Tpp Chi Khoa Hpc Gido Due Ky Thudt (33/2015) Trudng Dpi Hpc SuPham Ky Thuat TR HS ChiMinh
THIET KE CHE TAO MO HINH BOM NlTOC Str DUNG PIN N A N G LlTONG M^T TRCH DESIGN A MODEL OF WATER PUMP USING SOLAR POWER
Mai Phudc Trai', Le Thanh PhUc' 'Tru&ng Dgi hpc Suphgm Ky thudt VTnh Long
'Tru&ng Bgi hgc Suphgm Ky thudt TP.HCM Ngiy toa soan nhin bii 22/7/2015, ngiy phin biin dinh gii 2/B/201S, ngiy chip nhin ding 03/9/2015 TOM TAT
Bdi bdo ndy trinh bdy viec thiit ki vd thi cong md hinh bam nu&c sir dung pin ndng lugng phuc VTA cho d&i sdng sdn xudt, sinh hoat cho ngu&i ddn ndng thdn & Ddng bdng sdng Cuu Long. Ngu&i sir dung van hdnh & hai che do bam Id cd hen thcri gian vd khdng cd hen th&i gian.
Tdc gid sir dung vi diiu khiin PIC18F4550-40 ciia hdng microchip de dgc dong dien ddu vdo tir cdm biin ddng ACS756-50 vd dien dp ddu vdo, dien dp ddu ra tir cdu phdn dp, dgc nhidt do cua pin tir cdm bien nhiet do LM35, dieu khien tdn so ddng m& mgch kich MOSFET cua mach cdng sudt, dieu khien ddngma cdc Relay, tinh todnhien thi dien dp, cdng sudt cita pin, nhiet do, th&i gian bom len hinh LCD. Ngodi ra mgch con co cdc tu vd IC dn dp ngudn 7812 dimg de dn dinh dien dp ngudn vd cdc tu diing de bit sut dp giup cho mgch hogt ddng dn dinh.
Ket qud thuc nghiem cho thdy md hinh hogt dpng khd dn dinh vd dgt yeu cdu de ra. Bien dp ddu vdo cua mgch tic pin ndng lugng mat tr&i thay ddi lien tuc tir 14V den 18V, dien dp ndy phuc thudc vdo cu&ng do buc xg ciia dnh ndng mat tr&i chieu xudng dien tich ciia pin nhimg dien dp ddu ra cua mgch cdp cho tdi dao dpng nhd tu 24Vden 26V. Bdng ket qud thuc nghiem cho thdy, dien dp ddu ra khdi mgch ngp cho dc qui on dinh htm so v&i dien dp cdp cho bom hogt ddng do cdng sudt cua bffm l&n hem ciia binh dc qui Dien dp tir dc qui cdp cho bam qua Relay gidm theo th&i gian bom tir 24Vden 22Vthi dimg bffm.
Tir khda: Md hinh bam nu&c, pin ndng lucmg mat tr&i, Mgch dieu khien..
ABSTRACT
The key content of this paper is about the design of water pumping model using PV solar cells to serve for production, irrigation and everyday living for rural residents in MekongDel- ta. This system can be used in dual-mode operation, with and without timer. The authors have used microcontroller PIC18F4550-40 to read the input current flow from ACS756-50 sensor, and the input, output voltage from the potentiometer, the temperature of the battery from LM35 sensor to control all Commutation frequency of the MOSFET power circuit, closing/opening of the Relay. Voltage, battery capacity, temperature, time diaphragm are calculated and displayed on the LCD. Besides, the circuits also have capacitors and IC 7812 voltage regulator which are used for stablizing the voltage source, and the other capacitors are used to compensate for voltage drops in order to make the circuit stable.
