wycieków z rurociągów przesyłowych cieczy. Celem pracy jest określenie charakterystyki metody gradientowej, z oznaczeniem możliwego poziomu wykrywalności wycieków i błędów ich lokalizacji, na przykładzie jej użycia na rurociągu modelowym o 380-metrowej długości. Przedstawiono ogólną charakterystykę metody, metodykę jej zastosowania oraz uzyskane wyniki badań z symulowanymi wyciekami. Wskazano na zalety i wady metody gradientowej.%This study concerns diagnosing of leakages from liquid transmission pipelines. In the introduction the problems related to diagnosing leakages from liquid transmission pipelines occurring in engineering practice are discussed. It is pointed out that construction and working of an effective and reliable leak detection system (LDS) requires use of several diagnostic methods. The methods usually work concurrently and are initiated by suitable synchronization algorithms which are used to detect changes in the state operation of a pipeline. The existing, particular leak diagnostic methods are only useful for a specified operation state of a pipeline and characteristics of the appearing leakage. In the case of pipeline operation under steady state conditions, detection and localization of single and multiple leakages can be quite effectively realized by the gradient method. This paper describes the gradient method and gives an example of its using on a laboratory testing stand with a 380-meter long model pipeline. The determination of a possible level of detecting leakage errors and leakage localization is presented in the paper. In the first section the description of leak phenomena and general characteristics of the gradient method are presented. In the next section a laboratory test stand is shown and conditions of the conducted tests with simulated leakages are discussed. Next, the methodology of application of the gradient method to diagnosis of simulated leakages and the obtained results (Tables 2, 3, 4) are presented. The advantages and disadvantages of the gradient method are pointed out.