Article
Energy & Fuels
Archan Shah, Moncef Krarti, Joe Huang
Summary: This paper evaluates the energy performance of shallow ground source heat pumps and presents a systematic approach to model their energy efficiency benefits. The study finds that shallow ground source heat pumps are more energy efficient than conventional air-to-air heat pumps in most climate zones in California, with specific configurations being cost-effective in certain areas.
Article
Thermodynamics
Minwoo Lee, Jinyoung Kim, Hyun Ho Shin, Wonhee Cho, Yongchan Kim
Summary: The adoption of appropriate alternative refrigerants can effectively reduce the energy consumption and CO2 emissions of heat pump systems. However, there is limited investigation on alternative refrigerants for ground-source heat pump (GSHP) and solar-assisted ground-source heat pump (SGSHP) systems, which still use conventional refrigerants. This study compares the life cycle climate performance (LCCP) and primary energy consumption (PEC) of GSHP and SGSHP systems using conventional and alternative refrigerants, and suggests different optimal choices based on regional factors.
Article
Thermodynamics
Yongbao Chen, Zhisen Chen, Zhe Chen, Xiaolei Yuan
Summary: This paper proposes an integrated energy system based on a solar-assisted ground source heat pump for heating rural houses, optimizing operational modes to improve energy efficiency and reduce electricity demand.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Sara Bordignon, Giuseppe Emmi, Angelo Zarrella, Michele De Carli
Summary: This paper introduces a new Type for simulating a reversible water-to-water heat pump and evaluates its performance under different refrigerants. By simulating the heating and cooling system under various climate conditions, the study demonstrates the long-term performance of the ground source heat pump and compares it with traditional refrigeration systems.
APPLIED THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Qijie Ma, Jianhua Fan, Hantao Liu
Summary: The decarbonization of the building sector has the potential to significantly reduce greenhouse gas emissions. A ground source heat pump system based on energy piles and coupled with seasonal solar energy storage was designed for high-rise residential buildings' heating/cooling demands. An optimal design procedure was developed to consider the constraints of temperature changes in the energy pile and prevent cold build-up in the ground. Numerical evaluations were conducted to assess the system's performance under different ground conditions and heating-dominated climates across China.
Article
Thermodynamics
Manuel Laemmle, Constanze Bongs, Jeannette Wapler, Danny Guenther, Stefan Hess, Michael Kropp, Sebastian Herkel
Summary: Heat pumps face challenges in existing buildings due to high temperature requirements of existing radiator systems. This paper links heat pump performance analysis with methods to reduce space heating temperatures, demonstrating the potential for energy and cost-efficient operation of retrofitted heat pumps in existing radiator heating systems.
Article
Construction & Building Technology
Bo Gao, Xiaoyue Zhu, Xiaojiao Yang, Yanping Yuan, Nanyang Yu, Ji Ni
Summary: The study tested the operation performance of 26 GSHP systems in Sichuan, Chongqing, and Shaanxi and found that the average coefficient of performance (COP) was less than 3.0 under heating conditions, failing to meet the national standards for energy-saving requirements. Typical problems were identified, and it was recommended to use ground-coupled heat pump (GCHP) systems in the western regions of China to improve operation performance.
JOURNAL OF BUILDING ENGINEERING
(2021)
Review
Green & Sustainable Science & Technology
Tian You, Wei Wu, Hongxing Yang, Jiankun Liu, Xianting Li
Summary: The study reviews the hybrid PVT-GSHP technology, discussing the principles, configurations, and functions of different system categories. It also suggests future directions for improvement, including advanced ground heat exchangers, PVT types, hybrid systems, and optimal design for better performance.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Energy & Fuels
P. Jha, B. Das, R. Gupta, J. D. Mondol, M. A. Ehyaei
Summary: Photovoltaic (PV) technology is impacted by elevated temperatures, leading to the introduction of photovoltaic thermal collector (PVTC) systems. This review focuses on the design and development of heat exchangers used in air and water-based PVTC systems. Heat exchangers improve heat transfer from the back surface of PV modules, enhancing overall efficiency. Air-based PVTC systems achieve electrical efficiency ranging from 4% to 24%, while water-based systems reach 5.1% to 15.8%. Thermal efficiency is higher in air-based systems (87%) compared to water-based systems (72%), indicating significant progress. Future recommendations for enhancing PVTC systems are also discussed.
