Irsching power plant

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Irsching power plant
Irsching power plant 30082017 1.JPG
location
Irsching power plant (Bavaria)
Irsching power plant
Coordinates 48 ° 46 '3 "  N , 11 ° 34' 48"  E Coordinates: 48 ° 46 '3 "  N , 11 ° 34' 48"  E
country Germany
Data
Type Gas and steam power plant
Primary energy Fossil energy
fuel Natural gas , mineral oil
owner Uniper
Joint Power Plant Irsching GmbH (GKI)
operator Uniper
Project start 1966
Chimney height 200 m
f2
f2

The Irsching power plant is located near the town of Vohburg an der Donau in the district of Irsching. The natural gas-fired plant consists of a total of five independent units , of which the two oldest units Irsching 1 and 2 have been closed. The three younger units Irsching 3 to 5 are planned for decommissioning for financial reasons, but because of their systemic relevance they have to remain operational as cold reserves to ensure grid stability .

While the first three blocks are designed for use with natural gas and heating oil, blocks 4 and 5 use natural gas as fuel in a combined cycle process with high efficiency (approx. 60%). The Federal Network Agency and the operator are arguing about the decommissioning of units 4 and 5 .

history

Around 1955, a price drop appeared on the international mineral oil market, which led energy suppliers in Europe to increasingly rely on power plants that generate electricity on the basis of oil. These power plants seemed to gain acceptance for use in the base load range, which is why this development intensified within the Free State of Bavaria after the construction of the hard coal-based power plant in Aschaffenburg , after it was found that the import of coal from the distant regions was too cost-intensive. At the same time as mineral oils, nuclear energy began to establish itself, but at this point it was too expensive to be used for generating the base load. The Bavarian energy suppliers therefore agreed to promote the further expansion of the oil-fired power plants until commercial nuclear energy is available. An important development in the positioning of the power plant was the establishment of another mineral oil refinery in Bavaria by the British Petroleum ( BP ) group, which acquired a plot of land near Ingolstadt between the municipalities of Vohburg and Irsching and began the first earthworks there in 1965. For Isar-Amperwerke , this was the decision to build a power plant in Irsching right next to the refinery.

The plant had an economic impact on per capita income, particularly in the 1970s. Statistically, the income difference in the district of Pfaffenhofen an der Ilm was 12% below the national average between 1961 and 1966. After the power plant and the refinery went into operation in 1970, the difference decreased to 4.9% compared to the national average, until 1975 it was up to 3.3% can be shortened. The reason for this is that the training of the workers for the operation of the refinery and the power station is higher and therefore the wage level is generally set higher. Compared to the rest of Bavaria, the settlement of these large industrial companies meant that the gross domestic product for a rural area was rather unusually high. The actual economic benefit of the companies themselves was limited to the Vohburg area, while the products of the refinery, the power plant and the later built petrochemical plant in Münchsmünster initiated industrialization in the district.

Block 1

In 1966, the energy supervisory authorities of the state of Bavaria approved the construction of an oil power plant with an output of 150 MW. Originally it was planned to cost 70 million DM and to go into operation in autumn 1968. The block was ordered from Siemens-Schuckertwerke and work on the site began in 1967. Nevertheless, there were a few problems at the start, which is why the commissioning of the unit was postponed to summer 1969. During the construction there were various difficulties to avoid, including the river Paar between the power plant and the Danube, from which the power plant should get its cooling water. Overall, there were two ways to bypass the flow. The first solution was to use steel pipes to bridge the river to the underground concrete pipes. The other solution was to build the pump houses directly at the power plant and to move the couple into an underground pipe. However, since the first variant was more cost-effective, it was decided to use steel pipes. The same solution was used for the return pipeline into the Danube.

In the absence of a rail connection, large components could not be delivered directly to the Irsching power plant. Therefore, they were forced to deliver them by train to Ernsgaden station and then bring them to the power plant on flatbed trucks.

business

In 1969 the block went online. It was the first power plant in the world whose process sequence was fully automated. The first block of the Pleinting power plant had the same automation system .

