For low concentration gas generator sets, only 30-35% of the energy generated by gas is converted into electrical energy, about 30-35% is discharged with high-temperature exhaust gas, about 20-25% is taken away by the engine's own cooling system, and about 10% is lost due to factors such as body heat dissipation and resistance. The waste heat utilization of gas generator units refers to the recovery of high-temperature exhaust gas and heat carried away by the cooling system through specialized equipment, and then transported to workshops or residential areas that require heat sources. For example, the 500KW low concentration gas generator set widely used in China can generate high-temperature exhaust gas heat that can be recycled by a heat pipe air preheater to provide heating air to enterprise workshops, or to supply hot air to coal mine air shaft tunnels in winter to prevent freezing of the well; If heating is provided to offices, residential areas, or bathrooms, a heat pipe heat exchanger (heat pipe economizer) can be installed. Each heat exchanger can generate nearly 4 tons/hour of hot water above 90 ℃, solving the problem of heating a building area of over 4000m2 or bathing in medium-sized bathrooms.

低浓度瓦斯发电机组产生的尾气只要成分是CO2，温度在550℃左右，通常情况下，每台机组（500KW）产生的烟气流量在2130Nm3/h以上。随着瓦斯资源的深度开发，充分利用能源，合理利用瓦斯发电机组尾气余热是大势所趋。

The exhaust gas generated by low concentration gas generator units, as long as the component is CO2 and the temperature is around 550 ℃, usually the flue gas flow rate generated by each unit (500KW) is above 2130Nm3/h. With the deep development of gas resources, it is an inevitable trend to fully utilize energy and reasonably utilize the exhaust heat of gas power generation units.

在低浓度瓦斯发电机组排气系统安装热管余热回收装置，即热管空预器（热风利用）或热管换热器（热水利用）或热管蒸发器（低压饱和蒸汽利用），通过热动力循环设备（即大功率风机或热水利用管道循环泵或蒸汽管道）将低温交换介质（空气或者软化水）送到余热回收装置，经加热的低温交换介质变成热源直接或者再次交换后输送给终端客户使用。

Install a heat pipe waste heat recovery device in the exhaust system of a low concentration gas generator unit, which is a heat pipe air preheater (for hot air utilization), a heat pipe heat exchanger (for hot water utilization), or a heat pipe evaporator (for low-pressure saturated steam utilization). The low-temperature exchange medium (air or softened water) is sent to the waste heat recovery device through thermal power circulation equipment (such as high-power fans or hot water utilization pipeline circulation pumps or steam pipelines), The heated low-temperature exchange medium becomes a heat source and is directly or again exchanged before being transmitted to the end customer for use.

余热回收的方式根据各个企业所需要的热源不同有空气置换余热、软化水置换余热产生热水以及软化水置换余热产生蒸汽三种。余热回收后的主要用途有以下几种：

The methods of waste heat recovery vary depending on the heat source required by each enterprise, including air replacement for waste heat, softened water replacement for waste heat to generate hot water, and softened water replacement for waste heat to generate steam. The main uses of waste heat recovery include the following:

（1）煤矿巷道暖井（风井供热风）：在北方的冬季，煤矿风井巷道都需要热风炉暖井。把低浓度瓦斯发电机组产生的高温尾气经过热管空预器，将冷空气加热，可以得到高温热风通过烟道与风井处得热管空预器再次换热后的热空气送入风井，从而降低井下热风炉的热量输出，节约电能。

(1) Coal mine roadway warming up (air shaft heating air): In winter in the north, coal mine air shaft tunnels require a hot air stove to warm up the shaft. By passing the high-temperature exhaust gas generated by the low concentration gas generator unit through the heat pipe air preheater, the cold air is heated to obtain high-temperature hot air. The hot air is then reheated through the flue and the heat pipe air preheater at the air shaft, and then sent to the air shaft, thereby reducing the heat output of the underground hot air furnace and saving electricity.

（2）烘干、采暖和洗浴用热源：

(2) Heat sources for drying, heating, and bathing:

企业生产工艺中的烘干、采暖和洗浴常年需要热源。在发电机组烟道出口加装一台热管换热器（热管省煤器），通过热水循环泵几个低温水送到热管换热器，经过热交换的软化水为热源（90℃以上）供给企业生产使用，冷却后的软化水在返回热管换热器，如此往复循环。

Drying, heating, and bathing in the production process of enterprises require heat sources throughout the year. Install a heat pipe heat exchanger (heat pipe economizer) at the outlet of the flue of the generator set, and send several low-temperature water to the heat pipe heat exchanger through a hot water circulation pump. The softened water after heat exchange serves as a heat source (above 90 ℃) for production and use by the enterprise. The cooled softened water returns to the heat pipe heat exchanger and circulates back and forth.

（3）余热制冷：目前广泛采用溴化锂吸收式制冷。用热管蒸发器吸收低浓度瓦斯发电机组余热回收的热量。

(3) Waste heat refrigeration: Currently, lithium bromide absorption refrigeration is widely used. Use a heat pipe evaporator to absorb the heat recovered from the waste heat of a low concentration gas generator set.

有了燃气发电机组上面的小总结，希望对广大客户有所帮助，如果有什么不理解的或者寻求帮助的请点击我们的网站：http://www.huannengpower.com或者来电咨询，我们会尽全力为您解决

With the summary on the gas generator set, I hope it can be helpful to our customers. If you have any questions or need help, please click on our website: http://www.huannengpower.com Or call for consultation, and we will do our best to solve it for you