Selection of gas, oil, and coolant:

在天然气发电机组发动机使用前，应根据具体使用的环境和条件，选用适当规格的天然气、机油和冷却液。选用恰当与否，对天然气发电机组的发动机的性能和使用寿命有很大的影响.

Before using the natural gas generator set engine, appropriate specifications of natural gas, oil, and coolant should be selected based on the specific environment and conditions of use. The appropriate selection has a significant impact on the performance and service life of the natural gas generator set engine

一.天然气发电机组使用燃气的要求：

1、 Requirements for the use of gas in natural gas generator sets:

燃气发动机的燃料以天然气为主，也可以使用油田伴生气、液化石油气、沼气等可燃性气体。所用的气体应通过干燥脱水，达到无游离水、原油和轻质油，其低热值不应低于31.4mj/m3,总硫含量不大于480mg/m3,硫化氢含量不大于20mg/m3.此外天然气输送压力在0.08－0.30MAP范围内.

The fuel for gas engines is mainly natural gas, and combustible gases such as oilfield associated gas, liquefied petroleum gas, and biogas can also be used. The gas used should be dehydrated through drying to achieve no free water, crude oil, and light oil. Its low calorific value should not be less than 31.4mj/m3, total sulfur content should not exceed 480mg/m3, and hydrogen sulfide content should not exceed 20mg/m3. In addition, the natural gas delivery pressure should be within the range of 0.08-0.30MAP

二.天然气发电机组所用的机油

2、 Oil used in natural gas generator sets

机油是用来润滑天然气发动机的运动件并对这些运动件起到冷却散热、带走杂质和防止锈的作用。其品质的好坏除对燃气发动机的性能和使用寿命有影响外，对机油的使用期限有一定的影响。为此，应根据天然气发电机组燃气发动机的使用环境温度来选适当的机油。天然气发动机尽可能使用燃气发动机专用机油15W40CD或15W40CC等.

Oil is used to lubricate the moving parts of natural gas engines and plays a role in cooling and dissipating heat, removing impurities, and preventing rust. The quality not only affects the performance and service life of gas engines, but also has a certain impact on the service life of oil. Therefore, the appropriate oil should be selected based on the ambient temperature of the natural gas generator set gas engine. Natural gas engines should use gas engine specific oils such as 15W40CD or 15W40CC as much as possible

三.天然气发电机组使用冷却液：

3、 Cooling liquid used in natural gas generator sets:

用于冷却系统的直接冷却发动机的冷却液通常使用清洁的淡水，雨水或经澄清的河水为宜.当天然气发动机在低于0度的环境条件使用时，应严防冷却液冻结，致使零件冻裂。可根据温度来配用适当凝点的防冻液或在起动前加注热水，但停车后应立即放水。

The coolant used for direct cooling of engines in the cooling system usually uses clean fresh water, rainwater, or clarified river water. When using natural gas engines in environmental conditions below 0 degrees Celsius, it should be strictly prevented from freezing the coolant, which may cause parts to freeze and crack. Suitable freezing point antifreeze can be used according to the temperature or hot water can be added before starting, but water should be drained immediately after parking.

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