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  1. 行業動態

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    冷干機工作過程的熱工分析:

    來源:杭州優聯超濾設備有限公司  日期:2017-12-18 09:29:52  點擊:2143  屬于:行業動態
    傳熱過程分析(熱工分析)是任何熱工設備設計和制作的理論依據。冷干機熱工計算的目的是根據壓縮空氣狀態(主要是進氣壓力和溫度),確定其降溫過程制冷系統所需要供給的制冷量Q、預冷器和蒸發器的負荷分配、計算冷干機排水量,同時也可借此預測排氣干球溫度t4。
    傳熱過程分析(熱工分析)是任何熱工設備設計和制作的理論依據。冷干機熱工計算的目的是根據壓縮空氣狀態(主要是進氣壓力和溫度),確定其降溫過程制冷系統所需要供給的制冷量Q、預冷器和蒸發器的負荷分配、計算冷干機排水量,同時也可借此預測排氣干球溫度t4。
    The analysis of heat transfer process (thermal analysis) is the theoretical basis for the design and manufacture of any thermal equipment. Cold and dry machine thermal calculation according to the compressed air condition (mainly inlet pressure and temperature), the cooling process of the refrigeration system to supply cooling capacity Q, pre cooler and evaporator load distribution calculation, cold and dry machine displacement, and also can be used to forecast the exhaust dry bulb temperature t4.
     
    就其實質而論,冷干機是由兩個換熱器構成的復合式換熱器,共有三種不同狀態的流體參與了換熱:
    As a matter of fact, the cold dryer is a compound heat exchanger consisting of two heat exchangers. There are three different states of fluid involved in the heat exchange.
    ①預冷器里,熱流體是溫度較高的飽和壓縮空氣,冷流體是冷卻后相對干燥的壓縮空氣,兩者水當量(定壓比熱與質量的乘積)極為接近;
    (1) in the precooler, the hot fluid is a high temperature saturated compressed air, and the cold fluid is the relatively dry compressed air after cooling. The water equivalent of the two parts is very close to the product of constant pressure and specific heat.
     
    ②蒸發器里熱流體是溫度已預先降低了的飽和壓縮空氣,冷流體是冷媒蒸汽。
    The thermal fluid in the evaporator is the saturated compressed air which has been reduced in advance by the temperature, and the cold fluid is the refrigerant steam.
     
    蒸發器由獨立的制冷系統提供冷源,而預冷器的冷源則來自通過蒸發器冷卻了的壓縮空氣,因而不具備獨立性。所以說,在整個熱交換過程中預冷器的作用是回收制冷系統產生的部分冷量,客觀上減少了整機的能量消耗。
    The evaporator provides a cold source by an independent refrigeration system, while the cold source of the precooler comes from the compressed air cooled by the evaporator, and thus does not have independence. Therefore, in the whole process of heat exchange, the function of the precooler is to recover part of the cooling capacity produced by the refrigeration system and reduce the energy consumption of the whole machine.
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