지역 기후가 유닛형 지중열교환기 성능에 미치는 영향

배상무,김재민,남유진 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.1

지열 히트펌프 시스템은 지중열원을 이용하여 안정적인 운전이 가능하고, 에너지 생산에 대한 신뢰성이 높다. 그러나, 높은 초기투자비용으로 인해 보급 및 활성화가 지연되고 있다. 선행연구에서는 기존 지열 히트펌프 시스템의 단점을 극복하기 위해 수평형과 유닛형 지중열교환기를 개발하였다. 그러나 이러한 지중열교환기는 기상과 기후조건에 많은 영향을 받는다. 따라서, 도입지역에 따른 유닛형 지중열교환기의 성능을 분석하기 위해 도입지역의 지중온도 변화 분석이 필요하다. 본 연구에서는 각 지역에 따른 유닛형 지중열교환기의 성능을 수치해석을 통해 정량적으로 분석하였다. 그 결과, 서울, 대전, 부산 순서로 유닛형 지중열교환기의 채열량은 각각 33.9W/m, 34.2W/m, 37.2W/m으로 확인하였다. 도입지역에 따라 지중열교환기의 성능은 최대 9.7%의 차이를 나타냈다. A ground source heat pump (GSHP) system can stable system operation by using underground heat source and has high reliability for energy production. However, wide-spread of the GSHP system is delayed to high initial investment costs. In previous studies, horizontal and unit-type ground heat exchanger (GHX) have developed to overcome disadvantages such as high initial cost. However, these performances of GHXs are greatly influenced by climate and weather conditions. It is necessary to analyze the performance of GHX according to the ground temperature change in the installation site. In this study, the ground temperature of each installation site confirmed and performance of unit-type GHX quantitatively analyzed by numerical analysis. As the result, the performance of the unit type GHX was 33.9 W/m in Seoul, 34.2 W/m in Daejeon, and 37.2 W/m in Busan.The result showed the difference performance of GHX according to local climate was maximum of 9.7%.

태양광열-지열 이용 Tri-generation 시스템의 적정 용량 설계를 위한 해석 연구

배상무,남유진 한국 지열 · 수열에너지학회 2019 한국지열에너지학회논문집 Vol.15 No.4

Renewable energy systems are essential for the realization of zero energy building (ZEB). Moreover, the integrated system using solar and geothermal energy has been developed for heating, cooling and power of the building. However, there are few studies considering various design factors for system design. In this study, in order to develop the optimal design method for the system, the performance of the system was quantitatively compared and analyzed through dynamic simulation. Moreover, economic analysis was conducted based on the results of system performance. Through the performance and economic analysis results, the optimal design method of the tri-generation system was proposed.

지열시스템 적합지 맵 구축을 위한 시스템성능의 영향 인자 분석

배상무,남유진,황석호 한국신·재생에너지학회 2016 신재생에너지 Vol.12 No.S1

The performance of ground source heat pump system significantly depends on ground properties such as thermalconductivity, underground water level, quality of underground water and groundwater flow. Therefore, in order to optimally designsystem, it is necessary to estimate thermal properties before the system design. On the other hand, fundamental survey for systemdesign, such as thermal response test or pumping test, require cost more than 5,000 dollars. To simply consider GSHP systems as heatsource system in building design, it is necessary to roughly grasp the feasibility of the system in the step of building basic planning. Inthis research, sensitivity analysis of design factors was conducted to develop a suitable map for a ground source heat pump system inKorea. This paper mainly describes the effect of ground thermal properties on the system performance. Numerical simulations withground heat and groundwater transfer model was used for quantitative analysis. The result showed that thermal conductivity of soiland groundwater flow are very important factors and the differential of system performance according to them was a maximum of29%.

부착형 태양광열 모듈의 상용화를 위한 최신기술 및 시장 동향 분석

배상무,남유진,채호병,오진환,조정흠,류남진,정상헌 한국 지열 · 수열에너지학회 2023 한국지열에너지학회논문집 Vol.19 No.1

In order to overcome the limitations of the individual renewable energy technologies such as photovoltaic (PV) and solar-thermal and effectively realize zero energy buildings, the photovoltaic-thermal (PVT) technology is being proposed. The current PVT module was simply combined with a PV panel and a solar-thermal collector. Therefore, it was difficult to commercialize because the PVT module is heavy and has no significant advantages compared to applying the individual technology. In this study, an attached PVT module is proposed for the commercialization and securing competitiveness in the renewable energy market. The attached PVT module enables on-site work with a simplified manufacturing process and can significantly reduce the supply price of the product. Moreover, it can be easily applied on already installed the PV panels. This study aims to commercialize the attached PVT module, the basic data was established as follows: (1) latest technology related to PVT module, (2) Global trends of the PVT module market. The possibility of commercialization of the attached PVT module was reviewed based on the results of the latest technology and market trends analysis. The supply price of the attached PVT module is lower than the existing products and it is considered that there is a high possibility of commercialization and introduction market with the advantage such as utilizing the existing PV industry and market. Moreover, the attached PVT module can be produced simultaneously the thermal and electrical energy, and it can be presented as an innovative alternative that can respond to the energy demand for residential sector

동적 시뮬레이션을 이용한 건물 에너지 성능 비교분석

배상무,이경희,여성구,김은지,양재광,전재영,이준혁,배영민,김성훈,강영모 한국동력기계공학회 2017 동력시스템공학회지 Vol.21 No.6

에너지 이용의 고효율화와 친환경적인 건축물 설계를 위해서는 건물부문에서 요구되는 냉·난방 및 급탕 부하와 같은 다양한 부하를 정확하게 예측해야한다. 많은 연구들이 동적 시뮬레이션 툴을 이용하여 건물 에너지성능에 대해 평가하고 분석하고 있다. 그러나 다양한 시뮬레이션을 이용하여 각각의 부하 결과에 대한 비교분석과 시뮬레이션 기능이나 특성분석에 관한 연구는 드물다. 따라서 본연구에서는 동일한 입력조건을 갖는 건물에 대해 3가지 동적 시뮬레이션을 이용하여 건물의 냉·난방 부하 및 에너지 수요를 분석하고 각 시뮬레이션의 특성을 비교분석하였다. 시뮬레이션 비교분석 결과, 냉·난방 부하 및 에너지 요구량은 정가각형과 남북방향 조건에서 가장 낮았다.

