·¢²¼Ê±¼ä : ÐÇÆÚÈý ÎÄÕ¡¶ÈÈÁ¦·¢µç³§¡·Ï°Ìâ½â´ð¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁ8016554a2e3f5727a5e96223
Qtp(h)=
Qh?b?p=
D0(hb?hfw)157730(3023.7?334.9)=
?b?p0.855 =479.40?106(KJ/h) ·¢µç·½ÃæµÄÈȺÄÁ¿
Qtp(e)=Qtp-Qte(h)= 549.22?106-479.40?106=69.82?106(KJ/h) (1)´ËÈȵ糧µÄ±ê׼úºÄÁ¿ Btp?sQtpQl=549.22?106/29270=18.76(t/h)
(2) a. ·¢µç·½ÃæµÄÈȾ¼ÃÖ¸±ê ·¢µçÈÈЧÂÊ£º?tp(e)?3600Pel3600?12000=0.6187 669.82?10Qtp(e)3600 ·¢µç·½ÃæÈȺÄÂÊqtp(e)??tp(e)=3600/0.6187=5818.33(kj/kw.h)
·¢µç·½Ãæ±ê׼úºÄÂÊ btp(e)s?Btp(e)Pels?0.123?tp(e)=0.123/0.6187=0.119(kg/ke.h)
b. ¹©ÈÈ·½ÃæµÄÈȾ¼ÃÖ¸±ê
¹©ÈÈÈÈЧÂÊ: ?tp(h)??b?p?hs=0.885 ¹©Èȱê׼úºÄÂÊbtp(h)?(3)Èȵ糧µÄȼÁÏÀûÓÃϵÊý
sBtp(h)Ql106=34.16/0.885=39.96(kg/Gj)
29270?tp(h)3600Pel?Qh3600?12000?479.40?106?0.855 ?tp?==0.825 6549.22?10BtpQl(1) ÈÈ»¯·¢µçÂÊ??17.
Wh3600?12000==0.102 Qht157730?(3023.7?334.9)ÉÏÌâÖÐÈô»ØË®ÂÊÖ»ÓÐ60%£¬¶ø²¹³äË®µÄζÈΪ20¡æ¡£Èô¸øË®ìÊΪ»ØË®ºÍ²¹Ë®µÄ»ìºÏìÊ£¬ÊÔÇóÈȵ糧
¹©ÈȵÄÈȺÄÁ¿¼°È«³§ÃººÄÁ¿¡£
½â 20¡æʱ²¹³äË®µÄìÊֵΪ hma=84.4kj/kg
Ôò¸øË®µÄìÊֵΪ hfw=?hb?(1??)hma=0.6?334.9+0.4?84.4=234.7(kj/kg) Ôò¹©ÈÈÈȺÄÁ¿Îª
Qtp(h)=
Qh?b?p=
D0(hb??hhs)?b?p
=
157730(3023.7?0.6?334.9)=520.74?106(kj/h)
0.855
Èȵ糧×ܵÄÈȺÄÁ¿Qtp=
Q0?b?p=
D0(h0?hfw)?B?P
=
157730?(3312?234.7)
0.855 =567.7?106(KJ/h) ÔòÈ«³§µÄ±ê׼úºÄÁ¿ Btp?sQtpQl=567.7?106/29270=19.39(t/h)
?mg=0.95£¬18. ÈôB6-35/5Ðͱ³Ñ¹»úµÄp0=3.43Mpa¡¢t0=435¡æ£¬ph=0.419Mpa¡¢D0=60t/h£¬ Éè ?b?p=0.88¡¢
»ØË®ÂÊΪ100%£¬±»Ñ¹ÆûÂÖ»úµÄ¸øË®ìʵÈÓÚÓû§µÄ·µ»ØË®ìÊ376.8kj/kg£¬ÊÔÇ󣺵±ÆûÂÖ»úµÄÏà¶ÔÄÚЧÂÊÓÉ0.75±ä»¯µ½0.64ʱ¸Ãµç³§È¼ÁÏÀûÓÃϵÊýµÄ±ä»¯£¬²¢ËµÃ÷±ä»¯µÄÔÒò¡£
½â ¸ù¾Ý»ú×é²ÎÊý¿É²éìÊìØͼµÃ h0=3310kj/kg hh=2780kj/kg
Èȵ糧×ܵÄÈȺÄÁ¿
D0(h0?hfw)60?103?(3310?376.8) Qtp===
0.88?b?P?b?pQ0 =2.0?108 (KJ/h) ÆûÂÖ»úµÄÀíÏëÑ»·ÈÈЧÂÊ
?t?h0?hh3310?2780=0.18067 ?h0?hfw3310?376.8 µ±Ïà¶ÔÄÚЧÂÊ?ri=0.75ʱ,Ôò»ú×éµÄÈÈËðºÄΪ
?Qmg1?Qcp?mg?Qtp?bp?i(1??mg)?Qcp?tp?t?ri(1??mg)?
