國立臺南大學專任教師基本資料
姓名李宜庭
系所綠色能源科技學系
校內分機7911
EMAILytlee@mail.nutn.edu.tw
辦公室ZA105
網址 
專長/研究領域1.計算流體力學之工程應用 2.熱流應用 3.電子元件熱傳分析 4.兩相熱對流與質傳分析
學位畢業學校國別主修學門修業期間
博士國立台北科技大學 能源與冷凍空調工程系 
服務機關部門系所職稱服務期間
國立台北科技大學能源與冷凍空調工程系研究助理教授110.01-111.01
著作名稱:Effects of urban tree planting on thermal comfort and air quality in the street canyon in a subtropical climate
年度:2023
類別: 期刊論文 Sustainable Cities and Society
摘要:Planting trees is considered to relieve the thermal load. However, trees may "pollute" the air quality. Tree net effects should receive more attention, but only a few studies have simultaneously addressed thermal comfort and air quality. By computational fluid dynamics (CFD) simulations, we created an evaluation model of trees and investigated the overall effects of tree planting inside street canyons. We considered the following four parameters by comparing seven common tree species in Hong Kong (subtropical climate): three tree morphological indicators (leaf area index (LAI), tree height (Htree), and crown spread (Scrown)) and tree planting density (Ptree). The results demonstrated that under a high ambient wind speed, higher trees with a lower near-ground leaf area density are better options, which more greatly reduces the physiological equivalent temperature (PET) by up to 1.1 K but causes the least pollutant accumulation. Bigger-crown trees on the windward side are advocated, while smaller ones are suitable for the leeward side. In such a way, there was at least a 0.7 K decrease in PET on the tree-planted side while maintaining better air quality. Thermal comfort can be improved by increasing LAI or Ptree, but a higher LAI or Ptree causes a greater accumulation of pollutants. Increasing Ptree can cause a 1.1 K reduction in PET, while the effect of changing LAI is relatively limited. When the length of a street is reduced, varying tree factors have a comparable effect. As canyon depth increases, the effect of trees is limited.
關鍵字:Air quality, Outdoor thermal comfort, Computational fluid dynamics, Tree planting, Urban design
著作名稱:Numerical and experimental investigations on thermal management for data center with cold aisle containment configuration
年度:2022
類別: 期刊論文 Applied Energy
摘要:This study proposes the container data center with the featured cold aisle containment (CAC) as effective thermal control strategy. In design, the overhead downward flow system is implemented with a heat exchanger arranged right above the data center on the air side and an evaporative water chiller on the water side to form the cooling approach. The cold airflows and hot exhausts of racks are separately transported by the contained cold and hot aisles to alleviate the problem of cold and hot air mixing. The measurements of air temperature and velocity of racks are used to validate the prediction accuracy of the computational fluid dynamics (CFD) model. The performance metrics in terms of the rack cooling index (RCI), return temperature index (RTI), supply heat index (SHI) are used to examine the design effectiveness of the proposed test data center. The simulations are then extended to assess the air distribution and thermal management at varied supply air temperatures and velocities for a large-scale data center to be built in the green energy technology demonstration site of the Shalun smart green energy science city. Overall, the calculated average PUE of 1.38 for the large-scale data center is notably less than the average PUE of 1.59 from the results of 2020 data center industry survey, indicating the potential savings of cooling energy and cost. This paper demonstrates a generalized approach as an easily adaptable, cost-effective solution for data centers to be deployed in tropical and subtropical areas.
關鍵字:Data centerAirflow managementRack cooling indexReturn temperature indexSupply heat indexCFD simulation
著作名稱:Air side performance characterization of wavy Fin-and-tube heat exchangers having elliptic tubes with large waffle heights
年度:2022
類別: 期刊論文 Applied Thermal Engineering
摘要:Demand of less energy consumption and higher energy efficiency suggests increasing heat transfer performance of a fin-and-tube heat exchanger. This paper experimentally and numerically examines the air side performance of wavy fin-and-tube heat exchangers (FTHXs) with elliptic tubes. In a properly regulated and evenly distributed airflow supply loop, the inlet/outlet temperatures and pressure drops across the test section are obtained using two measuring meshes and a differential pressure transducer to resolve thermal and frictional outcomes in terms of the heat transfer coefficient and pressure drop. The theoretical formulation considers the thermo-fluid analysis of crossing airflows over the wavy finned tube heat exchanger. In this research, the test heat exchanger contains elliptic tubes incorporated with 4-row wavy fins, while the proposed design adopts a large setting of 3.24-mm waffle height and 3.02-mm fin pitch, respectively. The predicted heat transfer coefficients and pressure drops are in good agreement with the measured data at varied inlet air velocities to validate the CFD model. Numerical simulations are then extended to investigate the influences of waffle height, fin pitch, wave length and inlet air velocity on thermofluid characteristics of FTHXs. Six common correlations of Colburn factors (j) and friction factor (f) factors are compared with predictions to evaluate their applicabilities for reasonable estimates of thermal and frictional performance of FTHXs. It is noticed that the correlation by Wang et al. can achieve the most accurate results in calculating the j and f factors.
關鍵字:Fin-and-tube heat exchangerAir side performanceHeat transferElliptic tubeCFD Simulation
著作名稱:Characterization of Melting Process of PCM in Cold Thermal Energy Storage Tanks with Varied Fin Configuration
年度:2022
類別: 會議論文
摘要:Cold thermal energy storage (CTES) is of enormous significance for the continuing reduction in fossil energy utilization. Moreover, CTES with phase change materials (PCMs) can be a crucial solution to solve the disparity between the supply and demand of energy. This paper numerically investigates the melt enhancement of PCM in a CTES unit through the installation of internal fins. To validate the computational model, the predictions of time sequences of liquid fraction contours of PCM agree reasonably well with the visualized images inside the CTES tank. The effect of fins on the melt progression is then examined. The CFD results indicate that the installation of fins can enlarge heat transfer areas to enhance conductive heat transfer for positively accelerating the PCM melt event. The melting time for the scenario with fins is 38.4% faster than that without fins.
關鍵字:Cold Thermal energy storage (CTES), Phase change material (PCM), CFD simulation