NGHIEN CLUU - TRAO OPl LY THUYET TINH TOAN VA THU'C NGHIEM THIET B\ CHU'NG CAT N U d c Sir DUNG NANG LUONG MAT TROfJ DANG SINGLE BASIN KET HOP ONG THUY TINH CHAN KHONG CACULATION THEORY AND EXPERIMENT OF A SINGLE BASIN SOLAR STILL COUPLE WITH EVACUATED GLASS TUBES Hoang Van Vilt", Le Xuan Phong', Nguyin Thanh Dung', Tran Xuan An', NguySn ThS Bao' 'Cong ty TNHH Le Phong 'Trucmg Cao ding Cong Thucmg TP H5 Chi Minh 'Vien Phat trien Nang lugng Ben virng ISED TOM TAT Ndng lugng mat tr&i Id nguon ndng lugng sgch vd CO trit lugng rdi l&n, vi vgy viec dua ca Ihiel bi vdo de khai thdc nguon ndng lu&ng ndy co y nghia l&n, ddc biel, vol nhimg quoc gig co so gia ndng vd buc xg lot nhu Viel Nam Cdc thiet bi chung cdt nu&c Iruyen thong su dung ndng lugng mat Ir&i & nu&c ta dan gidn vd sdn lugng chug cao De ndng cao sdn lugng nu&c chung cdl, nhom nghien cuu da xdy dung len thiet bi chimg cdt nu&c sit dung ndng lugng mat trai v&i dien lich 0,6 m'' (dien lich boc hcd) kel hgp ong thuy tinh chdn khong Thiel bi dugc Ihitc nghiem tro nhihig ngdy ndng Ihdng 4/2015 tgi TP Ho Chi Minh Thiet bi cho sdn lugng cao nhdt sdu l&p nu&c cdn chung cdl Id 0, OJ m (6 lit), nu nggt 0,02 m (17,5lit) Sdn lugng nu&c chung cdt dat 5,86 kg/m^ (tic 7-17h), img v&i biec xa trun binh 516 W/m' Tit khoa: Chung cdl nu&c sit dung ndng lugng mgi tr&i ABSTRACT Solar energy is clean source and endless reserves Thus, putting Ihe device in order to exploit this source of energy is of great significance, especially for countries with good sunshine and radiation like Vietnam In our country, the conventional solar stills are simple and low output To enhance the yield of distilled water, the team has built up equipment distilled water using solar energy with an area of 0,6 m- (evaporating area) couple wilh evacuated glass tubes Equipment is tested in the sunny days in april in Ho Chi Minh city Equipment has Ihe highest output when Ih brackish water depth is 0,01 m (6 liters) and thefreshwater is 0,02 m (17,5 liters), production of distilled water can reach 5,86 hters/m' (from 7am to pm) lo Ihe average radiation 516 W/m' Keywords: Solar still; Evacuated glass tubes ISSN 0866 • 7056 TAP CHl CO KHl VIET NAM, So nam 2015 www.cokhivietnam.vn NGHIEN C U T U - T R A O D O I DAT VAN DE 2.2 Cong thioc tinh toan ly thuydt chung cat BU&C Nuac la nguon nang lupng thiet yeu va thuc su can thiet cho su tdn tai ciia mdi ca th^ song tren trai dat Nguon nuac sach dang hi de dpa bai su phat trien ciia cong nghiep gay su nhiem cua ngu6n nuac Khan hi6m ngudn nuac sach de uong dang thuc su la vin de c4p thiet hien nay, nhat la nhung nguai dan dang sinh song tai cac viing sau, vung xa, bien gidi va hai dao, nhiing vimg mien thiiu nuac sach hoac nguon nuac bi nhilm Viec tao thiit bi chung cat nudc de bi8n nude phen, nuac lg, nudc man, nuac ngpt cho nguoi dan thuc su CO y nghia, nhat la nhihig qudc gia co lanh thd keo dai tren bien nhu Viet Nam Dunkle (1961) da dua mpt so cong thiic tinh toan ly thuyet ve chung cat nudc, nhu sau: Npi dung chinh bai bao, la trinh bay mgt so cong thuc tinh toan thiit bi chung cat nuac cua cac tac gia di trudc d i phuc vu tinh toan ly thuyet, nghien cuu chi tao thiit hi chung cat nuoc sii dung NLMT dang Single Basin kit hop dng thiiy tinh chSn khdng (OTTCK) va thuc hien dac thyc nghipm ciing nhu dua danh gia ve tiem nang img dyng thiet hi vao thuc te Clia TP Ho Chi Minh ndi rieng va Viet Nam noi chung - He so truyen nhiet bang doi lim tir be mat nuac tdi be mat ciia kinh phii dugc tinh theo cong thlic sau: Trong do: o Ap suat hoi rieng phan tai be mat kinh phli: ^ „ = e x p 25,317- (Nlm'-) (2) o Ap suat hoi rieng phan tai mat nuoc: = exp 25.317- (N/m') (3) o T^^: Nhiet dp be mat nudc can chung cat ("C); o T ^: Nhiet dp be mat cua kinh phu (°C) LY T H U Y E T TINH TOAN 2.1 Sor nguySn ly ho^t dpng cua thiet bi - He so truyen nhiet bang hoc hoi tir be m§t nudc tdi be mat cua kinh phii dupc tinh theo cdng thlic sau: h^.=0.0l6273xh^x^ ^ (W/m^K) (4) - He so truyen nhiet bang biic xa tir mat nudc tod be mat ciia kinh phii dugc tinh theo cong thlic sau: r(r„, +273)*-(7+273)*] Hinh I: Sa nguyen ly thiet bi ISSN 0866 - 7056 TAP CHI CO KHf VIET NAM, S6 nam 2015 www.co Ithiv.'itnam.vn , ,., NGHIEN cufu-TRAO Ddl Trong do: 1+^-1 hire xa A^: Dien tich Aperture ciia ong TTCK (A^ = N X 0,0548x1.72); ' ' = 0.9: Anh hudng cua he so N^: So dng TTCK; A^: Dien tich be mat hap thu bdn chung ck (basin liner) (m^) ,f? = O r ' ' ' ; ^ =