Our Unique Approach

Finned tube bundle production

The single row tube bundles used by LACC-JNK have been a proven steam condensing technology for over 20 years and these high performance heat exchangers have been installed on hundreds of ACC units worldwide.

LACC-JNK’s tube bundle is a real South Korean product. LACC-JNK has a Korean based joint venture partner to fabricate aluminum cladded carbon steel strips. The cladded steel strip are then sent to LACC-JNK’s tube forming plant where the oblong tubes are formed and welded. The final stages of the tube bundle manufacturing process, including the finning and brazing process, are completed in LACC-JNK 100% owned facility located in the city of Dangjin, South Korea.


This in house production ownership makes LACC-JNK the only ACC supplier in the industry that has complete control over the production of the finned tube bundles from start to finish. Controlling the fabrication of the core component of an ACC allows LACC-JNK to supply premium single row finned tubes at very competitive prices and superior quality.


For the balance of key components such as structural steel components, ducting and piping, LACC-JNK has a global network of experienced and qualified ACC sub vendors.

LACC-JNK believes that both clients and vendors form a partnership with the goal of achieving a cost-effective, premium quality and well performing ACC.

Our competencies, our expertise and our tools

Designing air cooled condensers is a complex matter. LACC-JNK has a team of skilled and experienced professionals to assure that the best possible solution is offered to our clients. Our technical experts were pioneers in the introduction of the state of the art single row tube technology in the 90’s, and our design & engineering team has extensive experience in the design and fabrication of the ACC structure & ducting, interconnecting piping, condensate tanks, and other steel components.

LACC-JNK has all the modern software tools that are used by our skilled personnel during the bidding stage as well as during project execution so that the most appropriate ACC can be selected and designed for every possible situation. A brief description of some of our tools (ACC selection program, Tekla Structures, and CFD software) with some particular applications is given below.

LACC-JNK’s ACC Thermal Rating Program is one of the most advanced in the industry. It was developed in-house by technical experts with many years of experience in thermal engineering related to dry cooling systems and with extensive know-how of the single row tube technology. The bundle heat transfer characteristics and air side pressure drop were determined in a Korean based test facility that has a wind tunnel for evaluating the thermal performance of heat exchangers, as well as tested in our own facilities. The ACC selection tool has been validated extensively allowing LACC-JNK to provide the most efficient ACC design every time.

Tekla Structures is a software package that is utilized to create a complete and intelligent 3-D model of the entire air cooled condenser (steel, ducting, interconnecting piping, etc.). The entire model can also be exported and sent to the customer for integration into their plant design software. All parts, from the structural steel all the way down to the smallest nut and bolt, are accounted for in each 3-D model.   Additionally, all parts are linked with the fabrication drawings in such a way that if something is changed in the shop drawings, it is reflected in the 3-D model, and vice versa. Using this kind of software greatly reduces the possibility of components not fitting during the construction phase or having interferences between the ACC and other equipment on site.


CFD (Computational Fluid Dynamics) software is a very helpful tool that can model real world conditions and help determine the proper location and orientation of the ACC. LACC-JNK’s skilled professionals can account for prevailing wind directions, large nearby structures, site topography, nearby heat sources and any other factors that may impact the performance of the ACC and select the optimal plant layout, taking into account the ACC configuration, in order to minimize any undesirable thermal performance losses.