One of the world ’s three major heavy-duty gas turbine giants, the first H-class gas turbine of the German Siemens Company to enter the Chinese mainland market has recently ignited for the first time. “First ignition” refers to the process of starting and loading the gas turbine to full-speed operation, and is a key test of the gas system and control system. Reaching this node marks the successful completion of the installation and commissioning work in the previous months, and a step closer to the goal of commissioning the unit.

The above-mentioned unit is the No. 1 SGT5-8000H heavy-duty gas turbine provided by Siemens Energy for the Guangzhou Zengcheng Gas Cooling and Heating Power Cogeneration Project, a subsidiary of the large-scale power generation central enterprise Huadian Group. In April 2018, Siemens announced that it had won the first H-class gas turbine order in Mainland China and will provide Huadian Fuxin with two generator sets, including two SGT5-8000H heavy-duty gas turbines, two steam turbines and four generators. This is not only China’s largest gas-steam combined cycle project, but also the first dual H-class gas turbine project. Unit 2 has also entered the installation stage.

In May 2019, Siemens decided to divest its energy business and divide its oil and gas, conventional power generation, transmission and related services businesses, as well as its wind power company Siemens Gamesa ’s 59% of the equity is packaged for spin-off and listing. On May 1, 2020, Siemens Energy began to operate independently in China.

Gas turbine is essentially a kind of machine that produces gas through combustion of fuel (mainly natural gas) and air to drive blades to do work. Heavy-duty gas turbine is the largest force in the gas turbine family Members, its brothers also include aeroengines, aeroderivative gas turbines, marine gas turbines, various micro gas turbines, etc. According to the difference in turbine inlet gas temperature, the mainstream models of heavy-duty gas turbines can be divided into E-class, F-class and H-class.

Among them, H-class gas turbines are currently the world ’s highest combustion temperature, the largest single power and the most efficient gas turbines, and are also players of GE, Siemens and other established market players competing for Chinese gas The main product of the power generation market. Prior to the Zengcheng project, Siemens received an order for an H-class gas turbine from Hong Kong Qingshan Power Generation Co., Ltd. (CAPCO) in early 2017.


SGT5-8000H data map

The official data states that Siemens SGT5-8000H Type gas turbine will increase the combined cycle power generation net efficiency to more than 62%. In contrast, the net operating efficiency of the world’s most advanced million-kilowatt ultra-supercritical coal-fired generating units currently does not exceed 47%. The power output of a SGT5-8000H gas turbine is about the sum of the turbocharged engine power of 1380 Porsche 911 cars, and its weight is equivalent to a refilled empty shell A380 aircraft. Using a combined cycle unit of this type can meet the household electricity demand of a city with a population of 3 million.

Compared with traditional thermal power units, another advantage of gas turbines is the high start and stop flexibility. Siemens claims that its H-class gas turbine can run from standstill to full load within half an hour, and is widely used in combined heat and power plants.

The Zengcheng project is a key project in the “13th Five-Year Plan” of Guangdong Province. After commissioning, it will become an important energy support point for the Guangdong-Hong Kong-Macao Greater Bay Area and Guangzhou. The so-called triple supply refers to the production of electricity, industrial steam, cold sources, hot water and other products through the import of natural gas to “eat dry and squeeze the energy” to realize the comprehensive cascade utilization of primary energy.

As of now, Siemens H-class gas turbines have been on the market for nearly 10 years, with an ignition operating time of more than 1.5 million hours and nearly 100 units sold worldwide. Among them, the largest order came from Egypt. In 2015, the Egyptian government signed a large energy order worth 8 billion euros with Siemens-the introduction of power generation projects with 24 H-class gas turbines as the main body.