Experimental results show that the model works quite stably and effectively. The input volta- ge of solar panels is changing continuously from 14V to 18V dependent on the radiation intensi- ty of sun which shines down the PV. However, the output voltage has not changed dramatically from 24V to 26V. With the experiments, it can be seen the output voltage of the circuit which charges the battery is more stable than that of the pump since the model power is more than the battery power capacity. If the voltage from the battery which supplies to pump decreases through RELAY from 24V to 22V, it will stop working.
Keywords: Water pumping model solar batteries, controlling ch
Tgp Chi Khoa Hgc Gido Due Ky Thudt (33/2015) Tru&ng Dgi Hgc Su Phgm Ky Thugt TR Hd ChiMinh
1. GlOtI THIEU
Ciing vdi sy phat triin manh ve cdng nghiep, sy tdng trudng manh v i kinh t i keo theo nhu cdu su dung nang lugng dien d Viet Nam tang len khd nhanh. Hien nay cdc ngudn nang lugng hda thgch hien dang khai thac nhu ddu md, khi ddt, khi thien nhien, than dd, ngay cang can kidt[I]. D i tim ra ngudn nang lugng thay thd ttong tuong lai cdc nha khoa hpc se tang cudng khai thdc cac ngudn nang lugng sach, cd tiem ndng Idn vd ddi dao ttong ty nhien nhu ndng lugng mat ttdi, nang lugng gid, nang lugng nude biin, khi ddt biogas[2].
Nang lugng mat ttdi dang ngay cang phd biin vi chung cd nhieu uu diem cho phuang phap phdt dien. Nang lugng mat ttdi la nang lugng dugc tao ra tft dnh sang mat ttdi, ngudn ndng lugng nay cd the dft va gan nhu vd tan ddi vdi nhu cau cua con ngudi, khdng gdy ra d nhiem mdi trudng, an toan cho ngudi sft dung[3].
Vi tri dia ly cfta Viet Nam nam gdn dudng 2. THIET KE M O HINH
2.1 So do ket cau cua md hinh
xich dao, tinh tft vT dp 23''23'Bdc din 8''27' Bae, nen Viet Nam ndm ttong khu vye cd cudng dp bftc xa mat ttdi tuang ddi cao lam cho Viet Nam cd dugc ngudn ndng lugng mat ttdi vd cung ldn[4]. Theo cdc nha nghien cftu tten the gidi tiii sd gid ndng tiimg binh d Viet Nam ttong mdt ngay khoang 6-8gid, ndng ttong nam d phia Bdc la 1600 gid va d miin Nam la 2600 gid[6]. Cudng do buc xg mat ttdi trung binh mdi ngay ttong nam d phia bac la 3,69 kwh/m^ va phia Nam la 5,9 kwh/m- nang lugng bftc xg mat ttdi trung binh dgt 4 den 5kwh/m^ mdi ngay. Tu 2m^ dien tich dien mat ttdi tuong ftng vdi 300Wh, mdi thang thu dugc ndng lugng dien khoang 60 kwh tft dnh nang mat ttdi[5].
Su ra ddi cua viec "Thiet ki chi tao md hinh bom nirdc sir dung pin nang luvng mdt trdi".
phye vu cho ddi sdng con san xudt, sinh boat cua ngudi dan ndng thdn, nhftng noi khdng cd dien ludi qudc gia chinh la diem mdi cfta de tdi.
Hinh 1: Mo hinh hinh bam nu&c su dung pin ndng lugng mat tr&i.
iTpp Chi Khoa Hpc Gido Buc Ky Thupt (33/2015) iTrudngBpiHpc SirPhpm Ky Thuat TR Hd ChiMinh
Mo hmh dugc thidt kS voi goc xoay 50 do bing CO khi dS don anh ning ciia Mat trai vao bu6i sang va buoi chieu. Chieu dai cua mo hinh la 100cm. Chieu rong cua mo hinh 50cm. Chidu cao ciia mo hmh thay ddi t i y theo su didu chinh cua ngudi su dung, neu la 2.2 Sff do nguygn ly l a m viec ciia mo hinh.
budi sang don anh nang tir hudng ddng thi chieu cao cua mat trudc la 80cm va chieu cao cua mat sau la 100cm. Budi chiju ddn anh n i n g til h u a n g tay d mat trudc co chi§u cao la 100cm, mat sau cd chieu cao 120cm.
