Kwon O.C. – TechConnect Briefs

Performance of a heat-recirculating combustor for thermophotovoltaic power devices with photonic crystal structure

Kim H.K., Kim T.-Y., Kim H.K., Kim T.-Y., Kwon O.C., Sungkyunkwan University, KR

The demand for high-performance portable power sources is recently enhanced due to the increasing use of electronic devices. Portable power systems using the combustion of hydrocarbon fuels have been considered as a novel alternative to [...]

Design of a heat-recirculating combustor for a thermophotovoltaic system

Kim H.K., Kim T.-Y., Kim H.K., Kim T.-Y., Kwon O.C., School of Mechanical Engineering Sungkyunkwan University, KR

Recently, the demand for light, fast-charging and long-lasting portable power sources to replace current lithium-ion batteries has been increased because of development of portable electronic devices such as laptop computers, cellular phones and signal equipments. [...]

Properties of nonpremixed ammonia-substituted hydrogen-air flames

Joo J.M., Um D.H., Kwon O.C., Sungkyunkwan University, KR

The effects of ammonia (NH3) substitution on the extinction and nitrogen oxide (NOx) emissions of nonpremixed hydrogen (H2)-air flames at normal temperature and pressure were experimentally studied to evaluate the potential of partial NH3 substitution [...]

Properties of nonpremixed ammonia-substituted hydrogen-air flames

Joo J.M., Um D.H., Kwon O.C., Sungkyunkwan University, KR

The effects of ammonia (NH3) substitution on the extinction and nitrogen oxide (NOx) emissions of nonpremixed hydrogen (H2)-air flames at normal temperature and pressure were experimentally studied to evaluate the potential of partial NH3 substitution [...]

Propagation and Emissions of Ammonia-substituted Hydrogen/Air Flames

Lee J-H., Lee S.I., Lee J-H., Lee S.I., Kwon O.C., Sungkyunkwan University, KR

In order to evaluate the potential of partial ammonia (NH3) substitution to improve the safety of hydrogen (H2) use in general and the performance of internal combustion engines in particular, the propagation, development of surface [...]

Measured and predicted performance of a micro-thermophotovoltaic device with a heat-recirculating micro-emitter

Park J.H., So J.S., Moon H.J., Kwon O.C., Sungkyunkwan University, KR

A new configuration of a 1-10 W micro-thermophotovoltaic (micro-TPV) device with a heat-recirculating micro-emitter is studied experimentally and computationally. In the micro-TPV device thermal energy is directly converted into electrical energy through thermal radiation without [...]

Measured and predicted performance of a micro-thermophotovoltaic device with a heat-recirculating micro-emitter

Park J.H., So J.S., Moon H.J., Kwon O.C., Sungkyunkwan University, KR

A new configuration of a 1-10 W micro-thermophotovoltaic (micro-TPV) device with a heat-recirculating micro-emitter is studied experimentally and computationally. In the micro-TPV device thermal energy is directly converted into electrical energy through thermal radiation without [...]

Flame synthesis of carbon nanotubes using a double-faced wall stagnation flow burner

Woo S.K., Hong Y-T, Kwon O.C., Sungkyunkwan University, KR

The potential of using a double-faced wall stagnation flow burner in mass production of carbon nanotubes was evaluated experimentally and computationally. With nitrogen-diluted premixed ethylene-air flames established on the Ni-coated stainless steel or Ni-sintered, double-faced [...]