상업용 건물을 대상으로 한 태양광열-지열 이용 Tri-generation 시스템의 성능분석

배상무,남유진 대한설비공학회 2022 설비공학 논문집 Vol.34 No.5

본 연구에서는 오피스 건물에 Tri-generation 시스템을 적용하여 건물부하와 연계한 시스템의 연간 열 및 전기적 성능을 정량적으로 분석하고 기존의 GSHP 시스템과 비교를 통해 Tri-generation 시스템의 적용가능성을 평가하였다. 결과는 다음과 같다. (1) 난방기(12~3월)의 Tri-generation 시스템과 GSHP 시스템의 시스템 성능을 비교한 결과, 태양광열 모듈을 이용한 Tri-generation 시스템이 GSHP 시스템보다 시스템 평균 COP가 16% 높은 것으로 확인되었다. 이는, 히트펌프가 지중열원보다 높은 온도의 태양열원을 공급받아 성능이 향상된 것으로 사료된다. (2) 냉방기(5~9월)의 Tri-generation 시스템과 GSHP 시스템의 시스템 성능을 비교한 결과, 두 시스템의 시스템 COP의 차이는 거의 없는 것으로 확인되었다. 그러나, 태양광열 모듈에 의해 생산된 전력을 시스템 운전에 자체적으로 이용할 경우 Tri-generation 시스템이 GSHP 시스템보다 시스템 평균 COP가 50% 향상되었다. (3) 향후, 건물이나 지역에 따라 달라지는 부하패턴을 고려하여 Tri-generation 시스템 각 유닛의 적정용량 산정하기 위한 최적화 기반 시뮬레이션을 실시할 예정이다. It is necessary to introduce renewable energy systems for zero energy building realization. Recently, many individual renewable energy systems are introducing the commercial buildings. However, the individual renewable energy systems have many disadvantages such as imbalance between energy generation and use, and intermittent energy production dependent on weather conditions. To resolve these disadvantages, a Tri-generation system combined with a photovoltaic-thermal (PVT) and ground source heat pump (GSHP) is proposed. The Tri-generation system can overcome the disadvantages of the individual system and stably provide thermal and electrical energy to buildings. Many researchers are conducting a feasibility assessment of the introduction of the Tri-generation system for energy independence in residential buildings, but there are few studies on performance analysis of the Tri-generation system for commercial buildings. In this study, to promote the supply of the Tri-generation system for commercial buildings, performance analysis of the system was conducted through an energy simulation model. The annual thermal and electrical production of the Tri-generation system was analyzed and the coefficient of performance (COP) was compared between the Tri-generation system and the conventional GSHP system. As for the performance analysis results, the COP of the Tri-generation system was up by 50% compared to the conventional GSHP system.

태양광열-지열 하이브리드 시스템의 설계인자 영향도 검토

배상무(Sangmu Bae),김재민(Jaemin Kim),박병관(Byung Gwan Park),남유진(Yujin Nam) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6

실제 건물적용을 위한 태양광열-공기열원 히트펌프 융복합 시스템의 실증실험

배상무(Sangmu Bae),오진환(Jinhwan Oh),채수원(Soowon Chae),남유진(Yujin Nam) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

Renewable energy systems are being actively applied to realize zero energy building(ZEB). However, a single technology centered on solar-thermal, photovoltaic and ground source heat pump is mostly being used. This single technology was difficult to stably respond to the energy demand of buildings. Therefore, in this study, the integrated system combining photovoltaic-thermal and air source heat pump was proposed for overcoming the disadvantages of single technology and realizing the ZEB. In order to verify the accuracy performance of integrated system, the real-scale experiment plant and monitoring system was constructed. The heating performance of integrated system was analyzed based on monitoring data. As the result, the average coefficient of performance of the integrated system was calculated to be 2.50. The performance of the integrated system could be improve when the contribution of the PVT module is higher.

복합열원을 이용한 Trigeneration 시스템의 성능분석

배상무(Sangmu Bae),남유진(Yujin Nam) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.4

지중온도회복을 고려한 지열 히트펌프 시스템의 운전방법 검토

배상무(Sangmu Bae),전재영(Jae-Young Jeon),권영식(Young Sik Kwon),남유진(Yujin Nam) 한국지열·수열에너지학회 2020 한국지열에너지학회논문집 Vol.16 No.4

Ground source heat pump (GSHP) systems are actively introduced as cooling and heating conditioning systems of buildings due to annual stable performance and easily maintenance. However, ground temperature imbalance is occurred when the GSHP is used for a long period. Therefore, in this study, we proposed the operation method of the system that considered the recovery time of heat source temperature. The entering water temperature (EWT) and heat exchange rate (HER) were comparatively analyzed according to the continuous and intermittent operation. Furthermore, the underground thermal environment was evaluated by numerical analysis model. As the result, the intermittent operation was a maximum of 12.3% higher HER during the heating period than the continuous operation. In addition, the overall ground heat source temperature at the intermittent operation was higher than it at the continuous operation.