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Assessment of green roof performance for sustainable buildings under winter weather conditions

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Journal of Central South University 2012年第3期19卷 639-644页

作者： J.Srebric Department of Architectural Engineering The Pennsylvania State University

A green roof is a specialized roof system that supports vegetation growth on *** technology is rapidly gaining popularity as a sustainable design option for *** order to contribute to an understanding of green roof in regions with cold winters and snow,an on-site experimental investigation was present with a focus on the assessment of green roof performance during the *** field experiment took place on a six small buildings during the winter of *** work monitored three buildings with green roofs,two buildings with reference roofs and one building with a bare soil coverage for the *** six buildings were identically constructed and instrumented with sensor networks to provide heat flux data through the *** 15 min averaged data were statistically analyzed for a week under the two separate periods,first without a snow cover and second with a snow *** results show that the roof type is a significant factor in affecting the thermal performance of these *** importantly,green roofs reduce heat flow through the roof and thus reduce the heating energy demand during the ***,the energy savings for buildings with the green roofs are reduced under snow conditions because the snow diminishes thermal resistance of the roof and increases the heat transfer process through the roofs.

关键词： green roof energy savings building envelop sustainable buildings

MEDIA COMPOSITION INFLUENCES green roof PLANT VIABILITY IN THE OZARK HIGHLANDS

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Journal of green Building 2012年第4期7卷 73-84页

作者： D.C.Toland C.P.West M.E.Boyer Department of Crop Soiland Environmental SciencesUniversity of Arkansas115 Plant SciencesFayettevilleAR 72701 Department of Landscape Architecture University of Arkansas230 Memorial HallFayettevilleAR 72701

Plant selection and establishment are critical components for green roof health and success. Plant palettes (sets of plant species selected for specific conditions) for green roofs vary in their ability to confer benefits depending on the species make-up and their adaptation to particular environments and climates. The response of various species to climatic factors on rooftops is unknown for the Ozark Highlands region. The objective of this study was to compare plant survival and spread in three growing medium treatments (course and fine texture with compost and fine texture with no compost) installed as part of a green roof system. The study was performed on a green roof system at the University of Arkansas in Fayetteville over 3 years. Data were collected on 13 species installed in September of 2006 and surveyed on three dates thereafter: April 30, 2007;May 19, 2009;September 10, 2009. The treatments with added compost had statistically greater vegetated cover (from 73 to 87%) compared to the fine medium without compost (36 to 43%). In most cases the spread of individual plants was not significantly different between treatments. Results indicated that rooting medium containing compost increased survival and overall vegetated roof coverage, and identified various potential green roof plant species for the Ozark Highland environment. Two species, Sedum middendorffianum var. diffusum and Sedum spurium ‘Roseum’, did particularly well in all treatments. One species, Sedum kamtschaticum, did well only in the treatments with compost.

关键词： green roof Sedum Extensive green roof

green roof Performance for Stormwater Management in Equatorial Urban Areas Using Storm Water Management Model (SWMM)

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Journal of Water Resource and Protection 2023年第12期15卷 706-720页

作者： King Kuok Kuok Po Chan Chiu Mei Yun Chin Md. Rezaur Rahman Muhammad Khusairy Bakri Faculty of Engineering Computing and Science Swinburne University of Technology Sarawak Campus Kuching Sarawak Malaysia Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Kota Samarahan Sarawak Malaysia Faculty of Engineering Universiti Malaysia Sarawak Kota Samarahan Sarawak Malaysia Composites Materials and Engineering Center Washington State University Pullman WA USA

