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Baiman Chen

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Papers by Baiman Chen

Research paper thumbnail of Fluid dynamics and heat transfer investigations of swirling decaying flow in an annular pipe Part 1: Review, problem description, verification and validation

International Journal of Heat and Mass Transfer, 2015

Research paper thumbnail of Experimental Study of a Liquid Dehumidification Unit Integrated in a CCHP System with Varying Operating Condition

Research paper thumbnail of Laminar flow and heat transfer in a quasi-counter flow parallel-plate membrane channel (QCPMC)

International Journal of Heat and Mass Transfer, 2015

ABSTRACT A parallel-plate membrane contactor with side inlets and side outlets has been designed ... more ABSTRACT A parallel-plate membrane contactor with side inlets and side outlets has been designed and used for air humidity control. The contactor is comprised of a series of quasi-counter flow parallel-plate membrane channels (QCPMC). The laminar flow and heat transfer in the QCPMC are investigated based on a unit cell including one membrane and half of the channel. The equations governing the momentum and heat transports are established together with a uniform wall temperature boundary condition and numerically solved by a finite volume difference approach. The mean product of friction factor and Reynolds number (fRe) and Nusselt number (Num) are then obtained and numerically validated by those taken from other well-known publications. Influences of the Reynolds numbers (Re), entrance ratios (xin/x0), aspect ratios (x0/H), and various fluids with different Prandtl numbers (Pr) on the (fRe)m and Num are obtained and analyzed. It can be found that a distinct vortex is generated for the water stream flowing through the QCPMC when the Re is greater than 100. Further, for the same x0/H, the Num of the LiCl stream is the largest, and next the water stream, the least the air stream.

Research paper thumbnail of Validation and Visualization of Decaying Vortex Flow in an Annulus

Research paper thumbnail of Development and Assessment of Thermoacoustic Generators Operating by Waste Heat from Cooking Stove

Engineering, 2012

This paper presents the development and assessment of two low-cost, travelling wave, thermoacoust... more This paper presents the development and assessment of two low-cost, travelling wave, thermoacoustic generators operating by waste heat energy from cooking stove. One powered by waste heat from a propane-driven stove, the other powered by waste heat from a wood-burning stove. The propane-driven thermoacoustic generator was successfully demonstrated to produce approximately 15 watts of electricity using a commercial audio loudspeaker. The wood-burning thermoacoustic generator was successfully constructed and tested to generate a maximum of 22.7 watts of electricity under a pressurised condition. The latter has a high potential to be used by over 1.5 billion people in rural communities for applications such as LED lighting, charging mobile phones or charging a 12 V battery. A comprehensive power assessment of the propane-driving generator as well as the development and performance assessment of the wood-burning generator are described throughout this article.

Research paper thumbnail of Fluid dynamics and heat transfer investigations of swirling decaying flow in an annular pipe Part 1: Review, problem description, verification and validation

International Journal of Heat and Mass Transfer, 2015

Research paper thumbnail of Experimental Study of a Liquid Dehumidification Unit Integrated in a CCHP System with Varying Operating Condition

Research paper thumbnail of Laminar flow and heat transfer in a quasi-counter flow parallel-plate membrane channel (QCPMC)

International Journal of Heat and Mass Transfer, 2015

ABSTRACT A parallel-plate membrane contactor with side inlets and side outlets has been designed ... more ABSTRACT A parallel-plate membrane contactor with side inlets and side outlets has been designed and used for air humidity control. The contactor is comprised of a series of quasi-counter flow parallel-plate membrane channels (QCPMC). The laminar flow and heat transfer in the QCPMC are investigated based on a unit cell including one membrane and half of the channel. The equations governing the momentum and heat transports are established together with a uniform wall temperature boundary condition and numerically solved by a finite volume difference approach. The mean product of friction factor and Reynolds number (fRe) and Nusselt number (Num) are then obtained and numerically validated by those taken from other well-known publications. Influences of the Reynolds numbers (Re), entrance ratios (xin/x0), aspect ratios (x0/H), and various fluids with different Prandtl numbers (Pr) on the (fRe)m and Num are obtained and analyzed. It can be found that a distinct vortex is generated for the water stream flowing through the QCPMC when the Re is greater than 100. Further, for the same x0/H, the Num of the LiCl stream is the largest, and next the water stream, the least the air stream.

Research paper thumbnail of Validation and Visualization of Decaying Vortex Flow in an Annulus

Research paper thumbnail of Development and Assessment of Thermoacoustic Generators Operating by Waste Heat from Cooking Stove

Engineering, 2012

This paper presents the development and assessment of two low-cost, travelling wave, thermoacoust... more This paper presents the development and assessment of two low-cost, travelling wave, thermoacoustic generators operating by waste heat energy from cooking stove. One powered by waste heat from a propane-driven stove, the other powered by waste heat from a wood-burning stove. The propane-driven thermoacoustic generator was successfully demonstrated to produce approximately 15 watts of electricity using a commercial audio loudspeaker. The wood-burning thermoacoustic generator was successfully constructed and tested to generate a maximum of 22.7 watts of electricity under a pressurised condition. The latter has a high potential to be used by over 1.5 billion people in rural communities for applications such as LED lighting, charging mobile phones or charging a 12 V battery. A comprehensive power assessment of the propane-driving generator as well as the development and performance assessment of the wood-burning generator are described throughout this article.

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