?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F298%2F&rft.title=Scroll+Optimization&rft.creator=%3D%2C+%3D&rft.subject=Materials&rft.description=The+scroll+compressor+consists+of+two+plane+spiral%2Fhelix+running+inside+each+other%2C+traditionally+both+scrolls+are+the+same+circle+involute+with+constant+wall+thickness.%0D%0AWhen+the+moving+scroll+follows+a+circular+orbit+the+chambers+moves+inwards+and+the+air+or+fluid+trapped+in+the+chambers+is+compressed.+In+the+standard+circle+involute+scroll+compressor+the+volume+of+the+compression+chambers+grows+linearly+when+we+move+outwards+and+the+compression+rate+of+such+a+compressor+is+sufficient+for+air+condition%2C+but+not+for+freezers+or+refrigerators.+One+could+try+to+increase+the+compression+rate+by+having+more+chambers%2C+but+that+would+increase+the+leakage+too.%0D%0A%0D%0AThe+task+was+to+investigate+how+a+change+in+the+basic+geometry+of+the+scrolls+and+the+orbit+influence+the+compressor+performance+and+efficiency%2C+and+then+try+to+optimize+the+design.%0D%0A%0D%0AWe+have+not+done+any+optimization%2C+but+we+believe+we+have+found+a+sound+foundation+for+the+optimization+process.+We+can+represent+the+geometry+of+the+problem+in+a+way+which+leads+to+closed+expressions+for+all+the+geometric+quantities+which+are+interesting+for+the+scroll+design.+We+have+also+analyzed+the+leakage+between+the+compression+chambers%2C+and+using+a+compressible+lubrication+model+we+have+determined+an+expression+which%2C+appart+from+one+integration%2C+leads+to+a+closed+expression+for+the+leakage.&rft.date=1998&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpostscript&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F298%2F1%2Fdanfoss.ps&rft.identifier=++%3D%2C+%3D++(1998)+Scroll+Optimization.++%5BStudy+Group+Report%5D+++++