ANALYSIS OF BOILER TUBE HEAT TRANSFER UNDER OPACITY CONDITIONS
| Main Authors: | El-jummah A.M, Abdulrahim A.T, Ngala G.M |
|---|---|
| Format: | Article Journal |
| Terbitan: |
, 2011
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/833906 |
Daftar Isi:
- This paper work helps to experiment and the performance of boiler furnaces by understanding the effects of heat absorption, increased draft loss, over-heating of tubes and heat lost. This thereby, confirmed the effect of the lost performance of the overall boiler, and hence helps to develop means of eliminating the growth of either slagging or fouling or both (opacity). Practically, the boiler systems operate with a very substantial quantity of steam at an average pressure of 1.6 × 105Pa above atmospheric pressure, and a significant amount of total heat flow of 18.53kW is calculated. With the application of clay (0.8mm thick) assumed opacity effect, the average pressure reduces to 0.67 × 105Pa below atmospheric level, hence total rates of heat flow of 13.73kW. The fouling resistance is calculated as 0.00257m2.oC/W enough to satisfy that of boiler water, as a result of which a loss in performance of 3.76% was found to be possible. This is confirmed from the efficiencies calculated for a clean and a dirty boiler tubes that is 30.34% and 26.58% respectively