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임한솔(Hansol Lim),리쓰잉(Shiying Li),천성용(Seong-Yong Cheon),변유석(Yoo-Suk Byon),정재원(Jae-Weon Jeong) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This paper proposes a thermoelectric module radiant cooling panel (TEM-RCP) and its desirable arrangement of thermoelectric modules (TEMs) for uniform temperature distribution. The design methods for the TME-RCP was developed based on the semi-black box model of TEM and the two-dimensional finite difference method. A mock-up model of the TEM-RCP was constructed to verify the proposed model and results. The constructed TEM-RCP consists of seven TEMs, an aluminum panel, a heat sink attached to the TEMs, air duct and fan for heat rejection. The TEM is a solid state heat pump operated by direct current based on the Peltier effect. When the panel temperature at the aluminum radiant panel was maintained at 16°C during operation, the heat rejection was occurred at the hot side of TEM and it was removed using forced convection by outside air. The main design factor in this study was the panel temperature distribution. Therefore, the suitable arrangement and interval between TEMs were investigated not to exceed the maximum temperature difference of 3°C across a given grid. As a result, the triangular grid was found as the best grid for an uniform temperature distribution of the TEM-RCP. The optimal interval between the TEMs was 0.2 m to 0.3 m according to the room condition and operation characteristics of the TEM. The optimized results were validated through experiments using the mock-up model of TEM-RCP.
의부전록(醫部全錄)과 동의보감(東醫寶鑑)에 제시된 한의학적 요통(腰痛) 분류(分類)에 대한 소고(小考)
임한솔 ( Lim Hansol ),남동현 ( Nam Donghyun ) 대한한의진단학회 2015 大韓韓醫診斷學會誌 Vol.19 No.3
Objectives The purpose of this study is to understand formation courses of the ten types of LBP (十種腰痛) in Korean medicine through reviewing classic literatures. Methods We summarized sentences describing syndrome differentiation of LBP directly in Uibujeonrok (醫部全錄) and Donguibogam (東醫寶鑑), and then organized similarities and differences among diagnostic factors described in the classic literatures. Results In most of the classics LBP was classified according to the cause but the causes varied depending on the classic literatures. Cheonkeumbang (千金方) tried to suggest a reasonable classification of LBP in a relatively early age. In Dangyesimbeop (丹溪心法) the causes of LBP were divided into 6 factors; qi movement stagnation (氣鬱), dampness-heat (濕熱), kidney deficiency (腎虛), static blood (瘀血), sprain (挫閃) and phlegm accumulation (積痰). It had a lot of influence on the classic literatures published later. Donguibogam was also influenced by the Dangyesimbeop and the ten types of LBP in Donguibogam was similar to the information on the classification shown in Uihakipmun (醫學入門) and Uijongpildok (醫宗必讀). Conclusions We verified universality of the ten types of LBP; kidney deficiency, phlegm-retained fluid (痰飮), food accumulation (食積), sprain, static blood, wind (風), cold (寒), dampness (濕), dampness-heat and qi (氣).
연료전지 연계 제습환기시스템의 업무용도 건물 리모델링 적용 시 에너지 성능 시뮬레이션 평가
임한솔(Hansol Lim),천성용(Seong-Yong Cheon),조혜진(Hye-Jin Cho),정재원(Jae-Weon Jeong),Yuehong Su 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
This study aims to evaluate the energy saving potential of a fuel cell integrated thermoelectric heat pump and liquid desiccant assisted dedicated outdoor air system (TELDOAS) for building energy retrofit via detailed energy simulations. The target building is general public office building, and the reference system is enthalpy recovery ventilator with electric heat pump (EHP) with a humidifier for air conditioning. For a detailed energy simulation, all the simulation models of each component based on the mathematical and empirical models were integrated using MATLAB, and simulation was conducted in hourly progress. As a result, proposed system can save 49% of annual operation energy by using TELDOAS instead of ERV and steam humidifier except the generated electricity from fuel cell. It can be achieved by efficiently reclaiming the waste heat from fuel cell.
