Chui Woo Roh

Title: Chui Woo Roh: Energy Systems and Turbine Inventions

Introduction

Chui Woo Roh is an inventor based in Sejong, South Korea. His work includes inventions related to heat-pump steam production and turbine efficiency. He is associated with the Korea Institute of Energy Research and has 2 patents.

Latest Patents

Roh’s listed patents address energy conversion and power-generation systems.

- **Heat pump system for producing steam by using recuperator.** This invention uses a recuperator to exchange heat between refrigerant leaving the condenser and refrigerant entering the compressor. The process supercools the refrigerant, helps raise temperatures at the compressor inlet and outlet, and increases the condenser’s heat output. That additional heat can be transferred to circulating water in the steam-producing cycle, improving steam-production efficiency.

- **Partial admission operation turbine apparatus for improving efficiency of continuous partial admission operation and method for operating turbine apparatus using same.** This invention uses a rotor, nozzle assembly, and inlet disk with admission holes of different passage areas. Controlling the holes according to operating flow conditions adjusts the working fluid’s partial-admission ratio. The design is intended to support continuous partial-admission operation in supercritical power-generation systems, simplify turbine design and manufacture, and improve efficiency as operating conditions change.

Career Highlights

Roh’s patent work focuses on practical approaches to improving thermal efficiency in energy systems. His inventions address both the recovery and use of heat in steam production and the control of working-fluid flow in turbines.

Collaborations

Roh is associated with the Korea Institute of Energy Research. His listed coworkers include Gil Bong Lee and Ho Sang Ra.

Conclusion

Chui Woo Roh’s inventions apply heat recovery and adjustable partial admission to improve the efficiency of steam production and turbine operation.