Nghiên cứu mô phỏng fluent CFD và thực nghiệm quá trình truyền nhiệt trong thiết bị sưởi ấm dịch truyền dùng trong y tế

NGHIEN cufu - TRAO DOI "^NGHIEN C(yU MO PHONG FLUENT-CFD VA THLTC NGHEM QUA TRINH TRUYEN NHIET TRONG THIET Bj SU'dl AM DICH TRUYEN DUNG TRONG Y TE FLUENT-CFD SIMULATION AND EXPERIMENTAL HEAT TRANSFER PROCESS IN INFUSION WARM DEVICES FOR MEDICAL USE Nguyen Ti^n DongS Nguyen Thi Phiidng Giang', DUdng Van Huy^, Vu Dinh Dung', Phan Quang D6^ 'Vien Cd khi, TrUdng Dai hpc Bach Khoa Ha Ngi ^Vien Dupe lieu 'Vu Khoa hpc Dao tao, Bp Y te TOM TAT Sudi dm dich truyen giup gidm toi da cdc dnh hUdng ve nhiet qud trinh truyen dich cho benh nhdn, ndng cao hieu qud cua dich truyen Nhieu thiet bi sUdi dm dUdc nghien cdu, sii dung cdc mo hinh truyen nhiet khdc de dat dUdc hieu qud sUdi dm dich truyen Mo hinh Sngxoan dang Id xo dUdc diing nhieu bdi todn truyen nhiet tai cdc nhd mdy dien, Id phdn Ung hat nhdn, dien Ignh, xd ly dieu hoa khong khi, cdng nhU cdc thiet bi trongy te Tuy nhien, xdc dinh quy ludt qud trinh truyen nhiet cdc he thong dgc biet quan trgng, lien quan den hieu qud vd sU an todn cua he thong Bdi hdo ndy trinh bdy nghien cUu qud trinh truyen nhiet thiet hi sUdi dm dich truyen vdi md hinh xoan loxo bdng phUdngphdp mo phong Fulent-CFD, dUdckiim chdng bdngthUc nghiem TU khoa: Mo phong, thiet biy te, sUdi dm dich truyen, Fluent-CFD ABSTRACT In the infusion, warm devices helps a patient to reduce bad effect of heat, to increase potency of the drug Helically coiled heat exchangers are the important engineering systems with wide variety of applications including power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, chemical processing, food industries and medical devices Control process transfer heat is really importance for safety This paper shows the results CFD & experiment of heat transfer in infusion warm devices Keywords: Simulation, medical equipments, infusion warm device, Fluent-CFD TAP CHi CO KHi VIET NAM, S6 nam 2014 www.cokhivietnam.vn NGHIEN C U T U - T R A G D O I GlOtI THIEU long dng xoan 16 xo nam 2008, va ddng chay ddn 16 xo 2010 bang thdc nghiem va Kha nang trao doi nhi^t ciia dong chay modul mo phong Fluent cua CFD, cho thay ket ong xoan dang 16 xo dUpc Ung dung qua cua mo phong la phii hdp vdi ket qua cua cac nha may dien, 16 phan Ung hat nhan, thuc nghiem [4],[3] Nam 2010, Ivaan Di Piazza dien lanh, sU dieu hoa khong khi, he thong thu cung cac cpng sU da thu dugc ket qua tinh toan hoi nhiet ciing nhU cac thiet bi y te [ 10] cho ddng chay rdi va nhiet truyen thdng qua Khi dong chat long chay 6ng xoan se chiu dudng ong xoan dang 16 xo He so Nusseft dUdc lUc li tam K^t qua la lUc la nguyen nhan tinh toan qua cae mo hinh roi khac va cho hinh ddng thU cap ong xoan Dong thay mo hinh RSM-to cho ket qua tot hdn sd vdi thd cap anh hu6ng tich chat dpng hpc, dong cac mo hinh khac [1] chay, dp nhott ciia chat long ong va lam tang dang ke kha nang trao doi nhiet eiia ehat Bai bao trinh