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

沼气发动机停止恰当降温尤为重要，能够保证发动机正常工作。但假如发动机的温度太低，冷却过度，也会产生反作用，使发动机盖的热量损失加大，不利于可燃混合气体的构成和熄灭，并招致发动机油粘度变大，摩擦损失增加，形成发动机有效功率降低

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

在实践运用过程中，普通应用冷却液的小循环和大循环处理沼气发动机的冷却光滑问题， 使发动机得到适度的冷却，从而使其坚持在适合的温度范围内工作。通常对于沼气发动机的水冷却系统，当缸盖冷却水套中的冷却液温度到达60°左右时，大循环启动，可确保沼气发动机正常工作

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、水介质能否能替代发动机冷却液

2、 Can water medium replace engine coolant

在实践运用中用户常常疏忽发动机冷却液的运用，而简单的用水作为

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

发电机组的冷却介质。随着发电机组的运转冷却水损耗严重，需求频繁补加水分，且运用一段时间后就会结垢，招致发电机组冷却效果降落，发动机运转温度升高，影响发电机组的正常发电。

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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