직접공급방식 지역난방시스템의 적정공급온도 및 단위부하 분석

다국어 초록 (Multilingual Abstract)

District Heating System(DHS) is one of the most excellent systems in terms of energy saving and environmental protection. The current indirect connection in Korea is applied to the case of big scale, it brings about heat loss in its network. Moreover, high-priced heat exchanger facilities are required. Direct connection has some advantages such as energy saving and low initial cost compared with indirect connection since heat exchange is not required in machine room. Furthermore, renewable energy such as solar heat, geo-thermal heat and heat pump and others can be applied to the direct connection in district heating as supply temperature is comparatively low. However, direct connection is not economical for heavy load and it is difficult to keep the temperature of supply water low. When direct connection is applied, it is the most important to supply stable heat source to consumers.
In the previous study, appropriate supply pressure for direct connection are suggested. Therefore, the objective of this study is to offer the fundamental data for applying the direct connection in district heating to Korea by investigating the unit heating load and optimal temperature based on supply condition and stability for consumers from the previous studies. The results of this study are follows; 1) Heating loads(including domestic hot water supply) for each consumers in conventional direct connection system were proved to be excessive comparing to simulated results. 2) The optimal range of supply water temperature was 60~90℃ in case of supply for domestic hot water to each households.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 간접공급방식과 직접공급방식
• 3. 직접공급방식 공급온도 영향인자 검토
• 4. 지역난방수의 적정 설계공급온도
• 5. 단독주택의 단위연결난방부하 검토
• 6. 단독주택의 단위연결급탕부하 검토
• 7. 결론
• 참고문헌

참고문헌 (Reference)

1 이은탁, "지역난방연결 특수시설의 열사용 실태 분석" 2007

2 한국지역난방공사, "지역난방수 직접공급방식 지역난방시스템의 적용 타당성 연구" 한국지역난방공사 2009

3 한국에너지기술연구소, "지역난방 공급 아파트의 수요가 시설 효과 검증 연구" 한국에너지기술연구소 1992

4 "일본 공업 규격"

5 김내현, "유체역학 (Fluid Mechanics : Fundamentals & Applications)" McGraw-Hill Korea 328-334, 2005

6 대한주택공사, "온돌시스템 개발 연구"

7 Jong Soo Seong, "The Feasibility of Direct Connection in District Heating System in Korea through the Case Studies"

8 Deborah A. Kaminski, "Introduction to Thermal and Fluid Engineering" Wiley 430-431, 2004

9 ASHRAE HANDBOOK, "HVAC Systems and Equipment"

10 Danfoss, Denmark, "District heating substation for district for direct heating with mixing loop and domestric hot water systems"

11 "District Heating and Cooling Connection Handbook"