The first experiences with the advanced plant automation were already made when the power plant was run in. While in older power plants many switching operations had to be carried out by the staff and problems were identified, this was done automatically in Irsching 1. During the trial run of the system and afterwards, the automatic system did not cause any problems with regard to status queries, but the programming of the individual processes caused various difficulties during operation of the system and in the event of malfunctions. As a result, a total of 30 failures of the block were recorded during the first 11,000 operating hours, of which, with 19, more than half had no cause in the system automation. The errors that had their origin in the automation were mainly due to the program flow, while three of the malfunctions were again due to human errors, because three encoders were set to the wrong limit value. Overall, however, the automation concept proved its worth and was also used in other power plants in optimized versions from Irsching 1 onwards.

Cold reserve and shutdown

After Isar-Amperwerke had optimized the electricity procurement and cooperated more closely with Bayernwerk , the block was preserved, the chimney was sealed and the block was kept in cold reserve from 1995 onwards. At the end of 2006, the block was closed because it no longer met the current requirements for energy generation.

Block 2

Contrary to the original plan to build further blocks of the 150 MW class in Irsching, the construction of a 300 MW second block was announced in 1969. In contrast to Irsching 1, Irsching 2 should be fired with light heating oil. However, during the planning phase, the unit's output was increased to 330 MW. In 1970 the block went into construction.

business

In 1972 the block went online.

On December 31, 1987, there was a serious incident in the block when the turbines were to be cold started after a ten-day shutdown. The turbine has already had 58,000 operating hours since it was commissioned in 1972 and underwent 838 starts, 110 of which were cold starts. During the start-up, one of the low-pressure parts burst in less than a hundredth of a second and hurled debris up to a distance of 1.3 kilometers around the power plant. When investigating the cause of the accident, it was found that the shaft, which was 7,500 millimeters long and 1,760 millimeters in diameter, had cracked due to a manufacturing defect that was not recognized as such during installation. The ultrasonic test at the Union -Werk power plant in Mülheim an der Ruhr had already found that there were four cracks in the shaft, the largest of which extended 130 millimeters axially and 60 millimeters radially along the shaft. However, the measurement technology was not yet accurate enough to recognize the cracks as faults, which is why the unclear finding was not taken into account. The shaft was then the world's largest shaft for a steam turbine. The reason for the crack was the material used (28NiMoCr V 8 5), which had too little fracture toughness and was no longer used for the following turbines after the incident.

One consequence of the accident was the extensive testing of similar runners made of the same material as was used in Irsching 2. Appropriate tests for the manufacturing processes of these turbines have been established and prescribed by the Association of Electricity and Heat Generators (VGB). In the incident, the unit's machine house was partially destroyed. The roof of the turbine house was completely destroyed over an area of ​​15 × 30 meters. The property damage to the block amounted to 25 million marks, which was covered by the machine insurance of the power plant. The shaft is one of the world's largest technical metallic fractures and has been on public display since 2011 in the laboratory building of the Society for Materials Testing in Zorneding .

Cold reserve and shutdown

After the Isar-Amperwerke had optimized the electricity procurement and cooperated more closely with the Bayernwerk , the block was preserved, the chimney sealed and kept in cold reserve from 1995. The block was closed at the end of 2012.

Block 3

Due to delays in the planning of a joint nuclear power plant for the Isar-Amperwerke and the Bayernwerk , the Isar nuclear power plant (today Block 1 of the facility), the conventional power plants were forced to expand again. That is why the decision was made to build a third block with an output of 440 MW in Irsching for around DM 140 million. In contrast to the other two blocks, block 3 should be equipped with a combination burner that can burn both oil and gas. It was expected that natural gas from the Soviet Union would be burned. Although it was not possible to operate the unit at full load all year round with natural gas from this country because the supplies were insufficient, it was possible to transfer a considerable part of the energy supply to this power plant unit. In 1971, Isar-Amperwerke ordered the 440 MW block from Kraftwerk Union, which was scheduled to go into operation in October 1974. In 1972, construction of the block began.

business

After a construction period of two years, the block was completed in 1974 and connected to the grid.

