Sustainable agriculture for water-stressed regions by air-water-energy management

Entezari, Akram; Wang, R.Z.; Zhao, Sixiang; Mahdinia, Ehsan; Wang, J.Y.; Tu, Yaodong; Huang, Dan

doi:10.1016/j.energy.2019.06.045

Cited by 32 publications

(13 citation statements)

References 25 publications

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“…The results showed that the temperature of the air and plant could be kept within the range of 6-7 K and 5-6 K below ambient, respectively for an extreme summer day, and also 7-8 K and 5-6 K above ambient, respectively for an extreme winter night. The humidity control practices with soil fortifications were also studied by Entezari et al [140] for a sustainable air-water-harvesting (AWH) greenhouse management.…”

Section: Greenhouse Integrated Systemmentioning

confidence: 99%

Towards a Sustainable Greenhouse: Review of Trends and Emerging Practices in Analysing Greenhouse Ventilation Requirements to Sustain Maximum Agricultural Yield

et al. 2020

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Cultivation in open fields mainly depends on the location and time of farming, which itself highly depends on the quality and quantity of water for irrigation, weather conditions and soil characteristics. Water resources are highly dependent on the limited freshwater resources from the groundwater system, or rainwater. Countries in MENA (the Middle East and North Africa) rely mostly on desalination technologies for agriculture, due to water scarcity. Therefore, greenhouse (GH) agriculture can be developed to succeed in dealing with the water scarcity and provide sufficient sources of agricultural products as a sustainable solution. These indoor agriculture facilities, which are enclosed by transparent covers, can produce different sources of fruits and vegetables, using a controlled amount of water. By reducing the exchange rate of air with the outside environment, which is known as the confinement effects, greenhouses generate a suitable environment for the plants to grow under transparent covers to trap the sunlight. This raises the inside temperature above the maximum threshold levels, especially within the warm season, due to the high solar radiation intensity, having an adverse influence on the microclimate conditions and consequently the crop growth. In order to sustain maximum agricultural yield, greenhouse ventilation is an important parameter in which its trends and emerging practices were reviewed in this study.

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Section: Greenhouse Integrated Systemmentioning

confidence: 99%

Towards a Sustainable Greenhouse: Review of Trends and Emerging Practices in Analysing Greenhouse Ventilation Requirements to Sustain Maximum Agricultural Yield

et al. 2020

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“…The UN world water development report 2015 states that by 2050, an increase in 55 % of global water demand will be observed, and the world's agricultural sector will be required to generate 60 % more food, reaching up to 100 % in the developing nations [2]. The 2017 World Health Organization (WHO) reports that, with the prevailing climate change situation, more than 50 % of the world population will exist in high water stress areas by 2030 [3]. The intensifying water crisis is also associated to food production since agriculture accounts for 70 % of all freshwater usages [4], hence fresh water supply is one of the most significant future issues [5].…”

Section: Introductionmentioning

confidence: 99%

“…GH enables year-round crop production and improves the yield and quality of crops through control of the physical environmental factors such as light, water, temperature, relative humidity, CO2 concentration, and ventilation [7]. GH technology can guarantee the sustainable and secure food production by increasing the production yield up to ten times more [1], and decreasing the 11.8 m 3 /d per capita water requirements by 80 % compared to conventional cultivation [2,3]. However, GH energy consumption can be up to one hundred times more [8].…”

Section: Introductionmentioning

confidence: 99%

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Solar Driven Agricultural Greenhouse Integrated with Desalination System; Energy-Water-Food Nexus

Abdullahi

Salah

Fath

2020

Preprint

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This study presents the effective performance of a sustainable solar driven agricultural greenhouse (GH) self-reliant of energy and irrigation water via desalination. The GH is furnished with infrastructures such as; (i) - an inlet condenser for cool air exchanger and partial water production, (ii) - an internal cavity for crop production (iii) - roof transparent solar distillers (TSD) for solar desalination and partial shading and (iv)- a thermal chimney for natural air ventilation. A mathematical model is developed to predict the performance of the sustainable GH system. A coupled approach of MATLAB/Simulink and computational fluid dynamics (CFD) based on three simulation models were used: solar radiation, thermal energy balance and CFD model. Two parametric studies were carried out. The first one analyzed the effects of different air velocity on the system thermal performance and natural ventilation rate. The second study assessed the effects of different covering material on the transmitted solar radiation. Results from the model shows that 8.5 MJ/m2.day of total solar radiation is transmitted into the GH. The greenhouse air temperature is lowered by 5 °C and humidified by 20%, to satisfy the required conditions necessary for plant growth. Maximum water yield of 11.5 L/m2.day was obtained, aided by the addition of Al-metal net. Additionally, 2.6 kWh/m2.day of power is consumed by the air-cooling condenser. At air velocity of 0.3 m/s, there is a natural tendency of air to flow by draft, due to air temperature difference of up to 4 °C. Furthermore, glass and EVA cover materials transmit 52 and 48% of solar radiation into the GH respectively. The proposed system will enable the parallel production of water and food and enhance economical plant productivity.

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“…Remote sensing (RS), which involves technologies and models for estimating surface soil moisture by vast and cost-effective spatial and temporal distribution in mapping hydrological variables during recent years, has provided authentic estimates of evaporation and surface soil moisture and has satisfied information needs of researchers and managers (Entezari et al 2019). Today, many RS experts use a combination of reflective and thermal data and energy balance models to collect data on vegetation and monitor soil moisture .…”

Section: Introductionmentioning

confidence: 99%

Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System

Jahangir

Arast

2020

Nat Resour Res

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Soil moisture is a vital resource that plays a critical role in arid and semi-arid areas. In the present study, a new approach was adopted to estimate surface soil moisture based on multiindex models using reflective and thermal indices as well as surface energy balance system-Iran (SEBS-Iran) in pastures and farmlands in Qom province, Iran in 2016-2017. To select the best model based on remote sensing (RS) indices, 12 models were designed and after analysis, the best ones were selected. Afterward, the results of the SEBS-Iran algorithm and the improved multi-index model [normalized multi-band drought index (NMDI), normalized difference vegetation index (NDVI), land surface temperature (LST) and the temperature vegetation dryness index (TVDI)] were calibrated with field data in the two studied fields (pastures and farmlands). The findings indicated that the multi-index model NMDI-TDVI-LST-NDVI (R = 0.95) and SEBS-Iran (R = 0.93) both had significant correlations with measured soil moisture. Regarding both models in farmlands and pastures, the SEBS-Iran regression model was closer to the line of fit, and R 2 in the two fields was 0.95 and 0.96, respectively. Compared to SEBS-Iran, the multi-index model showed lower coefficient of determination in pastures (0.71) due to the higher accuracy of SEBS-Iran in areas with lower vegetation density. Generally, both methods were found to be suitable for soil moisture estimation. The multi-index model can be used to estimate soil moisture in densely vegetated areas on a large scale due to its simplicity and good accuracy. Moreover, the highly accurate SEBS-Iran model can be used even in sparsely vegetated areas.

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Sustainable agriculture for water-stressed regions by air-water-energy management

Cited by 32 publications

References 25 publications

Towards a Sustainable Greenhouse: Review of Trends and Emerging Practices in Analysing Greenhouse Ventilation Requirements to Sustain Maximum Agricultural Yield

Towards a Sustainable Greenhouse: Review of Trends and Emerging Practices in Analysing Greenhouse Ventilation Requirements to Sustain Maximum Agricultural Yield

Solar Driven Agricultural Greenhouse Integrated with Desalination System; Energy-Water-Food Nexus

Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System

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