Week 4 and 5 Lecture in Air Conditioning

 

Yooh 4 & ?= Zsykfranotry ae Bgr Ka`dga`g`i Zrakossos G. G`traduktga` Tfgs cossa` dobcs wgtf tfo lbsgk lbsgk bgr ka`dga`g`i prakossos sukf bs so`sglco fob`i, so`sglco kaacg`i, fungdgeyg`i, dofungdgeyg`i, fob`i b`d fungdgeyg`i, kaacg`i b`d dofungdgeyg`i, fob`i b`d dofungdgeyg`i ar kfongkbc dofungdgeyg`i, b`d tfo bgr ngxg`i prakossos. Obkf prakossos gs dgskussod wgtf tfo karrospa`dg`i skfonbk b`d psykfranotrgk dgbirbns.

GG. Almoktgvos Bor kanpcoa` ae tfo kaurso tfo studo`t sfaucd lo blco ta= 2. Almokvo 2 R 2/v2 > nbss aw rbto ae dry bgr, hi/s

 

R 2

> Uacuno rbto ae bgr o`torg`i tfo fobtor, n;/s

v2

> spokgk vacuno ae tfo o`torg`i bgr, n;/hi

f2

> o`tfbcpy ae bgr o`torg`i tfo fobtor, hM/hi d.b.

f<

> o`tfbcpy ae bgr cobvg`i tfo fobtor, hM/hi d.b.

n(f2 ‛ f Ta`s ae roergiorba` 2 T\ > ;.?29 hY

 

;. Fungdgeyg`i Zrakoss gs b prakoss ae g`krobsg`i tfo fungdgty rba wgtfaut kfb`ig`i tfo dry-lucl tonporbturo ae tfo bgr. Tfo prakoss gs roproso`tod g` tfo psykfranotrgk kfbrt ly b vorkbc cg`o (upwbrd)  Bppcgkbta`= Bgr g` b dukt pbssg`i tfrauif tfo sprby ae wbtor

Bnau`t ae nagsturo bddod= nv > n(Y n(Y2 ‛ Y n(Y n (f< ‛ f2)

5. Kaac Kaacg` g`i i b`d D Dof ofun ungd gdge geyg yg`i `i gs b prakoss ae sgnuctb`oaus kaacg`i b`d dofungdgeyg`i ae bgr

pbssg`i tfrauif b kaacg`i kagc ar bgr wbsfor. Tfo bktubc prakoss gs dgkuct ta sfaw a` b kfbrt. Gt waucd dopo`d a` tfo typo ae oqugpno`t usod. Lut g` io`orbc tfgs kb` lo g`dgkbtod ly daod kurvo cg`o. Tfgs prakoss gs kanna`cy usod g` sunnor bgr ka`dga`g`i g` wfgkf bgr pbssos avor b kacd kagc ar tfrauif b kacd wbtor sprby. Tfo bgr gs kfgccod k fgccod locaw gts dow-pag`t tonporbturo, tfus ka`do`sg`i aut nagsturo. Tfo `bc \F io`orbccy gs fgifor tfb` tfo g`gbc \F. 

Bppcgkbta`= Bgr g` b dukt pbssg`i avor b kaacg`i kagc ar tfrauif b` bgr wbsfor

 

Bnau`t ae nagsturo ronavod= nv > n(Y2 ‛ Y n (f 2 ‛ f<  

KDB ‛ kaacg`i b`d Dofungdgeyg`i bppbrbus, g kaucd lo b` bgr wbsfor ar kaacor kagc

 

BDZ ‛ Bppbrbus dow-pag` onporburo.

9. Kaac Kaacg` g`i i b` b`d d Fun Fungd gdge geyg yg`i `i gs b prakoss ae sgnuctb`oaus kaacg`i b`d fungdgeyg`i ae bgr pbssg`i tfrauif b sprby ae wbtor. Tfgs prakoss gs io`orbccy h`aw` bs bdgblbk sbturba`, wfgkf gs b

sgnuctb`oaus prakoss ae kaacg`i b`d fungdgeyg`i wgtfaut kfb`ig`i tfo wot-lucl tonporbturo. t onporbturo.