On February 15, 1992 an incident occurred after the block had been cold started after a six-week shutdown. The start-up process with natural gas was started slowly at 5:00 a.m. and initially two of 20 burners were switched on. The other burners should be switched on one after the other. However, at 5:05 a.m., one of the flame monitors gave the message during the second ignition attempt that one of the burners that had already been ignited had gone out. The operating staff therefore tried to start the burner manually at 5:06 a.m., whereupon a deflagration caused the boiler to explode. The reason for this was that the boiler had filled with gas. The course of the accident was initially difficult to understand. The system had had a total of 141 cold starts up to this point. While the Isar-Amperwerke suspected a defect, the operating procedure was too problem-free for the investigating TÜV Bavaria / Saxony for a defect to lead to this damage. After more than a year, the Institute for Energy Systems at the University of Bochum , commissioned by TÜV, was able to determine the cause of the accident, which was due to a design fault in the boiler. Too little combustion air with too fast a flow in the boiler and water in the boiler could mean that the gas flame did not burn properly. The total damage amounted to a sum of 56 million marks. The block was not able to go back into operation until mid-1994. The TÜV drew appropriate lessons from the incident and handled the approval of certain operating conditions, such as those used in Irsching when starting up to reduce NO x values, in multi-burner operation by means of stricter regulations.

Cold reserve since 2012

In May 2012, E.ON announced that it would shut down Block 3 in 2013. In December 2012, however, the Federal Network Agency took up the block as a reserve to stabilize the network, so E.ON was responsible for the cold reserve of the block and thus for the constant operational readiness of the block until March 2016. It was also contractually stipulated that if the block is classified as systemically relevant by the Federal Network Agency E.ON, the block may not be shut down after the contract expires in 2016. As of May 2016, the block is still systemically relevant, but has been registered for final shutdown. However, this can only take place when the systemic relevance is removed. The operator announces the shutdown on December 31, 2023 Template: future / in 3 years.

Block 4 "Ulrich Hartmann"

In 2005, Johannes Teyssen , at that time a member of the E.ON Energie Board of Management , announced in a statement that they wanted to continue to maintain and expand the infrastructure over the next few years, which is why a new gas and gas plant was being built for the Irsching site. Planned steam combined cycle power plant . The block should be an SGT5-8000H , the most powerful gas turbine in the world, with an efficiency of up to 60%. As early as May 2006, the water law approval procedure for the block was initiated with the government of Upper Bavaria. It was planned that the gas turbine system of the block would initially be completed by mid-December 2007 in order to test it in a trial run by Siemens. At the same time, the construction of the steam plant with the steam turbine was to be continued and, from February 2011, the gas turbine was to be linked to the combined cycle power plant. Due to the additional planning of Irsching 5 and the trial phase of Irsching 4, this block was now intended for commercial commissioning after the completion of Irsching 5.

Construction started on the block in 2006. By the end of April 2007, the gas turbine for Irsching 4 was completed in the Siemens gas turbine plant in Berlin. With a length of 13 meters and a height of 5 meters, the gas turbine manufactured in Berlin was a difficult-to-transport component of the plant. The gas turbine was initially transported by ship via the Havel , Elbe-Havel Canal , Mittelland Canal , Main , Main-Danube Canal and Danube to Kelheim . There, within a day, it was reloaded from the ship onto a low-loader, which was approved by the TÜV . The turbine was transported from Kelheim to the Irsching power station, 37 kilometers away. The entire transport took four weeks.

As early as December 2007, the turbine was ready for testing by Siemens and thus fired for the first time. On March 7, 2008, the turbine generator was synchronized with the power grid for the first time and on April 24, 2008 it ran at full load for the first time. The turbine was extensively tested over the years 2008 and 2009 and the test series was completed in August 2009. The gas turbine exceeded the expected values ​​and achieved an output of 375 MW. As part of this, work began on dismantling the turbine in order to check individual components for wear and any damage. At the same time, work has already started on the block's steam power plant, which is to be operated in combination with the turbine in the future. Construction of the block was completed in December 2010.

business

After a slow start-up over several weeks, the block reached its full output of 578 MW for the first time on May 11, 2011 under observation by TÜV Süd and the builder Siemens as part of a record attempt in which the block achieved an efficiency of 60.75% and thus broke the world record. Irsching 4 lost this record in January 2016 when the Lausward power plant near Düsseldorf achieved an efficiency of 61.5% with an improved variant of the gas turbine. On July 22, 2011, the block completed its test operation and went into commercial operation. The inauguration of the power plant block took place on September 15, 2011, attended by 250 guests from politics, business and science, including the Bavarian Prime Minister Horst Seehofer . During the inauguration, the block was christened Ulrich Hartmann , which E.ON justified by naming traditional pioneering power plants after personalities.

