Article
Construction & Building Technology
Hyeon Jin Jee, Sang Hun Yeon, Jiwon Park, Yeobeom Yoon, Kwang Ho Lee
Summary: An AI-based real-time prediction and control model was developed to optimize condenser water temperature and discharge air temperature set-points in a water-cooled AHU system. The ANN model, utilizing embedded MATLAB neural network objects, could determine optimal temperature set-points based on outdoor air wet-bulb temperature. Compared to the conventional fixed temperature algorithm, the ANN-based optimized control reduced total cooling energy consumption by 22%.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Alexander Kuempel, Jens Teichmann, Paul Mathis, Dirk Mueller
Summary: This paper presents modular models for hydronic subsystems in air-handling units, which are validated using measured data and shown to have high accuracy for controller testing and tuning.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Jin-Hee Kim, Sang-Myung Kim, Jun-Tae Kim
Summary: PVT systems use waste heat from BIPV modules to provide domestic hot water and space heating, improving solar energy utilization and building energy performance. To optimize the performance of an air-type PVT collector, it is essential to extract more heat from the PV module for enhanced electrical energy generation.
Article
Construction & Building Technology
Yeobeom Yoon, Byeongmo Seo, Soolyeon Cho
Summary: Heating, ventilation, and air-conditioning (HVAC) systems are responsible for about 50% of building energy consumption. It is crucial to explore energy-saving methods and improve HVAC system efficiency. One solution is the use of economizer controls, which can reduce cooling energy usage. However, the effectiveness of different economizer controls may vary depending on the climate conditions.
Article
Thermodynamics
V. Chuwattanakul, K. Wongcharee, M. Pimsarn, S. Chokphoemphun, S. Chamoli, S. Eiamsa-ard
Summary: The effect of conical air distributors on the drying of peppercorns in a fluidized bed dryer was experimentally studied. The results showed that air distributors with specific parameters exhibited better drying performance, and increasing the air velocity accelerated the drying process. Additionally, a neural network model was constructed to predict the moisture content of peppercorns.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Automation & Control Systems
Viet Tra, Manar Amayri, Nizar Bouguila
Summary: Incomplete data is a common problem in data-driven energy and building solutions. This paper proposes a new framework called DV-MPPCA to address the fault detection problem in buildings with incomplete data. The framework combines a variational autoencoder (VAE) for data compression and a mixture of principal component analyzers (MPPCA) for density estimation. Experimental results demonstrate the exceptional performance of DV-MPPCA, even with high missing rates.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Proceedings Paper
Green & Sustainable Science & Technology
Tae Young Kim, Jong Man Lee, Sung Hyup Hong, Jong Min Choi, Kwang Ho Lee
Summary: This study developed an artificial neural network-based real-time predictive control and optimization model to compare the difference in total energy consumption between fixed and real-time control of condenser water outlet temperature. The ANN model accuracy was examined using Cv(RNISE) and found to have a value of approximately 25%. Additionally, the predictive control algorithm reduced cooling energy consumption by about 5.6% compared to conventional control strategies.
PROCEEDINGS OF THE ASME 2021 15TH INTERNATIONAL CONFERENCE ON ENERGY SUSTAINABILITY (ES2021)
(2021)
Article
Engineering, Environmental
Mohammad A. Hamdan, Mohammad F. Bani Ata, Ahmad H. Sakhrieh
Summary: The study utilized a NARX model to forecast the daily average levels of pollutants in Amman, Jordan. The results showed good performance in forecasting SO2, O-3, CO, and NO2, and acceptable performance for PM10 at the given locations.
JOURNAL OF ECOLOGICAL ENGINEERING
(2021)
Article
Energy & Fuels
Aicha Eddemani, Lahcen Bammou, Rachid Tiskatine, Ahmed Aharoune, Lahcen Bouirden, Ahmed Ihlal
Summary: This study investigates the thermal behavior and performance of a thermal energy storage system using air and a bed of rocks. A transient two-phase numerical model was developed and validated with experimental data. The effects of mass flow rate and consecutive thermal cycles on the system performance were studied in detail. The results help to understand the thermal behavior and evaluate the system's performance during the discharge process.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Article
Construction & Building Technology
Byeong Mo Seo, Kwang Ho Lee
ENERGY AND BUILDINGS
(2016)
Article
Construction & Building Technology
Byeong Ho Yu, Byeong-Mo Seo, Sung Hyup Hong, Sanghun Yeon, Kwang Ho Lee
ENERGY AND BUILDINGS
(2018)
Article
Construction & Building Technology
Min Ji Kim, Byeong Mo Seo, Jong Man Lee, Jong Min Choi, Kwang Ho Lee
ENERGY AND BUILDINGS
(2018)
Article
Energy & Fuels
Da Young Lee, Byeong Mo Seo, Yeo Beom Yoon, Sung Hyup Hong, Jong Min Choi, Kwang Ho Lee
FRONTIERS IN ENERGY
(2019)
Article
Energy & Fuels
Sanghun Yeon, Byeongho Yu, Byeongmo Seo, Yeobeom Yoon, Kwang Ho Lee
Article
Thermodynamics
Da Young Lee, Byeong Mo Seo, Sung Hyup Hong, Jong Min Choi, Kwang Ho Lee
Article
Construction & Building Technology
Yeo Beom Yoon, Byeongmo Seo, Brian Baewon Koh, Soolyeon Cho
JOURNAL OF BUILDING ENGINEERING
(2019)
Article
Thermodynamics
Byeongmo Seo, Yeo Beom Yoon, Byeong Ho Yu, Soolyeon Cho, Kwang Ho Lee
APPLIED THERMAL ENGINEERING
(2020)
Article
Energy & Fuels
Byeongmo Seo, Yeo Beom Yoon, Jung Hyun Mun, Soolyeon Cho
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)