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복사 열저항 제어에 따른 상변화물질 건물 외피의 축열 및 방열 성능 분석
이규배(Gyu Bae Lee),김민성(Min Seong Kim),이재희(Jae Hee Lee),박효림(Hyo Lim Park),정재원(Jae Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
As interest in building energy saving is rising again, research about phase change materials integrated building envelope are being conducted to improve the thermal performance of the building envelope. However, the phase change materials integrated envelope showed defects such as the heat storage and discharge of it cannot be achieved ideally due to interference with the fixed thermal resistance of the members in the envelope. Therefore, in order to solve this problem, a solution that can control the heat transfer of the phase change materials inside the envelope is required. In this study, a system which controls the radiant heat resistance to the phase change materials was proposed using a cavity and emissivity films inside the envelope. The proposed system was numerically simulated by 1d transient heat transfer with reference building envelope systems through a matlab software. Through simulation, the proposed system analyzed that the summer heat gain decreased by 47.2% ~ 56.1% and the winter indoor heat loss decreased by 11.3% ~ 27.3% compared to the reference systems.
이규배(Gyu Bae Lee),정재원(Jae Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
As the importance of ventilation increases, interest in related standards is also increasing. However, the current design standards for ventilation facilities are mixed with design standards for each purpose of the building, and problems such as establishing terms need to be solved. The purpose of this paper is to revise the existing design standard for ventilation facilities by reflecting related domestic and overseas standards. The design standards were revised by combining domestic facility manuals and information such as the American society of heating, refrigerating and air conditioning engineers(ASHRAE). The revised design criteria are outdoor air inlet, outdoor air volume, exhaust and exhaust volume, and air grade directly related to ventilation. The amendments to each standard were described with appropriate examples. The design standards revised in this paper are expected to help standardize ventilation facilities and design engineers in the future.
복사 열저항 제어에 따른 상변화물질 건물 외피의 축열 및 방열 성능 분석
이규배(Gyu Bae Lee),김민성(Min Seong Kim),이재희(Jae Hee Lee),박효림(Hyo Lim Park),정재원(Jae Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
As interest in building energy saving is rising again, research about phase change materials integrated building envelope are being conducted to improve the thermal performance of the building envelope. However, the phase change materials integrated envelope showed defects such as the heat storage and discharge of it cannot be achieved ideally due to interference with the fixed thermal resistance of the members in the envelope. Therefore, in order to solve this problem, a solution that can control the heat transfer of the phase change materials inside the envelope is required. In this study, a system which controls the radiant heat resistance to the phase change materials was proposed using a cavity and emissivity films inside the envelope. The proposed system was numerically simulated by 1d transient heat transfer with reference building envelope systems through a matlab software. Through simulation, the proposed system analyzed that the summer heat gain decreased by 47.2% ~ 56.1% and the winter indoor heat loss decreased by 11.3% ~ 27.3% compared to the reference systems.
복사 열저항 제어에 따른 상변화물질 건물 외피의 축열 및 방열 성능 분석
이규배(Gyu Bae Lee),김민성(Min Seong Kim),이재희(Jae Hee Lee),박효림(Hyo Lim Park),정재원(Jae Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
As interest in building energy saving is rising again, research about phase change materials integrated building envelope are being conducted to improve the thermal performance of the building envelope. However, the phase change materials integrated envelope showed defects such as the heat storage and discharge of it cannot be achieved ideally due to interference with the fixed thermal resistance of the members in the envelope. Therefore, in order to solve this problem, a solution that can control the heat transfer of the phase change materials inside the envelope is required. In this study, a system which controls the radiant heat resistance to the phase change materials was proposed using a cavity and emissivity films inside the envelope. The proposed system was numerically simulated by 1d transient heat transfer with reference building envelope systems through a matlab software. Through simulation, the proposed system analyzed that the summer heat gain decreased by 47.2% ~ 56.1% and the winter indoor heat loss decreased by 11.3% ~ 27.3% compared to the reference systems.
방사율 조정을 통한 상변화물질 기반 건물벽체의 여름철 단열성능 개선
이규배(Lee, Gyu-Bae),정재원(Jeong, Jae-Weon) 한국생태환경건축학회 2021 한국생태환경건축학회 학술발표대회 논문집 Vol.21 No.2
The purpose of this study is to suggest the building wall with the PCM which uses high and low emissivity film for improving the thermal insulation performance during the summer. Each film rotates around the PCM and it used according to its purpose. The low emissivity film reduces the radiant heat from the outer wall to the PCM during the daytime and the high emissivity film helps to discharge the radiant heat from the PCM to the outer wall during the night time. The insulation performance was estimated by a numerical simulation. The results indicated that the proposed system reduced 62.5% and 44.6% of total heat transfer to indoor from outdoor compared with conventional PCM wall and thermal insulation wall.
히트펌프 적용 기반 액체식 제습공조시스템의 용량 매칭 성능 분석
이재희(Jae-Hee Lee),천성용(Seong-Yong Cheon),이규배(Gyu-Bae Lee),권택돈(Taek-Do Kwon),이수진(Soo-Jin Lee),정재원(Jae-Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
In a heat-pump-driven liquid-desiccant (HPLD) air-conditioning system, the release of extra condensing heat while satisfying the target temperature of the regenerator solution is highly important. This study analyzes a capacity-matching performance between the extra condensing load and the maximum thermodynamically possible heat transfer rate of the extra condenser under the various operating parameters. Based on the simulation results, to reduce the extra condensing load and achieve the capacity-matching performance of the extra condenser, the outdoor air and absorber solution temperatures should be decreased. On the other hand, the regenerator air flow-rate and regenerator solution temperature should be increased, and meanwhile, the outdoor air humidity and regenerator solution flow-rate have less influence on the capacity-matching performance.
초음파 미세분사형 액체식 제습 시스템의 재생부 적용 가능성 분석
이수진(Soo-Jin Lee),천성용(Seong-Yong Cheon),이규배(Gyu-Bae Lee),정재원(Jae-Weon Jeong) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
The purpose of this study is to evaluate the applicability of ultrasonic atomization for a regenerator in a liquid desiccant system. To compare the energy consumption under various inlet air and solution temperature, the suitable droplet size of the solution which has high regeneration performance is calculated. The droplet size of the solution is selected from 30 to 100 μm, and the simulation results indicate that the droplet size decreases as the inlet air temperature increases. The results also show that the solution heating is more beneficial than the air heating under the cases showing the similar regeneration performance (i.e., case 1, 6, and 8). Therefore, the high solution temperature to enter the regenerator has energy saving potential to applicate the ultrasonic atomization for a regenerator in a liquid desiccant system although it is hard to use a small droplet size of the solution.