Gas internal combustion engines operate in a reciprocating manner, similar to car engines. The power generation efficiency (total energy conversion) of gas internal combustion engines can currently reach between 41 and 43 percent. The power of a single machine ranges from 30 kW to 2,000 kW. Of course, there are higher horsepower machines as well, but they are all medium speed machines with an RPM of less than 1500. There are brands Cummins, Carter, Jenbacher and others. Power generation by gas internal combustion engine can fully and efficiently utilize energy. The high temperature exhaust gas can produce air conditioning cold water or domestic hot water through lithium bromide or exchanger, and the high temperature cylinder liner water can also be fully utilized. The basic energy utilization rate is not less than 82%. In theAt the same time, it has good gas adaptability. Natural gas, coalbed methane, landfill gas, etc. can be used as efficient gas sources provided they meet a certain methane rating. Currently, it is widely used in distributed energy supply/CCHP projects.
The power generation efficiency (total energy conversion) of gas turbines is about 30%, and the current power ranges from hundreds of KW to tens of MW. There are brands such as Kawasaki, Solar, ABB and Siemens. Since the rpm can reach tens of thousands of revolutions, a large amount of high temperature steam can be generated, but the amount of hot water is very small. The use of waste heat is mainly in the form of waste heat boilers and lithium bromide. Likewise, the adaptability to the air source is relatively good, but the temperatureAmbient ature has a great impact on power output. Compared with gas internal combustion engines, they have the advantages of small size and high power density. However, the one-time investment and maintenance cost throughout the life cycle of the equipment is much higher than that of internal combustion units.
It is basically impossible to compare gas boilers with steam power generation and the above two types together. Regardless of the application environment or power requirements, they are not comparable choices for the same application.
In terms of technology, gas turbines are the most advanced. After all, there is no such thing as a “copied” version of the high-power turbine.
Finally, there is no more advanced, only the most applicable. The analysis should be carried out based on your actual situation, especially if your request est CCHP.