PIN NANG Lb'ONG MAT TRCil
MACH TANG AP BOOST (24)
MOTOR 12V/24V
i
' '
2 AC QUI 12V-5.5AH
Hinh 2: Sa do nguyen ly ham nu&c sic dung pin ndng luang mat trai
*> Md hinh hoat d$ng d hai che do bom:
Che do mgt Id bam khong hen th&i gian:
Mudn bom boat ddng d chi dp nay ngudi van hanh phai nhan nut bom (PUMP) va gift ttong thdi gian 3 gidy.
Che do hai Id bam co diu chinh th&i gian boTn theo su dieu chinh cua nguai van hdnh:
Mudn bom boat dpng d che dp nay ngudi van hanh phdi nhdn nut bom (PUMP) va khdng gift nut nhan. Ngudi van hanh se thyc hien hen thdi gian bam bang each nhdn tiip nut tdng (UP) de tang thdi gian bam hoac nut giam (DOWN) de gidm thdi gian bom, n i u khdng bam se bom ttong vdng 5 phut thi dftng lai do chuong trinh da lap trinh, mdi Idn nhdn nut tang (UP) boat giam (DOWN) tiidi gian bom la 5 phftt. Va thdi gian hen gidi tdi da la 90 phut do ngudi ldp trinh quyit dinh.
<• Cac trudng hgp hoat dgng cua mo hinh nhu- sau:
Trdi ndng mgnh cdng sudt pin ndng lupng ttdi du Idn (nghia la bom boat ddng bdng nang lugng mat ttdi dien dp Idn hon lOV) di qua
mgch tang ap, cung cap dien tryc ti6p vao ddng CO dien mdt chieu 24V, khdng ngp diSn cho ac qui.
Trdi nang yeu cdng sudt pin nang lugng nhd (nghia Id bam boat ddng bang nang lugng mat ttdi dien dp nhd hon lOV) khdng du cap dien tryc tidp vdo ddng co didn mdt chieu 24V hogt dpng. Luc nay dc qui eung cdp didn cho ddng CO hoat ddng qua Relay.
Trdi nang manh cdng sudt pin nang lugng ttdi Idn di qua mach tang dp nap dien cho dc qui 24V, khi dc qui h i t dien vd bom khdng hogt dgng.
Trdi het ndng, dien dp cua dc qui qua Re- lay cap dien cho dgng co dien mdt chieu hogt ddng neu dc qui du dien.
2.3 Tinh h^ thong pin nSng lirgng mat trfri su dung cho mo hinh [8]
Chgn tdi la mgt motor bom mdt chieu co dien ap 24V, dong dien 3.3A ed cdng sudt SOW sft dung khodng 6 gid tten ngdy. Do sd thdi gian ndng ttong ngdy d Ddng bang sdng
Tgp Chi Khoa Hgc Gido Dgc Ky Thugt (33/2015) Tru&ng Dgi Hgc SuPhgm Ky Thugt TR Hd ChiMinh
Cftu Long khodng 6 gid va dd bftc xa nang lugng mat ttdi khoang la 5 kwh/mVngdy. Tdn hao ttong he thdng pin nang lugng mat ttdi la 1.3. Chpn pin nang lugng m^t ttdi bdn tgi Ihi trudng ThMih Phd Hd Chi Minh cd thdng sd ky tiiudt: Pmax = 70Wp, Vmp = 18V, Imp - 3.89A, Voc = 21.69A, Ise = 4.24A.
• Xac dinh tdng lugng dien tieu thu moi ngay
= 80 W X 6 gid = 480 Wh/Ngay. (I)
• Tinh pin mgt ttdi (PV panel).
