Reliability analysis in subsystem of heat supply

Subsystem of heat supply is one of three subsystems constituting heat supply system together with subsystem of heat production and subsystem of heat distribution. An analysis of failures in the heat supply subsystem has been presented in the article. The analysis of variety, frequency and causes of failures, for individual kinds of district heating network: main ones, distributional ones and heat supply connections in the example of heat supply system of 200000-inhabitants-city has been presented in the work. An analysis has been based on a real exploitation data of the heat distribution network, which had been obtained from Municipal Heat Supply Company during the period of time from 2003 to 2012. This paper contains the failure analysis of the heat distribution network depending on the technology of construction, diameters and age of network, kinds and causes of damages, place and time of failures' occurrences for various kinds of heat distribution networks. There have been determined basic reliability parameters such as: mean time between failures and the failure rate in the exemplary subsystem of heat supply. The failure analysis of heat distribution networks allows the operating instructions to develop, which can serve as a basis to determine the optimal repair periods and periods of highest danger emergency. It also influences on making more accurate decisions considering maintenance and repairs. This reduces the consequences of the failure, which is related to the maximum shortening of repair time and to decreasing the negative results of interruptions in the heat supply to the customers.

[1]  David Valis,et al.  Contribution to highly reliable items‚Äô reliability assessment , 2009 .

[2]  H. Wang,et al.  A reliability evaluation study based on competing failures for aircraft engines , 2014 .

[3]  David VALIŠ,et al.  On ApprOAches fOr nOn-direct determinAtiOn Of system deteriOrAtiOn , 2011 .

[4]  Bin Ma,et al.  Assessment on failure pressure of high strength pipeline with corrosion defects , 2013 .

[5]  A. Blokus-Roszkowska,et al.  Probabilistic model of district heating operation process in changeable external conditions , 2015 .

[6]  Arild Helseth.  Modelling Reliability of Supply and Infrastructural Dependency in Energy Distribution Systems , 2008 .

[7]  Ferdinando Salata,et al.  The reliability of technological systems with high energy efficiency in residential buildings , 2014 .

[8]  Małgorzata Kutyłowska,et al.  Failure analysis of water supply system in the Polish city of Głogów , 2014 .

[9]  Pengfei Liu,et al.  Failure analysis and safety evaluation of buried pipeline due to deflection of landslide process , 2012 .

[10]  Dariusz Kowalski,et al.  Failure of water supply networks in selected Polish towns based on the field reliability tests , 2013 .

[11]  K. A. Macdonald,et al.  Best practice for the assessment of defects in pipelines ¿ gouges and dents , 2005 .

[12]  Bożena Babiarz.  An introduction to the assessment of reliability of the heat supply systems , 2006 .

[13]  C. Guedes Soares,et al.  Reliability of pipelines with corrosion defects , 2008 .

[14]  Bożena Babiarz,et al.  Forecasting of failures in district heating systems , 2015 .

[15]  Tomasz Nowakowski,et al.  Maintenance Decision Making Process - A Case Study of Passenger Transportation Company , 2015, DepCoS-RELCOMEX.

[16]  Gintautas Dundulis,et al.  Development of approach for reliability assessment of pipeline network systems , 2012 .

[17]  Michael Todinov.  RELIABILITY ANALYSIS OF COMPLEX SYSTEMS BASED ON THE LOSSES FROM FAILURES , 2006 .

[18]  Bernardo Tormos,et al.  Maintenance Decision Making baseD on Different types of Data fusion poDejMowanie Decyzji eksploatacyjnych w oparciu o fuzję różnego typu Danych , 2012 .

[19]  David J Smith,et al.  Reliability, Maintainability and Risk , 2013 .

[20]  Zhong Zhi-tong.  Operational reliability evaluation of ship-to-air missile weapon system , 2011 .

[21]  David J Smith,et al.  Reliability, Maintainability and Risk: Practical Methods for Engineers , 1993 .

[22]  B Babiarz.  Heat Supply System reliability management , 2014 .

[23]  Sonny Myrefelt,et al.  The reliability and availability of heating, ventilation and air conditioning systems , 2004 .

[24]  Luciano Burgazzi,et al.  Failure mode and effect analysis on ITER heat transfer systems , 1998 .

[25]  Marta Woch,et al.  Reliability at the checkpoints of an aircraft supporting structure , 2015 .

[26]  Bernardo Tormos,et al.  Podejmowanie decyzji eksploatacyjnych w oparciu o fuzje{ogonek} różnego typu danych , 2012 .

[27]  Robert Pilch,et al.  Application of factoring and time-space simulation methods for assessment of the reliability of water-pipe networks , 2014 .

[28]  P. Ziembicki,et al.  Analysis of district heating network monitoring by neural networks classification , 2006 .

[29]  Carlos Guedes Soares,et al.  Contribution to highly reliable items’ reliability assessment , 2009 .

[30]  Enrico Zio,et al.  Reliability engineering: Old problems and new challenges , 2009, Reliab. Eng. Syst. Saf..