• 월간 기계설비
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• s.13
• /
• pp.147-149
• /
• 1991

• 월간 기계설비
• /
• s.15
• /
• pp.111-114
• /
• 1991

• 월간 기계설비
• /
• s.16
• /
• pp.132-134
• /
• 1991

• 월간 기계설비
• /
• s.14
• /
• pp.110-112
• /
• 1991

• 월간 기계설비
• /
• s.7
• /
• pp.102-106
• /
• 1990

• 보일러설비
• /
• s.70
• /
• pp.89-93
• /
• 1999

• 보일러설비
• /
• s.71
• /
• pp.78-83
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• 1999

• 보일러설비
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• s.75
• /
• pp.73-75
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• 2000

• Journal of Energy Engineering
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• v.21 no.2
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• pp.144-151
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• 2012

A district heating system produces thermal energy and supplies it to a large region. District heating systems can provide higher efficiencies and better pollution control than localized boilers. The heat generated by a district heating system is distributed to the customer via a network of insulated pipes. For the optimal operation of a district heating system, it is important to predict the distributions of pressure, flow rate and temperature of heating fluid within the network of pipes at various operating conditions. In this work, a mathematical modeling was performed to predict the dynamic hydraulic-thermal behaviors of heating fluid in the network of pipes for a district heating system. The mathematical model accounts for the conservations of mass, momentum and energy. In order to verify the validity of modeling, the modeling results were compared with the monitoring data of Gang-nam Branch of District Heating.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.7 no.3
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• pp.160-166
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• 1978

Heat loss to the ground in ondol heating system is analyzed mathematically using conformal mapping and variable transformations, Both two-and three-dimensional systems are analyzed. Heated house is assumed to be rectangular shape. Mean value of heat loss to the ground can be obtained using Figure 2. Effects of thermal parameters to heat loss are discussed. Numerical examples are also given.