Heat pump를 적용한 액체식 제습 시스템의 겨울철 가습 운전에 대한 실험적 연구
임한솔(Hansol Lim),이수진(Soo-Jin Lee),동혜원(Hye-Won Dong),조혜진(Hye-Jin Cho),정재원(Jae-Weon Jeong) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
The performance of regenerator in heat pump integrated liquid desiccant (LD) system was investigated for the operation in winter. The performance parameters for regenerator were the regeneration effectiveness and enthalpy exchange effectiveness. There were five independent parameters of inlet air temperature, inlet air humidity ratio, inlet solution temperature, concentration of solution and liquid-to-gas ratio. The experimental model was constructed using an adiabatic cross flow regenerator with lithium chloride solution. Based on 2<SUP>k</SUP> and 3<SUP>k</SUP> factorial design method, total 48 experiment sets were designed to develop prediction models for two performance parameters. The results showed that the solution temperature and liquit-to-gas ratio have significant effects on the regeneration effectiveness and enthalpy exchange effectiveness of regenerator. In addition, the amount of humidification was ranged from 3.23 g/㎏a to 51.18 g/㎏a, therefore it was enough for humidification system in winter.
상변화 물질 통합 조명기구의 냉방 에너지 저감 효과 분석
임한솔(Hansol Lim),이현화(Hyun Hwa Lee),최경석(Gyeong-Seok Choi),이용준(Yong-Jun Lee),강재식(Jae-Sik Kang) 한국생활환경학회 2021 한국생활환경학회지 Vol.28 No.1
The phase chase material (PCM) integrated lighting fixture is suggested to reduce the heat from lightings in the building by inserting PCM in a cover of lighting. Thereby, the heat from the lightings expects to be absorbed to the PCM during the working time and rejected during the night time without occupants. The thermal performance of PCM integrated lighting fixture has been estimated using Physibel Voltra which provides three-dimensional transient heat transfer analysis. The results shows that it can successfully decrease the surface temperature of lighting about 2℃ and reduce the heating load within averaged 47%. Based on the analyzed results, the detail energy simulation has been performed using theoretical equations and empirical models from the Energyplus to evaluate the energy saving potential of PCM-integrated lighting fixture during the cooling season. The target building is normal office building with the variable air volume (VAV) system for air conditioning and ventilation. As results, the 5.8% of energy savings is expected from the chiller, pump and fan by using PCM-integrated lighting fixture. In addition, it can be expected that if the heating loads from lightings could be more decreased up to 10% by improving heat transfers of PCM layers, the energy consumption could be saved maximum 13.2% during the cooling season.
NeRF기반 디지털 트윈 환경의 심리스 3D 장면 제어
임한솔(Hansol Lim),최종성(Jongseong Choi) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
This paper introduces a method for achieving seamless 3D scene through NeRF generated Digital Twin environment and its implementation in Unity. NeRF (Neural Radiance Fields), a specialized neural network technique, is used to create a photorealistic Digital Twin from sparse point cloud data. This data is derived from Structure-from-Motion environmental images. The NeRF Digital Twin is subsequently exported to Unity to be rendered in a virtual environment in real-time, which is then displayed on a screen. The proposed methodology utilizes camera geometry and world coordinate transformations to create a control system that dynamically aligns the virtual environment to the user’s perspective for a seamless 3D view without a use of a VR gear. The screen displays the synthesized 3D view aligned to the user’s perspective. The proposed approach offers a practical solution for creating a view-through effect on a screen, without the use of glass or mirrors and future-proof structures for mixed reality applications.
열전소자를 결합한 액체식 제습시스템의 에너지 소비특성 분석
임한솔(Hansol Lim),동혜원(Hye-Won Dong),천성용(Seongyong Cheon),신장훈(Janghoon Shin),정재원(Jae-Weon Jeong) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
This study suggested the design of thermoelectric modules (TEMs) integrated into liquid desiccant (LD) system with the analysis of energy potential. Two configurations for LD system were proposed so as to evaluate the applicability of TEMs in the LD system. In the first case, TEMs accommodate the whole solution heating loads and part of solution cooling loads with auxiliary chiller (i.e. Case A). In second case, only TEMs were used for cooling and heating loads of solution with water-cooled unit at the hot side (i.e. Case B). The energy simulation was conducted for each case to estimate the energy consumption and COP with temperature variation of solution. Results showed that the case A provides averaged 2 % of energy saving compared with the conventional LD system, while there is no benefit of energy saving in case B. However, it was proved that the possibility of applying TEMs in the LD system for simplifying the system and not using refrigerant.