bay nghien cdu qua trinh long ong vdi vach ong Do dong truyen nhiet thiet bi sUdi am dieh truyen chay thd cap la hai xoay vuong goc vdi hUdng vdi md hinh xoan 16 xo, phan tich sU phan bo dong chay dpc theo chieu dai ong, truyen nhiet nhiet ddng chat Idng tren chieu dai day lue khong ehi xay bang each khuyech tan truydn bang cong cu Fluent-CFD va duge kiem theo hudng xuyen tam ma bdi sU doi lUu chUng bang thUe nghiem [2],[6|,|111 Mpt nhdng nghien cUu sdm ve tinh chat cua dong chay ong xoan dang 16 xo cua Dean da dUa cong thUc xap xi eho he so dac trUng eho ddng chay ong xoan dUa tren he so Reynolds va ty le giUa dUdng kinh ong va dUdng kinh uon Ong ket luan rang dong chay ong cong on dinh hdn so vdi dong chay ong thang [12] Nam 2004, Devarahalli cung cac dong nghiep da thUc dieu tra thUe nghiem truyen nhiet doi lUu tU nhien til ciia mo hinh ong cupn xoan nUdc Ong da xay dUng phUPng phap de dU doan nhiet dp dau cua dong chay va he so dan nhiet dUa tren dieu kien dau vao cho ket qua rat gan vdi thdc nhiem [7] Nam 2012, Pramod Purandare ciing cac cgng sU thUc hien mgt phan tich so sanh cdc moi tUPng quan khac dupe dUa bdi cac nha nghien cUu cho trao doi nhiet dng xoan 16 xo; Ket qua nghien cdu eho ring ty so dUdng kinh ong va dUdng kinh vong cugn inh hUdng manh tdi dong chay thU cap [8] J.S Jaya kumar cung cac cgng sU da thUc nghien cUu trao doi nhiet chat long tdi chat CAC THONG SO THIET BI S l / d l AM DICH TRUYEN 2.1 Thong sd md hinh thiet hi sUdi am dich truyen Thiet bi sUdi am dich truyen d nghien eUu gom cd mpt thiet bi gia nhiet dang hinh tru lam bang dong va dUpc tao ranh xoan nhu hinh 1, vdi cae thdng sd (dUdng kinh ngoai eua tru D=70mm, dUdng kinh d=46mm, ehieu dai L = 90 mm, bUdc cua ranh xoan ong t = 6.5 mm, ranh xoan dUdng kinh d'=4mm) va day truyen dich dUdng kinh 4mm theo ehuan cua Bo Y te theo hinh Hinh 1: Thiet bisUdi dm dich truyen TAP CHi CO KHI VIET NAM, Sd nam 2014 n\\\\.CDkhivietnam.vn NGHIEN cufu - TRAO D O I PhUdng trinh dpng lUc: d\ ,M^^^,_ —1 t^".^^-^*V\^ fin:; dx dx Sx, ' ^ PhUdng trinh nang lUdng: dx dx- Pr & Hinh 2: Ddy truyen dich QUA TRINH THU'C NGHIEM Trong thiet bi sUdi am dich truyen qua trinh truyen nhiet la qua trinh tru dong dUde cap nhiet tdi nhiet on dinh 42*'C (315 K), sau nhiet dugc truyen qua day truyen dich dupc cuon quanh ong dong tdi dich truyen de dat dUdc nhiet dp mong mudn Dich truyen dung thi nghiem la H^O nguyen ehat d nhiet dp 5°C {278K) Toe dp dich truyen day truyen dieh la 80 gipt/ phut 2.2 Thong sd tinh toan mo phong He so Reynolds: Re K Hinh 3: Dich truyen Cae he so dUpc sU dung de tinh toan phan tich truyen nhiet qua cupn xoan 6c dUpc cac nha nghien eUu khac sU dung: pud (1) Hinh 4: KD-133 3.1 Dung dich thi nghiem Dich truyen la nUdc muoi sinh ly vdi cac thdng so chuan eua Bp Y te vdi nhiet dp dich truyen ban dau S'^C, hinh 3.2 Thiet bi He so D e a n : o ^ ^ ^ ^ , ^ " (2) Nhiet ke dien tU dau mem khdng tham nude Polygreen KD-133, hinh Nu = 0.023 R e " ' P r "