Article
Construction & Building Technology
Iman Rahgozar Abadi, Behzad Aminian, Mohammad Rafati Nasr, Ryan Huizing, Sheldon Green, Steven Rogak
Summary: Membrane-based Energy Recovery Ventilators (ERV) play an important role in modern ventilation systems. In winter conditions, condensation and frost formation can occur when using ERVs. This study experimentally investigates the impact of condensation on pressure drop and effectiveness of an ERV. The results show that condensation increases the sensible effectiveness of the supply side, decreases the sensible effectiveness of the exhaust side, and increases the latent effectiveness of both air streams.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Jinyoung Ko, Junseok Park, Jae-Weon Jeong
Summary: This study evaluates the energy-saving potential of a prediction model-based pre-heat coil operation method for frost prevention in energy recovery ventilators, compared to existing approaches. The proposed method consumed 7%-72% less energy in the ERV operation and required a 1%-21% smaller pre-heat coil capacity than the conventional method. The new method is superior to the conventional one as it prevents frost formation and consumes a minimal amount of energy.
APPLIED THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Gamal B. Abdelaziz, M. A. Abdelbaky, M. A. Halim, M. E. Omara, I. A. Elkhaldy, A. S. Abdullah, Z. M. Omara, F. A. Essa, Aml Ali, Swellam W. Sharshir, Emad M. S. El-Said, Ahmed G. Bedair, A. E. Kabeel
Summary: This study conducted an experimental analysis on energy saving in air conditioning application using Heat Pipe Heat Exchanger (HPHX). The results showed an increase in heat transfer effectiveness with higher fresh air inlet temperature, ratio between return and fresh air mass flow rate, and heat pipe diameter. Energy reduction of about 30% was achieved with the insertion of a wickless HPHX in the system, with a payback period of about three years and a lifetime of around 20 years.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Ali Mirzazade Akbarpoor, Amin Haghighi Poshtiri, Faraz Biglari
Summary: The study investigated an integrated cooling system consisting of an earth-to-air heat exchanger (EAHE) and a domed roof to provide thermal comfort and cooling demand for a building. Numerical simulations and experimental studies were conducted to assess system performance, showing significant energy savings and reduced CO2 emissions compared to traditional cooling systems. The integrated system demonstrated the ability to efficiently provide thermal comfort for different building types while minimizing environmental impact.
Article
Construction & Building Technology
Peng Liu, Maria Justo Alonso, Hans Martin Mathisen
Summary: Improving insulation and airtightness in buildings reduces heat losses, but ventilation energy use remains a significant concern. This study highlights the impact of longitudinal heat conduction on the efficiency of rotary heat exchangers in ventilation systems, particularly in demand-controlled ventilation. Neglecting the longitudinal heat conduction effect can lead to higher energy consumption for heating ventilation air, emphasizing the need for careful design considerations.
BUILDING AND ENVIRONMENT
(2022)
Article
Thermodynamics
Neda Asasian-Kolur, Seyedmehdi Sharifian, Bahram Haddadi, Mohammad Pourhoseinian, Zahra Mousazadeh Shekarbaghani, Michael Harasek
Summary: This study investigates various factors affecting the non-isothermal performance of gas-to-gas membrane heat exchangers, including membrane core type, moisture transfer mechanisms, module geometry, etc. It also explores ways to increase sensible and latent heat recovery efficiency and the wide application of these devices in ventilation systems under different climate conditions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Beata Galiszewska, Ewa Zender-Swiercz
Summary: A study was conducted to investigate heat recovery in a facade ventilation unit under laboratory conditions. Three types of heat exchangers filled with different phase change materials were tested to assess the unit's heat recovery efficiency. The best efficiency of 73.56% to 76.29% was achieved with a one-minute cycle using a heat exchanger consisting of cylinders filled with jojoba oil. This study provides additional scientific knowledge on the efficiency of phase change material-filled heat exchangers in winter conditions.
