Article
Construction & Building Technology
Roman Vavricka, Jindrich Bohac, Tomas Matuska
Summary: The article discusses an experimental development of a new prototype for wastewater heat recovery, emphasizing high efficiency and heat savings. Tests met certification criteria and showed a peak heat transfer efficiency of 62%, resulting in over 21% heat savings with the new prototype.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Abdelkarim Tahiri, Kevin Michael Smith, Jan Eric Thorsen, Christian Anker Hviid, Svend Svendsen
Summary: This paper proposes two novel control concepts to optimize the charging of domestic hot water (DHW) tanks in large buildings supplied by district heating systems. The first concept employs a smart energy meter, while the second concept uses staged proportional gain with an added temperature sensor. By implementing these control methods, comfort and hygienic requirements are met, and energy consumption and total flow are reduced.
Article
Thermodynamics
Daegyu Lee, Hyo Jae Jeong, Hyung Yong Ji, Sung Yong Park, Dong-Yeol Chung, Chaedong Kang, Kyung Min Kim, Dongho Park
Summary: This study developed a latent heat storage system using solid-liquid phase change material for peak load shifting control of hot water supplied by district heating in an apartment complex. A field demonstration showed that the latent heat storage system can effectively reduce the total heat flow and variability of hot water supply.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Ryunhee Kim, Yejin Hong, Youngwoong Choi, Sungmin Yoon
Summary: An automated fouling detection method for district heating substations (DHS) is proposed, which significantly improves detection performance for light fouling conditions with the assistance of virtual sensors. Virtual measurements are fed into the input layer of the detection model to reinforce the physical relationship of the trained model and address the issue of sensor absences.
Article
Engineering, Chemical
Pawel Obstawski, Monika Janaszek-Mankowska, Arkadiusz Ratajski
Summary: This paper introduces a new method for diagnosing hot water storage tanks under operating conditions, which enables the determination of thermal conductivity coefficients of the coil heat exchanger and the intensity of heat transfer, as well as the determination of dynamic properties of the tank. By analyzing the changes in material constants and dynamic properties of the tank as a function of medium flow rate, multi-criteria optimization can be performed, resulting in up to a 10% reduction in the time taken to prepare domestic hot water with a conventional tank design.
Article
Energy & Fuels
Sabina Kordana-Obuch, Mariusz Starzec
Summary: Wastewater has significant potential as a source of clean energy. The use of shower heat exchangers seems to be the most reasonable solution, but the unwillingness of society to adopt this solution in Poland is a problem. To tackle this issue, the efficiency of a new compact shower heat exchanger and its linear counterpart was investigated, and the financial efficiency of using the compact heat exchanger with average water consumption for showering was evaluated. The study revealed that the compact shower heat exchanger has higher efficiency than its linear counterpart and is particularly beneficial when the building uses an electric hot water heater.
Article
Thermodynamics
Drilon Meha, Jagruti Thakur, Tomislav Novosel, Tomislav Puksec, Neven Duic
Summary: The study examines the expansion potential of district heating by integrating spatial-temporal methods for space heating and hot water demand. By using various mapping techniques and demand profiles, it is found that the existing heating system has great potential to increase while reducing carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Arnaud Lapertot, Guillaume Segond, Thomas Fasquelle, Benjamin Kadoch, Olivier Le Metayer
Summary: This study investigates an experimental domestic hot water production system that uses a heat pump to recover heat from the air of a collective dwelling and transfer it to a thermal storage for hot water needs. A multi-criteria optimization approach is applied to optimize the system parameters, with a focus on the influence of the hot water demand profile. The optimization methodology is proven effective in significantly improving the system efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Food Science & Technology
Luisa A. Scudeller, Pascal Blanpain-Avet, Thierry Six, Severine Bellayer, Maude Jimenez, Thomas Croguennec, Christophe Andre, Guillaume Delaplace
Summary: Calcium chelators can reduce fouling in plate heat exchangers during pasteurization of whey protein solutions. Research indicates the presence of two different fouling mechanisms depending on the concentration of added phosphorus in the whey protein isolate solutions: a spongy fouling layer at lower concentrations and a heterogeneous fouling layer at higher concentrations.
