에너지플러스 시뮬레이션을 통한 하천수 열원 히트펌프 시스템의 적용 가능성 분석

손병후 한국 지열 · 수열에너지학회 2022 한국지열에너지학회논문집 Vol.18 No.2

A water source heat pump (WSHP) system is regarded as an energy-efficiency heating and cooling supply system for buildings due to its high energy efficiency and low greenhouse gas emissions. Recently, water sources such as river water, lake water, and raw water are attracting attention as heat sources for a heat pump system in Korea. This paper analyzed the applicability of a river water source heat pump system (RSHP). The river water temperature level was compared with the outdoor air and ground temperature levels to present applicability. In addition, the cooling and heating performance were compared through a simulation approach for the RSHP and a ground source heat pump (GSHP) applied to a large-scale office building. To compare the temperature level, the actual data were applied to the river water and the outdoor air, while the simulation results were applied to the ground circulation water. The results showed that the change in river water temperature throughout the year was similar to the change in outdoor air temperature. However, unlike the outdoor air temperature, the difference between the hourly and daily average river water temperatures was not large. The temperature level of river water was lower during the heating season and somewhat higher during the cooling season than that of the ground circulation water. Finally, the performance of the RSHP system was 13.4% lower than that of the GSHP system on an annual-based.

Evaluation of Water Temperature Difference Energy of the Raw Water from Paldang Water Intake Station

조용(Cho, Yong),박진훈(Park, Jin-Hoon),김영준(Kim, Youngjoon),박태진(Park, Tae Jin) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

The amount of the heating and cooling energy of water source heat pump using the raw water from the Paldang water intake station is investigated in the study. The Han river water is conveyed in the large-size shallowly buried pipe. Averaged water temperature at the position, 27 km from the Paldang water intake station, is increased by 1.11?C due to the geothermal energy transfer under the ground, therefore the raw water has more thermal energy than the river water. To estimate of the thermal energy for the raw water, it is assumed that the water source heat pump is used for the heating and cooling ventilation. When 5.0?C temperature difference energy of the raw water is used in the heat pump system all the year except for the January and February in which 3.0?C temperature difference energy is used. It is predicted that total 5,766.3 Tcal could be used in the metropolitan area a year, which is about 3.0% of the river water unutilized energy resources.

수자원 관리 정보 시스템을 이용한 수열에너지 잠재량 산정에 관한 연구

김홍교(Hongkyo Kim),남유진(Yujin Nam) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-

Recently, the Korean government has proposed the convergence technology of renewable energy as a national vision for the mandatory project of Zero Energy Building, (ZEB). Therefore, various renewable energy technologies are being introduced in buildings, and renewable heat source energies that can cope with heating and cooling loads are attracting attention. The hydrothermal energy includes seawater, river water, pipeline water and dam lake water. However, in Korea, river water, pipeline water and dam lake water excluding seawater were not recognized as renewable energy. Therefore the use of hydrothermal energy such as river, pipeline and dam lake water is limited. In this paper, quantitative analysis of the potential of hydrothermal energy in river water, pipeline water and dam lake water was conducted to examine applicability of hydrothermal energy. As a result, the potential of hydrothermal energy in Seoul is 534,220 TJ/year, Busan is 238,241 TJ/year and Daejeon is 21,134 TJ/year.

Development of Water-Source Heat Pump System Using Riverbank Filtration Water on the Waterfront

조용(Cho, Yong),김대근(Kim, Dea Geun),문종필(Moon, Jong-Pil) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05

A water-source heat pump system has been developed for cooling and heating of a green house on the waterfront in Jinju. In order to supply a heat source/sink of water in alluvium aquifer to the heat pump system, the riverbank filtration facility (two pumping wells and one recharge well) for water intake and injection has been constructed. To pump and recharge water sufficiently, the geometric design such as depth and diameter for the wells have been completed, and details of the well such as slot size and length of the screen and filter pack size have been designed based on the practical and theoretical design method including D30 technique. For the investigation of the hydrogeological characteristics, step-drawdown test, long-term pumping test, and recovery test have been carried out for two developed pumping wells. Step-drawdown test has been performed on 4 step flowrates of 150, 300, 450, 600m³/day for 1 hour, and long-term pumping test on flowrate of 500m³/day for 24 hours, and recovery test for 6 hours. Since the underground water filtrated by riverbank is flowing smoothly into the well, the water level goes down slightly for the long-term test. Consequently, the stable pumping flowrate for two pumping well has been predicted at least over 1,647m³/day which is larger than the flowrate of 1,000m³/day for a 60 RT heat pump system.

A STUDY ON THE POWER CONSUMPTION REDUCTION OF IDC FREE-COOLING HVAC SYSTEM WITH DAM DEEP WATER SOURSE

Kim Jae Yool(김재율),Yoon In Gyoo(윤인규),Kim Han Young(김한영) 한국유체기계학회 2021 한국유체기계학회 학술대회 논문집 Vol.2021 No.7

The high thermal density of IT servers and the rapid increase in data production are increasing the cooling load of data centers, Energy consumption in data centers are also increasing. In addition, with the advent of the knowledge information · based on smart devices and big data and the activation of cloud servers, the need for data centers are growing, and the demand for data centers are also expected to increase continuously. If we study the energy consumption trends of general data centers, the energy consumption of cooling and air conditioning systems to cool the heat of IT equipment accounts for about 40% of the total energy. In addition to efforts to reduce the power of servers and IT equipment, various methods are being studied to reduce the power consumption of cooling and air conditioning systems. Among them, the data center cooling system through outdoor air cooling achieves a lot of energy savings. Although this method can achieve a lot of energy savings, it causes problems due to environmental restrictions such as an increase in outdoor temperature and it causes problems due to air quality such as inflow of fine dust. Therefore, it is necessary to study a cooling system using a new stable source rather than a method that depends on a cooling system through outdoor air cooling. Among the sources, dam deep water has the advantage of being a stable source because it maintains a temperature suitable for the cooling system of the data center for a long time and the temperature distribution is even. Therefore, we would like to introduce the possibility of utilizing water energy through comparative analysis of power consumption between the IDC pre-cooling HVAC system with Dam deep water-thermal sourse and the air-cooled conditioning system.