At the beginning of 2012, the Russian-Ukrainian gas dispute led to a throttling of gas deliveries to Germany, which meant that Unit 4 had to reduce its output by a third, despite a tense situation in the electricity grid. In 2012, the power plant, which is designed for 4500 operating hours per year, was only connected to the grid for 2000 hours. In view of the low electricity prices on the exchange, the operation was therefore not considered to cover costs . Due to the poor operating situation, E.ON threatened to temporarily shut down the block in 2013. As a result of an agreement with the owners of Block 5 and the network operator Tennet TSO , Block 4 has also been held as a network reserve since 2013 and financially supported by Tennet, which in turn can pass the costs on to customers via the network charges. Tennet and the Federal Network Agency confirmed that the costs for this will be passed on to the consumer. In March 2015, E.ON said again that the plant should be shut down. On March 30th, the operator announced that the block should go offline on April 1st, 2016. However, decommissioning was not possible at this point, as all power plants south of the Main were classified as systemically relevant in January 2015 due to the upcoming decommissioning of the Grafenrheinfeld nuclear power plant .

Block 5

Block 5 under construction

In 2006, the expansion plans for the Irsching site were expanded to include the construction of a fifth block. In May 2006, the preliminary decision procedure under immission control law began. According to the plan, the plant should start operating in March 2009. For Block Irsching 5 (and not, as originally planned by E.ON for Block 4), the Gemeinschaftskraftwerk Irsching GmbH (GKI) was founded on April 11, 2006 and entered into the commercial register on July 19, 2006, in which, in addition to E. ON with 59.2% majority stake also N-ERGIE with 25.2% and Mainova with 15.6%. E.ON later sold 9% of the shares to ENTEGA. The company's share capital is 25,000 euros. Since the block can be completed faster than Irsching 4, the construction of this block was preferred to the construction of block 4. On July 7, 2006, the € 450 million combined cycle unit was ordered from Siemens by the Irsching joint power plant. In 2006 the first work on the block began.

business

On May 17, 2010, Irsching 5 went into operation after two years of construction. At an official ceremony, in the presence of Bavaria's Minister of Economic Affairs, Martin Zeil , the joint power plant was put into operation.

In December 2012, according to ARD information, it became known that the operators of Block 5 should have written a letter to Prime Minister Seehofer in which they expressed their intention to temporarily shut down the block due to the worsened economic situation. The operators are said to have emphasized the political framework as a requirement for the restart. In fact, E.ON confirmed the information on December 7th. Erwin Huber , chairman of the economic committee in the state parliament, stated about the conflict situation that the municipal utilities that are involved in the block make up to 10 million euros a year in losses with the power plant, which is unacceptable in the long term. The network operator Tennet then asked the operators to continue operating the system until March 2013, which they received. On April 18, the system owners agreed that the system would be kept as a network reserve, which means that the costs for maintaining the service would be borne by Tennet, who in turn could pass on the costs for the redispatch operations to the consumers via the network charges. Tennet and the Federal Network Agency confirmed that the costs for this will be passed on to the consumer.

Overall, the generation of the system fell from 4758 full load hours in 2010 and 4702 full load hours in 2011 to 2035 full load hours in 2012 and 680 full load hours in 2013. The utilization of Irsching 5 is below the average for similar gas-fired power plants, which is due to the fact that, in contrast to the large number of comparable plants, no combined heat and power generation was implemented. In March 2015, E.ON said again that the plant should be shut down. On March 30th, the operator announced that the block should go offline on April 1st, 2016. However, decommissioning was not possible at this point in time, as the upcoming decommissioning of the Grafenrheinfeld nuclear power plant meant that all power plants south of the Main had been classified as systemically relevant since January 2015.

Block 6

In June 2018, the network operators Tennet, Amprion and TransnetBW tendered contracts for the construction of four power plants designated as “special network equipment” with a total output of 1200 MW, each of which should have an output of 300 MW. The southern Germany area was requested as the location for the four plants, whereupon Uniper applied for the Irsching location and was subsequently awarded the contract to build the plant. Like the other modern units, the plant will be fired with natural gas. The background for the new block 6 is the phase-out of nuclear power, which will lead to a reduction in secured capacity in Bavaria and which should be ready for use quickly for emergency measures if wind energy and photovoltaics cannot provide enough energy. In contrast to the other blocks, however, the financing is to be secured by the state through full allocation of the costs to the network charges. The block will therefore not take part in pricing on the electricity market. According to the tender request, the system must be operational from October 1, 2022.