Article
Engineering, Chemical
Ehsan Davoudi, Bahareh Kamyab Moghadas
Summary: In this study, artificial neural networks and adaptive neural-based fuzzy inference system were used to predict the fouling factor of hot wire probe based on a large dataset. The cascade feed-forward neural network was found to be the best artificial intelligence model for accurately estimating the fouling factor.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Construction & Building Technology
Beata Piotrowska, Daniel Slys
Summary: This paper explores the efficiency of energy recovery from wastewater by using a new horizontal heat exchanger. The research shows that the new heat exchanger can reduce energy consumption for hot water preparation by an average of 22-31%.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Xiong Zhang
Summary: This study establishes heat transfer and energy conversion models for MDGHP systems, investigates the influence of key design and control parameters on the system's performance, and proposes optimization strategies for system efficiency.
APPLIED THERMAL ENGINEERING
(2021)
Review
Energy & Fuels
Ajay Muraleedharan Nair, Christopher Wilson, Ming Jun Huang, Philip Griffiths, Neil Hewitt
Summary: Thermal energy storage using phase change materials (PCM) has flexible operating temperature range, high energy storage density, and reasonable cost, making it widely used in building and hot water production. This paper reviews the innovative techniques and research findings of PCM in domestic thermal heating, and summarizes the important factors for selecting suitable PCM for these applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Hongzhi Liu, Takao Katsura, Katsunori Nagano
Summary: An inverter-driven heat pump prototype for domestic hot water supply was built with a multi-tubular tube-in-tube counter-flow heat exchanger as condenser. The study found that the heating COP remained constant due to the opposite dependencies of heat transfer and pressure drop in the condenser. The effect of compressor frequency on heating COP varied with different inlet temperatures.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Viktoria Vamos, Miklos Horvath
Summary: Accurate knowledge of domestic hot water (DHW) and heat consumption is necessary for heat cost allocation and planning. A study in Budapest, Hungary analyzed DHW consumption in 115 commi block buildings and found that the average daily DHW consumption per flat is 126 L and per m(2) is 892 L. DHW consumption is approximately 30% higher in winter compared to summer.
Article
Thermodynamics
Srbislav B. Genic, Branislav M. Jacimovic, Uros M. Milovancevic, Milos M. Ivosevic, Milena M. Otovic, Milan I. Antic
HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Branislav Jacimovic, Srbislav Genic
FLUID PHASE EQUILIBRIA
(2018)
Article
Thermodynamics
Uros M. Milovancevic, Branislav M. Jacimovic, Srbislav B. Genic, Faraj El-Sagier, Milena M. Otovic, Snezana M. Stevanovic
Article
Thermodynamics
Andrija Petrovic, Milos Z. Jovanovic, Srbislav Genic, Ugljesa Bugaric, Boris Delibasic
Article
Thermodynamics
Branislav Jacimovic, Srbislav Genic, Mirjana Stamenic
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2019)
Article
Thermodynamics
Milos Ivosevic, Andrija Petrovic, Branislav Jacimovic, Srbislav Genic
HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Sasa Markovic, Branislav Jacimovic, Srbislav Genic, Milos Mihailovic, Uros Milovancevic, Milena Otovic
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2019)
Article
Engineering, Chemical
Nikola Jacimovic, Srbislav Genic, Branislav Jacimovic
CHEMICAL ENGINEERING & TECHNOLOGY
(2019)
Article
Thermodynamics
Milos Mihailovic, Uros Milovancevic, Srbislav Genic, Branislav Jacimovic, Milena Otovic, Petar Kolendic
EXPERIMENTAL HEAT TRANSFER
(2020)
Article
Energy & Fuels
Branislav Jacimovic, Srbislav Genic, Nikola Jacimovic
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Thermodynamics
Stefan Izvoreanu, Adrian Eugen Cioabla, Timotei Bogdan Bacos, Andrei Tiberiu Borborean, Srbislav B. Genic, Dorin Lelea, Francisc Popescu, Maja S. Trumic
Summary: This study aims to analyze the possibility of obtaining biogas through anaerobic digestion of solid agricultural wastes (degraded corn and wheat) in municipal waste-waters substrate. The biogas production was tested on a self-sustained double biogas reactors and CH4 production obtained presented. Combustion of biogas-like syngas simulating produced biogas was performed in the presence of ZnAl2O4 and CoAl2O4 catalyst, in an experimental combustor. Experiments conducted showed that both corn and wheat blended with municipal waste-water produce biogas with up to 80% CH4 concentration and that combustion behavior of biogas is improved in presence of CoAl2O4 catalyst.
