• 보일러설비
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• no.12 s.167
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• pp.88-99
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• 2007

• 보일러설비
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• no.12 s.167
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• pp.100-103
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• 2007

• 보일러설비
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• no.12 s.167
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• pp.154-154
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• 2007

• 보일러설비
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• no.12 s.167
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• pp.155-155
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• 2007

• 보일러설비
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• no.12 s.167
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• pp.77-80
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• 2007

• 보일러설비
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• no.12 s.155
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• pp.115-119
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• 2006

• 보일러설비
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• no.12 s.155
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• pp.140-143
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• 2006

• 보일러설비
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• no.12 s.155
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• pp.106-109
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• 2006

• Journal of Energy Engineering
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• v.20 no.4
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• pp.330-337
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• 2011

In these days, the gas or kerosene boiler was usually used as heating system. This study was carried out to investigate the merits of X-L pipe boiler with electric heat line that was specially manufactured. The electric heat line was inserted into inside of X-L pipe and voltage was impressed to electric heat line and, as a result, temperature of X-L pipe filled with heat medium was increased. As changing the number of electric heat line and voltage, the characteristics of X-L pipe boiler and its mechanism on heat generation were studied. Furthermore, the economical efficiency was evaluated by comparing heating cost of X-L pipe boiler with those of kerosene boiler and natural gas boiler, respectively. As the results, it was confirmed that heating cost of X-L pipe boiler was showed as 28% of kerosene boiler and 58% of natural gas boiler.

• Plant Journal
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• v.8 no.1
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• pp.73-80
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• 2012

The structure and combustion characteristics, and the economic feasibility of the circulating fluidized bed combustion(CFBC) boiler using low grade coal were introduced. The economic feasibility is evaluated by comparing a 500 MW CFBC boiler power plant using low grade coal and a pulverized combustion boiler power plant with high grade coal. As the result of the evaluation, the pulverized coal combustion boiler power plant has an internal rate of return of 12.95%, 1,395.9 billion Korean won of net present value, and 6.26 years of payback period. On the other hand, CFBC boiler power plant has an internal rate of return of 13.54%, 1,704.3 billion Korean won of net present value, and 6.02 years payback period. Therefore, the CFBC boiler power plant has better feasibility in all aspects, as 0.59% higher of internal rate of return, 308.4 billion Korean won of higher net present value and 0.24 year of shorter payback period.