no F (< 1) yog txhais raws li qhov kho qhov ntsuas geometric, uas thaum siv rau LMTD (Log Mean Kub Difference) ntawm lub txee ntws tawm hluav taws xob, muab qhov kub zoo sib txawv ntawm qhov Thaum tshav kub kub exchanger nyob rau hauv kev txiav txim siab.
Vim li cas peb thiaj li siv qhov kho qhov ntsuas kub hauv qhov sib hloov hluav taws xob?
Qhov kho kom raug yog ntsuas ntawm cov khoom siv hluav taws xob tawm mus los ntawm kev coj tus cwj pwm zoontawm cov khoom siv hluav taws xob hluav taws xob uas muaj qhov sib txawv ntawm qhov ntsuas kub. Qhov kho kom raug yog nyob ntawm qhov ua tau zoo ntawm qhov kub thiab qhov sib piv ntawm qhov muaj peev xwm kub rau ib qho kev khiav dej num.
Dab tsi yog qhov kho kom raug LMTD?
Vim li no qhov kev hloov kho 'F' yuav tsum tau qhia nyob rau hauv kev sib npaug ntawm cov cua sov thiab qhov sib npaug yog hloov raws li Q=UA (F) LMTD. Qhov kev hloov kho no 'F' nyob ntawm seb muaj pes tsawg lub plhaub ntawm cov khoom siv hluav taws xob thiab ntawm qhov ntsuas kub ntawm lub tshav kub exchanger.
Dab tsi yog qhov xav tau rau kev kho qhov cuam tshuam hauv lub plhaub thiab lub raj xa hluav taws xob?
Nyob rau hauv feem ntau lub plhaub thiab lub raj sib hloov cov dej ntws yuav yog sib xyaw ntawm cov khoom sib xws, ntsuas tam sim no thiab hla ntws. F kho qhov tseem ceeb nyob ntawm qhov geometry ntawm lub tshav kub exchanger thiab qhov inlet thiab qhov hluav taws xob kub ntawm cov dej kub thiab txias ntws.
Kev kho FT yog dab tsi?
A 'ft kho qhov tseem ceeb' txhais tau tias yog tus piv ntawm qhov tseeb txhais tau tiasqhov sib txawv ntawm qhov kub thiab txias rau qhov ntsuas qhov ntsuas qhov sib txawv(saib Eq(2)). Qhov 'ft kho qhov tseem ceeb' tus nqi yuav tsum siab dua 0.75 rau lub tshuab hluav taws xob sib hloov kom ua tau.
