A5032825002- Geothermal Energy Systems and Applications
- Building Energy and Comfort Optimization
- Soil and Unsaturated Flow
- Integrated Energy Systems Optimization
- Plasma Diagnostics and Applications
- Drilling and Well Engineering
- Groundwater flow and contamination studies
- Dust and Plasma Wave Phenomena
- Electric Power System Optimization
- Energy Efficiency and Management
- Advanced Surface Polishing Techniques
- Advancements in Photolithography Techniques
- Diverse Topics in Contemporary Research
- Geotechnical Engineering and Analysis
- Education, Safety, and Science Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Mining and Gasification Technologies
- Korean Urban and Social Studies
- Energy and Environment Impacts
- Electrohydrodynamics and Fluid Dynamics
- Automotive and Human Injury Biomechanics
- Heat Transfer and Boiling Studies
- Particle accelerators and beam dynamics
- Metal and Thin Film Mechanics
- Dam Engineering and Safety
Inha University
2017-2023
GS Engineering (United States)
2022
Korea Advanced Institute of Science and Technology
2010
This study proposes a simple ground heat exchanger design capacity that is applicable in the schematic-design stage for several configurations used borehole exchangers (BHEs). Three configurations—single, compact, and irregular types—were selected, transfer rate per unit BHE was calculated considering interference. In case with typical configuration general range of thermal conductivity, compact decreased owing to interference as number BHEs increased. However, respect configuration,...
As the sizing of borehole heat exchangers (BHEs) is crucial for ground-source pump systems, which are becoming increasingly complex and diverse, novel tools required that can size both boreholes connected systems. Thus, an optimization-based method runs in TRNSYS with other component models proposed. With a focus on feasibility typical BHEs, irregularly placed using well-known duct-storage (DST) model inherently cannot describe irregular borefields examined. Recently developed modification...
Implant layer patterning is becoming challenging with node shrink due to decreasing critical dimension (CD) and usage of non-uniform reflective substrates without bottom anti-reflection coating (BARC). Conventional OPC models are calibrated on a uniform silicon substrate the model does not consider any wafer topography proximity effects from sub-layers. So existing planar cannot predict sub-layer such as reflection scattering light interfaces. This insufficient for layers BARC, e.g., implant...
Ground-source heat pump (GSHP) systems coupled with borehole exchangers (BHEs) are widely used as a renewable energy source. However, the high initial costs to install BHEs still acts an obstacle in expansion of these source systems. Specifically, South Korea, typical residential type corresponds apartment building building-to-land ratio for land efficiency, and thus space is usually insufficient. Furthermore, cost issue makes it difficult ensure feasibility GSHP projects this situation....
Installing renewable energy systems for zero-energy buildings has become increasingly common; building integrated photovoltaic (BIPV) systems, which integrate PV modules into the envelope, are being widely selected as systems. In particular, owing to rapid growth of information and communication technology, requirement appropriate operation control an important issue. To meet these requirements, a computational model is essential; however, some unmeasurable parameters can result in...
Ground-coupled heat pump systems have been widely used, as they are regarded a renewable energy source and ensure high annual efficiency. Among the system components, borehole exchangers (BHE) play an important role in decreasing entering water temperature (EWT) to pumps cooling season, consequently improve COP. The optimal sizing of BHEs is crucial for successful project. Other than existing methods, simulation-based design tool more applicable modern complex geothermal systems, it may also...
The earth provides a vast resource of groundwater from aquifers few meters beneath the surface. Thus, buildings that use underground space must be equipped with dewatering wells to drain permeated sewage pipelines ensure structural stability building. Although inflowing temperatures and flow rates are stable enough for used as an energy source, 79% is discarded through sewers, generating significant sewerage expenses. This study introduced novel heat exchanger module utilize unused source...
Proximity matching is a common activity in the wafer fabs<sup>1,2,3</sup> for purposes such as process transfer, capacity expansion, improved scanner yield and fab productivity. The requirements on accuracy also become more stringent CD error budget shrinks with feature size technology advances. Various studies have been carried out, using knobs including NA, inner sigma, outer stage tilt, ellipticity, dose. In this paper, we present results critical features of logic device, between an ASML...
In the extraction of ion beams from a source plasma through grid acceleration structure, one key improvement issues is fluence flux. Theoretical research has usually been focused on structure system and distribution electrostatic voltages over layers. present work, using self-consistent computer simulation between source, sheath potential, system, effect source-wall biasing flux three-grid examined. It found that strongly positive wall-biasing can significantly enhance by improving shape...
Unlike in the past, housing styles and characteristics have gradually diversified. Therefore, there is a growing interest residential environments that can meet people s needs beyond supply. The subjective satisfaction of residents main factor for sustainable development city. this study aims to suggest implications improving environment through empirical study. 2014 survey data GIS were used analysis. As research method, multi - level logistic regression analysis was analyze influence...
With increasing global concerns regarding indoor air quality (IAQ) and pollution, about regularly replacing ventilation devices, particularly high-efficiency particulate (HEPA) filters, have increased. However, users cannot easily determine when to replace filters. This paper proposes models estimate the dust loading levels of HEPA filters for an energy-recovery system that performs purification. The utilize filter pressure drops, revolutions per minute (RPM) supply fans, rated airflow modes...
A hyperthermal neutral beam (HNB) source is one of candidate methods to reduce plasma-induced damage problems. The HNB generated by vertical collisions between energetic ions and a reflector composed tungsten plate. We perform generation simulation using molecular dynamics algorithm. roughness the surface experimentally measured structure taken into consideration in simulation. energy angular distributions are obtained yield reflected particles found be good agreement with experimental data.
Adequate sizing of borehole heat exchangers (BHE) is crucial for successful design the ground-coupled pump (GCHP) system. Very recently, simulation-based methods have been proposed using an optimization tool and TRNSYS duct storage (DST) model. Other than existing BHE models, DST model can describe bore field by setting fewer parameters, apt optimization. However, cannot account irregular arrangements which are common in many projects. In this work, L-shape simulated with modifying a...
To achieve the goal of reducing greenhouse gas in buildings, Korean government formulated mandatory regulations that mandate installation renewable energy systems buildings. Because evaluation these is conducted at building design stage, it cannot be guaranteed target will show expected performance after its completion. In this study, regulation level supply obligation ratio (RER) by was compared according to cases through hourly-basis simulations. The system consisted a photovoltaic,...
Recent studies have highlighted the potential of hybrid ground source heat pump (HyGSHP) systems for enhancing coefficients performance (COPs) pumps and reducing total required length borehole exchangers (BHEs) when compared with (GSHP) systems. However, previous were predominantly focused on advantages parallel-connected HyGSHP systems; detailed analysis quantitative interpretation series-connected not been reported owing to dearth methods available such a configuration. To address this,...
The Korean government is implementing the renewable energy supply obligation (RESO). RESO mandates that systems installed in a new building meet rate (RER) and requires target produces at least certain percentage of its annual consumption through systems. Because this evaluation achieved early design stage construction, it necessary to assess practical RER required operation. In work, case studies were performed using dynamic simulations optimization methodology evaluate RERs whether...