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ÎÒ¹ú±±·½µØÇø¶¬¼¾ÑϺ®£¬³ÇÊÐÖжà²ÉÓü¯Öй©ÈÈÏòÓû§¹©Å¯¡£ It is very cold in the winter in northern china. District heating system is adopted in city for urban users. ½üÈýÊ®Ä꣬ÎÞÂÛÊÇÔÚ¹©ÈȹæÄ£»¹Êǹ©Èȼ¼Êõ·½Ã棬¼¯Öй©ÈÈÊÂÒµÓкܴóµÄ·¢Õ¹¡£ In in recent thirty years, district heating system has developed greatly in both scale and technology. Ëæ×ŹúÃñ¾¼ÃµÄ¿ìËÙ·¢Õ¹£¬½ÚÄܹ¤×÷ÈÕÒæÊܵ½ÖØÊÓ¡£ With the rapid development of national economy, more and more attention has been paid to the energy conservation work. ºÜ¶àÑо¿ÕßÔÚ¼¯Öй©ÈȽÚÄÜ·½Ãæ×öÁ˺ܶàµÄ¹¤×÷ºÍŬÁ¦£¬Ìá³öÁË·Ö²¼Ê½¹©ÈÈϵͳ¡£ Many researchers have made a lot of efforts to energy-saving in district heating and proposed distributed heating system. ·Ö²¼Ê½¹©ÈÈϵͳ½«´«Í³µÄ¹©ÈÈϵͳµÄµ¥Ò»¶¯Á¦Ò»·ÖΪÈý£¬ In the distributed heating system,the single dynamic of the traditional heating system is divided into three places . ÕâÖÖ½«¶¯Á¦·ÖÉ¢ºóµÄ¹©ÈÈϵͳÄܹ»²¿·Ö¼õÉÙÉõÖÁÈ«²¿Ïû³ýÔÚµ÷½Ú·§ÉϵÄÄܺģ¬ ´ïµ½½ÚÔ¼ÄÜÔ´µÄÄ¿µÄ¡£ The power-distributed heating system can partly reduce or even completely eliminate the energy consumption of control valves to save energy resources. ±¾ÂÛÎÄÔÚ¶Ô´«Í³µÄ¹©ÈȹÜÍøÄܺķÖÎöµÄ»ù´¡ÉÏ£¬¶Ô·Ö²¼Ê½¹©ÈÈϵͳ½øÐÐÁË·ÖÎö¼°Ñо¿¡£ On the basis of analyzing the energy consumption of traditional heating pipe network,distributed heating system is analysed and studied in this paper. ±¾¿ÎÌâÖ÷ÒªÊǶԱäËٱõ͝Á¦·Ö²¼Ê½¹©ÈÈϵͳ¡ª¡ª·Ö²¼Ê½±äƵ¹©ÈÈϵͳµÄÑо¿¡£ This thesis focuses on dynamic distributed district heating system for variable speed pumps--distributed variable frequency pump heating system. ¶Ô°¸ÀýÖеĵäÐÍ֦״¹ÜÍø½øÐзÖÎö¡¢¼ÆËã¡£ The typical branched network in cases is analyzed and calculated. ´Ó¹ÜÍøµÄÎȶ¨ÐÔ¡¢µ÷½ÚÐԺͽÚÄÜЧ¹ûÈý·½Ãæ¶Ô¶¯Á¦·Ö²¼Ê½ÏµÍ³½øÐÐÌÖÂÛ¡£ Distributed heating system is discussed from the three aspects:adjustability ,stability and energy-saving effect of pipe networks. ×îºó¶Ô´«Í³¹©ÈÈϵͳºÍ·Ö²¼Ê½ÏµÍ³µÄ³õͶ×ÊÇé¿ö½øÐÐÁ˾¼ÃÐÔ·ÖÎö¡£ Finally,the economy analysis is made on the initial investment of traditional heating system and distributed heating system. ¾ÍÎÒ¹úĿǰ¹úÇéÀ´¿´£¬ÎÒ¹ú½ÚÄܹ¤×÷ÈÎÖØµÀÔ¶¡£ Judging from the actual conditions of present china,China still shoulder heavy responsibilities on energy conservation work. Òò´Ë£¬¼ÓÇ¿¶Ô·Ö²¼Ê½¹©ÈÈϵͳµÄÑо¿ÓÐÖúÓÚÎÒ¹ú¼¯Öй©ÈÈÊÂÒµµÄ·¢Õ¹¡£ Therefore,the research on distributed heating system is helpful to the development of district heating system in our country. ±¾¿ÎÌâÒâÔÚÕÒµ½ÊʺÏÓÚ¹¤³Ìʵ¼ÊµÄ·½·¨£¬ÒÔ±ã¶Ô·Ö²¼Ê½ÏµÍ³µÄÉè¼Æ¡¢ÔËÐС¢¹ÜÀí¹¤×÷¸ø³öÖØÒªµÄÖ¸µ¼Òâ¼û Our aim is to find a method suitable for practical engineering,so that guidance on design,operation and management of distributed heating system can be suggested. |
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