Jae-Weon Jeong’s research while affiliated with Hanyang University and other places

... Nevertheless, conventional photovoltaic (PV) technology typically achieves an overall efficiency of approximately 17-18% in converting solar energy into electricity [4,5]. There has been a trend towards combining photovoltaic panels with thermoelectric generators (TEGs) to enhance solar energy utilization efficiency [6][7][8][9]. TEGs harness temperature differences on both sides to generate electricity, with voltage increasing as the temperature rises. TEG has the potential to convert solar energy at greater than 15% efficiency, and it is an intriguing way to generate renewable energy directly from waste heat. ...

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Development of Steg with Concentrating System

... Drilling costs for BHEs are calculated by taking into account the drillability of the rock and soil. Although the deeper the drilling is, the longer the range of heat exchange can be, and the more heat can be exchanged, considering the performance coefficient and cost input, a reasonable length should be designed in combination with the field heat storage conditions [29]. ...

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Analysis of the Heat Transfer Performance of a Buried Pipe in the Heating Season Based on Field Testing

... Christy and Abimannan[125] estimated the energy consumption of DCs using a conventional cooling system and two free cooling schemes for three different zones and found that the waterside type consistently outperformed the air-side type. Kwon and Jeong[126] evaluated energy savings in a hot and humid region and found that when water-and air-side free cooling was applied, the outdoor air conditioning ...

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Towards Energy-Efficient Data Centers: A Comprehensive Review of Passive and Active Cooling Strategies

... Greenhouses are categorized into open, semi-closed, and closed types [11][12][13]. Open greenhouses often have side vents and are commonly single-span structures, while closed greenhouses are vertical indoor farms. A semi-closed greenhouse has a higher internal pressure compared to the outside and minimizes the intake of external air by using active heating and cooling systems [14]. ...

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Optimal Planting Time for Summer Tomatoes (Lycopersicon esculentum Mill.) Cropping in Korea: Growth, Yield, and Photosynthetic Efficiency in a Semi-Closed Greenhouse

... Similarly, in [18], it was reported that people tested at an elevated temperature of 30 • C assessed the air quality as worse in comparison to a thermal environment of 22 • C. Thus, it is important to consider air quality in a broader sense rather than limiting it to the CO 2 level. It is especially crucial, because indoor environment quality can influence the overall satisfaction of room residents and their productivity, as reported by Lee et al. [19], who also indicated a difference in the indoor air quality perception between different occupations of the same building. The influence of the indoor air quality on occupants' productivity was addressed by Lee et al. [20]. ...

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Comparative Analysis of Indoor Environmental Quality and Self-Reported Productivity in Intelligent and Traditional Buildings

... Traditional paper-based surveys [13,42] capture detailed snapshots, but lack contextual richness. Annual surveys [3,37] focus on topics like wellbeing [36], yet their infrequent nature limits their capacity to capture in-the-moment feedback [14]. Mobile surveys [58] address this by prompting individuals in the moment, which reduces memory bias but raises concerns about notification overload and privacy risks [21,41,45]. ...

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The EnviroMapper Toolkit: an Input Physicalisation that Captures the Situated Experience of Environmental Comfort in Offices

... Axial fans are commonly known as efficient air handling machines that are used in various industries to provide efficient air movement and ventilation. They are also commonly employed in HVAC systems [1,2], industrial heat transfer and air movement systems. Machines with low system resistance and higher mass flow rates can benefit from the geometric design of the axial fan blade, which has an inline air flow direction. ...

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Aerodynamics performance evaluation for new twist angle design axial fan.

... Advanced HVAC systems, including heat pumps and radiant heating, significantly improve energy efficiency and enhance aesthetic appeal, contributing to better thermal comfort [95][96][97][98][99]. Heat pumps are highly efficient, transferring heat for both heating and cooling, which reduces energy consumption and lowers costs. ...

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Beyond Sustainability: The Role of Regenerative Design in Optimizing Indoor Environmental Quality

... Researchers are using survey method in workplace POE studies to collect a wide variety of data from workplace occupants (Bunn & Marjanovic-Halburd, 2017;Candido et al., 2016;Gocer et al., 2018;Hua, 2010;Hua et al., 2010;Hua et al., 2011;Hua et al., 2014;Kim & De Dear, 2012;Lee et al., 2020;Xu et al., 2016). These data sets include: ...

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Surveys

... Internal insulation systems have been commonly applied to apartment buildings in Korea because of easy installation and low construction cost. However, the application of external insulation systems is steadily increasing to achieve energy saving target for building sectors [43]. Therefore, the analysis cases were divided into balcony thermal bridge models with internal and external insulation systems ( Figure 2 and Table 3). ...

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Performance Evaluation of Thermal Bridge Reduction Method for Balcony in Apartment Buildings