• Title/Summary/Keyword: energy simulation

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Existing Building Energy Simulation Method Using Calibrated Model by Energy Audit Data (성능진단 데이터로 보정된 모델을 이용한 기존건축물의 에너지시뮬레이션 기법)

  • Kong, Dong-Seok;Kim, Du-Hwan;Chang, Yong-Sung;Huh, Jung-Ho
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.26 no.5
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    • pp.231-239
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    • 2014
  • This paper represents a method of existing building energy simulation using energy audit data. Energy audit must be carried out for reasonable analysis, because characteristics of existing buildings such as efficiency of fan, pump, flow rate, pressure, COP and operating schedule could be changed during the building operation. These building characteristics should be measured to estimate actual energy consumption of the existing building. In this study, we conducted energy audit and calculated energy savings for a 7-stories building as a case-study. The energy audit data were used to calibrate the building model of EnergyPlus simulation. Baseline model validated according to M&V guideline index. As a result, building characteristics are significant parameters making a big impact on energy savings in existing buildings.

Literature review of technologies and energy feedback measures impacting on the reduction of building energy consumption (건물에너지 사용 저감을 위한 에너지 피드백에 관한 기초연구)

  • Lee, Eun-Ju;Pae, Min-Ho;Jang, Ji-Hyeon;Kim, Dong-Ho;Kim, Jae-Min;Kim, Jong-Yeob
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.813-818
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    • 2008
  • In order to reduce energy consumption, this study presents a way to energy reduction through energy-feedback which enables a household to self-recognize the need for energy reduction and respond to. The effect of this energy-feedback has been reported as $10{\sim}15%$ in average, and been actively investigated in abroad from 1970's while study in korea has been in its first step. In this study, examination on the cases of abroad study is made as it shows the effectiveness and applicability of energy feedback. And paradigms to consider for application to korea will be suggested anticipating the change of actions through energy feedback.

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A Review of Greenhouse Energy Management by Using Building Energy Simulation (BES 프로그램을 이용한 온실의 에너지 관리)

  • Rasheed, Adnan;Lee, Jong Won;Lee, Hyun Woo
    • Journal of Bio-Environment Control
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    • v.24 no.4
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    • pp.317-325
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    • 2015
  • This paper attempts to present a review about simulation of different greenhouse parameters and energy supplying techniques by using building energy simulation, to find out the optimal solution for keeping greenhouse microclimate favorable for the crop production. The objectives of conducting this study were, to describe the various energy systems and techniques used for the greenhouse energy management and efficiency analysis of these technologies by using building energy simulation. We describe different models to understand the behavior of the energy saving technologies with respect to the resources available and different outside climatic conditions. We identified main features of the building energy simulation software, that enable users, to simulate hybrid agricultural building projects by using user defined parameters. At the end of the paper we draw some important concluding remarks on the basis of reviewing all the investigators contributions for the developments of simulation model of agricultural greenhouse energy management, using a building energy simulation software specifically TRNSYS. In conclusion, this paper provides information that TRNSYS have great potential for agricultural buildings energy simulation along with the renewable energy resources and energy saving techniques. This review paper provides aid to greenhouse researcher and energy planner for the future studies of greenhouses energy planning.

Energy Performance Evaluation of a New Commercial Building using Calibrated As-built Simulation with Monitoring Data (건물에너지 모니터링 및 시뮬레이션을 활용한 신축건물의 에너지성능평가)

  • Song, Su-Won
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.20 no.3
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    • pp.155-166
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    • 2008
  • The performance evaluation of a new building is becoming more important because efficient design alone is often not sufficient to deliver an efficient building. However, there is a lack of standard evaluation methods to measure the energy performance of a new construction that has Energy Conservation Design Measures(ECDMs). This study presents an enhanced method based on calibrated whole-building simulation for evaluating the energy performance of new commercial buildings and demonstrates its use using a case-study building, including: an Energy Use Index(EUI) comparison with sub-metered data and an evaluation of the performance of specific ECDMs. The use of this method has determined that the case-study building was shown to use approximately 47% less energy than the base-case building that has the same shape and function as the case-study building(i.e., calibrated as-built simulation mode]), but doesn't include the simulated ECDMs.

Generation of a adaptive tetrahedral refinement mesh for GaAs full band monte carlo simulation (풀밴드 GaAs monte carlo 시뮬레이션을 위한 최적사면체격자의 발생)

  • 정학기
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.34D no.7
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    • pp.37-44
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    • 1997
  • A dadaptive refinement tetrahedron mesh has been presented for using in full band GaAs monte carlo simulation. A uniform tetrahedron mesh is used without regard to energy values and energy variety in case of the past full band simulation. For the uniform tetrahedron mesh, a fine tetrahedron is demanded for keeping up accuracy of calculation in the low energy region such as .GAMMA.-valley, but calculation time is vast due to usin gthe same tetrahedron in the high energy region. The mesh of this study, thererfore, is consisted of the fine mesh in the low energy and large variable energy region and rough mesh n the high energy. The density of states (DOS) calculated with this mesh is compared with the one of the uniform mesh. The DOS of this mesh is improved th efive times or so in root mean square error and the ten times in the correlation coefficient than the one of a uniform mesh. This refinement mesh, therefore, can be used a sthe basic mesh for the full band GaAs monte carlo simulation.

