Maintaining proper membrane humidity is crucial to ensure optimal operation of a polymer electrolyte membrane fuel cell system. A membrane humidifier using the fuel cell exhaust gas to humidify the dry air is studied in this paper. We first develop a thermodynamic model, which captures the crucial dynamic variables of the humidifier, including the pressure, flow rate, temperature, and relative ...

BACKGROUND During mechanical ventilation effective conditioning of inspired air is important. In this respect, conventional humidifiers do not perform optimally. By design, a counter-flow-type humidifier should improve humidification and heating, but may increase resistance. METHODS We investigated mechanical impedance and work of breathing (using pressure-flow characteristics and additional ...

Computer animation and robotics have most of their mathematical foundations in common. So, Blender is a natural (but still undiscovered and imperfect) GUI candidate for robot simulation and programming. The robotics research community lacks an advanced graphical tool such as Blender, but, on the other hand, it has more advanced and efficient algorithms than Blender for the physically realistic ...

This paper shortly describes Blender 3D modification and its use for the design of mechanical parts. The 3D modification of the Blender modeling system and experiments made brought interesting results especially from the human-computer interaction field. The modification relies on the stereoscopy based devices which are currently available at the market. However, the stereoscopy has some drawba...

An essential requirement for an operating PEM fuel cell is providing proper water content in the membrane. To avoid water flooding an appropriate water balance is required. Here, an analytic model of a planar membrane humidifier for PEM fuel cell is proposed where the effect of dimensional parameters includes membrane thickness, membrane area and channel hydraulic diameter are investigated. A N...

an essential requirement for an operating pem fuel cell is providing proper water content in the membrane. to avoid water flooding an appropriate water balance is required. here, an analytic model of a planar membrane humidifier for pem fuel cell is proposed where the effect of dimensional parameters includes membrane thickness, membrane area and channel hydraulic diameter are investigated. a n...

Phase angle shift between the current and voltage with frequency has been reported for a single phosphoric acid fuel cell in the cell temperature from 100 °C to 160 °C and the humidifier temperature from 40 °C to 90 °C. An electrochemical workbench is employed to find the shift. The figure of phase angle shift shows a peak in high humidifier temperatures. The peak in phase angle shift directs t...

Apart from improving your renderer you will also have to model a scene of your own, which demonstrates the implemented algorithms. For this part you can use the freely available modeling package blender (www.blender.org). On our course web site you can find some information about using blender as well as a Python script, which can be executed within blender to export your scene as an NFF format...

High-flow nasal cannula (HFNC) oxygen therapy is carried out using an air/oxygen blender, active humidifier, single heated tube, and nasal cannula. Able to deliver adequately heated and humidified medical gas at flows up to 60 L/min, it is considered to have a number of physiological advantages compared with other standard oxygen therapies, including reduced anatomical dead space, PEEP, constan...

BACKGROUND In South Korea, a cluster of acute lung disease patients included lung injury disease suspected of being caused by the use of humidifier disinfectants. We examined the relationship between humidifier disinfectant exposure and clinically diagnosed humidifier disinfectant-associated lung injury (HDLI) in a family-based study. METHODS This case-control study included 169 clinically co...