In contrast to Irsching 4 and 5, Irsching 6 is supposed to have a different purpose in the power supply, which requires different technical requirements. While Irsching 4 and 5 are used to ensure system security to prevent network instabilities, Irsching 6 should also cover the need in the event of a fault. The fact that Irsching 6 is only planned to be maintained until 2030 is due to the fact that the facility is planned as a bridge between the nuclear phase-out in 2022 and the completion of the high-voltage direct current lines by 2030. In addition, the plan is to continue to use the system as network-supporting redundancy after 2030.

On July 16, 2019, Uniper held a public information event on the project in Vohburg, in which around 150 residents took part. At this point in time the permit was expected to be submitted in September or October 2019, so that the permit for the block will be in place in the summer of 2020. Construction of Irsching 6 is to begin in 2020, the assembly of the large components will begin in 2021 and the test run will be carried out in spring 2022.

Decommissioning request for units 4 and 5

On February 26, 2016, E.ON subsidiary Uniper , which had taken over the conventional power plant business on January 1, 2016, filed a lawsuit against Tennet with the Bayreuth Regional Court to enforce the closure of Irsching 4 and 5. At the same time, Uniper filed a class action lawsuit against Tennet with the Düsseldorf Regional Court, as the remuneration for maintaining the blocks in reserve in recent years was too low.

Due to the lack of economic market prospects for both units, the owners again announced the closure at the end of March 2017.

On October 1, 2020, Block 5 is scheduled to participate in the electricity market again because gas prices had fallen due to the corona pandemic.

Location details

Originally, the site was intended for the construction of four to five 150 MW units, so that the overall structure would have a capacity of 600 to 700 MW. Blocks 1 to 3 had a pipe connection with the refinery in Vohburg, which was directly adjacent to the site, which saved the construction of oil tanks, which would have been necessary if supplies had been supplied by ships or rail.

In order to dissipate the energy from the blocks built from 2006 and 2008, the high-voltage line from Irsching to Raitersaich was converted from 220 kV to 380 kV, as well as due to the changed load flows through the new blocks, due to the annual increase in energy demand of the industrial region by around 5% Ingolstadt , the transmission capacity of the 110 kV power between Ingolstadt and Etting has been expanded, as otherwise the remaining redundancy would be overloaded if a line failed. In order to prevent the 220 kV line from Irsching to Neufinsing from being overloaded in the event of a failure, this high-voltage line was also converted to 380 kV, which required the installation of two 380/110 kV transformers in the Irsching substation and the installation of a new one 380/21 kV machine transformers for block 2 to feed power from the generator into the grid with the new voltage level.

cooling

The cooling of all blocks is ensured from the Danube, and the cooling water is returned to the Danube after use. With the commissioning of Unit 3 in 1974, however, the cooling water capacities at the site were already exhausted in 1975. This led to the fact that the Bavarian State Office for Water Supply and Water Protection demonstrated in its heat load calculation that the construction of cooling towers was necessary for Irsching if the plant wanted to maintain full load operation. The load plans of the energy suppliers therefore stipulated that the base load should not be carried by oil and gas power plants as before, but mainly by lignite power plants and Bavaria's nuclear power plants, so that the units in Irsching should be converted to operation at medium load in the long term.

District heating

An alternative cited in 1975 for the removal of waste heat from the first three blocks was the extraction of district heating, but this was not discussed further because the Ingolstadt power plant near Großmehring could have absorbed any loads more efficiently than Irsching. In 2005, the use of district heating from Irsching was examined again in a preliminary study by the Bavarian State Office for Environmental Protection. In particular, the industrial customers in the area, including Exxon with 100 MWth heat requirement, Bayernoil Ingolstadt with 6.41 MWth demand, Bayernoil Vohburg with 20.8 MWth demand and Bayernoil Neustadt with 28.1 MWth demand, would have a corresponding heat demand up to the temperature range of 90 ° C. It was therefore proposed to build a combined cycle plant in Irsching for this purpose and to establish a corresponding energy network with Exxon, Bayernoil Vohburg, Audi and Stadtwerke Ingolstadt. In a detailed study in 2008, the consideration was examined in more depth after E.ON announced the construction of two combined cycle plants at the Irsching site in 2006. The study revealed the feasibility of the remote and process steam extraction from the Irsching power plant for the adjacent Bayernoil Vohburg. A first part of the Ingolstadt heating network has been in operation since mid-2011, but so far without the Irsching power plant.

