Review
Green & Sustainable Science & Technology
A. M. Jodeiri, M. J. Goldsworthy, S. Buffa, M. Cozzini
Summary: This article reviews the challenges and limitations of integrating solar thermal, waste heat, geothermal, and biomass energy sources into district heating systems, and identifies the technical and non-technical difficulties associated with this integration.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Thermodynamics
S. Bordignon, D. Quaggiotto, J. Vivian, G. Emmi, M. De Carli, A. Zarrella
Summary: This study proposes a new technical solution for providing air conditioning, domestic hot water, and electricity to a small residential district in heating-dominant regions. The solution includes the use of high-efficiency ground source heat pump, booster heat pumps, and rooftop photovoltaic thermal panels. The proposed system achieves high performance and utilizes multiple energy sources effectively.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Anna Kallert, Robert Egelkamp, Ulrich Bader, Dietmar Muennich, Lisa Staudacher, Hannes Doderer
Summary: The project aims to decarbonize the heating sector through district heating, utilizing renewable energies and waste heat sources, as well as integrating solar thermal systems and biomass boilers for heating security. By optimizing the heating system design and conducting cost-benefit analysis, low heat generation costs and maximized utilization of renewable heat sources are achieved.
Article
Thermodynamics
Rune Hermansen, Kevin Smith, Jan Eric Thorsen, Jiawei Wang, Yi Zong
Summary: District heating systems can reduce carbon dioxide emissions and minimize heat losses, utilizing low-grade surplus heat. By optimizing the charging schedule, load shifting is achieved to minimize operation costs.
Article
Energy & Fuels
Martin Andersen, Chris Bales, Jan-Olof Dalenback
Summary: One challenge in today's district heating systems is the high distribution heat loss. Lowering distribution temperatures and changing the distribution system can reduce operational and investment costs, improving the overall life cycle cost competitiveness of district heating systems.
Article
Thermodynamics
A. Khosravi, T. Laukkanen, V. Vuorinen, S. Syri
Summary: The city of Espoo, Finland is planning to develop Kera as a green suburb with high energy efficiency and low CO2 emissions. The study found that the heat pump scenario is an efficient and cost-effective way to retrieve waste heat from the data center and 5G smart poles.
Article
Chemistry, Physical
Hans Boehm, Simon Moser, Stefan Puschnigg, Andreas Zauner
Summary: Power-to-hydrogen is expected to play a crucial role in future sustainable energy systems, potentially leading to synergies with district heating networks. Studies analyze technology-specific efficiencies, heat flows, and temperatures, while summarizing opportunities and challenges arising from system perspective.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Lin Fu, Yonghong Li, Yanting Wu, Xiaoyin Wang, Yi Jiang
Summary: The study introduces a low carbon district heating system that is suitable for large cities in Northern China, aiming to reduce energy consumption, emissions, and improve the economics of the heating systems.
Article
Thermodynamics
Pauli Hiltunen, Sanna Syri
Summary: The city of Espoo plans to abandon coal in its district heating system by 2025, replacing it with renewable fuels, heat pumps, and waste heat utilization. This transition will significantly reduce CO2 emissions with a small increase in production costs. Utilizing waste heat can further reduce emissions and prevent an increase in production costs.
Article
Thermodynamics
Haichao Wang, Yang Zhou, Xiangli Li, Xiaozhou Wu, Hai Wang, Abdollahi Elnaz, Katja Granlund, Risto Lahdelma, Esa Teppo
Summary: This study develops a method to improve the heating power of existing radiators by installing a small fan and considering different hydraulic connection modes. The experimental results show that the fan should be placed in a position and angle that blows air over the hottest surface of the radiator, resulting in increased response speed, shortened stability time, reduced indoor temperature difference, and reduced maximum indoor air velocity.