Article
Thermodynamics
Seyed Mojtaba Hosseinnia, Mikhail Sorin
Summary: A two-step approach for optimum integration of solar assisted ground source heat pump in buildings is proposed. The first step involves energy targeting and determining optimum equipment size based on dynamic pinch analysis, resulting in multiple energy efficient daily design candidates. In the second step, a final design working for the whole year is selected by computing the total annual cost. The importance of electricity cost in choosing the overall year integration design is illustrated in the context of the Canadian market.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Kadir Bakirci, Bedri Yuksel
Summary: A simulation study of the solar-source heat pump system was conducted, investigating the performance of the designed system both experimentally and theoretically. The developed model corresponded well with the experimental data, with differences in performance values being around 8% and 5% for COP and COPS, respectively.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Dongwei Zhang, Chenglei Fang, Zhao Gao, Xin Wang, Chao Shen, Hang Li
Summary: Wastewater heat pump systems are extensively researched for their energy conservation and environmental benefits. This study examines the use of transcritical CO2 heat pumps for wastewater heat recovery, and compares them with regenerative boiler systems. The results show that the regenerative heat pump system can save 76.67% more energy than the regenerative boiler system, with reduced carbon dioxide emissions and lower life cycle costs. With government subsidies, the regenerative heat pump system can achieve a higher annual average cost difference. This research promotes the implementation of transcritical CO2 heat pumps in wastewater heat recovery technology.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Meghann Smith, Anthony Bevacqua, Sheryl Tembe, Pankaj Lal
Summary: Developing clean energy policies based on scientific research is essential for mitigating climate change risks. This study focuses on ground source heat pump (GSHP) systems as a means to reduce emissions in the buildings sector. Through life cycle analysis, it is found that GSHP systems operating in New Jersey have the potential to significantly reduce emissions, especially when compared to traditional heating methods. In addition to environmental benefits, GSHP systems also show economic advantages over fossil fuel-based heating systems.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Jere Knuutinen, Herman Book, Vesa Ruuskanen, Antti Kosonen, Paula Immonen, Jero Ahola
Summary: This paper examines four different control methods for DHW heating in a building with a GSHP and a PV system. The main control method aims to minimize DHW heating costs by utilizing market information and PV production output forecast, showing significant cost savings even with forecasting errors.
Review
Construction & Building Technology
Yaolin Lin, Zhenyan Bu, Wei Yang, Haisong Zhang, Valerie Francis, Chun-Qing Li
Summary: This paper reviews the research and development of solar-assisted heat pumps for buildings in China, including different stages of research, types of heat pumps, core components, computer software, and economic feasibility evaluation. The application of SAHPs in practical projects and relevant regulations, standards, and policies in China are also examined. Recommendations for the future development of solar-assisted heat pumps in China are suggested.
Article
Energy & Fuels
Zhiyong Tian, Bengt Perers, Simon Furbo, Jianhua Fan, Jie Deng, Janne Dragsted
Article
Thermodynamics
Zhiyong Tian, Bengt Perers, Simon Furbo, Jianhua Fan
Article
Thermodynamics
Zhiyong Tian, Bengt Perers, Simon Furbo, Jianhua Fan
ENERGY CONVERSION AND MANAGEMENT
(2018)
Article
Energy & Fuels
Simon Furbo, Janne Dragsted, Bengt Perers, Elsa Andersen, Federico Bava, Kristian Pagh Nielsen
Article
Thermodynamics
Benjamin Ahlgren, Zhiyong Tian, Bengt Perers, Janne Dragsted, Emma Johansson, Kajsa Lundberg, Jonatan Mossegard, Joakim Bystrom, Olle Olsson
ENERGY CONVERSION AND MANAGEMENT
(2018)
Article
Thermodynamics
Weiqiang Kong, Zhifeng Wang, Xing Li, Guofeng Yuan, Jianhua Fan, Bengt Perers, Simon Furbo
APPLIED THERMAL ENGINEERING
(2019)
Article
Construction & Building Technology
Mark Dannemand, Bengt Perers, Simon Furbo
ENERGY AND BUILDINGS
(2019)
Review
Thermodynamics
Zhiyong Tian, Shicong Zhang, Jie Deng, Jianhua Fan, Junpeng Huang, Weiqiang Kong, Bengt Perers, Simon Furbo
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Energy & Fuels
Guofeng Yuan, Jianhua Fan, Weiqing Kong, Simon Furbo, Bengt Perers, Fabienne Sallaberry
Review
Energy & Fuels
Daniel Tschopp, Zhiyong Tian, Magdalena Berberich, Jianhua Fan, Bengt Perers, Simon Furbo
Article
Thermodynamics
Adam R. Jensen, Ioannis Sifnaios, Bengt Perers, Jan Holst Rothmann, Soren D. Morch, Poul V. Jensen, Janne Dragsted, Simon Furbo
Summary: This study presents the design and performance of the Bronderslev hybrid plant, which is the world's first CSP-biomass plant to utilize waste heat. The plant successfully provides heat to the local district heating grid using a combination of solar collector field and biomass boilers, and the ORC system achieves high electrical efficiency. The results demonstrate the reliable operation of the hybrid plant and the potential of CSP-biomass hybridization.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Proceedings Paper
Energy & Fuels
Fabienne Sallaberry, Zhiyong Tian, Bengt Perers, Simon Furbo, Andreas Zourellis, Jan Holst Rothmann
SOLARPACES 2018: INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS
(2019)
Proceedings Paper
Energy & Fuels
Andreas Zourellis, Bengt Perers, Jes Donneborg, Jelica Matoricz
16TH INTERNATIONAL SYMPOSIUM ON DISTRICT HEATING AND COOLING, DHC2018
(2018)
Proceedings Paper
Green & Sustainable Science & Technology
Fabienne Sallaberry, Zhiyong Tian, Odei Goni Jauregi, Simon Furbo, Bengt Perers, Andreas Zourellis, Jan Holst Rothmann
INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS (SOLARPACES 2017)
(2018)
Proceedings Paper
Construction & Building Technology
Zhiyong Tian, Bengt Perers, Simon Furbo, Jianhua Fan
PROCEEDINGS OF THE 11TH ISES EUROSUN 2016 CONFERENCE
(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.