Technology block 1

With a thermal input of 434 MW, the block achieved a gross electrical output of 150 MW and a net output of 142 MW. The gas-tight welded Benson boiler worked with a forced circulation of the feed water, which was passed once through the boiler and then on to the steam turbine. The boiler could produce 475 tons of steam per hour at a pressure of 190 kgf / cm 2 (187 bar) and a temperature of 535 ° C. This was then led to the turbine of the block, which consisted of a high pressure part and three low pressure parts. The design allowed the condensers to be installed below the low-pressure parts. The last stage turbine baffles had a length of 75 cm. The block's generator was hydrogen-cooled and could achieve an apparent power of 187.5 megavolt amperes. The energy that was generated there could be fed directly into the 110 kV network through transformation, while for later blocks it was already being considered to expand the outdoor switchgear by a feed node for the 220 kV network. The cooling water for the block was taken from the Danube and fed through steel and concrete pipes with an inner diameter of 1.8 meters into the condenser, where it absorbed the residual heat and was then fed back into the Danube. The boiler itself was fired with heavy fuel oil. The input into the boiler was made by 16 burners, which burned the heavy oil in a sprayed form. Eight burners were attached to each side and worked independently of one another. Overall, the burners were able to achieve a heat rate of 2050 kcal / kWh. The fuel requirement of the block was 43,200 Nm 3 / h in natural gas operation, which was installed later, and 37 tons per hour in heating oil operation. 210 MWth were emitted via the condenser under full load at a cooling water temperature between 10 and 20 ° C.

In contrast to previous oil-fired power plants, the automation at Irsching 1 was very advanced, so that the system could operate without any intervention by the personnel. The steam superheater on the turbine was run dry during commissioning of the unit and at low partial loads so that the water level could be kept constant. In order to keep the heat loss low, a heat exchanger was also switched on in this power range, which absorbs the remaining energy after it has passed through the turbine. The water was then fed back into the feed water tank, in which it was kept 20 ° C. below the feed water temperature at the boiler inlet. The use of such a heat exchanger was a novelty that has not been used internationally so far. The kettle is housed in a container frame with a height of 51.3 meters, which allows the kettle to expand in all directions when heated. The frame is surrounded by two double concrete cylinders, which extend laterally over a 110 ° radius and thus form the outbuildings, including the entire block with the boiler frame. The elevators of the block as well as the stairwells and auxiliary systems are located within the two kidney-shaped forms. The chimney, which is 200 meters above ground level, stands on top of the boiler house with a height of 80 meters.

Technology block 2

The original technical projection from 1969 envisaged that the block should achieve a gross output of 300 MW with an expected net generation of 284 MW. With a thermal input of 824 MWth, the block achieved a gross electrical output of 330 MW and a net output of 312 MW. In contrast to Irsching 1, Irsching 2 is equipped with a Sulzer boiler that could generate 950 tons of steam per hour at a live steam pressure of 181 bar and a temperature of 535 ° C. The fuel requirement of the block was 82,080 Nm 3 / h in natural gas operation and 68 tons per hour in heating oil operation. 385 MWth were delivered via the condenser at full load at a cooling water temperature between 10 and 20 ° C. The net efficiency of the block is 38%. As with Block 1, the boiler house in Block 2 is 80 meters high and the total chimney height is 200 meters from the height of the terrain.

Technology block 3

With a thermal input of 1034 MWth, the block achieved a gross electrical output of 440 MW and a net output of 415 MW. In contrast to Irsching 2, Irsching 3, like Irsching 1, is again equipped with a Benson boiler . The steam boiler generates 1275 tons of steam per hour at a live steam pressure of 212 bar and a temperature of 535 ° C. The fuel requirement of the block is 103,000 Nm 3 / h in natural gas operation and 87 tons per hour in heating oil operation. The condenser delivers 525 MWth under full load at a cooling water temperature between 10 and 20 ° C. As with blocks 1 and 2, the boiler house in block 3 is 80 meters high and the total chimney height from the ground level is 200 meters.

Technology block 4

The combustion heat output of the block is 1028 MWth. This block is a prototype with which Siemens wanted to test the commercial market readiness of this type of power plant. In the simple circuit without a steam system, the later series unit achieves an output of 340 MW, in combined operation with a steam circuit up to 530 MW. In contrast to the series product, the SGT5-8000H gas turbine has around 3,000 additional measuring points, which Siemens used to test this prototype. The turbine itself has been designed for 200 starting processes with around 4500 operating hours per year with the focus on covering medium and peak loads. The block can run a ramp of up to 35 MW per minute. The block emits 330 g CO 2 per kWh into the environment.