Article
Energy & Fuels
Peng Liu, Maria Justo Alonso, Hans Martin Mathisen
Summary: Energy-efficient building services are crucial for achieving zero-emission buildings while maintaining indoor environmental quality. Heat recovery in mechanical ventilation systems is an efficient approach to reduce heat losses and save energy. However, practical operating conditions and constraints of heat recovery have been less considered, and the design parameters that have the greatest impact on energy savings are unclear. This study proposes models that consider ventilation rate variations, heat conduction effects, and operating controls to analyze the annual efficiency and net energy savings of heat recovery ventilation. The results of this study can provide guidance for the design process and the optimization of heat recovery devices.
Article
Construction & Building Technology
Arnaud Lapertot, Mathias Cuny, Benjamin Kadoch, Olivier Le Metayer
Summary: The Earth-Air Heat Exchanger (EAHE) system uses air ventilation to preheat or cool buildings, with inputs including sizing parameters and meteorological data, and outputs comprising energy and economic criteria. Through sensitivity analysis and multi-criteria optimization study, the most significant influencing variables and optimal sizing adjustments are determined.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Andrzej Jedlikowski, Maciej Skrzycki, Paulina Kanas, Sergey Anisimov
Summary: This paper presents the heat and mass transfer process in a fixed-bed heat exchanger, using a mathematical model and experimental data to verify its accuracy. The study shows that internal air leaks have an impact on the performance of the heat exchanger, especially at sub-zero temperatures. Various irregularities were observed through numerical simulations under low outdoor air temperature conditions. The effectiveness of the device was found to be influenced by different thermodynamic air parameters, with the maximum increase in effectiveness attributed to the condensation of water vapor and the accumulation of wet area. Additionally, the accumulation of frost area decreased as the relative humidity of the return air increased, and a transformation from frost area to wet zone was observed beyond a certain limiting return air relative humidity. A significant change in device effectiveness was noticeable when the relative humidity of the return exceeded 30%, as indicated by the maximum size of the frost area. (c) 2022 Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Construction & Building Technology
Reyhaneh Nazmabadi, Behrad Asgari, Ali Hakkaki-Fard
Summary: This study proposes a thermal recovery system for energy piles, which circulates ambient air to extract accumulated heat and improve the performance of the piles. A computational fluid dynamics model is developed to investigate the effect of design parameters and determine the optimum system parameters.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
Tugce Pekdogan, Ayca Tokuc, Mehmet Akif Ezan, Tahsin Basaran
Summary: Indoor air quality is crucial for health and work performance, leading to the widespread use of mechanical ventilation systems. Experimental research on a wall-integrated ventilation system showed that 2 minutes of operation time provided the best thermal performance with the least energy consumption.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Haibin Wei, Dong Yang, Jinhui Du, Xin Guo
Summary: The earth-to-air heat exchanger (EAHE) technology can significantly reduce building energy consumption. In hot-summer and cold-winter regions, EAHE can effectively lower outdoor air temperature and humidity, improve performance coefficients, and reduce building cooling and heating loads.
Article
Multidisciplinary Sciences
Nghia-Huu Nguyen, Dong-Yeon Lee, Kunal Sandip Garud, Moo-Yeon Lee
Summary: This study investigates the energy savings and economics of a hot water supply system for a luxury resort, utilizing waste heat from the exhaust gas heat of an internal combustion engine. The proposed system can meet the resort's hot water demand, achieve fuel savings, and have a payback period of 9 months. It demonstrates the potential of energy savings and efficient hot water supply by utilizing exhaust gas heat.
Article
Construction & Building Technology
Martin Rodriguez-Vazquez, Ivan Hernandez-Perez, Irving Hernandez-Lopez, Yvonne Chavez, Carlos M. Jimenez-Xaman, Luis A. Baltazar-Tadeo, Alfredo Aranda-Arizmendi
Summary: This study focused on using Earth-to-Air Heat Exchanger (EAHE) to refurbish social interest buildings in representative dry climatic conditions of Mexico. The influence of EAHE on indoor conditions was analyzed using computational fluid dynamics (CFD) and building energy simulation (BES). The results showed that EAHE can reduce indoor air temperature by 1.7-3.2 degrees C on warm days and increase it by 1.0-1.9 degrees C on cold days. Additionally, daily cooling load was reduced by 2-6% and daily heating load by 0.3-11% with the use of EAHE.
