英语翻译Exploitational optimization.After completion of technological and thermal optimizations the projecting calculation,as a rule,finishes.In case of designing of the heat exchanger under concrete condition of the heat power system,as a rule,t

英语翻译Exploitational optimization.After completion of technological and thermal optimizations the projecting calculation,as a rule,finishes.In case of designing of the heat exchanger under concrete condition of the heat power system,as a rule,t
英语翻译
Exploitational optimization.After completion of technological and thermal optimizations the projecting calculation,as a rule,finishes.In case of designing of the heat exchanger under concrete condition of the heat power system,as a rule,there are padding exploitational requirements.In the basis of such requirements there can he two groups of problems:at first,maximum reliability and resource of activity; secondly,maintenance of some demanded technological (exploitational) parameters or properties.For the solution of.such problem it is necessary to execute verifying calculation of the compact heat exchanger and to analyze fields of temperatures of a heat-transport surface and heat carriers for conformity to concrete operational requirements.
In the basis of algorithm of the program there is used.the designed two dimensional mathematical model of calculation of heat,transfer in the cross-precise compact plate-ribbed heat exchanger,consisting of a system of differential equations of energy for hot and-cold heat carriers and equations of heat transfer.The solution of system is implemented by the numerical method,for what the system of differential equations was.exchanged with the help of.method of finite differences by grid equations on a grid 10x10 _..40x40 of clusters.The calculation of heat transfer thus was executed sequentially for each elementary,site AxAy before obtaining with given accuracy in 0,Ol "C of values of temperatures of a wall,cold and hot heat carrier.The model allows heat and mass transfer in cold and hot channels (with allowance.for heat and mass transfer in a boundary layer) and.feature of heat transfer on initial.segments of’channels,according to designed earlier to techniques [4].As a result,.of calculations the two dimensional.fields of temperatures of hot; cold heat carrier and.heat- transport surface on a grid with demanded accuracy were determined.
As creation of an.exploitational optimality one limitation often meeting was used:In case of activity of compact heat exchangers on regimes with air-steam cooling [4-61] the calculation of fields of temperatures of a heat-transport surface and matching with technological (exploitational) demanded parameters is carried out.
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英语翻译Exploitational optimization.After completion of technological and thermal optimizations the projecting calculation,as a rule,finishes.In case of designing of the heat exchanger under concrete condition of the heat power system,as a rule,t
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