The normal operating temperature of a biogas engine is 65-70 ° C, which is 15-20 ° C lower than that of a regular engine. Excessive engine temperature can cause the mixture to ignite, affecting the normal operation of the engine and accelerating the transformation of the engine oil, resulting in carbon deposition, easy formation of oil film cracking, poor smoothness, and increased wear. Therefore, the use of engine coolant can

沼氣發動機停止恰當降溫尤為重要，能夠保證發動機正常工作。但假如發動機的溫度太低，冷卻過度，也會產生反作用，使發動機蓋的熱量損失加大，不利于可燃混合氣體的構成和熄滅，并招致發動機油粘度變大，摩擦損失增加，形成發動機有效功率降低

It is particularly important to stop the biogas engine and cool it properly to ensure its normal operation. But if the temperature of the engine is too low and the cooling is excessive, it can also have a reaction, increasing the heat loss of the engine hood, which is not conducive to the formation and extinguishing of the combustible mixture, and causing the viscosity of the engine oil to increase, friction loss to increase, resulting in a decrease in the effective power of the engine

在實踐運用過程中，普通應用冷卻液的小循環和大循環處理沼氣發動機的冷卻光滑問題， 使發動機得到適度的冷卻，從而使其堅持在適合的溫度范圍內工作。通常關于沼氣發動機的水冷卻系統，當缸蓋冷卻水套中的冷卻液溫度到達60°左右時，大循環啟動，可確保沼氣發動機正常工作

In the process of practical application, the small cycle and systemic circulation of common coolant are used to deal with the problem of smooth cooling of biogas engine, so that the engine can be properly cooled, so that it can work within the appropriate temperature range. Generally, for the water cooling system of biogas engine, when the coolant temperature in the cylinder head cooling water jacket reaches about 60 °, the systemic circulation starts to ensure the normal operation of biogas engine

二、水介質能否能替代發動機冷卻液

2、 Can water medium replace engine coolant

在實踐運用中用戶常常疏忽發動機冷卻液的運用，而簡單的用水作為

In practical applications, users often neglect the use of engine coolant and simply use water as a solution

發電機組的冷卻介質。隨著發電機組的運轉冷卻水損耗嚴重，需求頻繁補加水分，且運用一段時間后就會結垢，招致發電機組冷卻效果降落，發動機運轉溫度升高，影響發電機組的正常發電。

The cooling medium for the generator set. With the severe loss of cooling water during the operation of the generator set, frequent replenishment of water is required, and scaling occurs after a period of use, resulting in a decrease in the cooling effect of the generator set and an increase in engine operating temperature, which affects the normal power generation of the generator set.

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