= 2?108?0.88?0.18067?0.75? (1-0.95) =1.1924?106kj/h
µ±Ïà¶ÔÄÚЧÂÊ?ri=0.64ʱ,Ôò»ú×éµÄÈÈËðºÄΪ
?Qmg2?Qcp?mg?Qtp?bp?i(1??mg)?Qtp?bp?t?ri(1??mg)
= 2?108 ?0.88?0.18067?0.64? (1-0.95) =1.0175?106kj/h ¹ø¯ºÍ¹ÜµÀÈÈËðʧΪ
?Qbp?Qtp(1??bp)= 2?108 ?(1-0.88)=24?106 (kj/h) µç³§µÄȼÁÏÀûÓÃϵÊý
?tp13600W1?Qh1Qtp??Qmg1??Qbp ??QtpQtp2?108?24?106?1.1924?106 ==0.8740 82?10 ?tp23600W2?Qh2Qtp??Qmg2??Qbp ??QtpQtp2?108?24?106?1.0175?106 ==0.8749 82?10 ÓɼÆËã¿É¼û,¸Ãµç³§È¼ÁÏÀûÓÃϵÊýµÄ±ä»¯Ö÷ÒªÊÇÓÉÓÚ»úеËðʧºÍ·¢µçËðʧµÄ¸Ä±ä.
19 . ijÈȵ糧װÓÐC12-35/10ÐÍÒ»´Îµ÷½Ú³éÆûʽÆûÂÖ»ú£¬ÆäÓйزÎÊýΪ£ºp0=3.43Mpa¡¢t0=435¡æ¡¢p1=0.98Mpa¡¢pc=0.0036Mpa ¡¢hc=2030.4kj/kg¡¢h1=2332kj/kg ¡¢hwc=116.89kj/kg ¡¢ ?b?p=0.88¡¢?mg=0.95¡¢?hs=1¡¢hhs=334.94kj/kg ¼Ù¶¨¸øË®ìÊΪÄý½áË®ºÍ»ØË®¹©ÈȵĻìºÏìÊ¡£Èç¹ûÈÈÓû§ÐèÒª´Ó¸ÃÈȵ糧»ñµÃ62802?103kj/hµÄ¹©ÈÈÁ¿£¬¶ÔÍ⹩ÆûµÄÄý½áˮȫ²¿·µ»Ø¡£ÊÔÇó¸ÃÆûÂÖ»ú½øÈëÄýÆûÆ÷µÄÄýÆûÁ¿£¬È¼ÁÏÀûÓÃϵÊý¼°ÈÈ»¯·¢µçÂÊ¡£ ½â ÓÉÆûÂÖ»ú²ÎÊý²éìÊìØͼµÃ h0=3312kj/kg ¹©ÈÈ·½ÃæµÄÈȺÄÁ¿Îª
Qtp(h)=
Q?b??hsp62802?103?71366
0.88 Ôò Dh?Qtp(h)?b?ph1?hhs62802?103=71336?103(kg/h) ?2332?334.94 ÓÉ»ú×éµÄÈÈƽºâ¿ÉµÃ D0(h0-h1)+(D0-Dh)(h1-hc)= =
3600Pel?mg
D0(h0-hc)=Dh(h1-hc)+
3600Pel?mg D0?Dh(h1?hc)3600Pel ?h0?hc(h0?hc)?m?g31.45(2332?2030.4)3600?12000?10?3 = ?3312?2030.4(3312?2030.4)0.95 =35.48+7.4=42.88(t/h)
¹Ê Dc=D0-Dh=42.88-31.45=11.43(t/h) »ìºÏË®ìÊֵΪ hfw?Dchwc?Dhhs11.43?116.89?31.45?334.94??276.82kj/kg
D042.88 Èȵ糧×ܵÄÈȺÄÁ¿
D0(h0?hfw)42.88?103?(3312?276.82) Qtp===
0.88?B?P?b?pQ0 =147.9?106 (KJ/h) Èȵ糧µÄȼÁÏÀûÓÃϵÊý
3600Pel?Qh3600?12000?62.802?106 ?tp?==0.717
147.9?106Qtp ÈÈ»¯·¢µçÁ¿Wh?Dh(h0?h1)?mg?1033600
Dh(h1?hhs1)?103 ÈÈ»¯¹©ÈÈÁ¿Qh?
3600 ¹ÊÈÈ»¯·¢µçÂÊ??Wh(h0?h1)?mg(3312?2332)0.93=0.466 ??Qhh1?hhs2332?334.9420. ijÈȵ糧װÓÐһ̨C50-90/1.2ÐÍÆûÂÖ»ú£¬ÈôÄýÆûÁ¿×îСΪ17t/hÈÔÐè·¢³ö¶î¶¨¹¦ÂÊPel=5000kWʱ£¬
ËüµÄ×î´ó³éÆûÁ¿ÊǶàÉÙ£¿ÒÑÖªÆûÂÖ»úµÄp0=8.82Mpa£¬t0=535¡æ£¬h1=2682.5kj/kg £¬hc=2298.97kj/kg£¬ ?mg=0.95¡£ ½â ¸ù¾Ý»ú×é²ÎÊýÓÉìÊìØͼ²éµÃ h0=3485kj/kg ÆûÂÖ»ú¶î¶¨¹¦ÂÊΪPe=50000kwÓɹ¦ÂÊ·½³ÌµÃ [Dc(h0-hc)+Dh(h0-hh)]?mg=3600Pe Dh(h0-hh)=3600Pe/?mg-Dc(h0-hc)
Dh(3485-2682.5)=3600?50000/0.95-17?103(3485-2298.97)
Dh=210.98(t/h)
¹ÊÆä×î´ó³éÆûÁ¿Îª210.98(t/h)
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