Many Low Impact Developments (LIDs) have recently been developed as a sustainable integrated strategy for managing the quantity and quality of stormwater and surrounding amenities. Previous research showed that green roof is one of the most promising LIDs for slowing down rainwater, controlling rainwater volume, and enhancing rainwater quality by filtering and leaching contaminants from the substrate. However, there is no guideline for green roof design in Malaysia. Hence, Investigating the viability of using green roofs to manage stormwater and address flash flood hazards is urgently necessary. This study used the Storm Water Management Model (SWMM) to evaluate the effectiveness of green roof in managing stormwater and improving rainwater quality. The selected study area is the multistory car park (MSCP) rooftop at Swinburne University of Technology Sarawak Campus. Nine green roof models with different configurations were created. Results revealed that the optimum design of a green roof is 100 mm of berm height, 150 mm of soil thickness, and 50 mm of drainage mat thickness. With the ability to reduce runoff generation by 26.73%, reduce TSS by 89.75%, TP by 93.07%, TN by 93.16%, and improved BOD by 81.33%. However, pH values dropped as low as 5.933 and became more acidic due to the substrates in green roof. These findings demonstrated that green roofs improve water quality, able to temporarily store excess rainfall and it is very promising and sustainable tool in managing stormwater.

关键词： green roof Low Impact Development (LID) Storm Water Management Model (SWMM) Storage Capacity Pollutants Removal

Application of green roof in Relieving Urban Waterlogging: A Review

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Journal of Landscape Research 2017年第6期9卷 74-76,80页

作者： LIU Li LIU Xiaoqing College of City Construction Jiangxi Normal University Guangzhou Jinpeng Intelligent Community Management Co.Ltd

green roof plays a critical role in regulating roof runoff by reducing runoff, delaying runoff generation, reducing runoff peak flow and improving runoff water quality effectively. On the basis of introducing significance and role of green roof, this paper reviewed domestic and international researches on the green roof's control over roof runoff, and analyzed the factors that influence the control of green roof over the runoff, so as to provide a theoretical support and method for the construction of green roofs in urban districts.

关键词： green roof Urban waterlogging Stormwater runoff Regulation mechanism

Ecological Function of Urban green roof and Analysis of Its Influencing Factors

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Agricultural Science & Technology 2017年第12期18卷 2583-2586页

作者：刘晓青刘丽广州金鹏智慧社区运营管理有限公司广东广州510663 江西师范大学城市建设学院江西南昌330022

Based on the analysis of the multiple ecological functions of green roofs, the main factors affecting the ecological functions of green roofs are expounded and the numerical simulation methods for quantitative calculation of ecological functions of green roofs are summarized in order to provide theoretical and method support for the construction of urban green roofs.

关键词： green roof Rainwater management Ecological function Influencing fac-tors

Research on the green-roof reconstruction strategy of existing buildings in the Yangtze River basin of China

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西部人居环境学刊 2015年第A01期30卷 104-111页

作者： Tiejun Zhou Jianwu Xiong Faculty of Architecture and Urban Planning Chongqing University

This paper analyzes the green-roof adaptability of existing buildings in the Yangtze River basin of China. Focused on the adaptability of reconstruction cost and construction technology, it puts forward integrated and combined reconstruction strategies of the green-roof through experiments and data analysis to further explore the cost adaptability, environment adaptability and energy saving adaptability, which ultimately provides new methods for the reconstruction of existing buildings in the Yangtze River basin of China.

关键词： The Yangtze River basin green roof Existing building roof Reconstruction technology

Do green roofs really provide significant energy saving in a Mediterranean climate? Critical evaluation based on different case studies

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Frontiers of Architectural Research 2021年第2期10卷 447-465页

作者： Fabio Fantozzi Carlo Bibbiani Caterina Gargari Roberto Rugani Giacomo Salvadori Department of Energy SystemsTerritory and Constructions EnsineerinsUniversity of Pisa56122PisaItaly Department of Veterinary Science University of Pisa56124PisaItaly

green roofs represent a growing technology that is spreading increasingly and rapidly throughout the building *** latest national and international regulations are promoting their application for refurbishments and new buildings to increase the energy efficiency of the building *** recent years,vegetative coverings have been studied to demonstrate their multiple benefits,such as the reduction of the urban heat island phenomenon and the increase in the albedo of *** the contrary,this study aims to verify the actual benefit of applying a green roof on a sloped cover compared with installing a highly insulated tiled *** EnergyPlus tool has been used to perform dynamic analyses,which has allowed to understand the behavior of two different stratigraphies in accordance with weather conditions,rain,and irrigation *** have shown that the installation of a green roof cannot always be considered the best solution for reducing building energy consumption,especially if compared with a classic highly insulated clay tile *** terms of summer air conditioning,the maximum saving is 0.72 kWh/*** presence of water in the soil has also been proven a crucial factor.

