Design and Experimental Investigation of a Heat Pipe Supported External Cooling System for HT-PEFC Stacks

2013 ◽  
Vol 10 (5) ◽  
Author(s):  
Jen Supra ◽  
Holger Janßen ◽  
Werner Lehnert ◽  
Detlef Stolten
Keyword(s):  
Experimental Investigation ◽  
Temperature Distribution ◽  
Heat Pipe ◽  
Cooling System ◽  
Polymer Electrolyte Fuel Cell ◽  
Active Area ◽  
Cell Area ◽  
Vertical Temperature ◽  
External Cooling ◽  
Vertical Temperature Distribution

A 10-cell high-temperature polymer electrolyte fuel cell (HT-PEFC) stack with an active cell area of 200 cm2 has been built up and tested with regard to the temperature distribution from cell to cell and over the active area since not every cell is cooled. Measurements with artificial reformate as a fuel show that the vertical temperature distribution over the active area is sufficiently small, with a maximum of 5.1 K at 550 mA cm−2. Additionally, the temperature gradient from cell to cell is sufficiently small with 10.7 K at 550 mA cm−2. As a result, it can be concluded that the heat pipe supported external cooling is well suited to cool HT-PEFC stacks with large active areas in reformate operation.

Design and Experimental Investigation of a Heat Pipe Supported External Cooling System for HT-PEFC Fuel Cell Stacks

2013 ◽  
Author(s):  
Jen Supra ◽  
Holger Janßen ◽  
Werner Lehnert ◽  
Detlef Stolten
Keyword(s):  
Experimental Investigation ◽  
Fuel Cell ◽  
Temperature Distribution ◽  
Heat Pipe ◽  
Cooling System ◽  
Active Area ◽  
Cell Area ◽  
Vertical Temperature ◽  
External Cooling ◽  
Vertical Temperature Distribution

A 10-cells HT-PEFC stack with an active cell area of 200 cm2 has been built up and tested regarding the temperature distribution from cell to cell and over the active area since not every cell is cooled. Measurements with artificial reformate as a fuel show that the vertical temperature distribution over the active area is sufficiently small, with a maximum of 5.1 K at 550 mA cm−2. Also the temperature gradient from cell to cell is sufficiently small with 10.7 K at 550 mA cm−2. As a result it can be mentioned, that the heat pipe supported external cooling is well suited to cool HT-PEFC stacks with large active areas in reformate operation.

An experimental and non-dimensional study on the vertical temperature distribution of a sealed ship engine room fire

2018 ◽  
Vol 165 ◽  
pp. 22-33 ◽  
Author(s):  
Jinhui Wang ◽  
Yu Jiao ◽  
Long Shi ◽  
Qimiao Xie ◽  
Guoqiang Li ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Vertical Temperature ◽  
Engine Room ◽  
Vertical Temperature Distribution

scholarly journals VI. The vertical temperature distribution the atmosphere over England, and some remarks on the general and local circulation

1912 ◽  
Vol 211 (471-483) ◽  
pp. 253-278 ◽  
Keyword(s):  
Temperature Distribution ◽  
British Isles ◽  
Vertical Temperature ◽  
Local Circulation ◽  
The Past ◽  
Rubber Balloon ◽  
Vertical Temperature Distribution

During the past four years a considerable number of small free balloons carrying selfrecording instruments have been sent up in the British Isles, and sufficient observations have now accumulated to give some idea of the conditions which prevail over England, to a height of about 10 miles, in summer and winter, in cyclonic and anticyclonic weather. The method of obtaining observations is fully described in a publication of the Meteorological Office, M.O. 202. It will suffice here to state that a small selfrecording instrument, weighing 1 oz. (35 gr.), is attached by about 30 ft. (9 metres) of strong thread to a small rubber balloon. The balloon is 1 ft. diameter when unstretched. It is filled with hydrogen until it is expanded to about 1 m. diameter, securely tied up, and then let go. The balloons generally rise until they burst, and carry the instrument on the average to a height of 10 miles (16 km). A label offering a reward of 5 s . is attached to the instrument, and the reward is claimed and the instrument returned in two cases out of three.

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