적용 조건에 따른 수열 히트펌프 시스템의 성능 평가

정유준(Yujun Jung),이호성(Hoseong Lee) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6

The rapid increase of building energy consumption requires urgent development of clean and renewable energy conversion systems. In this respect, water source heat pump (WSHP) system have been suggested as one of the energy-saivng methods. However, the system performance of the WSHP can be varied according to the surrounding conditions. Therefore, in this study, we investigated the performance change of the WSHP system under various surrounding conditions. The performance is evaluated according to the building type, water body, and water intake distance. The performance is analyzed in terms of life cycle performance, considering the energetic, environmental, economic metrics. As a result, the energy consumption is significantly affected by the type of water body. The CO₂ emissions is affected by both building type and water body, and economic feasibility is further influenced by the building type. In conclusion, it was confirmed that investigation of the surrounding conditions and custom design for high performance are important.

수열에너지 이용을 위한 열펌프 냉난방 시스템의 표준 및 인증기준 동향

서정식(Jeong Sik Seo),조용(Yong Cho),윤석호(Seok Ho Yoon),허재혁(Jae Hyeok Heo) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7

본 논문은 수열원 열펌프를 이용한 냉난방시스템에 적용되고 있는 표준과 인증기준에 대한 동향을 소개하고자 한다. 수열에너지는 직접 또는 간접열원으로 사용되는 열원으로 국내에서는 신재생에너지로 지정되어 있다. 수열에너지를 사용하는 방법 중, 열펌프를 이용하여 냉방 및 난방에 사용되는 기술이 보편적으로 활용되고 있으며, 현재 신재생에너지 제도내에서 지열원, 해수열원과 더불어 관리되고 있다. 열펌프시스템 관점에서 냉난방시스템을 위한 시험조건 및 각 열원에 대한 표준 조건 및 특성을 분석하고, 국내의 인증제도 및 해외 인증제도에 대해서 소개하고 향후 표준의 개발 방향에 대해서 이야기하고자 한다.

하천수 활용 수열 히트펌프 시스템의 에너지 및 환경 성능 평가

정유준(Yujun Jung),이호성(Hoseong Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11

As building energy consumption increase, there is increasing interest in using various energy sources to heat and cool buildings. One possible way to reduce energy consumption is the use of Water Source Heat Pump (WSHP). Because the water source heat pump utilizes the relatively constant water temperature compared to air temperature, water source heat pump can has a higher efficiency and reduce the energy consumption for heating and cooling. However, water source heat pump has not been actively studied in Korea, therefore, we comprehensively estimated the performance of water source heat pump in terms of energy and environmental impact. For energy consumption calculation, we modeled the water source heat pump system and estimated the carbon dioxide emissions by Life Cycle Climate Performance (LCCP). As a results, the water source heat pump can reduce the energy consumption by 11.1% and CO2 emissions by 11.5%. Therefore, the estimated results demonstrates that water source provides positive potential for heating and cooling production.

동적 에너지 시뮬레이션을 이용한 수열원, 지열원 및 공기열원 히트펌프 시스템의 성능 비교분석

권영식(Kwon Youngsik),배상무(Bae Sangmu),남유진(Nam Yujin),윤린(Yun Rin),박창용(Park Chang Yong),이호성(Lee Hoseong) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.4

As the boundary of water source energy has recently expanded to the use of river, lake, and pond waters, the water source heat pump (WSHP) system is becoming a major issue. However, to apply the WSHP system to a real building, a comparison and analysis with a ground source heat pump (GSHP) and an air source heat pump system (ASHP) are required. Moreover, it is necessary to accurately analyze the performance of a WSHP based on the building load condition. Therefore, this study aims to analyze the performance of WSHP, GSHP, and ASHP systems for large office buildings using a dynamic energy simulation. The seasonal performance factor (SPF) of the system was calculated as 3.8 and 2.5 for a WSHP system, 3.8 and 2.6 for a GSHP system, and 2.9 and 1.7 for an ASHP system during the cooling and heating periods, respectively. The performance of the WSHP system was similar to that of the GSHP system and was 23% and 32% higher than that of the ASHP system, respectively.

태양열집열기를 이용한 원수열원 히트펌프의 성능 개선

한창호(Changho Han),김진영(Jinyoung Kim),조원희(Wonhee Cho),김용찬(Yongchan Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11

In this study, solar-assisted raw-water source heat pumps(SA–RWSHPs) are investigated to prevent performance degradation owing to low water source temperature during the heating season. Solar collectors in the SA–RWSHPs are used to increase the heat source temperature in winter. The water source temperature and performance of the SA–RWSHP are analyzed according to flow rate of water source, solar sources and source side of heat pumps in detail. Furthermore, the unit and system COP of heat pumps are analyzed through the dynamic simulation. The raw-water source temperature and the unit COP of the SA–RWSHPs in winter were on average of 7.5℃ and approximately 24% higher, respectively, than those of the conventional RWSHPs. Additionally, the system COP of the SA-RWSHPs was approximately 21% higher than that of the RWSHPs owing to the solar collectors that were used to heat the domestic hot water, reducing the energy consumption of the auxiliary heater of hot water storage tank. The proposed SA–RWSHPs showed a good performance throughout the year, resulting in reducing the energy consumption of buildings.