Article
Thermodynamics
Monica Arnaudo, Fabio Giunta, Johan Dalgren, Monika Topel, Samer Sawalha, Bjorn Laumert
Summary: Recovering heat from local resources shows promise in reducing the carbon footprint of district heating, with supermarkets equipped with CO2 refrigeration systems and geothermal storage offering increased heating capacity. By implementing a coordinated control strategy, both technical, economic, and environmental impacts can be assessed, with utilizing power-to-heat as a solution to decrease overall CO2 emissions. The study demonstrates the potential of reducing the district's carbon footprint through an intensity-driven control while showing economic advantages for both the district and the supermarket with a price-based control.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Julian Formhals, Frederik Feike, Hoofar Hemmatabady, Bastian Welsch, Ingo Sass
Summary: District heating is crucial for TU Darmstadt to reach its emission reduction target for 2050. Various strategies, including efficiency measures, solar thermal collectors, waste heat utilization, and seasonal storage, are being considered. Dynamic system simulations are used to compare different transition strategies in terms of environmental performance and economic efficiency, with gradual construction of solar thermal collectors and concurrent scaling-down of existing capacity being the most cost-effective strategy.
Article
Construction & Building Technology
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice d'Accadia, Fontina Petrakopoulou, Maria Vicidomini
Summary: The research presents a 5th generation bidirectional heating/cooling network that reduces primary energy consumption and CO2 emissions, with suggestions to address high costs and inadequate energy storage.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Energy & Fuels
Harald Schrammel, Joachim Kelz, Wolfgang Gruber-Glatzl, Christian Halmdienst, Josef Schroettner, Ingo Leusbrock
Summary: The development of the district heating network in Gleisdorf, Austria, over the past decade showcases the transition to a 4th generation DH network. Implemented with a Virtual Heating Plant (VHP) control concept, the system has achieved high efficiency and nearly 100% renewable heat supply by optimizing the network and integrating decentralized heat sources. This innovative approach paves the way for further enhancements in system flexibility and stability, as well as the incorporation of various systemic and non-technical measures for sustainable heating solutions.
Article
Energy & Fuels
Dietrich Schmidt, Kristina Lygnerud, Sven Werner, Roman Geyer, Harald Schrammel, Dorte Skaarup Ostergaard, Oddgeir Gudmundsson
Summary: Low temperature district heating is considered as a key technology for integrating renewable energy and waste heat sources in energy systems to achieve climate goals. These systems have been proven to be feasible, efficient, and reliable under various conditions, but there are challenges that require further research on innovative heating concepts.
Article
Economics
Martin Leurent, Frederic Jasserand, Giorgio Locatelli, Jenny Palm, Miika Rama, Andrea Trianni
Article
Thermodynamics
Martin Leurent, Pascal Da Costa, Miika Rama, Urban Persson, Frederic Jasserand
Article
Thermodynamics
Miika Rama, Mikko Wahlroos
Article
Economics
Martin Leurent, Pascal Da Costa, Frederic Jasserand, Miika Rama, Urban Persson
Review
Green & Sustainable Science & Technology
Itzal del Hoyo Arce, Saioa Herrero Lopez, Susana Lopez Perez, Miika Rama, Krzysztof Klobut, Jesus A. Febres
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2018)
Review
Construction & Building Technology
Satu Paiho, Heidi Saastamoinen, Elina Hakkarainen, Lassi Simila, Riku Pasonen, Jussi Ikaheimo, Miika Rama, Markku Tuovinen, Seppo Horsmanheimo
SUSTAINABLE CITIES AND SOCIETY
(2018)
Article
Thermodynamics
Miika Rama, Martin Leurent, Jean-Guy Devezeaux de Lavergne
Review
Green & Sustainable Science & Technology
Dennis Sundell, Miika Rama
Summary: This study presents methods for estimating the potential of excess and natural heat sources in urban environments, and applies them to a case study in Southwest Finland. The results of the case study show the potential of the heat sources in the studied area, while also highlighting the challenges of obtaining raw data and the need for advanced data processing.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2022)
Article
Environmental Sciences
Esa Pursiheimo, Miika Rama
Summary: The study found that detaching from the district heating network increases total costs, while completely removing the network incurs significantly higher costs. Ground source heat pumps and heat storage were identified as efficient solutions for heating in residential areas.
JOURNAL OF SUSTAINABLE DEVELOPMENT OF ENERGY WATER AND ENVIRONMENT SYSTEMS-JSDEWES
(2021)
Proceedings Paper
Energy & Fuels
Miika Rama, Kari Sipila
15TH INTERNATIONAL SYMPOSIUM ON DISTRICT HEATING AND COOLING (DHC15-2016)
(2017)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
