Small-scale experiments of seasonal heat stress attenuation through a combination of green roof and green walls

2020 ◽  
Vol 250 ◽  
pp. 119443 ◽  
Author(s):  
Renato Castiglia Feitosa ◽  
Sara J. Wilkinson
Keyword(s):  
Heat Stress ◽  
Green Roof ◽  
Small Scale ◽  
Green Walls ◽  
Seasonal Heat

Feedlot growth, carcass characteristics and meat quality of hair breed male lambs exposed to seasonal heat stress (winter vs. summer) in an arid climate

Meat Science ◽  
2020 ◽  
Vol 169 ◽  
pp. 108202
Author(s):  
Ulises Macías-Cruz ◽  
Oscar R. Saavedra ◽  
Abelardo Correa-Calderón ◽  
Miguel Mellado ◽  
Noemí G. Torrentera ◽  
...  
Keyword(s):  
Heat Stress ◽  
Meat Quality ◽  
Carcass Characteristics ◽  
Arid Climate ◽  
Seasonal Heat

Seasonal heat flux properties of an extensive green roof in a Midwestern U.S. climate

2011 ◽  
Vol 43 (12) ◽  
pp. 3548-3557 ◽  
Author(s):  
Kristin L. Getter ◽  
D. Bradley Rowe ◽  
Jeff A. Andresen ◽  
Indrek S. Wichman
Keyword(s):  
Heat Flux ◽  
Green Roof ◽  
Extensive Green Roof ◽  
Seasonal Heat

Designing and Installing a Retrofit Heated Green Roof Using Either Co-Gen Waste Hot Water or Municipal Waste Steam Heat as Energy Source

2014 ◽  
Author(s):  
Robert Dell ◽  
C. S. Wei ◽  
Raj Parikh ◽  
Runar Unnthorsson ◽  
William Foley
Keyword(s):  
New York ◽  
New York City ◽  
York City ◽  
Waste Heat ◽  
Green Roof ◽  
Cooling Water ◽  
District Heating ◽  
Green Roofs ◽  
Hot Water ◽  
Small Scale

Municipal District Heating Services and Combined Heat and Power (CHP) systems can produce waste heat in the form of steam condensate and hot water. The authors have developed a system to use this thermal pollution to heat the soil and growth medium of green roofs and outdoor gardens. The system enables plant life to survive colder climates and increases growth often in excess of 20% (Power2013-98172). In New York City test heated green roofs, the system can save vast amounts of normally required cooling water that is tapped from the overburdened municipal supply (IMECE2013-65200). Existing small scale green roofs in New York City and larger scale heated green roof retrofit in New York City is presented to indicate additional construction details, thermal considerations, and potential code compliance considerations.

scholarly journals Planning Nature-Based Solutions for Urban Flood Reduction and Thermal Comfort Enhancement

2019 ◽  
Vol 11 (22) ◽  
pp. 6361 ◽  
Author(s):  
Majidi ◽  
Vojinovic ◽  
Alves ◽  
Weesakul ◽  
Sanchez ◽  
...  
Keyword(s):  
Heat Stress ◽  
Thermal Comfort ◽  
Risk Reduction ◽  
Flood Risk ◽  
Field Measurements ◽  
Flood Mitigation ◽  
Mitigation Measures ◽  
Small Scale ◽  
Urban Flood ◽  
Flood Risk Reduction

As a consequence of climate change and urbanization, many cities will have to deal with more flooding and extreme heat stress. This paper presents a framework to maximize the effectiveness of Nature-Based Solutions (NBS) for flood risk reduction and thermal comfort enhancement. The framework involves an assessment of hazards with the use of models and field measurements. It also detects suitable implementation sites for NBS and quantifies their effectiveness for thermal comfort enhancement and flood risk reduction. The framework was applied in a densely urbanized study area, for which different small-scale urban NBS and their potential locations for implementation were assessed. The overall results show that the most effective performance in terms of flood mitigation and thermal comfort enhancement is likely achieved by applying a range of different measures at different locations. Therefore, the work presented here shows the potential of the framework to achieve an effective combination of measures and their locations, which was demonstrated on the case of the Sukhumvit area in Bangkok (Thailand). This can be particularly suitable for assessing and planning flood mitigation measures in combination with heat stress reduction.

Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows

2015 ◽  
Vol 84 (5) ◽  
pp. 659-666 ◽  
Author(s):  
F. De Rensis ◽  
I. Garcia-Ispierto ◽  
F. López-Gatius
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Clinical Implications ◽  
Seasonal Heat

Is the hydrological response of Nature-Based Solutions related to the spatial variability of rainfall?

2020 ◽  
Author(s):  
Yangzi Qiu ◽  
Ioulia Tchiguirinskaia ◽  
Daniel Scherzter
Keyword(s):  
Spatial Variability ◽  
Green Roof ◽  
Urban Environments ◽  
Rainfall Data ◽  
Percentage Error ◽  
Small Scale ◽  
Hydrological Response ◽  
Urban Catchment ◽  
Rainfall Events ◽  
Porous Pavement

<p>Nature-Based Solutions (NBS) practices provide many benefits for sustainable development of urban environments, one of which is their ability to mitigate the urban waterlogging. In many previous studies, the performances of NBS practices are analysed with the semi-distributed model and artificial rainfall without considering the spatial variability of rainfall. However, the NBS practices are decentralized in urban areas, their hydrological response is very depends on the small-scale heterogeneity of urban environments. Therefore, this research aims to investigate the impacts of small-scale rainfall variability on the hydrological responses of NBS practices.</p><p>In this study, the hydrological response of NBS practices was analysed at the urban catchment scale. A 5.2 km<sup>2</sup> semi-urban catchment (Guyancourt, located in the South-West of Paris) are investigated under various future NBS implementation scenarios (porous pavement, green roof, rain garden and combined). Regarding the objective of this research, three typical rainfall events are selected. Three sets of distributed rainfall data at a high resolution of 250 m×250 m×3.41 min were obtained from the X-band radar of Ecole des Ponts ParisTech (ENPC). In addition, three sets of corresponded homogeneous rainfall data are applied and used for comparing with the distributed one. Furthermore, a fully distributed and grid based hydrological model (Multi-Hydro), developed at ENPC, which takes into consideration the spatial variability of the whole catchment at 10 m scale. The hydrological response of NBS scenarios was analysed with the percentage error on total volume and peak discharge, with regards to the baseline scenario (current configuration).</p><p>Results show that the spatial variability of rainfall has the impact on the hydrological response of NBS scenarios in varying degrees, and it is more evident for green roof scenario. In three rainfall events, the maximum percentage error on peak discharge of green roof scenario under distributed rainfall is 23 %, while that of the green roof scenario under homogeneous rainfall is 17.7%. Overall, the results suggest that the implementation of porous pavement and rain garden is more flexible than implementation of green roof in a semi-urban catchment.</p>

scholarly journals Effect of Turf Roof Slabs on Indoor Thermal Performance in Tropical Climates: A Life Cycle Cost Approach

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
R. U. Halwatura
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Air Conditioning ◽  
Green Roof ◽  
Green Roofs ◽  
Scale Model ◽  
Small Scale ◽  
Indoor Temperature ◽  
Scale Models ◽  
Different Types

Urbanization related to population growth is one of the burning issues that the world is facing today. Parallel to this, there is visible evidence of a possible energy crisis in the near future. Thus, scientists have paid attention to sustainable development methods, and in the field of building construction also, several innovations have been proposed. For example, green roof concept is one of such which is considered a viable method mainly to reduce urban heat island effect, to regain lost land spaces in cities, and to increase aesthetics in cities. The present study was aimed at investigating the impact of green roofs on indoor temperature of buildings, the effect of different types of roofs on the air conditioning loads, and the life cycle cost of buildings with different types of roofing. The study was conducted in several phases: initial small-scale models to determine the heat flow characteristics of roof top soil layers with different thicknesses, a large-scale model applying the findings of the small-scale models to determine temperature fluctuations within a building with other common roofing systems, a computer simulation to investigate air conditioning loads in a typical building with cement fiber sheets and green roof slabs, a comparative analysis of the effect of traditional type roofs and green roofs on the air conditioning loads, and finally an analysis to predict the influence of traditional type roofs and green roofs on life cycle cost of the buildings. The main findings of the study were that green roofs are able to reduce the indoor temperature of buildings and are able to achieve better heat transfer through the roof, and, thus a lower cooling load is necessary for air conditioning and has the possibility of reducing life cycle cost of a building.

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