Article
Construction & Building Technology
N. A. Buyak, V. I. Deshko, I. O. Sukhodub
ENERGY AND BUILDINGS
(2017)
Article
Chemistry, Physical
Marta Cabello, Taras Chyrka, Rafael Klee, Maria J. Aragon, Xue Bai, Pedro Lavela, Gennadiy M. Vasylchenko, Ricardo Alcantara, Jose L. Tirado, Gregorio F. Ortiz
JOURNAL OF POWER SOURCES
(2017)
Article
Construction & Building Technology
Valerii Deshko, Inna Bilous, Iryna Sukhodub, Olena Yatsenko
Summary: This study shows that in a typical Ukrainian apartment, scheduled ventilation approach can reduce energy consumption more effectively compared to fixed air exchange rate approach. Scheduled ventilation reduces energy use by about 25% on weekends and increases energy use by about 50% on weekdays, depending on the air change rates during occupancy and outdoor temperature at night. Efficient ventilation approach is scheduled with increased flow rate during occupied hours for better indoor air quality.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Environmental Sciences
Valeri. Deshko, Inna Bilous, Oleksandra Maksymenko
Summary: Improving the energy efficiency of residential buildings can be achieved by enhancing the thermal protection characteristics and implementing control tools. This study investigates the regulation of heating distribution in a single-pipe system with bypassed heating devices in a typical 5-storey building in Ukraine after thermos-modernisation, considering the specific operating conditions in Kyiv and Warsaw.
ROCZNIK OCHRONA SRODOWISKA
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Valerii Deshko, Inna Bilous, Iryna Sukhodub, Nadia Buyak, Tetyana Boiko
Summary: This paper presents a comparative analysis of the application of photovoltaic system simulation on different software products, using the educational building of Igor Sikorsky Kyiv Polytechnic Institute as an example. The study analyzes the specifics of using various software products under design conditions, compares the results, and determines the tasks where they can be applied.
2022 IEEE 63TH INTERNATIONAL SCIENTIFIC CONFERENCE ON POWER AND ELECTRICAL ENGINEERING OF RIGA TECHNICAL UNIVERSITY (RTUCON)
(2022)
Article
Environmental Sciences
Valerii Deshko, Inna Bilous, Dmytro Biriukov, Olena Yatsenko
Summary: The article developed dynamic mathematical models of a two-room typical apartment in Ukraine built in 2016, using Matlab and EnergyPlus software environment to simulate thermal energy consumption of the heating system. Results showed fluctuations in heating system load under different locations of temperature control sensors.
ROCZNIK OCHRONA SRODOWISKA
(2021)
Article
Engineering, Environmental
Olena Ivanenko, Andrii Trypolskyi, Nikolai Gomelya, Anton Karvatskii, Andrii Vahin, Olga Didenko, Viktoria Konovalova, Peter Strizhak
Summary: The study found that the copper-manganese-oxide catalyst has a good carbon monoxide conversion rate and is suitable for flue gas purification. Although the manganese-oxide catalyst has a high conversion rate, the copper-manganese-oxide catalyst has more advantages in practical applications.
JOURNAL OF ECOLOGICAL ENGINEERING
(2021)
Proceedings Paper
Engineering, Manufacturing
Anton Karvatskii, Ihor Mikulionok, Serhii Leleka, Vladyslav Solovei
ADVANCES IN DESIGN, SIMULATION AND MANUFACTURING III: MANUFACTURING AND MATERIALS ENGINEERING, VOL 1
(2020)
Article
Engineering, Civil
I. Yu Bilous, V. Deshko, I. O. Sukhodub
MAGAZINE OF CIVIL ENGINEERING
(2020)
Article
Engineering, Civil
I. Yu. Bilous, V. I. Deshko, I. O. Sukhodub
MAGAZINE OF CIVIL ENGINEERING
(2016)
Article
Construction & Building Technology
Inna Bilous, Valerii Deshko, Iryna Sukhodub
JOURNAL OF BUILDING ENGINEERING
(2018)
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)
