25 MWe + 21 MWth
"Cheong Soo CHP is the most successful engine plant in South Korea and we are very proud to supply power and heat to our customer by using Wärtsilä 20V34SG engines."
- Mr DP Lee, Gas Equipment 1 Team, Sales Manager, JB Enertek Co., Ltd.
Electrical load minimal but head demand maximum at night
parallel to the grid
Meeting the noise level and
requirements set by
Charging of heat accumulators during daytime and consumption
of heat at night
Wärtsilä 34SG gensets provide continuous and reliable energy
Advanced emissions and noise reduction equipment were installed
Minimum 85% efficiency
24 hours a day
Avoiding the costs of installing external site connections
Compliance with regulations
allows plant to operate efficiently and avoid potential penalties
In May 2007, Wärtsilä was awarded a contract from JB Enertek Co., Ltd., South Korea, to deliver engineering and equipment (EEQ) in two phases for a 25.3 MWe combined heat and power plant (CHP). The plant is located in Cheong Soo community in Cheon Ahn City, approximately 100 kilometres south of Seoul, Korea.
The purpose of the Cheong Soo trigeneration plant is to provide district heating and electricity to a suburban area covering approximately three square kilometres with about 6400 households and public buildings. Phase 1 of the project comprised two Wärtsilä 20V34SG natural gas-fuelled generating sets equipped with a heat recovery system for district heating purposes. Phase 1 was commissioned and handed over in February 2010. Phase 2 consists of an identical genset and was completed in 2015. The three gensets generate electricity in parallel with the electrical grid and supply district heating to the town network.
During the warm summer periods, the plant also provides district cooling. Due to the tariff policy in South Korea, selling only electrical power to the grid is not feasible. At night, the electrical load in the suburban area is so low that the amount of heat generated by the engines is significantly reduced. At the same time, the amount of heat needed by households is at its maximum. This is why installing a heat accumulator comes into question: it allows the Cheong Soo plant – operating essentially in island mode – to run continuously on high load, and hence at high levels of total efficiency: more than 85%. The heat generated during the daytime is partly stored in the accumulator to be used during the following night.
This was the first CHP project delivered by Wärtsilä in South Korea under the CES (Community Energy System) concept which is based on South Korean legislation to encourage decentralised energy production. The objective of the CES concept is to supply electricity and heat from independent power production facilities to commercial, residential, business and hospital buildings in specific areas. After the completion of the second phase, the total electrical output of the plant will be raised to 25 MWe and thermal output to 21 MWth.
Wärtsilä designed, procured and delivered the equipment and provided technical advisory services at the site during the installation and commissioning. The erection and installation of the equipment were carried out by JB Enertek and local contractors.
| Customer || JB Enertek Co., Ltd (IPP) |
| Type || Wärtsilä 34SG gas trigeneration power plant |
| Operating mode || Flexible baseload |
| Gensets || 2 x Wärtsilä 20V34SG & 1 x Wärtsilä 20V34SG |
| Total output || 25 MWe + 21 MWth |
| Fuel || Natural gas |
| Scope || EEQ (Engineered Equipment Delivery) |
| Delivered || 2010 & 2015 |
Read the success story in this brochure
Find in-depth info about CHP solution in this brochure
Read about the enabling major national savings through a new approach to system security
This video showcases Wärtsilä cogeneration references for cooling and heating.
If you want to know more about the Cheong Soo project, please contact
Vice President, Middle East, Asia & Australia
Wärtsilä Energy Solutions