Technology block 5

The combustion heat output of the block is 1750 MWth. The block has two gas turbines and one steam turbine. According to Siemens, the efficiency of the 847 MW block is 59.5%. The system is planned for 250 starts per year and can reach full load in 30 to 40 minutes from a cold start, which Siemens particularly emphasizes as a regular load for compensating for fluctuating feed-in of renewable energies.

Technology block 6

In contrast to blocks 4 and 5, Irsching 6 should be able to start faster thanks to specialized technical properties that blocks 4 and 5 cannot achieve due to the technical limits. The block should be on the grid within 8 minutes of a complete cold standstill and be able to reach full load within 30 minutes.

Data of the power plant units

The Irsching power plant consists of five blocks, two of which have been shut down and three of which are held as cold reserves. Another block is in the planning phase.

block fuel Gross output Net power Net efficiency start of building Installation Shutdown
Irsching 1 Natural gas, heavy fuel oil 150 MW 142 MW 1967 1969 2006
Irsching 2 Natural gas, light heating oil 330 MW 312 MW 38% 1970 1972 2012
Irsching 3 Natural gas, light heating oil 440 MW 415 MW 39% 1972 1974 Reserve since 2012
Irsching 4 "Ulrich Hartmann" natural gas 569 MW 561 MW 60.4% 2006 2011 Reserve since 2013
Irsching 5 natural gas 860 MW 847 MW 59.7% 2008 2010 Reserve since 2013
Irsching 6 natural gas (300 MW) (2020) (2022)


Overview of the electricity production of the power plant blocks Irsching 3, 4, 5 in TWh . Data Source

Block \ year 2014 2015 2016 2017 2018 2019
Irsching 3 <0.01 0.02 0.01 <0.01 <0.01 0.01
Irsching 4 0.01 0.07 0.08 0.02 <0.01 <0.01
Irsching 5 0.05 0.48 0.11 0.11 <0.01 0.03

The electricity production of 0.01 TWh corresponds to a full load production of around 24 hours (415 MW net Irsching 3) or around 18 hours (561 MW net Irsching 4) or around 12 hours (817 MW net Irsching 5). As a result, all three power plant blocks have not been used significantly for electricity production in recent years.

Individual evidence

  1. ^ A b c German Society for Mineral Oil Science and Coal Chemistry: Petroleum and Coal: Natural gas, petrochemistry combined with fuel chemistry . Volume 19, part 1.Industrial publishing house von Hernhaussen KG., 1966, pp. 180, 276.
  2. ↑ a b Federal Network Agency:Power plant shutdown notification list of the Federal Network Agency.( Memento from January 22, 2017 in the Internet Archive ) May 25, 2016, p. 2 on January 22, 2017
  3. ↑ a b c d e f g h i j k Bavarian State Office for Environmental Protection: Heating network Ingolstadt - preliminary study. ( Memento from January 22, 2017 on WebCite ) 2005, pp. 18, 22, 24.
  4. ↑ a b Irsching gas power plant: Uniper and Co. start a new attempt at decommissioning. iwr.de, March 31, 2017, accessed on March 31, 2017 .
  5. ↑ Manfred Pohl: Das Bayernwerk: 1921 to 1996. Piper, 1996, pp. 374, 375.
  6. ↑ Michael Beer: Bavaria's boom in the farming country. Lulu.com, 2008, ISBN 1409205800 , pp. 8, 36, 65.
  7. ↑ a b c d e f g h i j Siemens Aktiengesellschaft: Siemens Review. Volume 35.Siemens -Schuckertwerke AG, 1968, p. 84.
  8. ↑ a b Leberecht Funk: The technological development and its consequences in terms of risk policy. 1972, p. 47.
  9. ^ Association of the Technical Monitoring Associations: TÜ: Security + Reliability in Business, Operations, Traffic. Volume 12. 1971, p. 66.
  10. ↑ a b c Isar-Amperwerke: Excerpt from the annual report - history ( Memento from August 18, 2015 on WebCite ). 2000, p. 13.
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See also

Commons : Kraftwerk Irsching  - Collection of images, videos and audio files