PV panel = 480 x 1.3 - 624 Wh/Ngay. (2) TdngWpcuaPVpanel=624/5 = 124Wp. (3) Sd PV cdn dung la 124/70 = 1.7 tdm d i dugc cdng sudt ciia pin la I40Wp. (4) Chpn hai tdm pin 70W ghep song song.
• Tinh toan dung lugng cfta ac qui dy phdng cho he thdng.
Chgn hai ac qui co dung lugng 5.5 Ah dien ap 12V ddu ndi tidp dugc 24V cdp cho Bom.
Dung lugng ac qui tten mdt ngay dy phdng.
Ah/Ngay
Dung lugng ac qui (Ah)
= 480/(0.85 X 0.6 x 24)=39.2 Ah/Ngay (5) Dung lugng dc qui trdn mgt gid du phdng.
Dung lugng dc qui (Ah)=39.2/24=1.6 (6) Tinh toan thdi gian binh ac qui cdp dien cho bom.
T= (24x5.5x0.8)/(80 )=1.3 gid (7)
2.4 Thi cdng bo mach cho m6 hinh 2.4.1 M^ch diiu khien cdng suat
Mach didu khien cdng suat bao gdm: IC dn dp ngudn 7812 dimg d i dn dinh ngudn 12V d i kich cho MOSFET IRF3205. Vi dien dp tir pin nang lugng mat ttdi thay ddi tft I4V d i n 18V vd tft dc qui la 24V, vugt qud gidi hgn cua chan kich FET cua MOSFET IRP3205 (V^.^ =
±20V). R I 4 cd tac dyng giam ddng kich cho chan FET cfta MOSFET Mgch kich MOS- FET sft dyng mach Push-Pull bdng hai Tran- sistor Tl (NPN) vd Transistor T3 (PNP) ghep lai va mgt Transistor T2 (NPN) diiu khiin.
Mach kich nay sft dung kha phd bien de kich MOSFET vi nd don gidn[7]. Ngodi ra mach cdn su dung tu di?n Cl dimg de dn dinh dien dp ngudn vao dieu khien chan kich FET cua MOSFET vd cdc Transistor. Ty C2, C3 dung de dn dinh dien dp ngudn ra 24V cfta mgch.
Cudn cam LI dftng de tich lugng dien trudng.
c d u phan dp R21 va R22 dugc ftng dyng de do dien dp ra cua mach, dien dp ndy dung de cung cap cho ddng co hogc nap dien cho dc qui. Dien ttd R2, R3 dimg de gidm ddng dieu khiin I^^j.^ d i diiu khiin Transistor T2. Dien ttd R I , R4 cd tdc dung gidm ddng chinh qua 1^2 cua Transistor T2 vd ddng diiu khien I^,^,, I cfta Transistor T l va T3[7].
—^-
+24V
—>-0 our-
^ > o
Hinh 3: Phdn mgch dieu khien cong sudt.
Tgp Chi Khoa Hgc Gido Due Ky Thudt (33/2015) Tru&ng Dgi Hgc Su Phgm Ky Thugt TRHd ChiMinh
• Nguyen ly hoat dong cua mach dieu khiin cong suat nhir sau:
Khi tin hieu dieu khien dien dp la OV tft chan PWM, lftc nay se khdng cd ddng dieu khiin Ig.^ qua Transistor T2, khi dd khdng cd ddng chuih I^.^ qua Transistor T2 lam Transistor T2 khdng dan. Khi Transistor T2 khdng dan thi Transistor Tl, T3 ddn do cd ddng dieu khien di qua Rl di qua R4 di qua
\^^, Ig.j3 ve mass (GND) luc nay cd ddng chinh I^^j I^j ve mass (GND), ddng thdi cung Id ddng di qua R14 kich cho chan FET cfta MOSFET lam MOSFET ddn va ve mass (GND), luc nay ddng tu pin nang lugng mat ttdi (hogc tu ddng ac qui khi khdng cd nang lugng mdt ttdi) di qua cudn day LI, nang lupng tft trudng dugc tich luy ttong cudn day L1. Khdng cd ddng di qua Diode D1, va tu C2 xa didn cung cdp cho tdi 24V (tai dien cd the la may bom nude 24V hoac nap dien cho ac qui neu ngudn dau vao la pin nang lugng mat ttdi)[73.
