Article
Construction & Building Technology
Surjamanto Wonorahardjo, Inge Magdalena Sutjahja, Ekrem Tuncbilek, Rizky Amalia Achsani, Muslum Arici, Nadiya Rahmah
Summary: The study found that utilizing PCM and ITM-based passive air conditioning systems can effectively reduce energy consumption compared to traditional air conditioners, while improving the thermal environment quality in small urban houses under tropical climates.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Yalin Lu, Jiankai Dong, Hongyong Lu, Dun Niu, Sheng Zhang, Zhaosong Fang, Zhang Lin
Summary: This study proposes a new type of radiant-convective room air conditioner and evaluates its effectiveness for providing thermal comfort under heating mode. The results show that the proposed room air conditioner can increase heat output, improve air distribution, and effectively enhance thermal comfort.
ENERGY AND BUILDINGS
(2022)
Review
Environmental Sciences
Giulia Ulpiani
Summary: This paper conducts a systematic review of the existing knowledge on the link between urban heat island (UHI) and urban pollution island (UPI) since 1990, analyzing results from 16 countries and 11 climatic zones. By examining methodological and experimental trends, geographical dependencies, and research gaps, the paper outlines opportunities and challenges towards disentangling and mitigating these phenomena. Detailed content analysis according to five prominent topics provides a blueprint for coping strategies and precautions in urban design.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Alberto Previati, Jannis Epting, Giovanni B. Crosta
Summary: The study introduces a holistic city-scale 3D FEM model to investigate potential thermal management applications in the Milan metropolitan area, focusing on the formation of subsurface urban heat islands and the impact of natural and anthropogenic factors. Through simulation analysis, the study reveals the heat sources and geothermal potential of the urban subsurface.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Construction & Building Technology
Surjamanto Wonorahardjo, Inge Magdalena Sutjahja, Y. Mardiyati, Heri Andoni, Rizky Amalia Achsani, S. Steven, Dixon Thomas, Ekrem Tuncbilek, Muslum Arici, Nadiya Rahmah, Suwardi Tedja
Summary: This study reveals that different facade systems significantly impact both indoor and outdoor environments, with brick walls storing heat and emitting it to both indoor and outdoor environments. Additional ACP on the brick wall can significantly reduce indoor air temperature, but also has a direct impact on outdoor temperature. Insulation materials are beneficial for lowering indoor air temperature during heating period, while slightly increasing outdoor air temperature.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Fei Pan, Jianzhong Pei, Gewei Zhang, Yong Wen, Jiupeng Zhang, Rui Li
Summary: This study proposes a new highly thermally conductive pavement structure and evaluates its cooling effect on the structural layers and near-surface air. Quartzite improves the thermal inertia of asphalt pavement layers, and the highly thermally conductive pavement effectively transfers accumulated heat in the upper layer, reducing temperatures in the structure layers and near-surface air.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Geosciences, Multidisciplinary
Alberto Previati, Giovanni B. Crosta
Summary: Urban areas significantly impact the local atmospheric and groundwater environment, leading to elevated groundwater temperatures and the existence of subsurface urban heat islands. The density of buildings and subsurface infrastructures is positively correlated with groundwater temperatures within urban areas. Future monitoring of groundwater temperatures and numerical modeling will be crucial to understand the controls on this phenomenon and predict its extent in the study area.
HYDROGEOLOGY JOURNAL
(2021)
Article
Environmental Sciences
I. D. Stewart, E. S. Krayenhoff, J. A. Voogt, J. A. Lachapelle, M. A. Allen, A. M. Broadbent
Summary: This article aims to reconcile the differences in research on surface UHI and atmospheric UHI by generating theoretical time-temperature curves for surface UHI through urban climate models. The authors recommend new and more functional definitions of surface temperature to more accurately assess heat islands and heat risks in cities.
Article
Plant Sciences
Jonghoon Park, Jun-Hyun Kim, Wonmin Sohn, Dong-Kun Lee
Summary: This study assessed the cooling effects of small greenspaces (SGs) and building-shaded spaces (BSs) in urban areas, finding that SGs had a greater impact on reducing heat compared to BSs, especially in blocks with larger greenspace. Additionally, SGs provided the greatest microclimatic benefits in the largest blocks, highlighting the importance of block size in determining cooling degrees.
URBAN FORESTRY & URBAN GREENING
(2021)
Article
Environmental Sciences
Eberhard Parlow
Summary: This paper highlights the complexity and pitfalls of thermal infrared data analysis in urban heat island studies. Authors often jump into UHI research without fully understanding the phenomenon, leading to incorrect conclusions and results. Proper correction of data, consideration of signal source area, and understanding of radiation and heat fluxes are crucial for accurate UHI studies.
Article
Construction & Building Technology
Yuxin Yang, Zisheng Zhao, Junmeng Lyu, Bo Wang, Jinbo Li, Shuguang Zhang, Zhiwei Lian
Summary: A new approach of using a dual-supply vent air conditioner with independent control of the air supply parameters at each vent has been proposed to meet diverse thermal comfort demands of different occupants. The feasibility of this method was tested in a living room environment, and numerical simulation was conducted to explore the differences in thermal environment at various locations under different air supply conditions.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Mathematics
Nacer Sellila, Mohammed Louaked, Waleed Mouhali, Houari Mechkour
Summary: This study aims to explore the use of optimal control techniques for designing green spaces and addressing the environmental problems related to urban heat islands. A three-dimensional model is established to study the effects of urban anthropogenic heat and wind velocity on the environment. The study introduces a penalty approximation method to overcome constraints and solves the optimal control problem using a Spectral Projected Gradient algorithm.
Article
Engineering, Civil
Han Chen, Jinhui Jeanne Huang, Han Li, Yizhao Wei, Xiaotong Zhu
Summary: The urban heat island effect poses a threat to human survival, but evaporation from water bodies can effectively cool temperatures and alleviate this effect. This study proposes a customized urban water body evaporation model that considers anthropogenic heat flux and improves simulation performance. Results show that the model outperforms traditional models in simulating evaporation and that urbanization increases the contribution of evaporation cooling to alleviating the urban heat island effect.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Julian A. Schweighofer, Michael Wehrl, Sebastian Baumgaertel, Joachim Rohn
Summary: The subsurface beneath cities commonly shows a temperature anomaly, known as the Subsurface Urban Heat Island. A study in Nuremberg, Germany found that groundwater temperatures have increased on average by 0.07 K/a over the past five years, with the degree of surface sealing playing a role in these temperature changes.
Article
Environmental Sciences
Fengqi Cui, Rafiq Hamdi, Xiuliang Yuan, Huili He, Tao Yang, Wenhui Kuang, Piet Termonia, Philippe De Maeyer
Summary: The study reveals that the cooling effect of urban green space (UGS) has a significant impact on surface urban heat island intensity (SUHI) under different climatic backgrounds, effectively mitigating nighttime heat island effects and improving citizens' quality of life and health.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.