关键词： green roof Mediterranean climate Building energy performance Dynamic energy simulation Energy policy

PRAIRIE-BASED green roofS:LITERATURE,TEMPLATES,AND ANALOGS

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Journal of green Building 2012年第1期7卷 143-172页

作者： Richard K.Sutton John A.Harrington Lee Skabelund Peter MacDonagh Reid R.Coffman Gord Koch Department of Agronomy and Horticulture and the Program in Landscape Architecture 279 Plant SciencesLincolnNEUSA UW-Madison 25 Agricultural Hall 1450 Linden DriveMadisonWIUSA54706 Kansas State University Department of Landscape Architecture and Regional and Community Planning3031 Seaton HallManhattanKSUSA66502 Kestrel Design Group 7101 Ohms LaneMinneapolisMN 55439 USA University of Oklahoma Olds College

Native prairie species have been both promoted and questioned in their ability to serve as vegetative covers for green *** green roof environment with its exposure to intense sun and wind and limited moisture restricts the capacity for a large diversity of *** result has been,in many cases,a standard,low-diversity mix of Sedum species often focused on ornament and minimizes the potential for wider environmental *** reviewed the ecological literature on prairie and grassland communities with specific reference to habitat templates from stressed environmental conditions and examined analogs of prairie-based vegetation on twenty-one existing green *** found that many,but not all prairie and grassland species will survive and thrive on green roofs,especially when irrigated as needed or given adequate growing medium *** raise several important questions about media,irrigation,temperature,biodiversity and their interactions needing more study.

关键词： extensive semi-intensive green roof habitat templates prairie plants

Thermal Behaviour in Buildings with green Covers Combined with Natural Ventilation, green Facades and green roofs

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Journal of Civil Engineering and Architecture 2016年第10期10卷 1131-1143页

作者： Nuria Perez Gallardo Mauricio Sanches Duarte Silva Gustavo Zen de Figueiredo Neves Adriano Rogerio Bruno Tech Francisco Arthur da Silva Vecchia School of Engineering University of Sao Paul Sao Carlo 13566-590 Brazil Department Zootechnics Science and Food Engineering School of Engineering University of Sao Paulo Sao Carlo 13566-590Brazil

The main aim of this paper was to study the influence of ventilation during a typical experimental day, in the internal air temperature as well as in internal surface temperatures under the conditions of the outer environment, using an experimental method which allows a comparison of the thermal performance between four cell tests： a prototype called control （no vegetation） and three with different combinations of vegetation （roofs and facades） installed in a region of tropical climate. The experiments were developed in four test cells with dimensions 2.0 m × 2.50 m × 2.7 m. Measurements of internal surface temperatures and internal air temperatures were collected with the use of specific equipment, a data logger （CR1000, Campbell Scientific Inc.）, connected with two multiplexers 32 channels （416AM Campbell Scientific Inc.）. Data were recorded over a year and a typical heat day was selected, which was September 24, 2015. The results show that ventilation affects the internal temperature of the air, so that this gets even surpass the external temperature. Regarding surface temperatures, increased temperature, except those which are provided with vegetation, namely, the surfaces which have green walls and green roofs file the lower temperatures. Therefore, we can confirm the ability of vegetation to maintain more pleasant internal conditions compared to the test cells built with conventional materials, thus it can reduce cooling load efficiency.

关键词： green facades green roof natural ventilation thermal performance bioclimatic architecture.