Advanced Energy Conversion Technologies. High Efficiency Combustion Heating Systems by Regenerative Heat Exchangers.

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  • 高温エネルギー変換技術　　蓄熱式熱交換器を用いた高効率燃焼加熱システム
  • チクネツシキ ネツコウカンキ オ モチイタ コウコウリツ ネンショウ カネツ システム

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Abstract

The authors have studied regenerative heat exchanging systems in order to increase the thermal efficiency of combustion heating systems. In a study of regenerative burner systems, the authors have developed two types of low NOx burners. One is a radiant tube burner, the other is a direct firing burner. As a result, the NOx emission of both burners has been reduced to less than one-fourth provious levels. In a study of rotary regenerator systems, the rotary regenerator is sometimes more effective than regenerative radiant tube burner. In a study of non- oxidizing heater systems, the authors have developed a regenerative N2 jet heater. This system, an N2 jet heater with regenerative burner, can heat N2 gas up to 1, 773K, and can recycle the almost 100% of the high temperature N2 gas using a trio of heaters installed with two regenerative heat exchangers inside the combustion chamber. This system reduces the furnace length to less than one-fourth previous levels, and increases the thermal efficiency of furnaces to the same level as regenerative radiant tube burners. This paper presents an outline of these systems, and describes the effect of theirs use on the steel products furnaces.

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