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class="tac"><span>来源åQ?a href='http://www.grantrivercanoerental.com/news/173.html'>http://www.grantrivercanoerental.com/news/173.html</a></span><span>发布旉™—´åQ?020-01-09</span></h3> <div class="con mt10 fs14"> <p><p style="text-indent:2em;"> åœ?a href="http://www.grantrivercanoerental.com" target="_blank">冷库</a>制冷装置中必™å»è¦æœ‰å·¥è´¨åœ¨å…¶ä¸­˜q›è¡ŒçŠ¶æ€å˜åŒ–åƈ完成热力循环˜q‡ç¨‹ã€‚冷库制冯‚£…¾|®æ‰èƒ½è¿ž¾l­ã€ç¨³å®šçš„向外界供å†øP¼Œè¯¥åó@环工质称为冷库制冷剂ã€?</p> <p style="text-indent:2em;"> 冷库制冷剂,是冷库制å†ïL³»¾lŸä¸­ä¸€ä¸ªå¿…不可ž®‘的东西åQŒä»–的重要度ž®Þq›¸å½“于äºÞZ½“中的血æ¶ÔŒ¼Œå†·åº“制冷¾pȝ»Ÿä¸­æ²¡æœ‰äº†è¡€æ¶ÔŒ¼Œé‚£ä¹ˆ˜q™ä¸ªå†·åº“制冷¾pȝ»Ÿž®×ƒ¸èƒ½å·¥ä½œã€?</p> <p style="text-indent:2em;"> 在逆卡诺åó@环中曾指出,冷库制冷¾pÀL•°çš„大ž®ä¸Žå†·åº“制冷剂性质无关åQŒä½†åœ¨ç†è®ºå’Œå®žé™…冷库制冷循环中,冷库制冷剂的物理ç‰ÒŽ€§å¯¹å†·åº“制冷循环的优劣有着重要的媄响。另外在选用冷库制冷剂时åQŒè¿˜éœ€è¦è€ƒè™‘到冷库制冷剂的化学稳定性、毒性、可燃性、ä­hæ û|¼Œä»¥åŠå¯¹ç”Ÿæ€çŽ¯å¢ƒåª„响等多种因素ã€?</p> <p style="text-indent:2em;"> 随着¿U‘学技术发展,对冷库制冯‚£…¾|®æ‰€ç”¨çš„冷库制冷剂一直在˜q›è¡Œ½{›é€‰ï¼Œå…¶ç›®çš„主要是冷库制冷装置在规定的冷库制冷温度之间内,能具有安全可靠和良好的经‹¹Žè¿è¡Œæ€§èƒ½òq¶ä¸”不会造成环境污染ã€?</p> <p style="text-indent:2em;"> 冷库制冷剂的¿Uç±» </p> <p style="text-indent:2em;"> 目前åQŒå¯ä»¥åšå†·åº“制冷的物质的¿Uç±»æœ‰å‡ åç§åQŒä½†åœ¨æ™®é€šå†·åº“制冯‚Œƒå›´å†…(-120~åQ?â„?åQŒæ‰€ç”¨çš„冷库制冷剂只有十几种åQŒè€Œåœ¨½Iø™°ƒå†·åº“制冷¾pȝ»Ÿä¸­æ‰€ç”¨çš„冷库制冷剂仅有几¿Uã€?</p> <p style="text-indent:2em;"> 1、氟利昂 </p> <p style="text-indent:2em;"> 氟利昂是饱和氢碳氢化合物的卤素衍生物。根据氟利昂化学物质的不同原子数åQŒå¯ä»¥æœ‰è®¸å¤š¿Uç±»çš„氟利昂åQŒæŒ‰ç…§è§„定的¾~–号æ–ÒŽ³•å¯ç¼–å‡ø™®¸å¤šä»£åøP¼Œä¾‹å¦‚氟利æ˜?2的代号äؓR22åQŒæ°Ÿåˆ©æ˜‚134a的代号äؓR134aã€?</p> <p style="text-indent:2em;"> ½Iø™°ƒå†·åº“制冷剂具体分¾cÖM¸Žä»äh ¼ </p> <p style="text-indent:2em;"> 氟利昂是20世纪30òq´ä»£éšç€æœ‰æœºåŒ–学工业的发展而åŞ成的有机化合物。应该承认多¿Uæ°Ÿåˆ©æ˜‚的出çŽîC‹É压羃机冷库制å†ähŠ€æœ¯å¾—åˆîCº†æžå¤§çš„改善ã€?</p> <p style="text-indent:2em;"> 2、无机化合物 </p> <p style="text-indent:2em;"> 水和氨是使用早的两种无机化合物的冷库制冷剂。目前,氨主要用在大中型冷库制冷库及制冰¾pȝ»Ÿä¸­ï¼Œè€Œæ°´ä»…用于溴化锂吸收式冷库制冯‚£…¾|®ä¸­åQŒæ°}作äؓ冷库制冷剂的代号为R717åQŒæ°´ä¸ºR718ã€?</p> <p style="text-indent:2em;"> 3、æ؜合冷库制冷剂 </p> <p style="text-indent:2em;"> 混合冷库制冷剂是ç”׃¸¤¿Uæˆ–两种以上冷库制冷剂,按一定比例æ؜合而成的一¿Uæ؜合物。它在制取某一区间低温æ—Óž¼Œèƒ½èŽ·å¾—比单一化合物更优良的åó@环运行性能ã€?</p> <p style="text-indent:2em;"> 混合冷库制冷剂分为共沸æ؜合冷库制冷剂和非共沸混合冷库制冷剂两¿Uã€?</p> <p style="text-indent:2em;"> 非共沸æ؜合冷库制冷剂åQšè¯¥å†·åº“制冷剂在一定压力下åQŒå…·æœ‰ä¸€ä¸ªå…±æ²¸ç‚¹ã€‚在一定压力下液化或气化过½E‹çš„温度不发生变化。常用的的共沸æ؜合冷库制冷剂有R502、R500½{‰ã€?</p> <p style="text-indent:2em;"> 非共沸æ؜合冷库制冷剂。这¿Uå†·åº“制冷剂在一定压力下åQŒæ²¡æœ‰å…±æ²¸ç‚¹åQŒæ¶²åŒ–或气化˜q‡ç¨‹ä¸­æ¸©åº¦å°†ç›¸åº”变化。因此,在变温热源的循环冷库制冷中,使用非共沸æ؜合制剂,能减ž®è’¸å‘器和冷凝器中的传热温差åQŒæé«˜å†·åº“制冯‚£…¾|®çš„˜qè¡Œæ€§èƒ½ã€‚非公沸混合冷库制冷剂主要有R12/R13、R22/R114½{‰ã€?</p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p></p> </div> <div class="newArtiNext mt10"><div>上一æ?<a href="174.html">‹zÖM½“ž®é¾™è™„¡š„冷库保鲜技术,在冷库能存活多久åQ?/a></div> <div>下一æ?<a 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