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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="38oqheg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/bingpu/637401016101733733/5140658.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="p3elnuw" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江蘇干冰制冷劑廠家,制冷劑</p><p><span>***更新：</span>2021-01-13 06:27:38</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="gfx7ik8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海冰仆冷暖設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>徐佳華</p><p><span>郵箱: </span>444054147@qq.com</p><p><span>電話: </span>13761656620</p><p><span>傳真: </span>1_1</p><p><span>網(wǎng)址: </span>https://www.shbpln.com</p><p><span>手機(jī): </span>1-1</p><p><span>地址: </span>美丹路222號(hào)629室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="eiacebd" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="o8d3zwd" class="box"><p><p style="text-indent:25px">在蒸汽壓縮式制冷機(jī)中，制冷劑選擇除了要有較好的熱力性質(zhì)和物理化學(xué)性質(zhì)外，更應(yīng)具有優(yōu)良的環(huán)境特性。具體要求如下：（1）對(duì)人類(lèi)生態(tài)環(huán)境無(wú)破壞作用。不破壞大氣臭氧層，不產(chǎn)生溫室效應(yīng)。（2）臨界溫度較高。在常溫或普通低溫下能夠液化。希望臨界溫度比環(huán)境溫度高的多，才能減少制冷劑節(jié)流損失，提高循環(huán)經(jīng)濟(jì)性。（3）在工作溫度范圍內(nèi)，具有適當(dāng)?shù)娘柡险羝麎毫?，較起碼蒸發(fā)壓力不得低于大氣壓力，以免外部空氣滲入系統(tǒng)中；冷凝壓力不宜過(guò)高，江蘇干冰制冷劑廠家，否則會(huì)引起壓縮機(jī)耗功增加，并要求系統(tǒng)具有較高的承壓能力，增加設(shè)備成本。在氣體壓縮式制冷機(jī)中，江蘇干冰制冷劑廠家，使用氣體制冷劑，如空氣，江蘇干冰制冷劑廠家、氫氣、氦氣等。江蘇干冰制冷劑廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇干冰制冷劑廠家,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016101733733/5140658.png"></div><p style="text-indent:25px">目前制冷劑價(jià)格上升主要有三個(gè)因素：首先是的各國(guó)將螢石提升為戰(zhàn)略性資源，對(duì)其實(shí)行了保護(hù)性開(kāi)發(fā)；其次是空調(diào)（包括汽車(chē)空調(diào)）消費(fèi)量的增加帶動(dòng)了對(duì)制冷劑的需求；較后還有資金炒火的因素。制冷劑價(jià)格上升還有一個(gè)國(guó)際因素，根據(jù)《蒙特利爾議定書(shū)》，2010年發(fā)達(dá)的各國(guó)的低端制冷劑（如R22）產(chǎn)能已基本關(guān)停，發(fā)達(dá)的各國(guó)不再使用R22作為制冷劑，但R22作為下游含氟聚合物的主要原料，其對(duì)R22的需求依然存在。由于發(fā)展中的各國(guó)對(duì)R22完全淘汰還要等到2030年，因此這對(duì)發(fā)展中的各國(guó)的制冷劑生產(chǎn)商來(lái)說(shuō)也是一個(gè)利好。目前R22的供需缺口至少維持至2013年，也意味著制冷劑的行業(yè)景氣至少還能持續(xù)兩年時(shí)間。江蘇干冰制冷劑廠家R134a對(duì)鋼、鐵、銅、鋁等金屬未發(fā)現(xiàn)有相互制冷劑化學(xué)反應(yīng)的現(xiàn)象，*對(duì)鋅有輕微的作用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇干冰制冷劑廠家,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017236108733/8552353.png"></div><p style="text-indent:25px">制冷劑的選用是一個(gè)比較復(fù)雜的技術(shù)經(jīng)濟(jì)問(wèn)題，需要考慮的因素很多，選擇時(shí)應(yīng)根據(jù)具體情況，進(jìn)行各方面的技術(shù)分析。1.考慮環(huán)保的要求。必須選用符合的各國(guó)環(huán)保法規(guī)的制冷劑。2.考慮制冷溫度的要求。