Khi cd tin hieu dieu khien dien ap 5V tft chdn PWM, luc nay se cd ddng diiu khiin Ig^ di qua dien ttd R2 vi mass (GND) di deu khien Transistor T2, khi dd cd ddng chinh Ij,^2 °^^ ^^^^ ird Rl di qua Transis- tor T2 ve mass (GND) lam cho Transistor T2 dan. fChi Transistor T2 ddn thi Transistor Tl, T3 khdng ddn Id do hien tugng dang ap, ldm khdng cd ddng kich cho chdn FET cua MOSFET ldm MOSFET khdng ddn, ddng didn cam ftng ttong cudn ddy LI di qua tai 24V va nap lgi cho tu C2. Khi ndng lugng tft trudng ttong cudn day bang khdng kit thuc mpt chu ky lam viec. Quy tiinh nay dugc lap di lap lai ttong sudt qud trinh lam viec. Tdn sd tdt (OV) va bat (5V) tai chan PWM dupe diiu khiin bdi vi xft ly[7].
2.4.2 M^ch ngu^n cho vi dilu khiln
PIN C£ I
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Hinh 4: Mgch nguon vi dieu khien.
Mach ngudn +5V cho vi dieu khien cd 2 ngudn ddu vao la tu pin mat trdi va tft binh dc qui, di dam bao mach vi dieu khien van hogt ddng khi mdt di mpt ngudn. Neu cd hai nguon cimg mdt lftc thi ngudn nao cd di?n dp cao hon se uu tien sft dung ngudn dd.
Mgch ngudn sft dung IC LM2596 vi no co uu diem Id cd ddi di6n dp ddu vao Idn hon di8n dp tdi da la 40V ddng dau ra eye dgi len den 3A. Trong de tdi ddng tieu thu cao nhdt la IA. Cudn cdm L2, Diode D7 vd ty C15 duoc chgn theo datasheet cua IC ngudn LM2596.
Tu CI6 dftng de dn dinh dien ap ngudn cho IC LM2596. Til CI5 dung di dn dinh di6n ap ngudn +5V.
2.4.3 M^ch Cam bien dong ACS756-50
Hinh 5. Cdm biin dong ACS?56-50.
Tpp Chi Khoa Hpc Giao Due Ky Thupt (33/2015) Tnrdng Dpi Hpc SuPhpm Kf Thupt TR Ho CM Mmh
Cam bien ddng ACS756-50 dugc diing de do bien se giam tii 2.5V vd OV tuong ling vdi ddng ddng tir 0 den 50 Amp, nd khdng nhimg do dong dien qua cam bidn 1 = 0 ddn I = -50 Amp. Ciu dien mpt chidu ma cdn do dong xoay chieu khi phan ap gdm R25 va R26 dd do dien ap pin mat ddng I = OA didn ap V„ =2.5V ndu VCC = 5V troi. Dien trd R30 dung dd han chd dong do qua
™ y « tSng khi ddng di?n di tii cue IP+ sang cue chan sd 3 cua cam bidn, tu C14 dimg dd dn dinh IP- fing, trong tnidng hgp trdn thi didn ap cam didn ap cho chan sd 3 cua cam bidn.
2.4.4 Mach nut nhan Reset cho vi fli^u khiin \k hiln thi LCD 16x2.
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Hinh 6: Mgch Reset cho vi dieu khien vd hien thi LCD 16x2.
