NGHIEN cuu - TRAO DOI X^y dung phan nndm thiet k^ may t^ng sOi lign tuc Ung dung sdy mudi tinh (*) BUI TRUNG THANH NGUYEN PHAM DlTC QUYNH Gioi thieu Cong nghe saj' tang sdi duoc xem la mot so cac cdng nghe hien dai dang dugc khuyen khich nghien cim img dung say cac loai vat lieu rdi nganh che bien thuc pham, dugc lieu vl hda chat d Viet Nam [7] Nhirng nam gan day, cic phuong tien truyen thong da cong bd nhieu cong trinh irng dung nguyen ly say tang soi de thiet ke say nhieu loai san pham dat ket qua khich le, dd cd lanh -vuc say mudi tinh tang sdi lien tuc thay the cho cong nghe say bang may say thung quay hoac say tren may say rung tang soi [7] Thuc te cho thay, de thuc hien thiet ke hoin chinh mgt he thdng say, ngudi thiet ke phai giai quyet mot khoi lugng Idn cong viec de giai bai toan say tang sdi Toan bg cac noi dung cua bai toan thiet ke phai giai tren may tinh bam, do, cd nhieu phep tinh phai sir dung phuong phap tinh lap, tinh di, tinh lai nen khd tranh khdi cic sai sdt dan den san pham thiet ke sai nhieu ldi, ml ngudi thiet ke kho, tham chi 11 khdng the nhan dugc cho den may say dugc che tao xong mdi hay biet Ket qua tiep theo la phai tien hanh hieu chinh lai cic thong so, hieu chinh kich thude che tao, tham chi phai che tao lai Cic sai sdt tinh toan va thiet ke da gdp phan lam tang chi phi che tao, keo dii thdi gian hieu chuan thiet bi, gay trd ngai cho cdng tac phit trien cdng nghe say tang soi Xuat phat tir cic ly thuc te tren, yeu can can phai cd mgt phan mem de hd trg viec tinh toin thiet ke may say tang soi Phan mem dugc xay dung phii bao dam dugc cac yeu can ciia cong nghe say tang sdi, trg giup dac luc cho ngudi sir dung thuc hien tinh toan thiet ke may say tang soi nhanh, sd lieu chinh xac hon, day nhanh tien tinh toan thiet ke Tir y nghia vl muc dich dd, chung tdi gidi thieu tdi ban dgc "Phan mem sir dung thiet ke may say tang soi lien tuc" Cic phan tinh toan cua phan mpm gdm: tinh toin qui trinh say ly thuyet, tinh toan qua trinh say thuc, xac dinh khong gian say, tinh toin thiet bi phu (Ghi phan phoi Cyclone, budng dot cap nhiet gian tiep, calorifer - khdi Trong khuon khd bai bao, chimg tdi xin khdng trinh bay phan tinh toin thiet hi phu Dir lieu va phuong phap 2.1 Cac van de chung De cd the xay dung dugc mgt phan mem thiet ke ml}', van de trudc tien la ngudi thiet ke phii nam virng ciing nhu phai thuc hien dugc cac noi dung co ban ciia cong tac thiet ke mly^ cu the nhu sau: - Nam •virng dugc cac van de ly thuyet co bin cua cdng nghe say tang sdi, su khac biet co ban ciia nguyen ly say tang sdi so vdi cac nguyen ly say tinh va say dong - Biet thuc hien tuan tu cac budc de giai bai toin say ly thuyet, bai toin say thuc De thuc hien tinh toan thiet ke mo hinh may, ngudi thiet ke phai thuc hien hai ndi dung co ban 11: tinh toan qua trinh say thdng thudng vl tinh toan xlc dinh cac thong sd van tdc tac nhan say de tao che say ldp hat sdi on dinh khong gian say Cu the: De thuc hien dugc hai noi dung tinh toan ndi