Abstract
The new approach was developed to analyze the failure causes in operation of linear facilities independent power supply sources (mini-CHP-plants) of gas-transmission system in Eastern part of Russia. Triggering conditions of ceiling operation substance temperature at condenser output were determined with mathematical simulation use of unsteady heat and mass transfer processes in condenser of mini-CHP-plants. Under these conditions the failure probability in operation of independent power supply sources is increased. Influence of environmental factors (in particular, ambient temperature) as well as output electric capability values of power plant on mini-CHP-plant operation reliability was analyzed. Values of mean time to failure and power plant failure density during operation in different regions of Eastern Siberia and Far East of Russia were received with use of numerical simulation results of heat and mass transfer processes at operation substance condensation.
Highlights
Powering is an important aspect of any production
Values of mean time to failure and power plant failure density during operation in different regions of Eastern Siberia and Far East of Russia were received with use of numerical simulation results of heat and mass transfer processes at operation substance condensation
Numerical researches are performed at typical values of parameters works of considered condenser installations of independent sources of power supply (Fig. 2): reference temperature of actuation medium on an entrance to the condenser T1 = 403 K; heat effect of condensation of Qc = 311.7 kJ/kg; sizes of area of the decision Hx = 400 mm, Hy = 1500 mm; molecular mass dichlorobenzene M = 147 kg/kmol; the nondimensional coefficient of evaporation = 0.1; speed of a working body in the condenser V1 = 0.01 m/s; heat-transfer coefficient at condensation of vapors of dichlorobenzene in the condenser channel 1−2 = 650 W/(m2·K)
Summary
Powering is an important aspect of any production. Stable supply necessary for the implementation of technological processes of energy determines the stability of the enterprises. For powering gas pipelines in the Far East of Russia, independent energy sources are used with a closed thermodynamic cycle of power up to 4 kW (Fig. 1). Such sources operate on natural gas and are characterized by a considerable duration of automatic operation and a high value of thermal efficiency. The purpose of article – the analysis of operation modes of independent power installations which cause failures because of extremely high temperature in the condenser, and time between failures determination taking into account climatic conditions of the Far East of Russia
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