Article
Thermodynamics
Chenjiyu Liang, Xianting Li, Xiangjun Meng, Wenxing Shi, Junqiang Gu, Baolong Wang, Yanbo Lv
Summary: In this study, a new type of air source heat pump was developed to provide stable heating during defrosting by using multiple air source heat exchangers and anti-icing fluid pipelines. Test results showed that the heating capacity decay rate during defrosting can reach within 20%. After optimization, the heating capacity decay rate can be reduced to within 10%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Yusheng Chen, Phillip Standl, Sebastian Weiker, Matthias Gaderer
Summary: This study investigates the integration of compression heat pumps into biomass heating networks. The results show that integrating heat pumps can significantly improve system efficiency, with flue gas-side integration being more cost-effective. Additionally, adjusting the optimal setpoint of exhaust gas temperature can achieve cost-effectiveness for both integration concepts.
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
Green & Sustainable Science & Technology
Safak Atas, Ilhan Ceylan, Osman Egemen Timar
Summary: The aim of this study was to enhance the efficiency of heat pump systems commonly used for heating in winter. A combined system was created by integrating the heat pump system, solar air collectors, and a heat recovery device. The utilization of these systems together prevented the decrease in energy efficiency that may occur over the course of a day and improved their overall efficiency.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Construction & Building Technology
Yunseok Jang, Dongchan Lee, Jinyoung Kim, Se Hyeon Ham, Yongchan Kim
Summary: A waste-heat recovery water-source heat pump system has been proposed in this study, combining data centers and residential areas, which significantly reduces energy consumption, enhances system performance, and decreases CO2 emissions.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Energy & Fuels
Mohamed Hany Abokersh, Manel Valles, Kangkana Saikia, Luisa F. Cabeza, Dieter Boer
Summary: The study evaluated the techno-economic benefits of different control strategies for a heat pump integrated into a solar assisted district heating system. The system was optimized using a genetic algorithm and applied to a residential neighborhood in Madrid. Results showed significant impact of heat pump control on techno-economic benefits and improved seasonal storage efficiency up to 90%.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Benzhi Hou, Yihua Zheng, Luyi Xing, Qinglu Song
Summary: The performance of thermoelectric heat pumps is enhanced by air recirculation and regenerative energy recovery. Experimental results show that the COP of the air recirculation TEHP is as high as about 3.7, and the COP with recirculation is 51-73% higher than without recirculation. The combination of regenerative heat recovery and air recirculation further improves the energy efficiency of the heat exchanger test system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Stefan Petersen, Jan Albers
Summary: The article discusses the use of district heat return line as low temperature heat source, hydraulic concepts for district heat supply line, and presents experimental results and a new hydraulic design for district heat supply flow rate. It also explores the potential of reducing heat losses in DH networks and increasing transport capacity with enhanced absorption HCS.
Article
Thermodynamics
Jaros law Mikielewicz, Dariusz Mikielewicz
Summary: The paper compares a traditional district heating system with conventional boilers to a low temperature DH system that incorporates CHP and the organic Rankine Cycle to produce both electricity and heat within the system. A developed analytical model is used to analyze the efficiency of the systems, although only simplified examples are provided in this paper.
Article
Construction & Building Technology
Oguz Arslan, Asli Ergenekon Arslan, Taqiy Eddine Boukelia
Summary: A new residential heat pump system was designed for domestic use in the geothermal district heating system. The system integrated a heat pump into the substations of the residences, using a thermal energy storage unit instead of a conventional evaporator. Various systems were analyzed thermodynamically, and the most suitable system was determined through a multi-criteria decision-making analysis. The results showed that the designed system had a favorable NPV value, exergy efficiency, and CO2 reduction.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Jibo Long, Kuiming Xia, Huihui Zhong, Haolin Lu, Yongga A
Summary: This study proposes a hybrid solar hot water and air source heat pump combined heating system, which optimizes energy efficiency through different connection modes. Simulation analysis of the system's energy efficiency in the cold season reveals that solar radiation intensity and ambient temperature are crucial factors affecting efficiency. By switching the connection mode of solar hot water and air source heat pump based on outdoor weather conditions, the system can achieve significant energy-saving benefits.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Luca Cioccolanti, Massimiliano Renzi, Gabriele Comodi, Mose Rossi
Summary: Waste Heat Recovery (WHR) from energy intensive industries, especially in the pulp and paper sector, can significantly reduce CO2 emissions and save energy. District Heating (DH) is an effective solution to satisfy heating demand and connect residential buildings to cogeneration plants. The proposed method allows for evaluating thermal power distribution and assessing the environmental and energy benefits of WHR.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Alice Tosatto, Abdulrahman Dahash, Fabian Ochs
Summary: Large-scale water-based thermal energy stores coupled with heat pumps are essential for increasing the use of renewables in district heating systems. This study presents a reliable tool for studying large-scale thermal energy storage systems by combining a 1D equation-based model with a 2D or 3D finite element model of the surrounding ground. The impact of using the thermal energy storage as the evaporator heat source for the heat pump on the storage performance and ground temperatures is investigated.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Peiyuan Mi, Jili Zhang, Youhua Han, Xiaochao Guo
Summary: This paper introduces the application of photovoltaic thermal heat pump system in clean heating reconstruction, and verifies its feasibility through simulation and economic analysis, showing a relatively short payback period.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Yan Li, Lingling Wang, Kangwu Xu, Shuyan Zhang, Haiwu Zheng, Xiao Dong
Summary: Decreasing the return water temperature of heat network is crucial for increasing the feasibility of district heating. This study proposes a novel district heating system based on large temperature-difference heat exchange, which can significantly improve system efficiency and reduce costs by optimizing the key parameters of absorption heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2022)
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)