Heat Pump ... - HPC'01

principles of heat and mass transfer to a resorption system, combining the benefits ... of simultaneous equations, most of which are non-linear and implicit, which ...
221KB taille 5 téléchargements 321 vues
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

9$3285$%62537,21 6@$VVXFKRQH ZRXOGH[SHFWWKH*$;KHDWSXPSF\FOHWRKDYHD&23KHDWLQJ VLPLODUWRWKDWRIDGRXEOHHIIHFW9$F\FOHLHLQWKHRUGHU RI>@ ,Q *$; V\VWHPVKHDWLVH[FKDQJHGEHWZHHQWKHVWURQJDQG ZHDN VROXWLRQV LQ WKH PDQQHU GHVFULEHG DERYH 7KH WZR GLVWLQFW GLIIHUHQFHV EHWZHHQ WKLV DUUDQJHPHQW DQG D VLPSOH KHDWH[FKDQJHUDUH x ,Q D VLPSOH KHDW H[FKDQJHU WKH KHDW H[FKDQJH WDNHV SODFHDWQRFRQFHQWUDWLRQYDULDWLRQWRHLWKHURIWKHWZR VROXWLRQV ,Q D *$; V\VWHP KHDW LV H[FKDQJHG DW YDU\LQJFRQFHQWUDWLRQLHERWKKHDWDQGPDVVWUDQVIHU WDNHSODFH x +HDW H[FKDQJH RFFXUV DW VPDOOHU WHPSHUDWXUH GLIIHUHQFHV LQ *$; V\VWHPV WKDQ LQ WKH KHDW H[FKDQJHUVRIFRQYHQWLRQDO9$V\VWHPV

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