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首页> 外国专利> method and device for determination of the thermal resistance of polluted waermetauschelemente of waermetechnischen apparatuses, in particular kraftwerkskondensatoren.

method and device for determination of the thermal resistance of polluted waermetauschelemente of waermetechnischen apparatuses, in particular kraftwerkskondensatoren.

机译：的方法和装置，用于确定污水处理厂设备（尤其是硫酸盐处理厂）受污染的污水处理厂的热阻。

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The process consists in that two comparison tube sections (3; 4), which originate from a single condenser tube and of which one (3) is left in the corroded condition and/or the condition encrusted by mineral deposits and the other (4) is brought into the new condition by etching or other cleaning procedures, are conductively connected in series, and cooling water flows through them and they are heated from the outside in a condenser chamber in each case (1 and 2 respectively) by steam flows of equal power. The temperatures (t1, t2 and t3, t4 respectively) measured at the inlet and outlet positions of the comparison tube sections (3; 4), the measured values of the mass flow of cooling water (Mw) and the steam temperatures (tf; tb) and the heat flows (Qkf=Qkb) in the two condenser chambers (1 and 2 respectively) permit the determination of the thermal resistance (Rf) of the incrustation layer of the tube drawn for the purposes of investigation from the condenser. A device for carrying out the process exhibits two condenser chambers (1; 2) to receive the comparison tube sections (3; 4) and a degassing vessel 11, which communicates with the condenser chambers (1; 2). In a cooling water duct (15+5+16) there are provided, before and after the condenser chambers (1; 2), measurement chambers (17 and 19, 18 respectively) with thermo-elements for the measurement of the differences of the said cooling water and steam temperatures. Precision wattmeters preferably serve for the measurement of the heat flows (Qkf=Qkb). The heat flows can also be calculated from the difference in enthalpy of the mass flow of the cooling water (Mw) before and after the condenser chambers (1; 2). The measurement of the mass flow of cooling water (Mw) preferably takes place by weighing the quantity of cooling water which has flowed out in unit time.
机译：该过程包括两个比较管部分（3; 4），它们来自单个冷凝器管，其中一个（3）处于腐蚀状态和/或由矿物沉积物包裹的状态，而另一个（4）通过蚀刻或其他清洁程序将其置于新的状态，进行串联导电连接，冷却水流经它们，并在冷凝器腔中分别从外部（分别为1和2）通过相等的蒸汽流量加热它们功率。在比较管段（3; 4）的入口和出口位置测量的温度（分别为t1，t2和t3，t4），冷却水质量流量的测量值（Mw）和蒸汽温度（tf; tb）和两个冷凝器腔室（分别为1和2）中的热流（分别为Qkf = Qkb）可以确定出于冷凝器研究目的而抽出的管子结壳层的热阻（Rf）。用于执行该过程的装置具有两个冷凝器腔室（1; 2）以容纳比较管部分（3; 4）以及与该冷凝器腔室（1; 2）连通的脱气容器11。在冷却水管道（15 + 5 + 16）中，在冷凝器腔室（1; 2）之前和之后均设有带热敏元件的测量腔室（分别为17和19、18），用于测量冷凝器腔之间的差异。表示冷却水和蒸汽温度。精密功率计最好用于热流的测量（Qkf = Qkb）。还可以根据冷凝器腔室（1; 2）之前和之后的冷却水质量流量（Mw）的焓差来计算热流。冷却水的质量流量（Mw）的测量优选通过称量单位时间内流出的冷却水的量来进行。

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