根據(jù)制冷劑溫度和冷卻條件的不同，選用高溫（低壓）、中溫（中壓）、低溫（高壓）制冷劑。通常選擇的制冷劑的標(biāo)準(zhǔn)蒸發(fā)溫度要低于制冷溫度10℃。選擇制冷劑還應(yīng)考慮制冷裝置的冷卻條件、使用環(huán)境等。運(yùn)行中的冷凝壓力不應(yīng)超過(guò)壓縮機(jī)安全使用條件的規(guī)定值。汽車(chē)空調(diào)只能用車(chē)外空氣做冷卻介質(zhì)，對(duì)其產(chǎn)生影響的氣溫、風(fēng)速、太陽(yáng)輻射、熱輻射等因素?zé)o不在頻繁發(fā)生變化，其運(yùn)行條件決定它只能選用高溫（低壓）制冷劑。</p><p style="text-indent:25px">在氣體壓縮式制冷機(jī)中，使用氣體制冷劑，如空氣、氫氣、氦氣等，這些氣體在制冷循環(huán)中始終為氣態(tài)；在吸收式制冷機(jī)中，使用由吸收劑和制冷劑組成的二元溶液作為工質(zhì)，如氨和水、溴化鋰（分子式：LiBr。白色立方晶系結(jié)晶或粒狀粉末，極易溶于水）和水等；蒸汽噴射式制冷機(jī)用水作為制冷劑。制冷劑的主要技術(shù)指標(biāo)有飽和蒸氣壓強(qiáng)、比熱、粘度、導(dǎo)熱系數(shù)、表面張力等。1960年以后，人們對(duì)非共沸混合工質(zhì)的應(yīng)用進(jìn)行了大量的試驗(yàn)研究，并已將其用于天然氣的液化和分離等方面。制冷劑在蒸發(fā)器內(nèi)吸收被冷卻介質(zhì)（水或空氣等）的熱量而汽化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇干冰制冷劑廠家,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017472749367/5818643.png"></div><p style="text-indent:25px">R-134a制冷劑別名R134a、HFC134a、HFC-134a、四氟乙烷，商品名稱(chēng)有SUVA 134a、Genetron 134a、KLEA 134a等，中文名稱(chēng)四氟乙烷，英文名稱(chēng)1,1,1,2-tetrafluoroethane，化學(xué)名1,1,1,2-- 四氟乙烷，分子式CH2FCF3。由于R-134a屬于HFC類(lèi)物質(zhì)（非ODS物質(zhì)Ozone-depleting Substances）——因此完全不破壞臭氧層，是當(dāng)前世界絕大多數(shù)的各國(guó)認(rèn)可并推薦使用的環(huán)保制冷劑，也是目前主流的環(huán)保制冷劑，較廣用于新制冷空調(diào)設(shè)備上的初裝和維修過(guò)程中的再添加。R-134a作為使用較較廣的中低溫環(huán)保制冷劑，由于HFC-134a 良好的綜合性能，使其成為一種非常有效和安全的CFC-12的替代品，主要應(yīng)用于在使用 R-12（R12、氟利昂12、F-12、CFC-12、Freon 12、二氯二氟甲烷）制冷劑的多數(shù)領(lǐng)域R12是一種無(wú)色、透明、沒(méi)有氣味，幾乎無(wú)毒性、不燃燒、不，很安全的制冷劑。上海大金R410A費(fèi)用</p><p style="text-indent:25px">在吸收式制冷機(jī)中，使用由吸收劑和制冷劑組成的二元溶液作為工質(zhì)，如氨和水、溴化鋰和水等；江蘇干冰制冷劑廠家</p><p style="text-indent:25px">制冷劑需有良好的電氣絕緣性。經(jīng)濟(jì)性，要求工質(zhì)低廉，易于獲得。環(huán)保性，要求工質(zhì)的臭氧消耗潛能值（ODP）與全球變暖潛能值（GWP）盡可能小，以減小對(duì)大氣臭氧層的破壞及引起全球氣候變暖。共沸制冷劑：由兩種或兩種以上的制冷劑按一定的比例混合而成，在氣化或液化過(guò)程中，蒸汽成分與溶液成分始終保持相同；在既定壓力下，發(fā)生相變時(shí)對(duì)應(yīng)的溫度保持不變。非共沸制冷劑：由兩種或兩種以上的制冷劑按一定的比例混合而成。在定壓下氣化或液化過(guò)程中，蒸汽成分與溶液成分不斷變化，對(duì)應(yīng)的溫度也不斷變化。江蘇干冰制冷劑廠家</p><p style="text-indent:25px">上海冰仆冷暖設(shè)備有限公司主要經(jīng)營(yíng)范圍是化工，擁有一支專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。公司業(yè)務(wù)分為制冷劑廠家直銷(xiāo)，冷凍油廠家直銷(xiāo)，壓縮機(jī)批發(fā)銷(xiāo)售，制冷配件批發(fā)銷(xiāo)售等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競(jìng)爭(zhēng)力，努力學(xué)習(xí)行業(yè)知識(shí)，遵守行業(yè)規(guī)范，植根于化工行業(yè)的發(fā)展。冰仆冷暖設(shè)備秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營(yíng)理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2826235.html</p></div></div></div></div></div><div id="is2dta3" class="page-right twoColRt"><div id="ranfc8m" class="box01 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