tren, phai tien hanh thuc hien cac budc nhu sau: -Xac dinh cac tinh chat vat ly ciia vat lieu am c ^ say (do am vat lieu dau vio, dau ra, dang lien ket am, nhiet dung rieng, dan nhiet, kich thude hat vat lieu [5] [6] (*) Khoa Cong nghe Nhiet lanh - Dai hoc Cong nghiep TP HCM TAP C H i c a KHi VIET NAM < • So 07-Thang nam 2010 NGHIEN cuu-TRAODOI - Xac dinh van toe hda soi ldp hat toi thieu, van toe soi toi uu va van toe lam loi cuon hat vat lieu say [9] - Giai quyet bii toin say ly thuyet, xac dinh cac thdng sd ciia tie nhan say, luong tac nhan tieu thurieng,nhiet lugng tieu haorieng,tmh toan trao ddi nhiet ddi luu giira tac nhan say vl vat lieu am say tang sdi [8] -Thuc hien giii quyet bai toin say thuc tren co sd thiet ke dugc khdng gian say (xac dinh dugc ket can ciia buong say hat, budng phan ly hat say khdi ludng thai, ghi vat lieu say va phan phoi tie nhan say [2] Diem khlc biet Idn thiet ke may say tang sdi 11 phai lira chgn vl xac dinh dugc quan he giira chieu dai vl chieu rgng ciia ghi [1] Neu quan he giira hai kich thude khdng dung, se lam cho vat lieu say luu lai khdng gian say lau hon muc can thiet, am san pham say se giam den am can bang, lam tang chi phi tieu hao nang lugng, hoac ngugc lai, thdi gian luu ciia vat lieu qui ngan se khong dii thdi gian tholt am, ket qua 11 chat lugng say khdng dat yeu can 2.2 Thyc hien Phan mem thiet ke miy say tang soi dugc xay dung tu phan mem Visual Basic[4] LTU diem cua phan mem 11 tiet kiem thdi gian vl cdng sire hon so vdi mot so ngdn ngir lap trinh cd can tnic khlc Nd mang tinh true quan cao, cd kha nang hen ket cic thu vien lien ket dgng DLL [3] Tuan tu cic budc thuc hien kien tao nhu sau: Xay dung mgt thuat toan tim kiem vl ngi suy cic thdng sd vat ly cua tic nhan say tir mot bang cho trudc Trong ngi dung niy, ta sir dung ky thuat lien ket co sd giir lieu ADO (Active X Data object) De llm dugc viec nay, ta tuan tu giii quyet budc: Budc 1: Tao ca sd dir lieu la bang thong so vat ly cua khong kho bang chuong trinh Microsoft Access (file data.mdb) Budc 2: Khdi tao ket noi tir chuong trinh den co sd dir lieu [3][4] Budc 3: Thuat toan tim kiem vl ngi suy cac thong so vat ly cua khong khd theo nhiet x Ta lay thuat toan tim kiem vl ngi suy gia tri lam luu dien hinh (Doc gia tham khao ngi dung [12]) Sau thuc hien xong him tim kiem va ngi suy thong sd vat ly cua khong kho cung nhu xay dung dugc luu do, ta tien hinh xay dung thuat toin qui trinh say ly thuyet Thuat toin xac dinh van toe soi toi thieu, van tdc tdi han va van tdc sdi toi uu (Xem cac luu ben dudi) [12] / G i , t b , t i , W i ,W2,j o , / i ih sCT fao F^,.i|—IVI_i.,v,) do=f(to j o) Io=f(to do) i j Il-«tl l=«t, 0.333 «,-' i.175(l«,-lnr dri-Ui) ql- t„3" l ,-q 5, /^i q.,- I ( U , tpl 1-333 A q - |q.i-qi|/qj >:iic t l i n h totiij tOn t h i l 4- do W H t L, c? H\ „i=n(L„v d2=f(tj dj) j 2=f(t2 d2) > Thoiil kh6i vong l^p Xiic djnh hp so iruycn nhipt k ciia vach buong sdy I Xiic dinh so b^ dien lioli mjlt ngodi ciia lo=f(di d ) Xiic