【正文】 上海市某食品冷藏庫制冷系統(tǒng)設(shè)計 I 上海市某食品冷藏庫制冷系統(tǒng)設(shè)計 摘 要 本設(shè)計是一篇關(guān)于上海市某食品冷藏庫制冷系統(tǒng)的設(shè)計。我們的主要任務(wù)是完成冷凍站和冷間制冷系統(tǒng)的設(shè)計。在本設(shè)計中，我們通過對冷藏庫各冷間負荷的計算以及冷庫制冷系統(tǒng)方案的確定來選擇制冷壓縮機，輔助設(shè)備以及冷卻設(shè)備。在選型前，我們還對制冷系統(tǒng)方案進行了經(jīng)濟技術(shù)分析，綜合多方面考慮，決定選用雙級制冷壓縮，氨泵強制供液的方案。最后，我們還對冷庫的氣流組織，管道布置，管道保溫以及自動控制方案進行了簡單地分析與說明。 關(guān)鍵詞 ：雙級壓縮 氨泵 強制供液 制冷系統(tǒng) 中間冷卻 上海市某食品冷藏庫制冷系統(tǒng)設(shè)計 II The Design of The Refrigeration System of Frozen Food Store Abstract The graduation design is a design of the refrigeration system of the frozen food in Shanghai. The main task is to finish the system design of the refrigeration station and refrigerating room. In the design, the refrigeration pressor, the cooling equipment and the auxiliary equipment are chosen by calculating the load of every refrigeration room of the cold store and determining the program of the refrigeration . Before choosing the system equipment, we have made the economic and technical analysis for the refrigeration system. After considering every aspect, twostage pression , and using ammonia pump to supply the refrigerator are established. At last , the anization of air flow, the arrangement and the insulation of pipes, and the automatic control is analyzed and illustrated simply. Key words: twostage pression 。 using ammonia pump to supply the refrigerator 。 the refrigeration system 。 medial cooling. 上海市某食品冷藏庫制冷系統(tǒng)設(shè)計 I 目 錄 目 錄 .............................................................................................................................. I 工程概況 ..................................................................................................................1 各冷間熱工計算 ..............................................................................................2 氣象資料 ..................................................................................................................4 冷庫圍護結(jié)構(gòu)傳熱量 1Q ............................................................................................5 庫房各冷間圍護結(jié)構(gòu)傳熱量 1Q ........................................................................7 計算基礎(chǔ)資料 ................................................................................................9 各冷間貨物放熱量 2Q .................................................................................. 10 電機運行熱 當(dāng)量 4Q ................................................................................................ 11 各冷間電機運行熱當(dāng)量 4Q ............................................................................ 12 計算基礎(chǔ)資料 ................................................................................................ 12 冷卻設(shè)備負荷和機械負荷 ......................................................................................... 14 各冷間計算冷負荷 Q 匯總 .............................................................................. 14 各冷間機械負荷 Qj匯總 ................................................................................ 15 制冷系統(tǒng)方案的依據(jù)、原則及內(nèi)容 .......................................................................... 17 制冷系統(tǒng)方案的原則 ..................................................................................... 17 確定制冷系統(tǒng)方案 .................................................................................................. 17 確定制冷系統(tǒng)蒸發(fā)溫度回路 ........................................................................... 19 冷間冷卻方式的確定 ..................................................................................... 21 冷庫供冷方式的確定： .................................................................................. 22 經(jīng)濟技術(shù)分析 ......................................................................................................... 23 壓縮機的選型計算 .................................................................................................. 25 制冷壓縮機的選型 ......................................................................................... 26 冷凝器的作用 ................................................................................................ 30 冷卻設(shè)備選型計算 .................................................................................................. 31 選型計算 ....................................................................................................... 32 中間冷卻器的作用 ......................................................................................... 33 氨泵選型計算 ......................................................................................................... 35 選型計算 ....................................................................................................... 35 低壓循環(huán)貯液桶的作用 .................................................................................. 36 油分離器選型計算 .................................................................................................. 38 選型計算 ....................................................................................................... 38 高壓貯液器的作用 ......................................................................................... 39 空氣分離器選型 ...................................................................................................... 40 空氣分離器的選型 ......................................................................................... 40 集油器的作用 .............................................................................................. 40 冷卻塔的選擇 計算 ................................................................................................. 41 上海市某食品冷藏庫制冷系統(tǒng)設(shè)計 II 冷卻水池選型 ....................................................................................................... 42 緊急泄氨器選型 .................................................................................................... 42 第 5 章 冷間制冷工藝設(shè)計 ................................................................................................... 44 冷間的制冷工藝設(shè)計 ............................................................................................... 44 系統(tǒng)管