Mgch dftng vi diiu khiin PICI8F4550-40 cfta hang microchip. Mgch Reset ndi vdo chdn sd (1) MCLR dimg de Reset he thdng khi xay ra Idi. Dien ttd R16 xdc lap trgng thai input khi chua nhdn, dien ttd RI5 dung de han chi ddng ddu vdo input cho vi dieu khien.
Tu C9 dimg di dap tdt sftc dien ddng ty cdm va chdng ddi phim nut nhan Reset. Mgch nut nhdn PUMP, LIP, DOWN tuang ty. Mach dgc cam biin nhiet dp LM35 dftng de do nhiSt dp moi trudng. Ty C5 dimg de dn dinh dien dp cho cam bien LM35.
Mach hiin tiii LCD sft dung Id LCD 16x2
cd nghia la cd hai hang, mdi hang cd 16 ky ty, va chftng cd 16 chan. Dftng de hien thi nhiet dp, dien dp, cdng suat vd thdi gian bom.
Cdc chdn cap ngudn la chdn VSS vd chdn K ndi mass (OV). Chan VDD va chan A ndi vdi ngudn duong 5V. Chan VO dugc ndi bien ttd R29 dftng de chinh do tuong phdn cua man hinh LCD.Cac chan dieu khien gdm cd chan RS dung di diiu khiin lya chgn thanh ghi.
Chan R/W dftng de diiu khien qua trinh dpc va ghi.Chan E la chan cho phep dang xung chdt. Cac chan tft DO den D7 Id 8 chdn diing de trao ddi dft lieu gifta thiet bi dieu khien va LCD.
3. KET QUA THV*C NGHIEM
3.1 Ket qua thuc nghidm do dien ap ddu vao tir pin va di^n ap dau ra khi bom hoat dgng.
Bdng 1: Thuc nghidm do dien dp ddu vdo tie pin vd diin dp ddu ra khi khi bam hogt dgng.
STT 1 2 3 4 5
Nhiet do 36»C 35»C 35°C 36''C 38°C
Dien ap vao(v) 16.0 16.2 16.3 16.5 17.5
Ddng^uvao(A) 2.3 5.7 2.5 3.0 3.1
Cdng suit dau vao(W) 37 93 41 50 55
Dien ap dau ra(V) 24.5 25.3 24.7 24.9 25.0
Tgp Chi Khoa Hgc Gido Due Ky Thudt (33/2015) Tru&ng Dgi Hgc SuPhgm Ky Thugt TR Hd ChiMinh
Qua bang kit qua thyc nghiem do dien dp dau vao tft pin ndng lugng mat ttdi va dien dp dau ra cung cdp cho bom hoat dpng cho thay dien ap ddu vao, ddng dien ddu vao, cdng sudt ddu vao cfta mach tang theo nhiet dp do dugc cua cam
bien nhiet do ngoai mdi tmdng va dien dp ddu ra cdp cho bom cung tdng dn dinh tft 24.5V din 25,3V ludn cao hon dien dp sft d\mg cfta bom la 24V. Bom boat ddng dn dinh khi didn dp ddu vao tft 16V din I7.5V va ddng tu 2.3A din 5.7A.
3.2 Ket qua thi^c nghiem do di^n dp dau vao tir pin va difn dp dau ra khi nap.
Bdng 2: Thuc nghiim do diin dp ddu vdo tic pin vd dien dp ddu ra khi ngp di?n cho dc qui
STT 1 2 3 4 5
Nhidt do 32»C 33°C 34»C 35»C 37°C
Dien ap vao(v)
14.5 14.7 15.1 15.6 15.8
Dong dau vao(A)
2.2 2.7 3.6 6.5 7.0
Cdng suat diu vao (W)
32 40 55 101 111
Dien ap daura(V) 25.1 25.3 25.7 26.0 26.3 Qua bang k6t qua thuc nghiem do dien dp
ddu vdo tu pin ndng lugng mat trdi va dien dp dau ra khi nap di6n cho dc qui cho thdy dien dp dau vao, ddng dien ddu vao, cdng suat dau vao cfta mgch tang theo nhiet do do dugc cfta cdm bien nhiet do ngoai mdi trudng va dien dp ddu ra ngp cho dc qui ciing tang dn dinh tft 25.5V den 26.3V. Mat khdc ta thdy ring dien ap ddu vao, ddng dien dau vdo, cdng sudt dau vao, di6n dp dau ra ttong trudng hgp nap cho dc quy dn dinh va cao hon so vdi trudng hgp cdp cho bom. Di^n ap ddu vao di nap tft 14.5V din 15.8V ddng tir 2.2 din 7.0A.