 

       

   

 

 Bdgblbk ‛ nob`s `a fobt gs bddod ar ronavod oxtor`bccy oxto r`bccy [bturba` ‛ gnpcgos bddg`i nagsturo Tfgs gs b` bka` tfbt tbhos pcbko g` b` ardg`bry bgr wbsfor g` wfgkf tfo sbno wbtor gs ka``uauscy rokgrkucbtod, lut gs `ogtfor fobtod `ar kaacod. \okgrkucbtod wbtor gs sprbyod g`ta tfo bgr, b`d pbrt ae gt ovbparbtos g` tryg`i ta sbturbto tfo bgr. Ge tfgs sprbyg`i gs ookvo o`auif, tfo bgr cobvos tfo sprby 2::% sbturbtod. Tfo`, bor oqugcglrgun gs ostblcgsfod, tfo bgr wgcc cobvo bt tfo tonporbturo ae gts YL, b`d tfo rokgrkucbtod wbtor wgcc lo bt tfo sbno tonporbturo. Tfgs prakoss gs g`dgkbtod a` tfo kfbrt bs b cg`o pbrbccoc ta tfo YL cg`os eran tfo o`torg`i bgr ka`dga` ta tfo sbturba` cg`os ar kurvo. Ovbparbvo Kaacg`i gs ookvo g` fat dry kcgnbtos wfo` tfo kaacor fungd ka`dga` gs naro dosgrblco tfb` tfo fat dry ka`dga`. Gt sfaucd lo rokanno`dod tfbt tfo cobvg`i YL tonporbturo sfaucd `at lo cawor tfb` tfo sprby-wbtor tonporbturo. \ocbvo fungdgty gs rbgsod.  Bppcgkbta`= Zrakoss ae ovbparbvo kaacg`i

 

6. Kfo Kfongk ngkbc bc Dofung Dofungdge dgeyg` yg`i i Zrak Zrakoss oss gs b sgnuctb`oaus fob`i b`d dofungdgeyg`i prakoss. Bgr kb` lo dofungdgod ly pbssg`i tfo bgr avor b kfongkbc tfbt fbs b` b`gty ear nagsturo. a

_subccy, g` sa dag`i, tfo nagsturo gs ka`do`sod b`d igvos up gts cbto`t fobt, rbgsg`i tfo DL tonporbturo ae tfo bgr. Tfo bgr cobvos drgor lut wbrnor. Tfo YL tonporbturo nby g`krobso ar dokrobso. _`gts onpcayg`i sukf kfongkbcs bro usod g` sano kanpart bgr-ka`dga`g`i g`stbccba` lut `arnbccy ear g`dustrgbc bgr ka`dga`g`i.  

7. Bg Bgrr Ngxg Ngxg`i `i ar Ngxg Ngxg`i `i Bgr Yfo` bgr bt a`o ka`dga` gs ngxod wgtf bgr bt b`atfor ka`dga`, tfo ka`dga` ae tfo `bc a

ngxturo kb` lo g`dgkbtod a` tfo psykfranotrgk kfbrt ly b pag`t a` tfo cg`o mag`g`i tfo pag`ts g`dgkb`i tfo argig`bc ka`dga`s, bs sfaw` g` tfo iuro locaw. Tfo oxbkt cakba` ae tfo `bc pag`t wgcc dopo`d upa` tfo rocbvo wogifts ae dry bgr g` tfo argig`bc bgr qub`os    Bppcgkbta`= Ngxg`i ae autdaar bgr b`d rokgrkucbtod bgr ta lo suppcgod ta b` bgr ka`dga`od spbko.

.

 

Cot

n f Y DL

> > > >

nbss aw rbto ae dry bgr, hi/s o`tfbcpy ae nagst bgr, hM/hi fungdgty rba, hi/hi d.b. dry-lucl tonporbturo, ºK

DZ

>

dow-pag`t tonporbturo, ºK

Nbss lbcb`ko ae dry bgr= n; > n2 + n< Nbss lbcb`ko ae nagsturo= n;Y; > n2Y2 + n

n 2 Y 2+ n< Y < n 2+ n <

O`oriy lbcb`ko g` torns ae o`tfbcpy= n;f; > n2f2 + n

n2 f2 + n< f< n 2 + n<

O`oriy lbcb`ko g` torns ae dry-lucl tonporbturo= n;DL; > n2DL2 + n

n 2 DL 2+ n n2DZ2 + n

n2 DZ 2+ n