He thong lam mat 2

Bi 26 H THNG LM MT Mc tiờu bi hc: Sau hc xong bi ny hc sinh cú th: 1.Bit c nhim v, cu to v nguyờn lớ lm vic ca h thng lm mỏt 2.c c s h thng lm mỏt bng nc tun hon cng bc Bi 26 H THNG LM MT I NHIM V V PHN LOI Nhim v Phõn loi II H THNG LM MT BNG NC Cu to Chc nng cỏc b phn Nguyờn lý lm vic III H THNG LM MT BNG KHễNG KH Cu to Nguyờn lý lm vic 26 H THNG LM MT I NHIM V V PHN LOI Bi Nhim v: Gi cho nhit ca cỏc chi tit khụng vt quỏ gii hn cho phộp Go to the 2nd slide Bi 26 H THNG LM MT I NHIM V V PHN LOI Phõn loi : H THNG LM MT Cn c vo cht lm mỏt H THNG LM MT BNG KHễNG KH HTLM BNG NC KIU BC HI H THNG LM MT BNG NC HTLM BNG NC KIU I LU Cn c vo cỏc cỏch lm mỏt HTLM BNG NC KIU TUN HON CNG BC Go to the 2nd slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC (5) Cu to: (c) (4) (a) (2) (3) (6) (b) (1)) Pu li, đai truyền Bơm nớc (a) ng nc t C Quạt gió Kột nc (b) ng nc n bm Van Puhằng li nhiệt Bm Đờng áoQut nớc (c) ng Kột nc raVanHN kột Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Cu to: Van hng nhit Qut giú Kột lm mỏt nc Bm nc o nc lm mỏt Vũng tun hon nh Vũng tun hon ln S h thng lm mỏt bng nc kiu tun hon cng bc nd Go to the slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: Puli v truyn(1) Truyn chuyn ng t trc khuu cho bm nc v qut giú Go to the 5th slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: + Bm nc(2) To s tun hon ca nc h thng Go to the 5th slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: + Qut giú(3) To lung giú qua kột nc lm tng tc lm mỏt Go to the 5th slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: + Kột nc (4) Gm -: Bỡnh cha trờn - Bỡnh cha di - Gin ng (bng ng) ni bỡnh Gin ng lm tng din tớch tip xỳc vi khụng khớ, tng kh nng trao i nhit lm nc mỏt nhanh Go to the 5th slide Bi 26 H THNG LM MT Van hng nhit Hp xp: Bng ng, cú cha Etylic ng nc núng ng c(a) Hp xp n kột lm mỏt (C) Van Van (b)V bm nc Van hng nhit nhit ca nc thp Bi 26 H THNG LM MT Hp xp: Bng ng, cú cha Etylic ng nc núng ng c (a) Hp xp n kột lm mỏt (c) Van Van (b)V bm nc Van hng nhit nhit ca nc thp Bi 26 H THNG LM MT Hp xp: Bng ng, cú cha Etylic ng nc núng ng c(a) Hp xp n kột lm mỏt (C) Van Van V bm nc (b) Van hng nhit nhit ca nc thp Bi 26 H THNG LM MT Hp xp: Bng ng, cú cha Etylic ng nc núng ng c (a) Hp xp n kột lm mỏt (C) Van Van V bm nc (b) Van hng nhit nhit ca nc cao Bi 26 H THNG LM MT Hp xp: Bng ng, cú cha Etylic ng nc núng ng c (a) n kột lm mỏt (C) Van Van V bm nc(b) Hp xp Van hng nhit nhit ca nc cao Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: Van hng nhit (4) T ng úng m cỏc ng ng dn nc nhit ca nc thay i Go to the 5th slide 26 H THNG LM MT Nguyờn lớ lm vic: a Khi nhit nc ỏo nc cũn thp hn gii hn định tr(a) ớc: (c) Bi - Van hng nhit úng hon ton ng n kột, m hon ton ng tt n bm Nc c lu (b) hon nh Nhit nc thụng vũng tun tng nhanh, rỳt ngn thi gian hõm núng ng c H thng lm mỏt bng nc tun hon cng bc 26 H THNG LM Bi MT Nguyờn lớ lm vic: b Khi nhit nc ỏo nc gii hn cho phộp: (a) (c) Van hng nhit m c hai ng (khụng hon ton) Nc c lu thụng c hai vũng tun hon - (b) H thng lm mỏt bng nc tun hon cng bc 26 H THNG LM Bi NguyờnMT lớ lm vic: c Khi nhit nc ỏo nc vt quỏ gii (a) hn nh trc:(c) - Van hng nhit úng hon ton ng tt n bm, m hon ton ng(b) n kột Nc lu thụng vũng tun hon ln Nc núng qua kột c lm mỏt ri c bm a i lm mỏt ng c H thng lm mỏt bng nc tun hon cng bc Bi 26 H THNG LM MT Nguyờn lớ lm vic: (c) (a) (b) H thng lm mỏt bng nc tun hon cng bc 26 H THNG LM MT III H THNG LM MT BNG KHễNG KH Cu to: Bi Cỏnh tn nhit Qut giú Cỏnh Cỏnh tn tn nhit nhit Qut giú Bi 26 H THNG LM MT III H THNG LM MT BNG KHễNG KH Cu to: Qut giú V bc Cỏnh tn nhit Ca thoỏt giú Tm hng giú H thng lm mỏt bng khụng khớ s Godng to the 2nd slide 26 H THNG LM MT III H THNG LM MT BNG KHễNG KH lớ lm vic: Nguyờn Bi - Khi ng c lm vic, nhit t cỏc chi tit bao quanh bung chỏy c truyn ti cỏc cỏnh tn nhit ri tn khụng khớ Nh cỏc cỏnh tn nhit cú din tớch tip xỳc vi khụng khớ ln nờn tc lm mỏt c tng cao - H thng cú s dng qut giú lm tng tc lm mỏt v m bo lm mỏt ng u hn Bi 26 H THNG LM MT Khụng nờn ym xekhi cústỏc dng l bn Cúthỏo nờn thỏoVỡ ym xe mỏy dngchy khụng?Ti ?giú s c trung hng giú, xe lung i qua ng c nờn ng c c lm mỏt tt hn Go to the 2nd slide Bi 26 H THNG LM MT Cú hc sinh núi: Khi ng c lm vic nhit ca nú cng mỏt cng tt. Cõu núi ú ỳng hay sai ? Ti sao? Sai Vỡ ng c lm vic bỡnh thng cỏc chi tit mỏy ch nhit cho phộp: - Khi nhit cỏc chi tit quỏ mỏt (thp hn gii hn cho phộp) thỡ nhiờn liu khú bay hi, chỏy khụng kit, d kt mui, tng tiờu hao nhiờn liu, hiu sut ng c gim, cụng sut gim Go to the 2nd slide ... cỏch lm mỏt HTLM BNG NC KIU TUN HON CNG BC Go to the 2nd slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC (5) Cu to: (c) (4) (a) (2) (3) (6) (b) (1)) Pu li, đai truyền Bơm nớc... nd Go to the slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: Puli v truyn(1) Truyn chuyn ng t trc khuu cho bm nc v qut giú Go to the 5th slide Bi 26 H THNG... nc (2) To s tun hon ca nc h thng Go to the 5th slide Bi 26 H THNG LM MT II H THNG LM MT BNG NC KIU TUN HON CNG BC Chc nng cỏc b phn: + Qut giú(3) To lung giú qua kột nc lm tng tc lm mỏt Go to the