Tsim Parameters thiab xam cov txheej txheem ntawm Plate Heat Exchangers

Cov qauv tsim thiab kev suav cov txheej txheem ntawm cov phaj kub hloov pauv feem ntau suav nrog cov hauv qab no:
Kev suav cov khoom siv hluav taws xob Q: Thaum tshav kub kub yog qhov tseem ceeb ntawm kev xaiv lub phaj kub hloov pauv thiab tuaj yeem suav nrog cov qauv Q=G ·ρ· CP · Δ t, qhov twg G sawv cev rau huab hwm coj tus nqi, ρ sawv cev qhov ntom ntom, CP sawv cev rau qhov muaj peev xwm kub, thiab Δ t sawv cev rau logarithmic txhais tau tias qhov kub thiab txias sib txawv.
Kev suav ntawm logarithmic txhais tau tias qhov kub thiab txias sib txawv Δ tlm: Cov kauj ruam no yuav tsum muaj kev nkag siab xws li lub npe ntawm cov khoom siv sab nraud, qhov kub thiab qhov hluav taws xob, thiab qhov ntws tawm, nrog rau qhov tsis xws li lub npe ntawm cov khoom kub sab nraud thiab qhov nkag thiab qhov hluav taws xob kub. Tom qab ntawd, raws li qhov ntsuas kub zoo ntawm cov khoom siv kub thiab txias (t=(t1+t2)/2), nug cov khoom vaj khoom tsev lub cev thiab sau ntau yam tsis xws li qhov ntom ntom, viscosity, tshwj xeeb tshav kub, thiab thermal conductivity. Phau ntawv suav yuav cia li xam cov ntaub ntawv tseem ceeb xws li logarithmic txhais tau tias qhov kub thiab txias sib txawv Δ tlm, hloov hluav taws xob, kub sab ntws tus nqi, thiab hluav taws xob hloov hluav taws xob.
Kev daws teeb meem ntawm thawj sab loj: Cov kav dej qhov ntev ntawm lub hauv paus thiab theem nrab tuaj yeem suav tau raws li qhov ntws nrawm ntawm qhov nruab nrab.
Kev txiav txim siab ntawm thaj chaw sib pauv cua sov F: Raws li Tshooj 15-7 ntawm "Chemical Process Design Manual" (Fourth Edition, Volume 1), peb tuaj yeem paub tias xaiv thaj chaw ntawm daim hlau yog ib kauj ruam tseem ceeb hauv kev tsim cov phaj kub exchangers. . Feem ntau, peb siv cov qauv yooj yim tshaj plaws: Q=K × F × t, qhov twg K yog lub tshav kub hloov coefficient, Q yog lub tshav kub load, thiab t yog qhov kub hloov pauv kub sib txawv.
Zuag qhia tag nrho, kev nkag siab thiab paub txog cov qauv tsim thiab kev suav cov txheej txheem ntawm cov phaj kub hloov pauv yog qhov tseem ceeb tshwj xeeb rau kev ua kom lawv cov kev ua haujlwm ib txwm muaj thiab txhim kho lawv cov kev hloov hluav taws xob.