• Nhgn xet chung: Ket qua thyc nghiem cho thdy md hinh hogt dpng kha dn dinh dftng nhu co sd ly tiiuyit da dgt ra. Dien ap dau vao cfta mach thay dii nhd dao ddng tft khoang 14V din 18V luc tai hoat ddng tdt va dn dinh nhat. Dien ap ddu ra cdp cho bom vd ngp cho ac qui ludn ludn Idn hon 24V dat yeu cdu cua mach tang dp len 24V.
Khi ndng yeu hogc het ndng bom bdng dien dp cua de qui thi mgch cho dien dp ddu ra tft 24V din 22V tiii dftng bom.
4. KET LUAN
Qua viec tiiiit ki va tiii cdng thanh cdng md hinh bom nude sft dung pin nang lugng
mat ttdi, san sang hogt ddng de phye vu sinh hoat cho ngudi dan ndng thdn d Ddng bdng sdng Cftu Long. Vdi viec luu tru dien dp vao binh ac qui, md hinh cdn dugc sft dung cap dien thap sdng hogc bom nude tten cac xudng ghe tten Sdng Tien, sdng Hdu. Md hinh khdng phu thugc vdo ngudn nhiSn lieu nhu xang, dau, khi ddt, khi thien nhien, khi dua vao sit dung chac chdn se lam gidm chi phi sdn xudt, sinh hoat cua ngudi dan ndng thdn.
Ket qud thyc nghiem cho thdy di tai da ftng dung dugc vi xft ly PIC18F4550-40, di dpc tdt ca cdc tin hieu dau vdo vd kiim soat tdt cdc tinh hieu ddu ra, di§u khien mgch cdng sudt, diiu khien cdc Relay hogt ddng tdt vd dn dinh, difiu khien dien dp hogt dgng cua dc quy d chi dp ngp va xa phu hgp nhdm bao vd tudi thp hogt ddng cfta binh. Md hmh da ung dung thyc tiln bom lugng nude dft eho 3 cdt phun ty ddng cd dp cao Im, bdn kinh phun nude la 2m.
De tai la nin tdng cho cac cdng trinh ng- hien cftu ftng dung pin nang lugng mat ttdi nhu: Mach tieh trft ndng lugng dien bdng ndng lugng mat ttdi, thuyen chgy bdng pin nang lugng mat ttdi cho cac tau du lich d ddng bdng sdng Cftu Long. Mpt hudng phat triin khac la thiet ke che tao md hinh bom nude tudi rau ty ddng bang nang lugng mat ttdi.
Tap Chi Khoa Hpc Gido Buc Ky Thupt (33/2015) Truing Bpi Hpc SuPhpmKy Thuat TP.Hd Chi Minh
TAI LIEU THAM KHAO:
[1] Hoang Duong Hung, Tgp chi Khoa hpc vd Cdng nghe - Bgi hgc Bd Ndng,56: 1(36), Trang: 14-20, Nam 2010.
[2] US EPA.2000, Inventory of U.S, Greenhouse Gas Emissions and Sinks: 1990-1998, Rep.
EPA 236-R-OO-Ol. US EPA, Washington, DC, http://www.epa.gov/globalwarming [3] Hoang Duong Hiing, Nang lugngMat Trdi - Ly thuydt va LTng dung,Chuang 2,NXB
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