Adaptive reliability structures of heat exchange surface in turbine condenser

Abstract

Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionThe aim of the paper is to prove adaptive reliability structures of heat exchange surface, which stems from the matter of regulating the surface in order to maintain effective process of heat exchange by sustaining the requested pressure of steam condensation in variable exploitation conditions, which determines changes in the pipe system of the condenser and involves assessment of reliability of its surface of heat exchange.Adaptive reliability structures of surface of heat exchange (pipe subsystem) are the reliability structures, which are altered in the course of adjusting the pipe system to the actual exploitation conditions of the condenser in the power system.Having delved into the current state of the art with IT data bases (Science Direct, Knovel, Nauka Polska, BazTech, google) it was concluded that there has been no algorithm for assessing reliability of surface of heat exchange of steam turbine condenser which would include regulation of the surface in order to exchange the heat effectively and sustain the requested pressure of steam condensation in variable exploitation conditions, which has a significant influence on the quality of the technical power system exploitation, in which the condenser is a part.Publication [10] shows that sustaining given pressure of steam condensation in the condenser in variable conditions is vital for maintaining requested power efficiency of the technical power system. The aforementioned publication puts forward a particular technical solu-

Computer simulation of the reliability of the heat exchange surface of the steam turbine condenser

“…Reliability R ps , r ( t i ) of the heat exchange surface in the i th time t i of the condenser operation depends on the adaptation of certain reliability structures to the specified operating conditions of the condenser. The pipe subsystem reliability function R ps , r ( t ) results from the relationship between the adaptation of reliability structures to specific i th operating conditions { Q · i , k i , T ′ 2 , i , A i , max } ∧ { p 1 , i , T ″ 2 , opt , w 2 , opt } and the reliability of the pipe subsystem (heat transfer surface), according to articles 1,2 :…”

“…The algorithm of assessing exploitation reliability of pipe subsystem of steam turbine condenser in given time and conditions. 1 …”

“…Adaptive changes of the heat exchange surface allow: maintaining the desired value of energy efficiency of the technical energy system, maintaining the desired value of reliability and reducing the costs of pumping water cooling the condenser in relation to a condenser with a constant heat exchange surface, which was shown in the works. 1–3…”

“…Based on the examination of the state of knowledge with the use of IT databases (Science Direct, SCOPUS, Knovel, Nauka Polska, BazTech, Google), it appears that there is no exemplification of the relationship between the operating conditions of heat exchangers and the adaptation of the heat exchange surface and the adaptation of reliability structures in a specific time period. The works 1–3 contain algorithms that present the idea of changing the heat exchange surface in relation to changes in the operating conditions of heat exchangers.…”

“…Adaptive reliability structures of the heat exchange surface (pipe subsystem) are called reliability structures, the change of which takes place as a result of adapting the pipe systems to the current operating conditions of the condenser in the energy system. 1 On the other hand, the set of models that may undergo changes can be determined on the basis of known models of reliability structures of technical objects, included, among others. 12,13…”