Methods of Gas Analysis
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7 per cent of coal substance. If we assume that the coal sub- stance of a first-class brown coal contains 5. 8 per cent of hydrogen, then the air-dried coal contained rr rr r o - = 4. 45 per cent of hydrogen, from which, 100 in the combustion, would result 4. 45 x 9 = 40. 05 per cent water. 19. 5 per cent of hygroscopic water is, however, already present in the coal, therefore the combustion gases will contain 40. 05 + 19. 5 = 59. 5 per cent of water, which has 6 x 59. 5 = 357 calories of laten...t heat of evaporation. The air-dried coal therefore has an available heating power of 5818 357 = 5461 calories. Since, however, the original coal contained 7 per cent of "mine moisture, " the available heating power of the residual 93 per cent 2r 434 GAS ANALYSIS PART in of air-dried coal 5461 * 93 = 5078. 7 calories. To ascertain the available heating power of the coal containing "mine moisture, " the latent heat of evaporation of this " mine moisture, " 7 x 6 = 42 calories, must be subtracted from the result just obtained.
What to read after Methods of Gas Analysis?
You can find similar books in the "Read Also" column, or choose other free books by Walther Hempel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
7 per cent of coal substance. If we assume that the coal sub- stance of a first-class brown coal contains 5. 8 per cent of hydrogen, then the air-dried coal contained rr rr r o - = 4. 45 per cent of hydrogen, from which, 100 in the combustion, would result 4. 45 x 9 = 40. 05 per cent water. 19. 5 per cent of hygroscopic water is, however, already present in the coal, therefore the combustion gases will contain 40. 05 + 19. 5 = 59. 5 per cent of water, which has 6 x 59. 5 = 357 calories of laten...t heat of evaporation. The air-dried coal therefore has an available heating power of 5818 357 = 5461 calories. Since, however, the original coal contained 7 per cent of "mine moisture, " the available heating power of the residual 93 per cent 2r 434 GAS ANALYSIS PART in of air-dried coal 5461 * 93 = 5078. 7 calories. To ascertain the available heating power of the coal containing "mine moisture, " the latent heat of evaporation of this " mine moisture, " 7 x 6 = 42 calories, must be subtracted from the result just obtained.
What to read after Methods of Gas Analysis?
You can find similar books in the "Read Also" column, or choose other free books by Walther Hempel to read onlineMoreLess
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