• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.8 no.3
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• pp.19-28
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• 2012

In a heat only boiler system of a steam power plant, outdoor air required for combustion is made to pass through indoor space for increasing the boiler efficiency. Due to heat generated by various equipments, temperature of the air that enters the boiler will increase resulting in combustion efficiency. If the outdoor air temperature is low, however, this will cause freezing and bursting of pipes which are filled with water. It is especially fatal to small diameter pipes and pipes connected to measuring instruments. The purpose of this study is find operation and outdoor conditions where this phenomena can happen and also establish preventive measures to avoid this problem.

• Journal of the Korean Institute of Gas
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• v.10 no.4 s.33
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• pp.17-22
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• 2006

Both of district heating(DH) system and natural gas(NG) supply system have benefits in clean energy supply and having energy efficiency and savings. The issue of duplicate investment and supply requirement of only for cook occur several conflicts such as destruction of the Beneficiary Pays Principle and Cross Subsidization, etc. Under the circumstance, the purposes of this research are to consider several issues of cross subsidization in NG and DH industries and to present the following alternatives for resolving related problems. First of all, a charging mechanism in the energy cost must be improved so as to maintain the positive relation between cost and benefit. That is, the beneficiary-pay principle must be strictly applied. Secondly, the extended supply of DH through HOB(Heat Only Boiler) must be strictly limited. Finally, we need to improve efficiency for the benefit of market participants.