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A Study on the Energy Performance Renovation for the Sustainable the Residential Houses (친환경주거단지를 위한 에너지 성능개선에 관한 연구)

  • Park, Jin-Chul;Kim, Ki-Hoon;Song, Gook-Sup;Lee, Hyun-Woo
    • Journal of the Korean Solar Energy Society
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    • v.23 no.4
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    • pp.89-96
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    • 2003
  • In planning a building retrofit, energy conservation, thermal comfort and economic benefits should be considered. In this study, retrofit effects of exterior insulating method on preventing condensation, saving energy were analyzed through the heat transfer simulation, energy simulation in the apartment house retrofitted by exterior insulating method cheaper than other retrofit methods. The results of this study show that the retrofit using exterior insulating method can prevent the condensation at the corner walls and save about 20% of annual heating load. The LCC analysis revealed to be effective to select a dryvit system for a building retrofit.

A Study on the Field Test and Simulation of Active Solar System for Residential House (설비형 태양열 주택 실증시험 및 시뮬레이션 연구)

  • Baeck, N.C.;Yu, J.Y.;Yoon, E.S.;Lee, D.W.;Joo, M.C.
    • Journal of the Korean Solar Energy Society
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    • v.21 no.1
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    • pp.93-101
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    • 2001
  • The solar space and water heating system for residential house was analyzed by both experiment and computer simulation. Computer simulation program is developed using TRNSYS 14.2 verified by experimental result. The Parametric study of this solar system was carried out using this computer simulation program. On-OFF control strategy, collector area and storage tank volume as a parameters were considered in this study.

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Assessment of Distributed and Dynamic Potential of Photovoltaic Systems in Urban Areas (태양광 발전 시스템의 시공간적 잠재성 평가 소프트웨어 개발)

  • Choi, Yosoon
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.59.2-59.2
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    • 2011
  • This study presents a new method for coupling ArcGIS (popular GIS software) with TRaNsient SYstems Simulation (TRNSYS, reference software for researchers and engineers around the world) to use capabilities of the 4 and 5-parameter PV array performance models within the ArcGIS environment. Using the validated and industry-proven solar energy simulation models implemented in TRNSYS and other built-in ArcGIS functionalities, dynamic characteristics of distributed PV potential in terms of hourly, daily or monthly power outputs can be investigated with considerations of diverse options in selecting and mounting PV panels. In addition, the proposed method allows users to complete entire procedures in a single framework (i.e., a preliminary site survey using 3D building models, shading analyses to investigate usable rooftop areas with considerations of different sizes and shapes of buildings, dynamic energy simulation to examine the performances of various PV systems, visualization of the simulation results to understand spatially and temporally distributed patterns of PV potential). Therefore tedious tasks for data conversion among multiple softwares can be significantly reduced or eliminated. While the programming environment of TRNSYS is proprietary, the redistributable executable, simulation kernel and simulation engine of TRNSYS can be freely distributed to end-users. Therefore, GIS users who do not have a license of TRNSYS can also use the functionalities of solar energy simulation models within ArcGIS.

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The development of module for automatic extraction and database construction of BIM based shape-information reconstructed on spatial information (공간정보를 중심으로 재구성한 BIM 기반 형상정보의 자동추출 및 데이터베이스 구축 모듈 개발)

  • Choi, Jun-Woo;Kim, Shin;Song, Young-hak;Park, Kyung-Soon
    • Journal of the Regional Association of Architectural Institute of Korea
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    • v.20 no.6
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    • pp.81-87
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    • 2018
  • In this paper, in order to maximize the input process efficiency of the building energy simulation field, the authors developed the automatic extraction module of spatial information based BIM geometry information. Existing research or software extracts geometry information based on object information, but it can not be used in the field of energy simulation because it is inconsistent with the geometry information of the object constituting the thermal zone of the actual building model. Especially, IFC-based geometry information extraction module is needed to link with other architectural fields from the viewpoint of reuse of building information. The study method is as follows. (1) Grasp the category and attribute information to be extracted for energy simulation and Analyze the IFC structure based on spatial information (2) Design the algorithm for extracting and reprocessing information for energy simulation from IFC file (use programming language Phython) (3) Develop the module that generates a geometry information database based on spatial information using reprocessed information (4) Verify the accuracy of the development module. In this paper, the reprocessed information can be directly used for energy simulation and it can be widely used regardless of the kind of energy simulation software because it is provided in database format. Therefore, it is expected that the energy simulation process efficiency in actual practice can be maximized.