Article
Engineering, Chemical
Srbislav Genic, Branislav Jacimovic
CHEMICAL ENGINEERING PROGRESS
(2018)
Article
Construction & Building Technology
Samiran Khorat, Debashish Das, Rupali Khatun, Sk Mohammad Aziz, Prashant Anand, Ansar Khan, Mattheos Santamouris, Dev Niyogi
Summary: Cool roofs can effectively mitigate heatwave-induced excess heat and enhance thermal comfort in urban areas. Implementing cool roofs can significantly improve urban meteorology and thermal comfort, reducing energy flux and heat stress.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Qi Li, Jiayu Chen, Xiaowei Luo
Summary: This study focuses on the vertical wind conditions as a main external factor that limits the energy assessment of high-rise buildings in urban areas. Traditional tools for energy assessment of buildings use a universal vertical wind profile estimation, without taking into account the unique wind speed in each direction induced by the various shapes and configurations of buildings in cities. To address this limitation, the study developed an omnidirectional urban vertical wind speed estimation method using direction-dependent building morphologies and machine learning algorithms.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Xiaojun Luo, Lamine Mahdjoubi
Summary: This paper presents an integrated blockchain and machine learning-based energy management framework for multiple forms of energy allocation and transmission among multiple domestic buildings. Machine learning is used to predict energy generation and consumption patterns, and the proposed framework establishes optimal and automated energy allocation through peer-to-peer energy transactions. The approach contributes to the reduction of greenhouse gas emissions and enhances environmental sustainability.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ying Yu, Yuanwei Xiao, Jinshuai Chou, Xingyu Wang, Liu Yang
Summary: This study proposes a dual-layer optimization design method to maximize the energy sharing potential, enhance collaborative benefits, and reduce the storage capacity of building clusters. Case studies show that the proposed design significantly improves the performance of building clusters, reduces energy storage capacity, and shortens the payback period.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Felix Langner, Weimin Wang, Moritz Frahm, Veit Hagenmeyer
Summary: This paper compares two main approaches to consider uncertainties in model predictive control (MPC) for buildings: robust and stochastic MPC. The results show that compared to a deterministic MPC, the robust MPC increases the electricity cost while providing complete temperature constraint satisfaction, while the stochastic MPC slightly increases the electricity cost but fulfills the thermal comfort requirements.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Somil Yadav, Caroline Hachem-Vermette
Summary: This study proposes a mathematical model to evaluate the performance of a Double Skin Facade (DSF) system and its impact on indoor conditions. The model considers various design parameters and analyzes their effects on the system's electrical output and room temperature.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ruijun Chen, Holly Samuelson, Yukai Zou, Xianghan Zheng, Yifan Cao
Summary: This research introduces an innovative resilient design framework that optimizes building performance by considering a holistic life cycle perspective and accounting for climate projection uncertainties. The study finds that future climate scenarios significantly impact building life cycle performance, with wall U-value, windows U-value, and wall density being major factors. By using ensemble learning and optimization algorithms, predictions for carbon emissions, cost, and indoor discomfort hours can be made, and the best resilient design scheme can be selected. Applying this framework leads to significant improvements in building life cycle performance.
ENERGY AND BUILDINGS
(2024)