Effect of irrigation on the experimental thermal performance of a green roof in a semi-warm climate in Mexico

Chagolla-Aranda, M.A.; Sima, Elena; Xamán, J.; Álvarez, G.; Hernández-Pérez, I.; Téllez-Velázquez, E.

doi:10.1016/j.enbuild.2017.08.082

Cited by 43 publications

(15 citation statements)

References 39 publications

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“…However, effects of substrate WC on green roof thermal performance are still controversial, producing contradictory results (van Mechelen et al, 2015). On one hand, irrigation can partly buffer high substrate temperatures in dry, hot summers, as moist substrates enhance evaporative cooling effects (Chagolla‐Aranda et al, 2017; Wang et al, 2017). On the other hand, higher WCs can increase substrate temperatures because water has higher thermal conductivity than air, enhancing heat transfer to the deeper substrate layers (Azeñas et al, 2018; Moody & Sailor, 2013; Theodosiou, 2003).…”

Section: Introductionmentioning

confidence: 99%

Green roof irrigation management based on substrate water potential assures water saving without affecting plant physiological performance

et al. 2022

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Irrigation management in extensive green roofs (EGRs) is crucial in Mediterranean and semi‐arid climates, as it should guarantee efficient water use while ensuring plant survival and vegetation cover. However, benefits of maintaining moderately low substrate water potential (Ψs) have not been adequately investigated to date. An irrigation control unit based on Ψs thresholds for irrigation (MediWater Safe [MWS]) was compared to a common irrigation timer maintaining Ψs ⁓ 0 MPa (CTR) in shrub‐vegetated Mediterranean EGR modules. The effect of the different irrigation regimes on substrate temperature, plant water relations (leaf conductance to water vapour, midday water potential and turgor loss point) and root vulnerability to heat stress via electrolyte leakage was tested in four shrub species. Decreasing Ψs thresholds to −0.4 MPa reduced irrigation volumes by 68% in 3 summer months. However, the MWS unit neither influenced plant water status and vegetation cover nor induced physiological acclimation responses. Brief irrigation cycles imposed by MWS in the warmest hours reduced substrate surface temperature by 3°C compared to CTR. Plant water status dynamics and root vulnerability to heat were species specific. Progressive stomatal closure and plant decline occurred only in Ceanothus thyrsiflorus and were associated to high root vulnerability to heat. Mortality occurred only in some Ceanothus plants in the CTR module, where higher Ψs favoured the expansion of Hyperucum x moserianum. The results suggest that selecting proper Ψs thresholds for irrigation could optimize EGR benefits, guaranteeing substantial water savings and proper plant establishment. Moreover, we claim root resistance to heat as a key parameter for plant selection in Mediterranean EGRs.

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Section: Introductionmentioning

confidence: 99%

Green roof irrigation management based on substrate water potential assures water saving without affecting plant physiological performance

et al. 2022

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“…In the study, evapotranspiration (ET) was modeled via the artificial neural network (ANN) consisting of multi-layer perceptron regressors. Chagolla-Aranda et al [6] analyzed the thermal impact of a green roof with five plants (i.e., Sedum adolphii, Echeveria prolífica, Aeonium subplanum, Crassula ovata y, and Sedum Makinoi) in Mexico. Particularly, the study found that electricity consumption of a green roof cell could be lower than that of a conventional roof cell in semi-warm climate.…”

Section: Introductionmentioning

confidence: 99%

Simulation Modeling of a Photovoltaic-Green Roof System for Energy Cost Reduction of a Building: Texas Case Study

2021

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This study aims at introducing a modeling and simulation approach for a green roof system which can reduce energy cost of a building exposed to high temperatures throughout the summer season. First, to understand thermal impact of a green roof system on a building surface, a field-based study has been conducted in Commerce, Texas, U.S., where the average maximum temperature in summer is 104 °F (40 °C). Two types of analyses were conducted: (1) comparison of temperature between different plant type via Analysis of variance (ANOVA) and (2) polynomial regression analysis to develop thermal impact estimation model based on air temperature and presence of a green roof. In addition, an agent-based simulation (ABS) model was developed via AnyLogic® University 8.6.0 simulation software, Chicago, IL, U.S., in order to accurately estimate energy cost and benefits of a building with a photovoltaic-green roof system. The proposed approach was applied to estimate energy reduction cost of the Keith D. McFarland Science Building at Texas A&M University, Commerce, Texas (33.2410° N, 95.9104° W). As a result, the proposed approach was able to save $740,325.44 in energy cost of a heating, ventilation, and air conditioning (HAVC) system in the subject building. The proposed approach will contribute to the implementation of a sustainable building and urban agriculture.

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“…Precipitation amount, stormwater runoff, dissolved organic carbon concentrations, total nitrogen and phosphorus concentrations were determined. Chagolla et al [12] conducted a study on the effect of irrigation on the experimental thermal performance of a green roof in a semi-hot climate in Mexico. Five types of plants from the Crassulaceae family were selected: Sedum Adolphi, Echeveria Prolifica, Aeonium Subplanum, Crassula Ovata and Sedum Makinoi.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Thermal Behavior of a Watercress Planted Roofed Cubic Cell to be Watered with Domestic Wastewater

Morau¹,

Rabesah

Rakotondramiarana

2021

JENRR

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One of the virtues of watercress is its ability to grow in wastewater. This work aims at experimentally studying the thermal behavior of a watercress planted roofed cubic cell. To do this, the temperatures of various components of the cell and the solar radiation received by this cell were measured in order to compare the watercress roof performance with that of the conventional concrete roof. Then, the influence of the opening applied on the door of the studied cell was analyzed. As results, the fluctuation amplitude of the indoor ambient temperature of the concrete roofed cell is wider than that of the green roofed cell. Moreover, the last opening applied to the facades of the cell was the optimum area that the ambient temperature indoor was more attenuated. The LAI’s crop was worth 1.2. In addition, the low value of the canopy apparent thermal conductivity revealed that this layer plays a role of thermal insulation. The rooftop greening allows energy savings of about 85% compared to the consumed energy with conventional roofing. An extension of this work could be the energy performance analysis of a system using renewable energy for pumping domestic wastewater produced in or around green roofed housing.

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Effect of irrigation on the experimental thermal performance of a green roof in a semi-warm climate in Mexico

Cited by 43 publications

References 39 publications

Green roof irrigation management based on substrate water potential assures water saving without affecting plant physiological performance

Green roof irrigation management based on substrate water potential assures water saving without affecting plant physiological performance

Simulation Modeling of a Photovoltaic-Green Roof System for Energy Cost Reduction of a Building: Texas Case Study

Experimental Study of the Thermal Behavior of a Watercress Planted Roofed Cubic Cell to be Watered with Domestic Wastewater

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