http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
사용자시설 유량 밸런싱 개선을 통한 지역난방시스템 안정성 확보방안 연구
안준성(Joonsung Ahn),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
The district heating system has been progressing rapidly in Korea. But because of the system with large scale, the pressure variation has been very serious and the user-side facilitys control had accordingly made it more difficult. Numerical simulation and field test were carried out in this study to verify the performance of the newly proposed control method with differential pressure valve(DPV) for user-side facilities of domestic district heating system, compared to the existing control method which consists of a combination of pressure differential control valve(PDCV) and temperature control valve(TCV). As results, it was proved that the averaged temperature difference between supply and return water increased to about 15℃, which yielded over 20% saving of mass flow rate per day of district hot water compared with the conventional control method. Only by improving the operation and control method of the user-side of district heating system, it is possible to actively respond to accidents such as heat pipe damage by maintaining the primary side piping system at a lower supply pressure and supply temperature, and operating it stably. By reducing pipe heat loss, it will be also possible to contribute to the improvement of the overall energy use efficiency of the district heating system.
세대 난방온도조절기 유량 밸런싱 개선을 통한 운전성능 향상 방안 연구
공병채(Byeongchae Gong),안준성(Joonsung Ahn),황지현(Jihyun Hwang),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
District heating, which is used in many apartment houses, has the advantage of reducing energy and decreasing air pollutants compared to individual heating. However, due to the flow rate deviation of the heating system of the users facility, the heating efficiency on the users side is deteriorating and the circulation pump power is wasted. This flow deviation is caused by the inability to control the differential pressure in the case of the system applied to the household. In order to improve this, the heating temperature controller used in household is replaced with a minimum flow rate linear control combined valve(DPV) to achieve flow balancing of the heating system. The replaced DPV achieves flow balancing by controlling the flow rate through proportional control. And improved flow balancing controls the same amount of heat at the minimum flow rate. This improves the temperature difference of the supply return water and reduces the pump power, resulting in a carbon neutral effect by reducing the pump power and electric energy.
이태원(Taewon Lee),황지현(Jihyun Hwang),안준성(Joonsung Ahn),이재문(Jaemoon Lee) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
Recently district heating system has evolved rapidly in Korea. But because of the system built on a massive scale, the pressure variation has been very serious and the user facility"s control had accordingly made it more difficult. In this study, the field test were carried out to verify the performance of the newly proposed control method with DPV, compared to the existing control method(PDCV and TCV). As results, it was proved that the averaged temperature difference between supply and return water increased to about 15℃, which yielded over 20% saving of mass flow rate per day of district hot water compared with the conventional control method.